WO2022244611A1 - 光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 - Google Patents
光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 Download PDFInfo
- Publication number
- WO2022244611A1 WO2022244611A1 PCT/JP2022/019226 JP2022019226W WO2022244611A1 WO 2022244611 A1 WO2022244611 A1 WO 2022244611A1 JP 2022019226 W JP2022019226 W JP 2022019226W WO 2022244611 A1 WO2022244611 A1 WO 2022244611A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- light
- compound
- absorbing material
- material according
- Prior art date
Links
- 239000011358 absorbing material Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims description 44
- 150000001875 compounds Chemical class 0.000 claims abstract description 100
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 7
- 229910052794 bromium Inorganic materials 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 6
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 6
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 5
- 230000003287 optical effect Effects 0.000 claims description 61
- 125000000217 alkyl group Chemical group 0.000 claims description 21
- 125000005843 halogen group Chemical group 0.000 claims description 13
- 125000003545 alkoxy group Chemical group 0.000 claims description 10
- 125000006575 electron-withdrawing group Chemical group 0.000 claims description 10
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 10
- 229930195735 unsaturated hydrocarbon Natural products 0.000 claims description 9
- 125000000565 sulfonamide group Chemical group 0.000 claims description 7
- 125000002252 acyl group Chemical group 0.000 claims description 6
- 125000004423 acyloxy group Chemical group 0.000 claims description 6
- 125000005035 acylthio group Chemical group 0.000 claims description 6
- 125000004453 alkoxycarbonyl group Chemical group 0.000 claims description 6
- 125000004390 alkyl sulfonyl group Chemical group 0.000 claims description 6
- 125000004414 alkyl thio group Chemical group 0.000 claims description 6
- 125000003368 amide group Chemical group 0.000 claims description 6
- 125000004429 atom Chemical group 0.000 claims description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 6
- 229930195734 saturated hydrocarbon Natural products 0.000 claims description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 5
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 5
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 5
- 125000001302 tertiary amino group Chemical group 0.000 claims description 5
- 125000003396 thiol group Chemical group [H]S* 0.000 claims description 5
- 125000003172 aldehyde group Chemical group 0.000 claims description 4
- 125000002560 nitrile group Chemical group 0.000 claims description 4
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 4
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 claims description 4
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 2
- 238000010521 absorption reaction Methods 0.000 description 109
- 229940126062 Compound A Drugs 0.000 description 57
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 description 57
- 239000000463 material Substances 0.000 description 31
- 239000000243 solution Substances 0.000 description 30
- 239000010410 layer Substances 0.000 description 29
- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 20
- 230000008033 biological extinction Effects 0.000 description 19
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 18
- 239000000523 sample Substances 0.000 description 18
- 238000005259 measurement Methods 0.000 description 16
- 230000031700 light absorption Effects 0.000 description 15
- -1 2,3-dimethylhexyl Chemical group 0.000 description 13
- 150000002430 hydrocarbons Chemical group 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 11
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 10
- 230000015654 memory Effects 0.000 description 10
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 9
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 9
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 8
- 239000011342 resin composition Substances 0.000 description 8
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000012044 organic layer Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 6
- 238000005160 1H NMR spectroscopy Methods 0.000 description 5
- 238000005481 NMR spectroscopy Methods 0.000 description 5
- 238000004440 column chromatography Methods 0.000 description 5
- 239000012043 crude product Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 239000000975 dye Substances 0.000 description 5
- 239000011368 organic material Substances 0.000 description 5
- 238000005292 vacuum distillation Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 4
- PCLIMKBDDGJMGD-UHFFFAOYSA-N N-bromosuccinimide Chemical compound BrN1C(=O)CCC1=O PCLIMKBDDGJMGD-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 238000004949 mass spectrometry Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 125000001424 substituent group Chemical group 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 235000019270 ammonium chloride Nutrition 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- 239000012300 argon atmosphere Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- DOBRDRYODQBAMW-UHFFFAOYSA-N copper(i) cyanide Chemical compound [Cu+].N#[C-] DOBRDRYODQBAMW-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- WAMKWBHYPYBEJY-UHFFFAOYSA-N duroquinone Chemical compound CC1=C(C)C(=O)C(C)=C(C)C1=O WAMKWBHYPYBEJY-UHFFFAOYSA-N 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000005281 excited state Effects 0.000 description 3
- 239000007850 fluorescent dye Substances 0.000 description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 3
- 235000019341 magnesium sulphate Nutrition 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- 239000013638 trimer Substances 0.000 description 3
- SDGNTWFWHWDWNC-UHFFFAOYSA-N 1,2,3,4,5,6-hexakis(2-phenylethynyl)benzene Chemical compound C1=CC=CC=C1C#CC(C(=C(C#CC=1C=CC=CC=1)C(C#CC=1C=CC=CC=1)=C1C#CC=2C=CC=CC=2)C#CC=2C=CC=CC=2)=C1C#CC1=CC=CC=C1 SDGNTWFWHWDWNC-UHFFFAOYSA-N 0.000 description 2
- USDDSYZWAYRCCZ-UHFFFAOYSA-N 1-bromo-2-(2-bromo-4,5-dimethoxyphenyl)-4,5-dimethoxybenzene Chemical group C1=C(OC)C(OC)=CC(Br)=C1C1=CC(OC)=C(OC)C=C1Br USDDSYZWAYRCCZ-UHFFFAOYSA-N 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 239000012472 biological sample Substances 0.000 description 2
- 238000005893 bromination reaction Methods 0.000 description 2
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001425 electrospray ionisation time-of-flight mass spectrometry Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- VAVHMEQFYYBAPR-ITWZMISCSA-N (e,3r,5s)-7-[4-(4-fluorophenyl)-1-phenyl-2-propan-2-ylpyrrol-3-yl]-3,5-dihydroxyhept-6-enoic acid Chemical compound CC(C)C1=C(\C=C\[C@@H](O)C[C@@H](O)CC(O)=O)C(C=2C=CC(F)=CC=2)=CN1C1=CC=CC=C1 VAVHMEQFYYBAPR-ITWZMISCSA-N 0.000 description 1
- KZMAWJRXKGLWGS-UHFFFAOYSA-N 2-chloro-n-[4-(4-methoxyphenyl)-1,3-thiazol-2-yl]-n-(3-methoxypropyl)acetamide Chemical compound S1C(N(C(=O)CCl)CCCOC)=NC(C=2C=CC(OC)=CC=2)=C1 KZMAWJRXKGLWGS-UHFFFAOYSA-N 0.000 description 1
- 125000004493 2-methylbut-1-yl group Chemical group CC(C*)CC 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000005374 Kerr effect Effects 0.000 description 1
- 230000005697 Pockels effect Effects 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000006612 decyloxy group Chemical group 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- UBJFKNSINUCEAL-UHFFFAOYSA-N lithium;2-methylpropane Chemical compound [Li+].C[C-](C)C UBJFKNSINUCEAL-UHFFFAOYSA-N 0.000 description 1
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001196 nonadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000006611 nonyloxy group Chemical group 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000005447 octyloxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/355—Non-linear optics characterised by the materials used
- G02F1/361—Organic materials
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3523—Non-linear absorption changing by light, e.g. bleaching
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24035—Recording layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
Definitions
- the present disclosure relates to a light absorbing material, a recording medium, an information recording method, and an information reading method.
- nonlinear optical materials materials that have a non-linear optical effect are called nonlinear optical materials.
- the nonlinear optical effect means that when a substance is irradiated with strong light such as laser light, an optical phenomenon proportional to the square of the electric field of the irradiated light or a higher order than the square occurs in the substance.
- Optical phenomena include absorption, reflection, scattering, and light emission.
- Second-order nonlinear optical effects that are proportional to the square of the electric field of illuminating light include second harmonic generation (SHG), Pockels effect, and parametric effects.
- Three-order nonlinear optical effects proportional to the cube of the electric field of the illuminating light include two-photon absorption, multi-photon absorption, third harmonic generation (THG), Kerr effect, and the like.
- multiphoton absorption such as two-photon absorption is sometimes referred to as nonlinear optical absorption.
- a material capable of nonlinear optical absorption is sometimes called a nonlinear optical absorption material.
- a material capable of two-photon absorption is sometimes called a two-photon absorption material.
- nonlinear optical materials A lot of research has been actively carried out on nonlinear optical materials.
- inorganic materials from which single crystals can be easily prepared have been developed as nonlinear optical materials.
- nonlinear optical materials made of organic materials include organic dyes.
- Organic materials not only have a higher degree of design freedom than inorganic materials, but also have large nonlinear optical constants.
- organic materials exhibit fast nonlinear responses.
- nonlinear optical materials containing organic materials are sometimes referred to as organic nonlinear optical materials.
- the light-absorbing material in one aspect of the present disclosure is A compound represented by the following formula (1) is included as a main component.
- R 1 to R 14 each independently contain at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br; , n is an integer of 2 or more.
- the present disclosure provides a light absorbing material with improved nonlinear light absorption properties for light having wavelengths in the short wavelength range.
- FIG. 1A is a flow chart of an information recording method using a recording medium containing a light absorbing material according to an embodiment of the present disclosure.
- FIG. 1B is a flow chart of a method for reading information using a recording medium containing a light absorbing material according to an embodiment of the present disclosure;
- 2A is a graph showing the 1 H-NMR spectrum of the compound of Example 1.
- FIG. 2B is an enlarged view of the graph of FIG. 2A.
- 3A is a graph showing the 1 H-NMR spectrum of the compound of Example 2.
- FIG. 3B is an enlarged view of the graph of FIG. 3A.
- 4A is a graph showing the 1 H-NMR spectrum of the compound of Example 3.
- FIG. FIG. 4B is an enlarged view of the graph of FIG.
- 5A is a graph showing the 1 H-NMR spectrum of the compound of Example 4.
- FIG. 5B is an enlarged view of the graph of FIG. 5A.
- 6A is a graph showing the 1 H-NMR spectrum of the compound of Example 5.
- FIG. 6B is an enlarged view of the graph of FIG. 6A.
- Two-photon absorption materials have attracted particular attention.
- Two-photon absorption means a phenomenon in which a compound absorbs two photons almost simultaneously and transitions to an excited state.
- Non-resonant two-photon absorption and resonant two-photon absorption are known as two-photon absorption.
- Non-resonant two-photon absorption means two-photon absorption in a wavelength range in which no one-photon absorption band exists.
- a compound absorbs two photons almost simultaneously and transitions to a higher excited state.
- a compound absorbs a first photon and then transitions to a higher excited state by further absorbing a second photon. In resonant two-photon absorption, a compound absorbs two photons sequentially.
- the two-photon absorption material further has fluorescence properties, it can also be applied to fluorescent dye materials used in two-photon fluorescence microscopes and the like. If this two-photon absorption material is used in a three-dimensional optical memory, it may be possible to adopt a method of reading the ON/OFF state of the recording layer based on changes in fluorescence from the two-photon absorption material.
- Current optical memories adopt a method of reading the ON/OFF state of a recording layer based on changes in light reflectance and light absorption in a two-photon absorption material. However, when this method is applied to a three-dimensional optical memory, crosstalk may occur based on a recording layer different from the recording layer whose ON/OFF state should be read.
- a two-photon absorption cross section (GM value) is used as an indicator of efficiency of two-photon absorption.
- the unit of the two-photon absorption cross section is GM (10 ⁇ 50 cm 4 ⁇ s ⁇ molecule ⁇ 1 ⁇ photon ⁇ 1 ).
- Many organic two-photon absorption materials with large two-photon absorption cross sections have been proposed so far. For example, many compounds with two-photon absorption cross sections as large as over 500 GM have been reported (eg, Non-Patent Document 1). However, in most reports the two-photon absorption cross section is measured using laser light with a wavelength longer than 600 nm. In particular, near-infrared rays having a wavelength longer than 750 nm are sometimes used as laser light.
- a light emitting device that emits an ultrashort pulse laser with high light intensity tends to be large and unstable in operation. Therefore, it is difficult to adopt such a light-emitting device for industrial use from the viewpoint of versatility and reliability. Considering this fact, in order to apply two-photon absorption materials to industrial applications, materials that exhibit two-photon absorption characteristics even when irradiated with a laser beam of low light intensity are desired.
- Formula (i) is a calculation formula for calculating the decrease in light intensity -dI when a sample containing a two-photon absorption compound and having a very small thickness dz is irradiated with light of intensity I.
- the decrease in light intensity -dI is expressed by the sum of a term proportional to the first power of the intensity I of the incident light on the sample and a term proportional to the square of the intensity I.
- ⁇ is the one-photon absorption coefficient (cm ⁇ 1 ).
- ⁇ (2) is the two-photon absorption coefficient (cm/W). From equation (i), it can be seen that the incident light intensity I when the one-photon absorption and the two-photon absorption are equal in the sample is expressed by ⁇ / ⁇ (2) . That is, when the intensity I of incident light is smaller than ⁇ / ⁇ (2) , one-photon absorption preferentially occurs in the sample. Two-photon absorption occurs preferentially in the sample when the intensity I of the incident light is greater than ⁇ / ⁇ (2) . Therefore, there is a tendency that the smaller the value of ⁇ / ⁇ (2) in the sample, the more preferentially two-photon absorption can be achieved by a laser beam with a lower light intensity.
- ⁇ and ⁇ (2) can be represented by the following formulas (ii) and (iii), respectively.
- ⁇ is the molar extinction coefficient (mol ⁇ 1 ⁇ L ⁇ cm ⁇ 1 ).
- N is the number of molecules of the compound per unit volume of the sample (mol ⁇ cm ⁇ 3 ).
- N A is Avogadro's constant.
- ⁇ is the two-photon absorption cross section (GM).
- h ⁇ (h bar) is the Dirac constant (J ⁇ s).
- ⁇ is the angular frequency (rad/s) of incident light.
- ⁇ / ⁇ (2) is determined by ⁇ / ⁇ . That is, in order to preferentially express two-photon absorption by laser light with low light intensity, the ratio ⁇ / ⁇ of the two-photon absorption cross section ⁇ to the molar extinction coefficient ⁇ is large with respect to the wavelength of the irradiated laser light. is desirable. For a compound, when the value of the ratio ⁇ / ⁇ at a particular wavelength is large, it can be said that the nonlinearity of light absorption at that wavelength is high.
- a through-bond type pi-conjugated compound is a compound in which a conjugated system is extended via a covalent bond.
- multiple pi-electron clouds interact via covalent bonds.
- the conjugated system of the through-bond type pi-conjugated compound is extended, the absorption wavelength derived from one-photon absorption tends to shift to the longer wavelength side.
- the shift of the absorption wavelength due to one-photon absorption to the longer wavelength side is sometimes referred to as a long wavelength shift or a red shift.
- the absorption wavelength derived from one-photon absorption shifting to a longer wavelength part of the wavelength region in which one-photon absorption occurs may overlap with the wavelength of the excitation light.
- a specific example of the wavelength of the excitation light is 405 nm defined by the Blu-ray (registered trademark) standard.
- the compound represented by the formula (1) described later has excellent nonlinear optical absorption characteristics with respect to light having a wavelength in the short wavelength region.
- the short wavelength range means a wavelength range including 405 nm, for example, a wavelength range of 390 nm or more and 420 nm or less.
- the compound represented by formula (1) has excellent nonlinear optical absorption properties for light having a wavelength around 405 nm. Furthermore, in this compound, the longer the chain length, the more the nonlinear optical absorption characteristics tend to improve.
- the light absorbing material according to the first aspect of the present disclosure includes A compound represented by the following formula (1) is included as a main component.
- R 1 to R 14 each independently contain at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br; , n is an integer of 2 or more.
- the light-absorbing material according to the first aspect has a large ratio ⁇ / ⁇ of the two-photon absorption cross-sectional area ⁇ to the molar absorption coefficient ⁇ for light having a wavelength in the short wavelength region, and tends to exhibit excellent nonlinear light absorption characteristics. There is In this way, the light absorbing material has improved nonlinear light absorption characteristics for light having wavelengths in the short wavelength range.
- n in formula (1) is 2 or more
- the above compound forms, for example, a pi-stack structure.
- a pi-stack structure means a structure in which a plurality of pi-electron clouds interact through space.
- a compound in which a pi-stack structure is formed in the molecule is sometimes called a through-space type pi-conjugated compound.
- the longer the chain length the more the nonlinear optical absorption characteristics tend to improve.
- Compounds of formula (1) also tend to be highly soluble in organic solvents.
- R 1 to R 14 are each independently a hydrogen atom, a halogen atom, a saturated hydrocarbon group, a halogenated alkyl group, Unsaturated hydrocarbon group, hydroxyl group, carboxyl group, alkoxycarbonyl group, aldehyde group, acyl group, amide group, nitrile group, alkoxy group, acyloxy group, thiol group, alkylthio group, sulfonic acid group, acylthio group, alkylsulfonyl group , a sulfonamide group, a primary amino group, a secondary amino group, a tertiary amino group or a nitro group.
- At least one selected may be an electron donating group.
- the electron donating group may be an alkoxy group.
- the electron donating group may be -OCH3 .
- At least one selected from the group consisting of R 5 and R 10 is an electron withdrawing group may be
- the electron-withdrawing group may be a halogen group.
- the compound may have a helical structure.
- the compound may have a property of absorbing specific light.
- the light-absorbing material according to any one of the first to ninth aspects may be used in devices that utilize light having a wavelength of 390 nm or more and 420 nm or less.
- the light absorbing material has improved nonlinear light absorption characteristics with respect to light having a wavelength in the short wavelength range.
- the light-absorbing materials according to the second to tenth aspects are suitable for use in devices that utilize light having a wavelength of 390 nm or more and 420 nm or less.
- the recording medium according to the eleventh aspect of the present disclosure includes A recording layer containing the light absorbing material according to any one of the first to tenth aspects is provided.
- the light absorbing material has improved nonlinear light absorption characteristics with respect to light having a wavelength in the short wavelength range.
- a recording medium having a recording layer containing such a light-absorbing material can record information at a high recording density.
- An information recording method includes: preparing a light source that emits light having a wavelength of 390 nm or more and 420 nm or less; condensing the light from the light source and irradiating the recording layer in the recording medium according to the eleventh aspect.
- the light absorbing material has improved nonlinear light absorption characteristics for light having a wavelength in the short wavelength range. According to an information recording method using a recording medium having a recording layer containing such a light-absorbing material, information can be recorded at a high recording density.
- An information reading method is, for example, a method for reading information recorded by the recording method according to the twelfth aspect, comprising: The reading method is measuring optical characteristics of the recording layer by irradiating the recording layer with light; and reading the information from the recording layer.
- the optical characteristic may be the intensity of light reflected by the recording layer.
- the light absorbing material of this embodiment contains a compound A represented by the following formula (1).
- R 1 to R 14 each independently contain at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br.
- R 1 to R 14 each independently represent a hydrogen atom, a halogen atom, a saturated hydrocarbon group, a halogenated alkyl group, an unsaturated hydrocarbon group, a hydroxyl group, a carboxyl group, an alkoxycarbonyl group, an aldehyde group, an acyl group, amido group, nitrile group, alkoxy group, acyloxy group, thiol group, alkylthio group, sulfonic acid group, acylthio group, alkylsulfonyl group, sulfonamide group, primary amino group, secondary amino group, tertiary amino group or nitro group may be
- Halogen atoms include F, Cl, Br, and I.
- a halogen atom may be referred to as a halogen group.
- a saturated hydrocarbon group is, for example, an aliphatic saturated hydrocarbon group.
- a specific example of an aliphatic saturated hydrocarbon group is an alkyl group.
- the number of carbon atoms in the alkyl group is not particularly limited, and is, for example, 1 or more and 20 or less.
- the number of carbon atoms in the alkyl group may be 1 or more and 10 or less, or 1 or more and 5 or less, from the viewpoint of facilitating synthesis of compound A.
- the alkyl group may be linear, branched, or cyclic.
- At least one hydrogen atom contained in the alkyl group may be substituted with a group containing at least one atom selected from the group consisting of N, O, P and S.
- Alkyl groups include methyl, ethyl, propyl, butyl, 2-methylbutyl, pentyl, hexyl, 2,3-dimethylhexyl, heptyl, octyl, nonyl, decyl, and undecyl groups.
- dodecyl group dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, eicosyl group, 2-methoxybutyl group, 6-methoxyhexyl group and the like.
- a halogenated alkyl group means a group in which at least one hydrogen atom contained in an alkyl group is substituted with a halogen atom.
- a halogenated alkyl group may be a group in which all hydrogen atoms contained in an alkyl group are substituted with halogen atoms. Examples of alkyl groups include those described above.
- a specific example of a halogenated alkyl group is --CF 3 .
- the unsaturated hydrocarbon group includes unsaturated bonds such as carbon-carbon double bonds and carbon-carbon triple bonds.
- the number of unsaturated bonds contained in the unsaturated hydrocarbon group is, for example, 1 or more and 5 or less.
- the number of carbon atoms in the unsaturated hydrocarbon group is not particularly limited, and may be, for example, 2 to 20, may be 2 to 10, or may be 2 to 5.
- the unsaturated hydrocarbon group may be linear, branched, or cyclic.
- At least one hydrogen atom contained in the unsaturated hydrocarbon group may be substituted with a group containing at least one atom selected from the group consisting of N, O, P and S.
- Examples of unsaturated hydrocarbon groups include vinyl groups and ethynyl groups.
- a hydroxyl group is represented by -OH.
- a carboxyl group is represented by -COOH.
- An alkoxycarbonyl group is represented by -COOR a .
- An aldehyde group is represented by -COH.
- An acyl group is represented by -COR b .
- An amide group is represented by -CONR c R d .
- a nitrile group is represented by -CN.
- An alkoxy group is represented by -OR e .
- An acyloxy group is represented by -OCOR f .
- a thiol group is represented by —SH.
- An alkylthio group is represented by -SR g .
- a sulfonic acid group is represented by --SO 3 H.
- An acylthio group is represented by -SCOR h .
- An alkylsulfonyl group is represented by --SO 2 R i .
- a sulfonamide group is represented by --SO 2 NR j R k .
- a primary amino group is represented by -NH2 .
- a secondary amino group is represented by —NHR 1 .
- a tertiary amino group is represented by —NR m R n .
- a nitro group is represented by —NO 2 .
- R a to R n are each independently an alkyl group. Examples of alkyl groups include those described above. However, R c and R d of the amide group and R j and R k of the sulfonamide group may each independently be a hydrogen atom.
- alkoxycarbonyl groups are --COOCH 3 , --COO(CH 2 ) 3 CH 3 and --COO(CH 2 ) 7 CH 3 .
- a specific example of an acyl group is -COCH3 .
- a specific example of an amide group is --CONH 2 .
- alkoxy groups include methoxy, ethoxy, 2-methoxyethoxy, butoxy, 2-methylbutoxy, 2-methoxybutoxy, 4-ethylthiobutoxy, pentyloxy, hexyloxy and heptyl.
- acyloxy group octyloxy group, nonyloxy group, decyloxy group, undecyloxy group, dodecyloxy group, tridecyloxy group, tetradecyloxy group, pentadecyloxy group, hexadecyloxy group, heptadecyloxy group, octadecyloxy group , a nonadecyloxy group and an eicosyloxy group.
- a specific example of an acyloxy group is --OCOCH 3 .
- An example of an alkylthio group is --SCH 3 .
- a specific example of an acylthio group is -SCOCH3 .
- a specific example of an alkylsulfonyl group is --SO 2 CH 3 .
- a specific example of a sulfonamide group is --SO 2 NH 2 .
- a specific example of a tertiary amino group is --N(CH 3 ) 2 .
- At least one selected from the group consisting of R 2 , R 3 , R 7 , R 8 , R 12 and R 13 is, for example, an electron donating group.
- Each of R2 , R3 , R7 , R8 , R12 and R13 may be an electron donating group.
- Compound A in which R 2 , R 3 , R 7 , R 8 , R 12 or R 13 is an electron donating group can be easily synthesized. This compound A also tends to have highly nonlinear optical absorption properties.
- the electron-donating group means, for example, a substituent having a negative ⁇ p value, which is a substituent constant in the Hammett formula.
- Electron donating groups include alkyl groups, alkoxy groups, hydroxyl groups, amino groups, and the like.
- the electron donating group may be an alkoxy group or may be -OCH3 .
- the electron donating group may be an alkyl group or -C(CH 3 ) 3 .
- At least one selected from the group consisting of R 5 and R 10 is, for example, an electron-withdrawing group.
- Each of R 5 and R 10 may be an electron withdrawing group.
- Compound A in which R 5 or R 10 is an electron withdrawing group can be easily synthesized. This compound A also tends to be more stable.
- An electron-withdrawing group means, for example, a substituent having a positive ⁇ p value.
- electron withdrawing groups include halogen groups, carboxyl groups, nitro groups, thiol groups, sulfonic acid groups, acyloxy groups, alkylthio groups, alkylsulfonyl groups, sulfonamide groups, acyl groups, acylthio groups, alkoxycarbonyl groups, and halogenated alkyl groups. and the like.
- the electron withdrawing group may be a halogen group or may be -Br.
- R 1 to R 14 R 1 , R 4 , R 6 , R 9 , R 11 and R 14 are R 1 , R 4 , R 6 , R 9 , R 11 and It may have a smaller volume than the substituents other than R 14 . At this time, steric hindrance hardly occurs in R 1 , R 4 , R 6 , R 9 , R 11 and R 14 . Therefore, in compound A, a pi-stack structure tends to be easily formed and the nonlinear light absorption characteristics tend to be improved.
- Each of R 1 , R 4 , R 6 , R 9 , R 11 and R 14 may be a hydrogen atom.
- n is an integer of 2 or more. n may be 6 or more, 10 or more, 12 or more, or 14 or more. The greater the value of n, the longer the chain length of compound A. In compound A, the longer the chain length, the more the nonlinear optical absorption characteristics tend to improve. That is, in compound A, unlike conventional through-bond type pi-conjugated compounds, deterioration of nonlinear optical absorption characteristics tends to be suppressed even when the pi-conjugated system is extended.
- the upper limit of n is not particularly limited, and is 46, for example. Specific examples of n include 2, 6, 10, 12 and 14.
- Compound A has, for example, a helical structure.
- the helical structure may be right-handed or left-handed.
- compound A having a right-handed helical structure and compound A having a left-handed helical structure may be mixed.
- the winding direction of the helical structure of compound A tends to be easily reversed in solution.
- compound A When compound A has a helical structure, a pi-stack structure is easily formed in compound A.
- n when n is 2, compound A has a tetramer structure of orthophenylene.
- two orthophenylenes positioned at the ends of compound A can form a pi-stack structure.
- n in formula (1) the larger the value of n, the greater the number of orthophenylenes that can form a pi-stack structure.
- the orthophenylene trimer structure in which n in formula (1) is 1 does not form a pi-stack structure. Therefore, the trimer structure of orthophenylene exhibits almost no nonlinear optical absorption characteristics.
- compound A represented by formula (1) examples include compound B represented by formula (2) below.
- multiple Z's are the same.
- Each of R 2 , R 3 , R 7 , R 8 , R 12 and R 13 in formula (1) corresponds to a corresponding one of Z's.
- Z is, for example, an alkoxy group such as —OCH 3 .
- multiple X's are the same.
- Each of R 5 and R 10 in formula (1) corresponds to a corresponding one of X's.
- X is, for example, a halogen group such as -Br.
- the method for synthesizing compound B represented by formula (2) is not particularly limited.
- Compound B can be synthesized, for example, using the coupling reaction described in Examples.
- the compound A represented by the formula (1) has a large ratio ⁇ / ⁇ of the two-photon absorption cross section ⁇ to the molar extinction coefficient ⁇ with respect to light having a wavelength in the short wavelength region, and has high nonlinear optical absorption characteristics. .
- the ratio ⁇ / ⁇ of Compound A to light having wavelengths in the short wavelength region tends to be greater than that of the conventional two-photon absorption compounds disclosed, for example, in Patent Documents 1-3.
- compound A when compound A is irradiated with light having a wavelength of 405 nm, compound A tends to undergo significant nonlinear light absorption.
- the longer the chain length the more the nonlinear optical absorption characteristics tend to improve.
- the recording density of a three-dimensional optical memory can be improved by using compound A with improved nonlinear light absorption characteristics.
- the two-photon absorption cross section of compound A for light with a wavelength of 405 nm may be 1 GM or more, 10 GM or more, 30 GM or more, 50 GM or more, or 70 GM. 100 GM or more, 200 GM or more, or 300 GM or more.
- the upper limit of the two-photon absorption cross section of compound A is not particularly limited, and is, for example, 10000 GM.
- the two-photon absorption cross section can be measured, for example, by the Z scan method described in J. Opt. Soc. Am. B, 2003, Vol. 20, p. 529. The Z scan method is widely used as a method for measuring nonlinear optical constants.
- the measurement sample In the Z scan method, the measurement sample is moved along the irradiation direction of the beam in the vicinity of the focal point where the laser beam is condensed. At this time, changes in the amount of light transmitted through the measurement sample are recorded.
- the power density of incident light changes according to the position of the measurement sample. Therefore, when the measurement sample performs nonlinear light absorption, the amount of transmitted light is attenuated when the measurement sample is positioned near the focal point of the laser beam.
- the two-photon absorption cross section can be calculated by fitting changes in the amount of transmitted light to a theoretical curve predicted from the intensity of incident light, the thickness of the measurement sample, the concentration of compound A in the measurement sample, and the like. .
- the molar extinction coefficient of Compound A for light having a wavelength of 405 nm may be 50 mol -1 ⁇ L ⁇ cm -1 or less, may be 10 mol -1 ⁇ L ⁇ cm -1 or less, or may be 5 mol -1 ⁇ L ⁇ cm ⁇ 1 or less, 2 mol ⁇ 1 ⁇ L ⁇ cm ⁇ 1 or less, or 1 mol ⁇ 1 ⁇ L ⁇ cm ⁇ 1 or less.
- the lower limit of the molar extinction coefficient of compound A is not particularly limited, and is, for example, 0.01 mol ⁇ 1 ⁇ L ⁇ cm ⁇ 1 .
- the molar extinction coefficient can be measured, for example, by a method conforming to the provisions of Japanese Industrial Standards (JIS) K0115:2004.
- JIS Japanese Industrial Standards
- a light source that irradiates light with a photon density at which compound A hardly causes two-photon absorption is used.
- the concentration of Compound A is adjusted to 500 mmol/L for the measurement of molar extinction coefficient. This concentration is a very high value compared with the concentration in the measurement test of the molar extinction coefficient of the light absorption peak.
- the molar extinction coefficient can be used as a measure of one-photon absorption.
- Compound A has a large ratio ⁇ / ⁇ of the two-photon absorption cross section ⁇ (GM) to the molar extinction coefficient ⁇ (mol ⁇ 1 ⁇ L ⁇ cm ⁇ 1 ) with respect to light having a wavelength in the short wavelength region.
- the ratio ⁇ / ⁇ of Compound A to light having a wavelength of 405 nm may be 20 or more, 30 or more, 50 or more, 70 or more, or 100 or more. , 150 or more, or 200 or more.
- the upper limit of the ratio ⁇ / ⁇ of compound A is not particularly limited, and is 5,000, for example.
- compound A When compound A absorbs two photons, compound A absorbs about twice the energy of the light irradiated to compound A.
- a wavelength of light having about twice the energy of light having a wavelength of 405 nm is, for example, 200 nm.
- One-photon absorption may occur in compound A when compound A is irradiated with light having a wavelength of around 200 nm.
- one-photon absorption may occur with respect to light having a wavelength in the vicinity of the wavelength region in which two-photon absorption occurs.
- Compound A also tends to have high solubility in organic solvents. This solubility is significantly improved when the winding direction of the helical structure of compound A can be easily reversed in solution.
- the solubility of Compound A in 1 mL of chloroform at 25° C. is 100 mg or more.
- the upper limit of this solubility is not particularly limited, and is, for example, 500 mg.
- Compound A, which is highly soluble in organic solvents, is easy to handle and easy to use for device applications.
- the light-absorbing material of the present embodiment may contain compound A represented by formula (1) as a main component.
- the “main component” means the component contained in the light-absorbing material in the largest amount by weight.
- the light absorbing material consists essentially of compound A, for example. "Consisting essentially of” means excluding other ingredients that modify the essential characteristics of the referenced material. However, the light absorbing material may contain impurities in addition to the compound A. Since the light-absorbing material of the present embodiment contains compound A represented by formula (1), it tends to have excellent nonlinear light-absorbing properties with respect to light having a wavelength in the short wavelength region.
- the light-absorbing material of this embodiment containing compound A functions, for example, as a two-photon absorption material.
- the light-absorbing material of this embodiment is used, for example, in a device that utilizes light having a wavelength in the short wavelength range.
- the light-absorbing material of this embodiment is used in a device that utilizes light having a wavelength of 390 nm or more and 420 nm or less.
- Such devices include recording media, modeling machines, fluorescence microscopes, and the like. Recording media include, for example, a three-dimensional optical memory. A specific example of a three-dimensional optical memory is a three-dimensional optical disk.
- modeling machines include optical modeling machines such as 3D printers. Fluorescence microscopes include, for example, two-photon fluorescence microscopes. The light utilized in these devices, for example, has a high photon density near its focal point.
- the power density near the focal point of light used in the device is, for example, 0.1 W/cm 2 or more and 1.0 ⁇ 10 20 W/cm 2 or less.
- the power density near the focal point of this light may be 1.0 W/cm 2 or more, 1.0 ⁇ 10 2 W/cm 2 or more, or 1.0 ⁇ 10 5 W/cm It may be 2 or more.
- a light source for the device for example, a femtosecond laser such as a titanium sapphire laser, or a pulsed laser having a pulse width of picoseconds to nanoseconds such as a semiconductor laser can be used.
- a recording medium for example, has a thin film called a recording layer. Information is recorded in a recording layer of a recording medium.
- a thin film as a recording layer contains the light absorbing material of this embodiment. That is, from another aspect, the present disclosure provides a recording medium comprising a light-absorbing material containing compound A described above.
- the recording layer may further contain a polymer compound that functions as a binder in addition to the light absorbing material.
- the recording medium may have a dielectric layer in addition to the recording layer.
- the recording medium comprises, for example, multiple recording layers and multiple dielectric layers. In the recording medium, a plurality of recording layers and a plurality of dielectric layers may be alternately laminated.
- FIG. 1A is a flow chart of an information recording method using the above recording medium.
- a light source that emits light having a wavelength of 390 nm or more and 420 nm or less is prepared.
- the light source for example, a femtosecond laser such as a titanium sapphire laser, or a pulse laser having a pulse width of picoseconds to nanoseconds such as a semiconductor laser can be used.
- the light from the light source is condensed by a lens or the like, and the recording layer of the recording medium is irradiated with the light.
- the light from the light source is condensed by a lens or the like, and the recording area of the recording medium is irradiated with the light.
- the power density near the focal point of this light is, for example, 0.1 W/cm 2 or more and 1.0 ⁇ 10 20 W/cm 2 or less.
- the power density near the focal point of this light may be 1.0 W/cm 2 or more, 1.0 ⁇ 10 2 W/cm 2 or more, or 1.0 ⁇ 10 5 W/cm It may be 2 or more.
- the recording area means a spot existing in the recording layer and capable of recording information by being irradiated with light.
- a physical or chemical change occurs in the recording area irradiated with the above light. For example, heat is generated when compound A that has absorbed light returns from the transition state to the ground state. This heat alters the binder present in the recording area. This changes the optical characteristics of the recording area. For example, the intensity of light reflected on the recording area, the reflectance of light on the recording area, the absorptance of light on the recording area, the refractive index of light on the recording area, etc. change. In the recording area irradiated with light, the intensity of the fluorescent light emitted from the recording area or the wavelength of the fluorescent light may change. Thereby, information can be recorded in the recording layer, more specifically, in the recording area (step S13).
- FIG. 1B is a flow chart of an information reading method using the above recording medium.
- the recording layer of the recording medium is irradiated with light. Specifically, the recording area on the recording medium is irradiated with light.
- the light used in step S21 may be the same as or different from the light used to record information on the recording medium.
- the optical properties of the recording layer are measured. Specifically, the optical characteristics of the recording area are measured. In step S22, for example, the intensity of the light reflected by the recording area is measured as the optical characteristic of the recording area.
- the optical properties of the recording area are the reflectance of light in the recording area, the absorption rate of light in the recording area, the refractive index of light in the recording area, the intensity of fluorescent light emitted from the recording area, The wavelength of fluorescence light may be measured.
- step S23 information is read from the recording layer, more specifically, from the recording area.
- the recording area where the information is recorded can be searched by the following method.
- a specific area of the recording medium is irradiated with light. This light may be the same as or different from the light used to record information on the recording medium.
- the optical properties of the region irradiated with light are measured. Optical properties include, for example, the intensity of light reflected at the region, the reflectance of light at the region, the absorption rate of light at the region, the refractive index of light at the region, and the fluorescence emitted from the region. and the wavelength of fluorescent light emitted from the region. Based on the measured optical characteristics, it is determined whether or not the area irradiated with light is a recording area.
- the intensity of the light reflected by the area is less than or equal to a specific value, it is determined that the area is a recording area.
- the intensity of the light reflected by the area exceeds a specific value, it is determined that the area is not a recording area.
- the method for determining whether or not the area irradiated with light is a recording area is not limited to the above method. For example, if the intensity of light reflected by the area exceeds a specific value, it may be determined that the area is a recording area. Alternatively, if the intensity of the light reflected by the area is less than or equal to a specific value, it may be determined that the area is not a recording area. If it is determined that the area is not a recording area, the same operation is performed on another area of the recording medium. This makes it possible to search for a recording area.
- a recording apparatus includes, for example, a light source that irradiates a recording area on a recording medium with light, a measuring device that measures optical characteristics of the recording region, and a controller that controls the light source and the measuring device.
- a modeling machine performs modeling by, for example, irradiating a photocurable resin composition with light and curing the resin composition.
- a photocurable resin composition for stereolithography contains the light absorbing material of the present embodiment.
- the photocurable resin composition contains, for example, a polymerizable compound and a polymerization initiator in addition to the light absorbing material.
- the photocurable resin composition may further contain additives such as a binder resin.
- the photocurable resin composition may contain an epoxy resin.
- a fluorescence microscope for example, it is possible to irradiate a biological sample containing a fluorescent dye material with light and observe the fluorescence emitted from the dye material.
- a fluorescent dye material to be added to a biological sample contains the light absorbing material of this embodiment.
- Compound OP4Br was identified by 1 H-NMR and mass spectrometry.
- 2A is a graph showing the 1 H-NMR spectrum of compound OP4Br of Example 1.
- FIG. 2B is an enlarged view of the graph of FIG. 2A.
- the 1 H-NMR spectrum of compound OP4Br and the results of mass spectrometry by a high-resolution mass spectrometer (HRMS) using electrospray ionization-time-of-flight mass spectrometry were as follows. From the 1 H-NMR spectrum, it can be read that the peak derived from the hydrogen atoms bonded to the benzene ring is shifted to the high magnetic field. This result shows that the compound OP4Br has a helical structure.
- Example 2 (Synthesis of compound OP8Br) First, a tetrahydrofuran solution (42 mL) containing the compound OP4Br (1.01 g, 1.4 mmol) synthesized in Example 1 was prepared under an argon atmosphere. Next, 2.2 mmol of a 1.58 mol/L n-butyllithium hexane solution was added to this solution, and the mixture was stirred at -78°C for 30 minutes. Next, copper cyanide powder (64.6 mg, 0.72 mmol) was added to the reaction solution and stirred at room temperature for 2 hours.
- Compound OP8Br was identified by 1 H-NMR.
- 3A is a graph showing the 1 H-NMR spectrum of compound OP8Br of Example 2.
- FIG. 3B is an enlarged view of the graph of FIG. 3A.
- the 1 H-NMR spectrum of compound OP8Br was as follows. As in Example 1, the 1 H-NMR spectrum results show that the compound OP8Br has a helical structure.
- Compound OP12Br was identified by 1 H-NMR.
- 4A is a graph showing the 1 H-NMR spectrum of compound OP12Br of Example 3.
- FIG. 4B is an enlarged view of the graph of FIG. 4A.
- the 1 H-NMR spectrum of compound OP12Br was as follows. As in Example 1, the 1 H-NMR spectrum results show that the compound OP12Br has a helical structure.
- Compound OP14Br was identified by 1 H-NMR.
- 5A is a graph showing the 1 H-NMR spectrum of compound OP14Br of Example 4.
- FIG. 5B is an enlarged view of the graph of FIG. 5A.
- the 1 H-NMR spectrum of compound OP14Br was as follows. As in Example 1, the 1 H-NMR spectrum results show that the compound OP14Br has a helical structure.
- Example 5 (Synthesis of compound OP16Br) First, a tetrahydrofuran solution (60 mL) containing the compound OP8Br (1.0 g, 0.80 mmol) synthesized in Example 2 was prepared under an argon atmosphere. Next, 3.2 mmol of a 1.8 mol/L t-butyllithium hexane solution was added to this solution, and the mixture was stirred at -78°C for 10 minutes. The solution was further stirred at -40°C for 15 minutes and then cooled to -78°C again. Next, copper cyanide powder (72 mg, 0.8 mmol) was added to the resulting reaction solution, and the mixture was stirred at room temperature for 1.5 hours.
- Compound OP16Br was identified by 1 H-NMR and mass spectrometry.
- 6A is a graph showing the 1 H-NMR spectrum of compound OP16Br of Example 5.
- FIG. 6B is an enlarged view of the graph of FIG. 6A.
- the 1 H-NMR spectrum of compound OP16Br and the results of mass spectrometry by a high-resolution mass spectrometer (HRMS) using electrospray ionization-time-of-flight mass spectrometry were as follows. As in Example 1, the 1 H-NMR spectrum results show that the compound OP16Br has a helical structure.
- HRMS high-resolution mass spectrometer
- two-photon absorption cross-sections were measured for light having a wavelength of 405 nm.
- Two-photon absorption cross sections were measured using the Z scan method described in J. Opt. Soc. Am. B, 2003, Vol. 20, p.
- a titanium sapphire pulsed laser was used as a light source for measuring the two-photon absorption cross section.
- the sample was irradiated with the second harmonic of a titanium sapphire pulsed laser.
- the pulse width of the laser was 80 fs.
- the laser repetition frequency was 1 kHz.
- the average laser power was varied in the range of 0.01 mW to 0.08 mW.
- the light from the laser was light with a wavelength of 405 nm.
- the light from the laser had a center wavelength between 402 nm and 404 nm.
- the full width at half maximum of the light from the laser was 4 nm.
- ⁇ Measurement of molar extinction coefficient> The molar extinction coefficients of the compounds of Examples and Comparative Examples were measured by a method conforming to JIS K0115:2004. Specifically, first, a measurement sample with a compound concentration adjusted to 500 mmol/L was prepared. An absorption spectrum was measured for the measurement sample. The absorbance at a wavelength of 405 nm was read from the resulting spectrum. The molar extinction coefficient was calculated based on the concentration of the compound in the measurement sample and the optical path length of the cell used for measurement.
- Table 1 shows the two-photon absorption cross section ⁇ (GM), the molar extinction coefficient ⁇ (mol ⁇ 1 ⁇ L ⁇ cm ⁇ 1 ) and the ratio ⁇ / ⁇ obtained by the above method.
- the chemical structure of the through-space type pi-conjugated compound of the present disclosure corresponds to compound A represented by formula (1). Since the through-space type pi-conjugated compound has a helical structure twisted at a steep angle, even if the chain length is extended, the light absorption wavelength does not shift to a longer wavelength, and an increase in the molar extinction coefficient ⁇ can be suppressed. It is possible. That is, the extension of the chain length of the through-space type pi-conjugated compound improves the nonlinear optical absorption characteristics of the through-space type pi-conjugated compound.
- n in formula (1) must be an integer of 2 or greater. That is, compound A must be an orthophenylene tetramer or higher polymer.
- the light-absorbing material of the present disclosure can be used for applications such as recording layers of three-dimensional optical memories and photo-curable resin compositions for stereolithography.
- the light-absorbing material of the present disclosure has light-absorbing properties exhibiting high nonlinearity with respect to light having wavelengths in the short wavelength range. Therefore, the light-absorbing material of the present disclosure can achieve extremely high spatial resolution in applications such as three-dimensional optical memory and modeling machines. According to the light-absorbing material of the present disclosure, compared to conventional light-absorbing materials, it is possible to cause two-photon absorption more favorably than one-photon absorption even when irradiated with a laser beam of low light intensity.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
有機非線形光学材料では、二光子吸収材料が特に注目を集めている。二光子吸収とは、化合物が二つの光子をほとんど同時に吸収して励起状態へ遷移する現象を意味する。二光子吸収としては、非共鳴二光子吸収及び共鳴二光子吸収が知られている。非共鳴二光子吸収は、一光子の吸収帯が存在しない波長域での二光子吸収を意味する。非共鳴二光子吸収では、化合物は、2つの光子をほとんど同時に吸収し、高次の励起状態に遷移する。共鳴二光子吸収では、化合物が1つ目の光子を吸収してから、2つ目の光子をさらに吸収することによって、より高次の励起状態に遷移する。共鳴二光子吸収では、化合物は、2つの光子を逐次的に吸収する。
本開示の第1態様にかかる光吸収材料は、
下記式(1)で表される化合物を主成分として含む。
第1から第10態様のいずれか1つにかかる光吸収材料を含む記録層を備える。
390nm以上420nm以下の波長を有する光を発する光源を準備することと、
前記光源からの前記光を集光して、第11態様にかかる記録媒体における前記記録層に照射することと、を含む。
前記読出方法は、
前記記録層に対して光を照射することによって、前記記録層の光学特性を測定することと、
前記記録層から前記情報を読み出すことと、を含む。
(化合物OP4Brの合成)
まず、アルゴン雰囲気下で、2,2’-ジブロモ-4,4’,5,5’-テトラメトキシビフェニルを含むテトラヒドロフラン溶液を調製した。次に、この溶液に、1.57mol/Lのn-ブチルリチウムヘキサン溶液を28mmol加えて、-78℃で30分間攪拌した。次に、この反応溶液にシアン化銅の粉末(1.04g、12mmol)を加えて、室温で2時間攪拌した。次に、この反応溶液にデュロキノンの粉末(5.70g、35mmol)を加えて、室温で1.5時間攪拌した。これにより、2,2’-ジブロモ-4,4’,5,5’-テトラメトキシビフェニルのカップリング反応が進行した。次に、この反応溶液をアンモニア水溶液に注いでから、酢酸エチルを用いて有機層を抽出した。抽出した有機層を飽和塩化アンモニウム水溶液及び水で洗浄し、硫酸マグネシウムを用いて乾燥させた。乾燥後、酢酸エチルを真空蒸留により留去した。得られた粗生成物をカラムクロマトグラフィーで精製することによって、実施例1の化合物OP4Brを合成した。化合物OP4Brは、以下の式(3)で表される。
1H NMR (600MHz, CD3CN): δ(ppm) 7.15-6.73 (m, 6H), 6.43 (br. 2H), 3.78 (s. 6H), 3.74 (br. 12H), 3.51 (s. 6H). HRMS (ESI-TOF mass): calcd. for C32H32Br2O8[M]+: m/z=704.04; found: 704.00.
(化合物OP8Brの合成)
まず、アルゴン雰囲気下で、実施例1で合成した化合物OP4Br(1.01g、1.4mmol)を含むテトラヒドロフラン溶液(42mL)を調製した。次に、この溶液に、1.58mol/Lのn-ブチルリチウムヘキサン溶液を2.2mmol加えて、-78℃で30分間攪拌した。次に、この反応溶液にシアン化銅の粉末(64.6mg、0.72mmol)を加えて、室温で2時間攪拌した。次に、この反応溶液にデュロキノンの粉末(356mg、2.2mmol)を加えて、室温で1.5時間攪拌した。これにより、化合物OP4Brのカップリング反応が進行した。次に、この反応溶液をアンモニア水溶液に注いでから、酢酸エチルを用いて有機層を抽出した。抽出した有機層を飽和塩化アンモニウム水溶液及び水で洗浄し、無水硫酸マグネシウムを用いて乾燥させた。乾燥後、酢酸エチルを真空蒸留により留去した。得られた粗生成物をカラムクロマトグラフィーで精製することによって、実施例2の化合物OP8Brを合成した。化合物OP8Brは、以下の式(4)で表される。
1H NMR (600MHz, CD3CN): δ(ppm) 6.73 (s, 2H), 6.72 (s, 2H), 6.48 (s, 2H), 5.90 (s, 2H), 5.89 (s, 2H), 5.83 (s, 2H), 5.77 (s, 2H), 5.34 (s, 2H), 3.73 (s, 6H), 3.71 (s, 6H), 3.70 (s, 6H), 3.55 (s, 6H), 3.54 (s, 6H), 3.48 (s, 6H), 3.46 (s, 6H), 3.09 (s, 6H).
1H NMR (600MHz, CD3CN): δ(ppm) 6.64 (s, 2H), 6.64 (s, 2H), 6.37 (s, 2H), 5.83 (s, 2H), 5.76 (s, 2H), 5.74 (s, 2H), 5.55 (s, 2H), 5.53 (s, 2H), 5.51 (s, 2H), 5.50 (s, 2H), 5.40 (s, 2H), 5.14 (s, 2H), 3.68 (s, 6H), 3.66 (s, 6H), 3.65 (s, 6H), 3.50 (s, 6H), 3.47 (s, 6H), 3.43 (s, 6H), 3.43 (s, 6H), 3.42 (s, 6H), 3.40 (s,6H), 3.39 (s, 6H), 3.38 (s, 6H).
1H NMR (600MHz, CD3CN): δ(ppm) 6.63 (s, 2H), 6.62 (s, 2H), 6.36 (s, 2H), 5.85 (s, 2H), 5.74 (s, 2H), 5.69 (s, 2H), 5.54 (s, 2H), 5.50 (s, 2H), 5.46 (s, 2H), 5.45 (s, 2H), 5.42 (s, 2H), 5.37 (s,2H), 5.35 (s, 2H), 5.12 (s, 2H), 3.67 (s, 6H), 3.65 (s, 6H), 3.64 (s, 6H), 3.48 (s, 6H), 3.47 (s, 6H), 3.42 (s, 6H), 3.41 (s, 6H), 3.40 (s, 6H), 3.39 (s, 6H), 3.369 (s, 12H), 3.365 (s, 12H), 3.02 (s, 6H).
(化合物OP16Brの合成)
まず、アルゴン雰囲気下で、実施例2で合成した化合物OP8Br(1.0g、0.80mmol)を含むテトラヒドロフラン溶液(60mL)を調製した。次に、この溶液に、1.8mol/Lのt-ブチルリチウムヘキサン溶液を3.2mmol加えて、-78℃で10分間攪拌した。さらに、この溶液を-40℃で15分間攪拌してから、再度-78℃に冷却した。次に、得られた反応溶液にシアン化銅の粉末(72mg、0.8mmol)を加えて、室温で1.5時間攪拌した。次に、この反応溶液にデュロキノンの粉末(200mg、1.2mmol)を加えて、室温で12時間攪拌した。これにより、化合物OP8Brのカップリング反応が進行した。次に、この反応溶液をアンモニア水溶液に注いでから、酢酸エチルを用いて有機層を抽出した。抽出した有機層を飽和塩化アンモニウム水溶液及び水で洗浄し、無水硫酸マグネシウムを用いて乾燥させた。乾燥後、酢酸エチルを真空蒸留により留去した。得られた粗生成物をカラムクロマトグラフィーで精製することによって、実施例5の化合物OP16Brを合成した。化合物OP16Brは、以下の式(9)で表される。
1H NMR (600MHz, CD3CN): δ(ppm) 6.624 (s, 2H), 6.616 (s, 2H), 6.36 (s, 2H), 5.84(s, 2H), 5.73 (s, 2H), 5.68 (s, 2H), 5.52 (s, 2H), 5.48 (s, 2H), 5.45 (s, 2H), 5.43 (s, 2H), 5.37 (s, 2H), 5.36 (s, 2H), 5.33 (s, 2H), 5.32 (s, 2H), 5.30 (s, 2H), 5.10 (s, 2H), 3.67 (s, 6H), 3.64 (s, 6H), 3.63 (s, 6H), 3.47 (s, 6H), 3.45 (s, 6H), 3.401 (s, 6H), 3.398 (s, 6H), 3.39 (s, 6H), 3.37 (s, 6H), 3.36 (s, 6H), 3.354 (s, 12H), 3.349 (s, 6H), 3.341 (s, 6H), 3.337 (s, 6H), 3.02 (s, 6H). HRMS (ESI-TOF mass): calcd. for C128H128Br2O32 [M]+: m/z=2334.68; found: 2335.12.
下記式(10)に示す、比較例1の化合物であるヘキサキス(フェニルエチニル)ベンゼン(HPEB)は、K. Kondo et al., J. Chem. Soc., Chem. Commun. 1995, 55-56、及びW. Tao, et al., J. Org. Chem. 1990, 55, 63-66に記載の方法に準じて合成したものを使用した。また、下記式(11)に示す、比較例2の化合物である化合物1fは、特許文献2の段落[0083]に開示された方法に準じて合成したものを使用した。
実施例及び比較例の化合物について、405nmの波長を有する光に対する二光子吸収断面積の測定を行った。二光子吸収断面積の測定は、J. Opt. Soc. Am. B, 2003, Vol. 20, p. 529.に記載されたZスキャン法を用いて行った。二光子吸収断面積を測定するための光源としては、チタンサファイアパルスレーザーを用いた。詳細には、チタンサファイアパルスレーザーの第二高調波を試料に照射した。レーザーのパルス幅は、80fsであった。レーザーの繰り返し周波数は、1kHzであった。レーザーの平均パワーは、0.01mW以上0.08mW以下の範囲で変化させた。レーザーからの光は、405nmの波長を有する光であった。詳細には、レーザーからの光は、402nm以上404nm以下の中心波長を有していた。レーザーからの光の半値全幅は、4nmであった。
実施例及び比較例の化合物について、JIS K0115:2004の規定に準拠した方法でモル吸光係数を測定した。詳細には、まず、化合物の濃度が500mmol/Lに調整された測定試料を準備した。測定試料について、吸収スペクトルを測定した。得られたスペクトルから、405nmの波長での吸光度を読み取った。測定試料における化合物の濃度、及び、測定に用いたセルの光路長に基づいて、モル吸光係数を算出した。
Claims (14)
- 前記R1から前記R14は、互いに独立して、水素原子、ハロゲン原子、飽和炭化水素基、ハロゲン化アルキル基、不飽和炭化水素基、ヒドロキシル基、カルボキシル基、アルコキシカルボニル基、アルデヒド基、アシル基、アミド基、ニトリル基、アルコキシ基、アシルオキシ基、チオール基、アルキルチオ基、スルホン酸基、アシルチオ基、アルキルスルホニル基、スルホンアミド基、1級アミノ基、2級アミノ基、3級アミノ基又はニトロ基である、
請求項1に記載の光吸収材料。 - 前記R2、前記R3、前記R7、前記R8、前記R12及び前記R13からなる群より選ばれる少なくとも1つは、電子供与基である、
請求項1又は2に記載の光吸収材料。 - 前記電子供与基は、アルコキシ基である、
請求項3に記載の光吸収材料。 - 前記電子供与基は、-OCH3である、
請求項3又は4に記載の光吸収材料。 - 前記R5及び前記R10からなる群より選ばれる少なくとも1つは、電子求引基である、
請求項1から5のいずれか1項に記載の光吸収材料。 - 前記電子求引基は、ハロゲン基である、
請求項6に記載の光吸収材料。 - 前記化合物は、らせん構造を有する、
請求項1から7のいずれか1項に記載の光吸収材料。 - 前記化合物は、特定の光を吸収する特性を有する、
請求項1から8のいずれか1項に記載の光吸収材料。 - 390nm以上420nm以下の波長を有する光を利用するデバイスに用いられる、
請求項1から9のいずれか1項に記載の光吸収材料。 - 請求項1から10のいずれか1項に記載の光吸収材料を含む記録層を備える、
記録媒体。 - 390nm以上420nm以下の波長を有する光を発する光源を準備することと、
前記光源からの前記光を集光して、請求項11に記載の記録媒体における前記記録層に照射することと、を含む、
情報の記録方法。 - 請求項12に記載の記録方法によって記録された情報の読出方法であって、
前記読出方法は、
前記記録層に対して光を照射することによって、前記記録層の光学特性を測定することと、
前記記録層から前記情報を読み出すことと、を含む、
情報の読出方法。 - 前記光学特性は、前記記録層で反射した光の強度である、
請求項13に記載の読出方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280034368.2A CN117321686A (zh) | 2021-05-18 | 2022-04-28 | 光吸收材料、记录介质、信息的记录方法及信息的读出方法 |
JP2023522592A JPWO2022244611A1 (ja) | 2021-05-18 | 2022-04-28 | |
US18/493,204 US20240069408A1 (en) | 2021-05-18 | 2023-10-24 | Light absorption material, recording medium, information recording method, and information reading method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021084185 | 2021-05-18 | ||
JP2021-084185 | 2021-05-18 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/493,204 Continuation US20240069408A1 (en) | 2021-05-18 | 2023-10-24 | Light absorption material, recording medium, information recording method, and information reading method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022244611A1 true WO2022244611A1 (ja) | 2022-11-24 |
Family
ID=84140579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/019226 WO2022244611A1 (ja) | 2021-05-18 | 2022-04-28 | 光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20240069408A1 (ja) |
JP (1) | JPWO2022244611A1 (ja) |
CN (1) | CN117321686A (ja) |
WO (1) | WO2022244611A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012157549A1 (ja) * | 2011-05-13 | 2012-11-22 | 富士フイルム株式会社 | 非共鳴2光子吸収材料、非共鳴2光子吸収記録材料、記録媒体、記録再生方法及び非共鳴2光子吸収化合物 |
JP5388026B2 (ja) * | 2008-12-15 | 2014-01-15 | 国立大学法人九州大学 | 機能性色素を含有する光学材料 |
JP5769151B2 (ja) * | 2011-11-15 | 2015-08-26 | 国立研究開発法人産業技術総合研究所 | 二光子吸収材料及びその利用 |
-
2022
- 2022-04-28 JP JP2023522592A patent/JPWO2022244611A1/ja active Pending
- 2022-04-28 CN CN202280034368.2A patent/CN117321686A/zh active Pending
- 2022-04-28 WO PCT/JP2022/019226 patent/WO2022244611A1/ja active Application Filing
-
2023
- 2023-10-24 US US18/493,204 patent/US20240069408A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5388026B2 (ja) * | 2008-12-15 | 2014-01-15 | 国立大学法人九州大学 | 機能性色素を含有する光学材料 |
WO2012157549A1 (ja) * | 2011-05-13 | 2012-11-22 | 富士フイルム株式会社 | 非共鳴2光子吸収材料、非共鳴2光子吸収記録材料、記録媒体、記録再生方法及び非共鳴2光子吸収化合物 |
JP5769151B2 (ja) * | 2011-11-15 | 2015-08-26 | 国立研究開発法人産業技術総合研究所 | 二光子吸収材料及びその利用 |
Non-Patent Citations (2)
Title |
---|
MARQUÉS-GONZÁLEZ SANTIAGO, FUJII SHINTARO, NISHINO TOMOAKI, SHOJI YOSHIAKI, ISHIWARI FUMITAKA, FUKUSHIMA TAKANORI, KIGUCHI MANABU: "Scanning tunnelling microscopy analysis of octameric o-phenylenes on Au(111)", RSC ADVANCES, vol. 6, no. 61, 1 January 2016 (2016-01-01), pages 55970 - 55975, XP093005945, DOI: 10.1039/C6RA07173B * |
MATHEW SANYO M., ENGLE JAMES T., ZIEGLER CHRISTOPHER J., HARTLEY C. SCOTT: "The Role of Arene–Arene Interactions in the Folding of ortho -Phenylenes", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, AMERICAN CHEMICAL SOCIETY, vol. 135, no. 17, 1 May 2013 (2013-05-01), pages 6714 - 6722, XP093005955, ISSN: 0002-7863, DOI: 10.1021/ja4026006 * |
Also Published As
Publication number | Publication date |
---|---|
CN117321686A (zh) | 2023-12-29 |
JPWO2022244611A1 (ja) | 2022-11-24 |
US20240069408A1 (en) | 2024-02-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Iwase et al. | Synthesis and photophysical properties of new two-photon absorption chromophores containing a diacetylene moiety as the central π-bridge | |
Ren et al. | Synthesis, structures and two-photon pumped up-conversion lasing properties of two new organic salts | |
US20230109287A1 (en) | Compound, non-linear optical material, recording medium, method for recording information, and method for reading information | |
Wang et al. | Two-photon absorption and two-photon excited fluorescence of triphenylamine-based multibranched chromophores | |
WO2022244611A1 (ja) | 光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
JP2022177737A (ja) | 非線形吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
WO2022244431A1 (ja) | 非線形光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
JP6994666B1 (ja) | 非線形光学材料、光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
JP7390676B1 (ja) | 非線形光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
WO2022149462A1 (ja) | 光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
JP6994667B1 (ja) | 非線形光学材料、光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
CN115210336B (zh) | 光吸收材料、使用了该光吸收材料的记录介质、信息的记录方法及信息的读出方法 | |
WO2022149461A1 (ja) | 非線形光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
WO2022244430A1 (ja) | 非線形光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
Tian et al. | Synthesis and two-photon optical characterization of D–π–D type Schiff bases | |
WO2022149459A1 (ja) | 非線形光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
WO2022149460A1 (ja) | 光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
WO2022244429A1 (ja) | 非線形光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
WO2023223693A1 (ja) | 記録媒体、情報の記録方法及び情報の読出方法 | |
WO2023140012A1 (ja) | 化合物、光吸収材料、非線形光吸収材料、記録媒体、情報の記録方法及び情報の読出方法 | |
Bu et al. | Crystallographic structure and solid-state fluorescence enhancement behavior of a 2-(9-anthryl) phenanthroimidazole-type clathrate host upon inclusion of amine molecules | |
Hu et al. | Three asymmetrical conjugated D-π-D′ sulfur-containing chromophores with a focus on two-photon absorption | |
Yan et al. | Synthesis, structure and nonlinear optical properties of a two-photon photopolymerization initiator | |
WO1989001181A1 (en) | Nonlinear optical material | |
Xia et al. | Synthesis, as well as linear and nonlinear fluorescence properties of 5, 5’-bis (4-N-carbazolylstyryl)-2, 2’-bithiophene |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22804525 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2023522592 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280034368.2 Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 22804525 Country of ref document: EP Kind code of ref document: A1 |