CN108586387A - 一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物及其制备方法 - Google Patents
一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物及其制备方法 Download PDFInfo
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- OBISXEJSEGNNKL-UHFFFAOYSA-N dinitrogen-n-sulfide Chemical class [N-]=[N+]=S OBISXEJSEGNNKL-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 title claims abstract description 24
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 title claims abstract description 23
- 230000000903 blocking effect Effects 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000006069 Suzuki reaction reaction Methods 0.000 claims abstract description 12
- 230000007062 hydrolysis Effects 0.000 claims abstract description 8
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 8
- 125000003983 fluorenyl group Chemical class C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 claims abstract 3
- 150000002148 esters Chemical class 0.000 claims abstract 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 28
- -1 4- methoxycarbonyl phenyl boric acid pinacols Chemical class 0.000 claims description 16
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 15
- IVDFJHOHABJVEH-UHFFFAOYSA-N HOCMe2CMe2OH Natural products CC(C)(O)C(C)(C)O IVDFJHOHABJVEH-UHFFFAOYSA-N 0.000 claims description 11
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 claims description 10
- 229910052796 boron Inorganic materials 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- 235000019441 ethanol Nutrition 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims description 2
- 239000012429 reaction media Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- 238000010189 synthetic method Methods 0.000 abstract description 14
- 125000005259 triarylamine group Chemical group 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 abstract 1
- 125000000950 dibromo group Chemical group Br* 0.000 abstract 1
- 239000000975 dye Substances 0.000 description 28
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 20
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- 238000003786 synthesis reaction Methods 0.000 description 20
- 239000007787 solid Substances 0.000 description 16
- 239000000243 solution Substances 0.000 description 15
- 238000005160 1H NMR spectroscopy Methods 0.000 description 12
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 12
- YMWUJEATGCHHMB-UHFFFAOYSA-N methylene chloride Substances ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 10
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- 150000002220 fluorenes Chemical class 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 6
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 6
- 238000009833 condensation Methods 0.000 description 5
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- 238000001228 spectrum Methods 0.000 description 5
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
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- 0 CC(*)(c1c2)c(cc(cc3)Br)c3-c1ccc2N(c(cc1)ccc1OC)c(cc1)ccc1OC Chemical compound CC(*)(c1c2)c(cc(cc3)Br)c3-c1ccc2N(c(cc1)ccc1OC)c(cc1)ccc1OC 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000000862 absorption spectrum Methods 0.000 description 3
- 230000035508 accumulation Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
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- 230000033116 oxidation-reduction process Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- KZPYGQFFRCFCPP-UHFFFAOYSA-N 1,1'-bis(diphenylphosphino)ferrocene Chemical compound [Fe+2].C1=CC=C[C-]1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=C[C-]1P(C=1C=CC=CC=1)C1=CC=CC=C1 KZPYGQFFRCFCPP-UHFFFAOYSA-N 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002189 fluorescence spectrum Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- VESUQQMMANJPSV-UHFFFAOYSA-N 1,2-dibromo-9-butylcarbazole Chemical class CCCCn1c2ccccc2c2ccc(Br)c(Br)c12 VESUQQMMANJPSV-UHFFFAOYSA-N 0.000 description 1
- FGJQIUMIEAWVML-UHFFFAOYSA-N 2,7-dibromo-9,9-dibutylfluorene Chemical class C1=C(Br)C=C2C(CCCC)(CCCC)C3=CC(Br)=CC=C3C2=C1 FGJQIUMIEAWVML-UHFFFAOYSA-N 0.000 description 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 238000004847 absorption spectroscopy Methods 0.000 description 1
- NDQKGYXNMLOECO-UHFFFAOYSA-N acetic acid;potassium Chemical compound [K].CC(O)=O NDQKGYXNMLOECO-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 125000005605 benzo group Chemical group 0.000 description 1
- 229940049706 benzodiazepine Drugs 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 125000005842 heteroatom Chemical group 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- HXITXNWTGFUOAU-UHFFFAOYSA-N phenylboronic acid Chemical compound OB(O)C1=CC=CC=C1 HXITXNWTGFUOAU-UHFFFAOYSA-N 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical class C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D285/00—Heterocyclic compounds containing rings having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by groups C07D275/00 - C07D283/00
- C07D285/01—Five-membered rings
- C07D285/02—Thiadiazoles; Hydrogenated thiadiazoles
- C07D285/14—Thiadiazoles; Hydrogenated thiadiazoles condensed with carbocyclic rings or ring systems
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Abstract
本发明公开了一种基于苯基桥联和羧基封端的D‑A‑π‑A型苯并噻二唑衍生物及其制备方法。该类衍生物是先在4,7‑二溴‑2,1,3‑苯并噻二唑的7‑位上通过Suzuki偶联反应连接4‑羧基苯,然后在4‑位上与制备的含芴、咔唑、吩噻嗪的三芳胺硼酸酯衍生物依次通过Suzuki偶联反应和水解反应得到新型基于苯基桥联和羧基封端的D‑A‑π‑A型苯并噻二唑衍生物,其具有通式I的结构。该类基于苯基桥联和羧基封端的D‑A‑π‑A型苯并噻二唑衍生物合成方法简单,反应条件易于控制,产率较高,具有普遍适用性,可以高效合成并被广泛应用于染料敏化太阳能电池材料领域。
Description
技术领域:
本发明涉及苯并噻二唑衍生物领域,具体的涉及一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物,该类衍生物在发光、有机太阳能电池和材料探测识别等领域有着广泛的应用,尤其适合作为染料敏化太阳能电池材料等。
背景技术:
自1991年染料敏化太阳能电池(DSSCs)取得重大突破以来,苯并噻二唑因具有一定的刚性平面结构、较强的吸电子能力、良好的载流子传输特性和较好的空气稳定性等优点,在DSSCs领域受到广泛的应用。在染料领域中,苯并噻二唑因为带隙窄,常被用来优化能级,将其与电子给体相结合,形成给体-受体(D-A)共轭结构,以获得窄带隙、宽吸收的电池材料。芴、咔唑、吩噻嗪和三芳胺衍生物因为化学性质稳定、给电子能力强、空穴传输率高,常被用作给体单元,同受体单元结合构建多种类型的染料分子。三芳胺衍生物中苯环的扩展是一种改善染料性能的有效策略。三芳胺衍生物中大的芳基取代基一方面可以改变溶解性,增强给体的供电性;另一方面可以增加给体部分的位阻,促进染料再生,限制电荷重组,进而改善染料整体性能。因此,通过构建以三芳胺衍生物为给体单元,以苯并噻二唑为额外辅助受体单元,以苯基为π桥,以羧基为锚定基团的苯并噻二唑类染料,可以拓宽分子的共轭长度,扩大光谱吸收范围,改善染料分子的光电性能。这类分子的构建将为以后进一步设计出更加高效、性能优异的苯并噻二唑类材料打下良好的基础。
本发明设计合成了一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物,并对该类衍生物的合成方法进行了优化,提高了该类苯并噻二唑衍生物的合成产率,并研究了它们的光物理性质、电化学性质、热稳定性质、光伏性质及电化学阻抗等性质,揭示了这类分子结构与性质之间的关系,为构建染料敏化太阳能电池材料提供了新的思路。
发明内容:
本发明的目的在于从结构设计的角度出发,以苯基为π桥,羧基为封端基团,含芴、咔唑和吩噻嗪的三芳胺衍生物为给体单元,苯并噻二唑为额外辅助受体单元,设计合成出一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物,制得的目标分子结构新颖,具有优良的光电性能。
本发明的另一个目的是提供一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物的制备方法。
为实现上述目的,本发明采用以下技术方案:
一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物,该化合物具有通式I的结构:
其中,D是给体单元,具体为以下几种结构单元:
n为1-20的自然数。
一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物的制备方法,包括以下步骤:
(1)在碱和催化剂的条件下,4,7-二溴-2,1,3-苯并噻二唑与4-甲氧甲酰苯硼酸频哪醇酯经Suzuki偶联反应制得中间体1,其结构为:
(2)2,7-二溴-9,9-二烷基芴与4,4'-二甲氧基二苯胺经Buchwald偶联反应制得中间体2,其结构为:
(3)2,7-二溴-N-烷基咔唑与4,4'-二甲氧基二苯胺经Buchwald偶联反应制得中间体3,其结构为:
(4)3,7-二溴-N-烷基吩噻嗪与4,4'-二甲氧基二苯胺经Buchwald偶联反应制得中间体4,其结构为:
(5)中间体2与双联频哪醇硼酯经反应制得中间体5,其结构为:
(6)中间体3与双联频哪醇硼酯经反应制得中间体6,其结构为:
(7)中间体4与双联频哪醇硼酯经反应制得中间体7,其结构为:
(8)中间体1与中间体5经Suzuki偶联反应制得中间体8,其结构为:
(9)中间体1与中间体6经Suzuki偶联反应制得中间体9,其结构为:
(10)中间体1与中间体7经Suzuki偶联反应制得中间体10,其结构为:
(11)中间体8经水解反应,得到目标分子BT1,其结构为:
(12)中间体9经水解反应,得到目标分子BT2,其结构为:
(13)中间体10经水解反应,得到目标分子BT3,其结构为:
作为上述技术方案的优选,步骤(1)~(13)中,反应的反应介质为甲苯、乙醇、1,4-二氧六环、四氢呋喃、水中的一种或几种混合。
作为上述技术方案的优选,步骤(1)~(10)中,反应所用的催化剂为四(三苯基膦)钯、1,1'-双二苯基膦二茂铁二氯化钯、四丁基溴化铵中的一种或几种混合。
作为上述技术方案的优选,步骤(1)中,4,7-二溴-2,1,3-苯并噻二唑与4-甲氧甲酰苯硼酸频哪醇酯的摩尔比为1:1~1:2。
作为上述技术方案的优选,步骤(2)、(3)、(4)中,反应所用的碱为叔丁醇钠。
作为上述技术方案的优选,步骤(2)、(3)、(4)中2,7-二溴-9,9-二烷基芴、2,7-二溴-N-烷基咔唑、3,7-二溴-N-烷基吩噻嗪与4,4'-二甲氧基二苯胺和叔丁醇钠的摩尔比均为(2~4):1:(2~3)。
作为上述技术方案的优选,步骤(5)、(6)、(7)中的中间体5、中间体6、中间体7与双联频哪醇硼酯的摩尔比均为(1.1~2):1。
作为上述技术方案的优选,步骤(8)、(9)、(10)中的中间体8、中间体9、中间体10与中间体1的摩尔比均为1:(1.1~2)。
作为上述技术方案的优选,步骤(1)~(13)中,所述反应的反应温度为80~110℃,所述反应的反应时间为12~24h。
本发明具有以下有益效果:
(1)本发明通过Suzuki偶联反应合成重要中间体1,Buchwald偶联反应得到重要中间体2、3和4,最后再利用中间体1与多种由中间体2、3和4制备的带硼酸酯基的修饰基团进行Suzuki偶联反应,水解后得到以含芴、咔唑和吩噻嗪的三芳胺衍生物为给体单元,BT为额外辅助受体单元的目标染料分子;
(2)本发明提供的合成方法反应温和、易于控制,且合成成本低;
(3)通过对本发明制得的BT衍生物的光谱和电化学数据分析,可以看出:该类衍生物具有稳定的光谱吸收,π-π堆积现象明显,斯托克斯位移明显,电化学结果表明:染料BT1、BT2、BT3均满足染料再生和激发态电子有效注入TiO2导带的条件,适合应用于染料敏化太阳能电池给体材料;
(4)通过对本发明制得的BT衍生物的热稳定性质数据分析,我们可以看出该类衍生物具有良好的热稳定性;
(5)通过对本发明制得的BT衍生物的电化学阻抗性质数据和光伏性质(IPCE)数据综合分析,结果表明染料BT1、BT2、BT3具有良好的光电性能。
附图说明:
图1是BT 1的核磁氢谱图。
图2是BT 2的核磁氢谱图。
图3是BT 3的核磁氢谱图。
图4是BT1的质谱图。
图5是BT 2的质谱图。
图6是BT 3的质谱图。
图7是BT 1的红外(IR)图。
图8是BT 2的红外(IR)图。
图9是BT 3的红外(IR)图。
图10是目标分子BT1、BT2、BT3的IPCE曲线图。
图11是目标分子BT1、BT2、BT3的EIS Nyquist图。
图12是目标分子BT1、BT2、BT3的Bode图。
具体实施方式:
为了更好的理解本发明,下面通过实施例对本发明进一步说明,实施例只用于解释本发明,不会对本发明构成任何的限定。
中间体1的合成
在装有球形冷凝管的500mL三口瓶中依次加入4,7-二溴-2,1,3-苯并噻二唑(4.20g,14mmol)、4-甲氧甲酰苯硼酸频哪醇酯(3.60g,14mmol),然后加入160mL甲苯,室温下搅拌溶解,N2保护下再加入K2CO3(2M,14mL)、TBAB(0.45g,1.4mmol)和Pd(PPh3)4(0.48g,0.42mmol),100℃下避光搅拌24h。待体系冷却至室温,向反应液加入100mL蒸馏水进行稀释,然后用CH2Cl2萃取(100mL×3),饱和食盐水(100mL×3)洗涤,无水硫酸镁干燥,过滤,旋除溶剂,剩余物经硅胶柱层析[洗脱剂,V(石油醚):V(二氯甲烷)=2:1],纯化得淡黄色固状中间体1(3.20g),产率67%。1H NMR(400MHz,CDCl3)δ:8.20(d,J=8.4Hz,2H),7.98(dd,J=9.9,8.1Hz,3H),7.64(d,J=7.6Hz,1H),3.97(s,3H).13C NMR(101MHz,CDCl3)δ:166.75,153.89,152.85,140.93,132.78,132.19,130.02,129.16,128.77,114.25,52.31.
中间体2的合成
在装有球形冷凝管的250mL三口瓶中加入2,7-二溴-9,9-二丁基芴(3.04g,6.98mmol)、4,4'-二甲氧基二苯胺(0.80g,3.49mmol)、100mL甲苯、叔丁醇钠(0.84g,8.73mmol),N2保护下再加入Pd(dppf)Cl2(0.12g,0.17mmol),80℃下搅拌过夜。待体系冷却至室温,向反应液加入100mL蒸馏水进行稀释,然后用CH2Cl2萃取(200mL×3),饱和食盐水(200mL×3)洗涤,无水硫酸镁干燥,过滤,旋除溶剂,剩余物经硅胶柱层析[洗脱剂,V(石油醚):V(乙酸乙酯)=100:1]纯化得淡黄色固状中间体13(1.12g),产率55%。1H NMR(400MHz,Acetone)δ:7.53–7.41(m,3H),7.35(d,J=8.1Hz,1H),6.96(d,J=7.5Hz,4H),6.78(dd,J=20.3,7.9Hz,6H),3.70(s,6H),1.89–1.73(m,4H),0.99(dt,J=14.4,7.1Hz,4H),0.61(t,J=7.2Hz,6H),0.56–0.49(m,4H).13C NMR(101MHz,Acetone)δ:152.33,152.13,151.47,149.01,140.84,131.44,129.88,126.03,120.05,119.22,115.11,115.11,54.97,39.60,29.01,25.98,22.71,13.34.
此外,中间体2的合成过程中,2,7-二溴-9,9-二丁基芴还可以被其他2,7-二溴-9,9-二烷基芴所取代,所述烷基为碳原子数为1-20的烷基取代基。
中间体3的合成
中间体3的合成方法与中间体2的合成方法类似,以2,7-二溴-N-丁基咔唑(2.65g,6.99mmol)为底物,纯化得白色固状中间体3(1.10g),产率60%。1H NMR(400MHz,Acetone)δ:7.83(d,J=8.4Hz,2H),7.58(s,1H),7.18(d,J=8.3Hz,1H),6.99(d,J=8.1Hz,4H),6.91(s,1H),6.82(d,J=8.6Hz,4H),6.71(d,J=8.2Hz,1H),4.12(t,J=7.0Hz,2H),3.71(s,6H),1.62(dd,J=14.6,6.9Hz,2H),1.23–1.16(m,2H),0.77(t,J=7.3Hz,3H).13CNMR(101MHz,Acetone)δ:156.07,141.98,141.66,126.33,122.22,121.66,120.73,120.60,117.33,114.68,111.60,101.28,54.85,42.15,30.76,20.04,13.22.
此外,中间体3的合成过程中,2,7-二溴-N-丁基咔唑还可以被其他2,7-二溴-N-烷基咔唑所取代,所述烷基为碳原子数为1-20的烷基取代基。
中间体4的合成
中间体4的合成方法与中间体2的合成方法类似,以3,7-二溴-N-丁基吩噻嗪(3.21g,8.00mmol)为底物,纯化得黄色固状中间体4(1.30g),产率58%。然后直接开下一步合成中间体7。
此外,中间体4的合成过程中,3,7-二溴-N-丁基吩噻嗪还可以被其他3,7-二溴-N-烷基吩噻嗪所取代,所述烷基为碳原子数为1-20的烷基取代基。
中间体5的合成
在装有球形冷凝管的250mL三口瓶中加入中间体2(1.63g,2.80mmol)、双联频哪醇硼酯(1.42g,2.56mmol)、无水乙酸钾(1.10g,11.17mmol)、150mL无水1,4二氧六环,N2保护下再加入Pd(dppf)Cl2(0.10g,0.14mmol),80℃下搅拌过夜。待体系冷却至室温,向反应液加入100mL蒸馏水进行稀释,然后用CH2Cl2萃取(200mL×6),饱和食盐水(200mL×6)洗涤,无水硫酸镁干燥,过滤,旋除溶剂,剩余物经硅胶柱层析[洗脱剂,V(石油醚):V(乙酸乙酯)=100:1]纯化得黄色固状中间体5(1.13g),产率64%。1H NMR(400MHz,Acetone)δ:7.63(s,2H),7.59–7.50(m,2H),6.97(d,J=7.6Hz,4H),6.79(dd,J=15.7,8.1Hz,6H),3.70(s,6H),1.82(ddd,J=19.5,14.3,6.2Hz,4H),1.26(s,12H),1.02–0.94(m,4H),0.60(t,J=7.3Hz,6H),0.54(s,3H).13C NMR(101MHz,Acetone)δ:156.01,152.33,149.17,144.37,141.15,133.88,128.41,126.17,120.77,120.03,118.14,115.69,114.67,83.49,54.86,54.63,39.84,29.02,26.05,24.45,22.78,13.41.
中间体6的合成
中间体6的合成与中间体5的合成方法类似,以中间体3(2.65g,6.99mmol)为底物,纯化得白色固状中间体6(1.10g,产率60%)。1H NMR(400MHz,Acetone)δ:7.83(d,J=8.4Hz,2H),7.58(s,1H),7.18(d,J=8.3Hz,1H),6.99(d,J=8.1Hz,4H),6.91(s,1H),6.82(d,J=8.6Hz,4H),6.71(d,J=8.2Hz,1H),4.12(t,J=7.0Hz,2H),3.71(s,6H),1.62(dd,J=14.6,6.9Hz,2H),1.23–1.16(m,2H),0.77(t,J=7.3Hz,3H).13C NMR(101MHz,Acetone)δ:156.07,141.98,141.66,126.33,122.22,121.66,120.73,120.60,117.33,114.68,111.60,101.28,54.85,42.15,30.76,20.04,13.22.
中间体7的合成
中间体7的合成与中间体5的合成方法类似,以中间体4(0.56g,1.00mmol)为底物,纯化得黄色固状中间体7(0.41g),产率67%。1H NMR(400MHz,Acetone)δ:7.55(d,J=8.1Hz,1H),7.40(s,1H),6.97(d,J=7.6Hz,5H),6.87(d,J=8.2Hz,5H),6.73(d,J=8.8Hz,1H),6.68(d,J=1.8Hz,1H),3.90(t,J=6.9Hz,2H),3.77(s,6H),1.79–1.72(m,2H),1.46(dt,J=14.7,7.5Hz,2H),1.30(s,12H),0.92(t,J=7.3Hz,3H).13C NMR(101MHz,Acetone)δ:155.86,148.19,144.49,141.08,138.53,134.26,133.28,125.41,125.41,122.98,120.41,116.24,114.67,83.50,54.82,46.62,28.97,24.36,19.73,13.19.
中间体8的合成
在装有球形冷凝管的250mL三口瓶中加入中间体5(0.42g,0.66mmol)、中间体1(0.30g,0.86mmol)、K2CO3(2M,1mL)、TBAB适量、甲苯(100mL),将体系抽成真空,置换氩气,在氩气氛围下加入Pd(PPh3)4(0.04g,0.04mmol),80℃下搅拌24h。待体系冷却至室温,向反应液加入100mL蒸馏水进行稀释,然后用CH2Cl2萃取(100mL×3),饱和食盐水(100mL×3)洗涤,无水硫酸镁干燥,滤纸过滤,所得滤液减压蒸除溶剂,剩余物经硅胶柱层析[洗脱剂,V(石油醚):V(乙酸乙酯)=20:1]纯化得橙红色固状中间体8(0.36g),产率70%。1H NMR(400MHz,THF)δ:8.12(q,J=8.4Hz,4H),8.04(s,1H),7.98–7.90(m,3H),7.69(d,J=7.9Hz,1H),7.52(d,J=8.3Hz,1H),7.03–6.98(m,5H),6.84–6.77(m,5H),3.85(s,3H),3.71(s,6H),1.98(dt,J=13.1,7.8Hz,2H),1.85(dt,J=13.1,7.8Hz,2H),1.07(dd,J=14.6,7.3Hz,4H),0.71(dt,J=14.7,7.6Hz,10H).13C NMR(101MHz,THF)δ:165.87,156.07,150.37,141.83,141.24,134.63,129.32,129.07,128.72,128.25,127.35,126.03,123.67,120.35,120.09,118.54,115.69,114.41,54.84,54.61,39.87,26.11,23.01,13.32.
中间体9的合成
中间体9的合成与中间体8的合成方法类似,以中间体6(0.31g,0.53mmol)为底物,纯化得黑色固体粉末9(0.28g),产率72%。1H NMR(400MHz,THF)δ:8.07(dd,J=20.8,8.7Hz,5H),7.96–7.90(m,3H),7.78(d,J=8.5Hz,1H),7.71(dd,J=8.1,1.4Hz,1H),6.97–6.90(m,5H),6.71(dd,J=13.1,5.4Hz,5H),4.15(t,J=6.9Hz,2H),3.79(s,3H),3.65(s,6H),1.20(dd,J=16.4,8.8Hz,4H),0.78(d,J=7.3Hz,3H).13C NMR(101MHz,THF)δ:165.06,155.17,153.41,152.85,147.19,141.79,140.66,139.12,134.36,132.35,130.10,128.39,126.89,125.21,122.67,119.56,119.35,118.10,116.07,113.64,108.95,100.65,53.80,50.38,41.22,30.28,19.48,12.49.
中间体10的合成
中间体10的合成与中间体8的合成方法类似,以中间体7(0.30g,0.50mmol)为底物,纯化得黑色固体粉末10(0.23g),产率62%。1H NMR(400MHz,THF)δ:8.11(d,J=6.9Hz,4H),7.94–7.79(m,4H),7.02(d,J=8.4Hz,1H),6.90(d,J=8.1Hz,4H),6.74(d,J=8.5Hz,7H),3.87(s,2H),3.85(s,3H),3.68(s,6H),1.46(d,J=7.2Hz,2H),1.23(s,2H),0.93(d,J=7.1Hz,3H).13C NMR(101MHz,THF)δ:165.90,155.78,153.93,145.84,144.39,141.77,141.26,138.89,129.30,129.03,128.77,126.58,125.37,120.08,115.76,114.84,114.41,54.62,51.22,46.78,29.06,19.99,13.22.
实施例1
目标分子BT1的合成:
在装有球形冷凝管的100mL三口瓶中加入中间体8(110mg,0.14mmol)、KOH(78mg,1.40mmol)、30mL THF和10mL H2O,80℃下搅拌过夜。待体系冷却至室温,用乙酸乙酯萃取(100mL×3),0.1M的HCl(100mL×3)洗涤,无水硫酸镁干燥,过滤,旋除溶剂,剩余物经硅胶柱层析[洗脱剂,V(CH2Cl2):V(CH3OH)=10:1],纯化得橙红色固体粉末BT1(84mg),产率78%。1H NMR(400MHz,DMSO)δ:8.16(d,J=10.1Hz,4H),8.10–8.03(m,4H),7.83(d,J=8.1Hz,1H),7.70(d,J=8.0Hz,1H),7.03(d,J=9.0Hz,4H),6.93(t,J=9.0Hz,5H),6.81(d,J=8.4Hz,1H),3.76(s,6H),1.98(s,4H),1.11–1.04(m,4H),0.70(t,J=7.4Hz,10H).MALDI-TOF-MS,m/z:calcd for C48H45N3O4S[M]+:759.313;found 759.389.IR v/cm-1:2928,1675(VOH-C=O).
实施例2
目标分子BT2的合成:
BT2的合成与BT1的合成方法类似,以中间体9(103mg,0.14mmol)为底物,纯化得橙红色固体粉末BT2(83mg),产率82%。1H NMR(400MHz,DMSO)δ:8.13(d,J=11.1Hz,8H),7.98(d,J=8.3Hz,1H),7.84(s,1H),7.06(d,J=8.5Hz,4H),6.93(s,5H),6.72(d,J=8.4Hz,1H),4.23(s,2H),3.74(s,6H),1.68(s,2H),1.21(d,J=0.5Hz,2H),0.81(d,J=7.4Hz,3H).MALDI-TOF-MS,m/z:calcd for C43H36N4O4S[M]+:704.246;found 703.968.IR v/cm-1:2927,1683(VOH-C=O).
实施例3
目标分子BT3的合成:
BT3的合成与BT1的合成方法类似,以中间体10(105mg,0.14mmol)为底物,纯化得黑红色固体粉末BT3(41mg),产率40%。1H NMR(400MHz,THF)δ:8.06(s,4H),7.98–7.96(m,2H),7.90(d,J=7.2Hz,2H),7.53(s,1H),7.34(dd,J=9.5,6.9Hz,2H),7.13(dd,J=9.1,2.6Hz,1H),6.93(d,J=8.9Hz,4H),6.75(d,J=8.9Hz,4H),4.24(d,J=23.1Hz,2H),3.65(s,6H),1.83(s,2H),1.18(s,2H),0.90(d,J=7.4Hz,3H).MALDI-TOF-MS,m/z:calcdforC43H36N4O4S2[M]+:736.218;found 736.932.IR v/cm-1:2928,1713(VOH-C=O).
上述实施例中目标分子BT1、BT2、BT3在THF溶液中和固体TiO2膜上的紫外可见吸收光谱和荧光光谱结果见表1,实施例中目标分子BT1、BT2、BT3电化学性质的相关数据见表2,实施例中目标分子BT1、BT2、BT3热稳定性性质的相关数据见表3,实施例中目标分子BT1、BT2、BT3吸附量相关数据见表4。
表1目标分子BT1、BT2、BT3的光谱数据
a measured in THF solution.b measured on TiO2film.
表2目标分子BT1、BT2、BT3的循环伏安数据
λint:标准化紫外可见吸收光谱与标准化荧光发射光谱的交点对应的波长;
E0-0=1240/λint;Ered=Eox-E0-0;Egap=-0.5V-Ered.
表3目标分子BT1、BT2、BT3失重5%的热分解温度
表4目标分子BT1、BT2、BT3的吸附量
表1结果显示,在THF溶液中,几种目标分子的最大吸收波长分别为458nm、452nm和447nm,虽然它们的吸收光谱峰型轮廓基本相似,但最大吸收光谱峰值明显不同,且摩尔消光系数有一定的差异。与目标分子BT1相比,BT2蓝移了6nm,BT3蓝移了11nm,这是因为咔唑和吩噻嗪的平面性不如芴的平面性,破坏了分子的共轭平面所致。
在THF溶液中,几种目标分子的最大发射波长分别为685nm、686nm和531nm,斯托克斯位移分别为227nm、235nm和84nm,这说明染料BT1-3的分子内电荷迁移都很顺畅。BT1-3在固体TiO2膜上的最大吸收波长分别为468nm、469nm和460nm,相比其在二氯甲烷中的最大吸收波长分别红移了10nm、17nm和13nm,最大吸收光谱发生红移和拓宽,这是因为目标染料分子在固体TiO2膜上发生了J聚积,分子间的π-π堆积效应增强。
表2结果显示,三种目标分子的光学带隙E0-0分别为:2.42、2.38、2.62eV;第一氧化电位分别为:0.62、0.67、0.64V;计算得BT1-3对应的还原电位分别为:-1.80、-1.71、-1.98V;染料激发态氧化还原电位(Ered)与TiO2导带的能级(0.5V vs NHE)的差值(Egap)分别为:1.3、1.21、1.48eV。结果表明染料BT1-3的氧化电位均比电解液中氧化还原电对(I-/I3 -)的氧化电位(0.4V)更正,这说明失去电子的氧化态染料分子能够从电解液中(I-/I3 -)电对获取电子实现染料再生在热力学上是可以实现的;染料BT1-3的还原电位均比二氧化钛的导带的能级(-0.5V vs.NHE)更负,且染料激发态氧化还原电位(Ered)与TiO2导带的能级(0.5V vs NHE)的差值(Egap)大于0.2V,从热力学的角度说明染料的激发态电子能够有效的注入TiO2的导带,因此很明显染料BT1-3很适合应用于DSSCs领域。
表3结果显示,BT1-3失重5%的热分解温度分别为245、227和284℃,都大于200℃左右,具有一定的差异性,这说明染料BT1-3给体单元对染料的热稳定性有较大的影响。其中,以含吩噻嗪的三芳胺衍生物作为给电子单元的BT3具有最高的热分解温度,这可能是因为杂原子S的引入形成了S-H健,增强了其热稳定性。
表4结果显示,BT1、BT2和BT3在单位面积TiO2薄膜上的吸附量分别为:3.81×10- 7mol cm-2、4.72×10-7mol cm-2和5.63×10-7mol cm-2,吸附量越大,其单位面积上的捕光基团越多,越有利于获得更好的光电性能。
图10结果显示,在IPCE曲线中,染料BT1在460-535nm的窄范围内其IPCE值超过了50%,在波长为470nm时其IPCE值达到了61.4%,其吸收边带在685nm,染料BT2在460-500nm的窄范围内其IPCE值超过了70%,在470nm时其IPCE值达到了76.7%,其吸收边带在650nm。染料BT3在440-535nm的窄范围内其IPCE值超过了60%,在470nm时其IPCE值达到了69.2%,其吸收边带在675nm。BT2和BT3的IPCE各有优势,BT3吸收宽,强度稍低,BT2吸收较窄但吸收强度高。因此整体而言,最终BT2显示出更好的光电性能。
图11结果显示,BT1的Rrec值最大,BT3的Rrec值最小,这表明BT1-3的复合速率:BT3>BT2>BT1。图12结果显示,BT3的频率最大,BT1的频率最小,这表明BT1-3的电子寿命:BT1﹥BT2﹥BT3。电子寿命短,使得电子与I3 -/I-的复合更易发生,产生暗电流,不利于提升开路电压。Bode图与J-V曲线以及Nquist曲线分析所得到的三个染料Voc值的大小结论之间基本是一致的。
本发明通过上述实施例来说明本发明的详细合成方法,但本发明并不局限于上述方法,即不意味着本发明必须依赖上述反应条件才能实施。所属技术领域的技术人员应该明了,对本发明的任何改进,对本发明反应溶剂、催化剂的等效替换及反应具体条件的改变等,均落在本发明的保护范围和公开范围之内。
Claims (10)
1.一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物,其特征在于,该化合物具有通式I的结构:
其中,D是给体单元,具体为以下几种结构单元:
n为1-20的自然数。
2.如权利要求1所述的一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物的制备方法,其特征在于,包括以下步骤:
(1)在碱和催化剂的条件下,4,7-二溴-2,1,3-苯并噻二唑与4-甲氧甲酰苯硼酸频哪醇酯经Suzuki偶联反应制得中间体1,其结构为:
(2)2,7-二溴-9,9-二烷基芴与4,4'-二甲氧基二苯胺经Buchwald偶联反应制得中间体2,其结构为:
(3)2,7-二溴-N-烷基咔唑与4,4'-二甲氧基二苯胺经Buchwald偶联反应制得中间体3,其结构为:
(4)3,7-二溴-N-烷基吩噻嗪与4,4'-二甲氧基二苯胺经Buchwald偶联反应制得中间体4,其结构为:
(5)中间体2与双联频哪醇硼酯经反应制得中间体5,其结构为:
(6)中间体3与双联频哪醇硼酯经反应制得中间体6,其结构为:
(7)中间体4与双联频哪醇硼酯经反应制得中间体7,其结构为:
(8)中间体1与中间体5经Suzuki偶联反应制得中间体8,其结构为:
(9)中间体1与中间体6经Suzuki偶联反应制得中间体9,其结构为:
(10)中间体1与中间体7经Suzuki偶联反应制得中间体10,其结构为:
(11)中间体8经水解反应,得到目标分子BT1,其结构为:
(12)中间体9经水解反应,得到目标分子BT2,其结构为:
(13)中间体10经水解反应,得到目标分子BT3,其结构为:
3.如权利要求2所述的一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物的制备方法,其特征在于,步骤(1)~(13)中,反应的反应介质为甲苯、乙醇、1,4-二氧六环、四氢呋喃、水中的一种或几种混合。
4.如权利要求2所述的一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物的制备方法,其特征在于,步骤(1)~(10)中,反应所用的催化剂为四(三苯基膦)钯、1,1'-双二苯基膦二茂铁二氯化钯、四丁基溴化铵中的一种或几种混合。
5.如权利要求2所述的一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物的制备方法,其特征在于,步骤(1)中,4,7-二溴-2,1,3-苯并噻二唑与4-甲氧甲酰苯硼酸频哪醇酯的摩尔比为1:1~1:2。
6.如权利要求2所述的一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物的制备方法,其特征在于,步骤(2)、(3)、(4)中,反应所用的碱为叔丁醇钠。
7.如权利要求6所述的一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物的制备方法,其特征在于,步骤(2)、(3)、(4)中2,7-二溴-9,9-二烷基芴、2,7-二溴-N-烷基咔唑、3,7-二溴-N-烷基吩噻嗪与4,4'-二甲氧基二苯胺和叔丁醇钠的摩尔比均为(2~4):1:(2~3)。
8.如权利要求2所述的一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物的制备方法,其特征在于,步骤(5)、(6)、(7)中的中间体5、中间体6、中间体7与双联频哪醇硼酯的摩尔比均为(1.1~2):1。
9.如权利要求2所述的一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物的制备方法,其特征在于,步骤(8)、(9)、(10)中的中间体8、中间体9、中间体10与中间体1的摩尔比均为1:(1.1~2)。
10.如权利要求2所述的一种基于苯基桥联和羧基封端的D-A-π-A型苯并噻二唑衍生物的制备方法,其特征在于,步骤(1)~(13)中,所述反应的反应温度为80~110℃,所述反应的反应时间为12~24h。
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