AU2021101799A4 - Eutectic compound with solid fluorescence property and preparation method and application thereof - Google Patents
Eutectic compound with solid fluorescence property and preparation method and application thereof Download PDFInfo
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 56
- 230000005496 eutectics Effects 0.000 title claims abstract description 56
- 239000007787 solid Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- VYXSBFYARXAAKO-WTKGSRSZSA-N chembl402140 Chemical compound Cl.C1=2C=C(C)C(NCC)=CC=2OC2=C\C(=N/CC)C(C)=CC2=C1C1=CC=CC=C1C(=O)OCC VYXSBFYARXAAKO-WTKGSRSZSA-N 0.000 claims abstract description 33
- 125000000129 anionic group Chemical group 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 54
- 239000000243 solution Substances 0.000 claims description 14
- 239000002243 precursor Substances 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 239000000090 biomarker Substances 0.000 claims description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 2
- 238000002425 crystallisation Methods 0.000 claims description 2
- 230000008025 crystallization Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 239000003814 drug Substances 0.000 claims description 2
- 229940079593 drug Drugs 0.000 claims description 2
- 238000005401 electroluminescence Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 claims description 2
- VYXSBFYARXAAKO-UHFFFAOYSA-N ethyl 2-[3-(ethylamino)-6-ethylimino-2,7-dimethylxanthen-9-yl]benzoate;hydron;chloride Chemical compound [Cl-].C1=2C=C(C)C(NCC)=CC=2OC2=CC(=[NH+]CC)C(C)=CC2=C1C1=CC=CC=C1C(=O)OCC VYXSBFYARXAAKO-UHFFFAOYSA-N 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000000967 suction filtration Methods 0.000 claims description 2
- 230000002194 synthesizing effect Effects 0.000 claims description 2
- 229910008894 U—Mo Inorganic materials 0.000 abstract description 22
- 239000007850 fluorescent dye Substances 0.000 abstract description 8
- 238000004020 luminiscence type Methods 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 5
- 125000002091 cationic group Chemical group 0.000 abstract description 4
- 238000011160 research Methods 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 12
- 239000000843 powder Substances 0.000 description 12
- 239000002244 precipitate Substances 0.000 description 8
- 239000000706 filtrate Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 229910015667 MoO4 Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002189 fluorescence spectrum Methods 0.000 description 2
- 238000006862 quantum yield reaction Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000004467 single crystal X-ray diffraction Methods 0.000 description 2
- 238000001308 synthesis method Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000990 laser dye Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F11/00—Compounds containing elements of Groups 6 or 16 of the Periodic Table
- C07F11/005—Compounds containing elements of Groups 6 or 16 of the Periodic Table compounds without a metal-carbon linkage
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/18—Metal complexes
- C09K2211/188—Metal complexes of other metals not provided for in one of the previous groups
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Luminescent Compositions (AREA)
Abstract
Austracy
The present invention belongs to the field of composite materials, and discloses
a eutectic compound with solid fluorescence property and a preparation method and
application thereof. The eutectic compound
{[C2 8 H3 1ClN 2 0 3 ]2 [N(C 4H 9) 4 ]2 }[a-M oO2 is obtained by originally dissolving and
recrystallizing anionic molecular clusters {U-Mo 8 O 26 } and cationic organic
fluorescent dye molecule rhodamine 6G. Compared with solid rhodamine 6G, the
fluorescence intensity of the eutectic compound is enhanced by nearly 14 times. The
composite material synthesized by the present invention not only enriches the
application of polyoxometallates in solid luminescence, but also provides valuable
experience for researchers to further research solid luminescent materials and for the
research hotspot in luminescence and luminescence mechanisms of aggregates in
recent years.
1
Drawings of Description
yO
Mc
00
N
H
1C
Fig. 1
ON
H
Fig.2
1
Description
Austracy
The present invention belongs to the field of composite materials, and discloses a eutectic compound with solid fluorescence property and a preparation method and application thereof. The eutectic compound {[C2 8 H3 ClN 1 20 ][N(C 4 H ) 49 2 ] }[a-M 3 2 oO 2 is obtained by originally dissolving and recrystallizing anionic molecular clusters {U-Mo 8 O 26 } and cationic organic fluorescent dye molecule rhodamine 6G. Compared with solid rhodamine 6G, the fluorescence intensity of the eutectic compound is enhanced by nearly 14 times. The composite material synthesized by the present invention not only enriches the application of polyoxometallates in solid luminescence, but also provides valuable experience for researchers to further research solid luminescent materials and for the research hotspot in luminescence and luminescence mechanisms of aggregates in recent years.
Drawings of Description
yO
Mc
00
1C Fig. 1
Fig.2
Description
Technical Field
The present invention belongs to the field of composite materials, and particularly relates to a eutectic compound with solid fluorescence property and a preparation method and application thereof.
Background Fluorescence is a characteristic of substances, which plays a vital role in many technologies such as OLED, biomarkers, etc. Fluorescence can also be observed in many types of dye molecules. These organic fluorescent dye molecules can emit strong fluorescence in a dilute solution, but the fluorescence intensity may decrease or hardly exist in a solution with high concentration, which is called aggregation-induced quenching. When dyes are tightly packed in solid state, exciton coupling may occur and a new exciton state may be generated, resulting in quenching phenomenon. Therefore, how to keep the strong luminescence property of organic fluorescent dye molecules in the solid state is an urgent problem to be solved by scientists.
Summary In view of this, a purpose of the present invention is to provide a eutectic compound capable of reserving strong luminescence properties of organic fluorescent dye molecules in solid state to solve the problems in the prior art. To realize the above purpose, the present invention adopts the following technical solution:
Description
A eutectic compound with solid fluorescence property is provided. A chemical molecular formula of the eutectic compound is {[C 2 8H 3 ClN 1 2 0 3 2][N(C 4 H9)4] 2 }[a-MoO26], and a molecular structure is as shown
in formula 1:
00
Formula (1). Further, an anionic group of the eutectic compound is [a-Mo 8 O 2 6 ] 4 -, and a
structure of the anionic group is as shown in formula 2:
MC 0 N
Formula 2.
1)
Description
It should be noted that through single-crystal X-ray diffraction, the structure of the eutectic compound of the present invention is determined: {[C 2 8 H 3 1ClN 2 0 3 ] 2 [N(C 4 H 9 ) 4 ] 2 }[U-Mo 8 O 2 6], wherein the anionic portion
[U-Mo 8 O 2 6] 4 - is a ring structure composed of 6 octahedrons {MoO 6 } in an edge-sharing manner, and the upper end and the lower end of a ring are respectively provided with a tetrahedron {MoO4 }. In addition, 8 Mo atoms are connected by 6 two-bridge oxygens and 6 three-bridge oxygens. A second purpose of the present invention is to provide a preparation method of the eutectic compound. To realize the above purpose, the present invention adopts the following technical solution: The preparation method of the eutectic compound with solid fluorescence property includes the following steps: I, synthesizing a precursor [N(C 4 H 9 )4]4[U-Mo 8 O 26 ]: mixing MoO 3 and
[(n-C 4H 9)4N]OH aqueous solution at a room temperature to obtain a white milky substance, then performing the suction filtration and vacuum drying, dissolving the substance in acetonitrile, and then storing in a refrigerator for crystallization; II, dissolving [N(C 4 H 9 ) 4 ]4[-Mo 8 O 2 6 ]obtained in the step I in acetonitrile, adding rhodamine 6G dissolved in organic solvent to obtain a yellow solution, and volatilizing the solvent to obtain the eutectic compound with the solid fluorescence property. Further, in the step I, a molar ratioof MoO 3 to [(n-C 4H 9 )4N]OH is 2:1.
Further, the mixing time in the step I is 60 h, and the vacuum drying time is -20 h. Further, in the step II, a molar ratio of [N(C 4 H 9 )4]4[U-Mo 8 O2 6 ] to R6G is 2:1 to
8:1. Further, the organic solvent in the stepII includes acetonitrile, methanol, N,N'-dimethylformamide or dichloromethane.
Description
It should be noted that the synthesis method of the present invention is simple and efficient. Crystals which emit red fluorescence can be obtained only by mixing the precursor [N(C 4 H 9 )4]4[U-Mo 8 O2 6] and the rhodamine 6G and then volatilizing the solvent. The rhodamine 6G is one of the rhodamine family dyes with high fluorescence property, can be used as a laser dye, has high photostability, high fluorescence quantum yield and low cost, and is often used to determine the reference of the fluorescence quantum yield of other substances. However, the rhodamine 6G may be aggregated in solid state due to 1 -7 interaction, so the high fluorescence intensity of the rhodamine 6G in a dilute solution cannot be maintained in the solid state. Polyoxometalates are a kind of anionic metal-oxo clusters. The combination of cationic rhodamine 6G and anionic polyoxometalates can reduce the aggregation between rhodamine 6G molecules and separate the rhodamine 6G molecules, so that the fluorescence intensity in the solid state is enhanced. A third purpose of the present invention is to provide an application of the eutectic compound. To realize the above purpose, the present invention adopts the following technical solution: The eutectic compound with solid fluorescence property is used in the preparation of temperature sensors, pressure sensors, concentration sensors, gas sensors, electrochemical sensors and electroluminescence devices, drug analysis, environmental monitoring, biosensing, biomarkers, bioimaging or analysis and detection materials and devices. Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention combines cationic rhodamine 6G and anionic polyoxometalates, which can reduce the aggregation between the rhodamine 6G molecules and separate the rhodamine 6G molecules, so that the fluorescence intensity in the solid state is enhanced.
Description
2. In the present invention, the strategy of separating aggregated fluorescent dye molecules by using polyoxometalates with adjustable structure and charges provides more possibilities and basis for preparing more eutectic compounds with strong fluorescence in the solid state. 3. The synthesis method of the present invention is simple, moderate in synthesis condition and high in yield, and has the potential of industrialized application.
Description of Drawings To more clearly describe the technical solutions in the embodiments of the present invention or in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be simply presented below. Apparently, the drawings in the following description are merely the embodiments of the present invention, and for those ordinary skilled in the art, other drawings can also be obtained according to the provided drawings without contributing creative labor. Fig. 1 is a molecular structural diagram of a eutectic compound of the present invention; Fig. 2 is a molecular structural diagram of anions of the present invention; Fig. 3 is a photo of crystals of the eutectic compound of the present invention; Fig. 4 is a diffuse reflection spectrogram of the eutectic compound and rhodamine 6G of the present invention; Fig. 5 is an image of fluorescence emission of the eutectic compound and the rhodamine 6G under irradiation of a 365 nm ultraviolet lamp of the present invention; Fig. 6 is a solid fluorescence spectrogram of the eutectic compound and the rhodamine 6G of the present invention;
Description
Fig. 7 is a fluorescence lifespan graph of rhodamine 6G of the present invention; and
Fig. 8 is a fluorescence lifespan graph of the eutectic compound of the present invention.
Detailed Description The technical solutions in embodiments of the present invention will be clearly and fully described below. Apparently, the described embodiments are merely part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those ordinary skilled in the art without contributing creative labor will belong to the protection scope of the present invention. To better understand the present invention, the present invention is further described specifically through the following embodiments, which should not be construed as a limitation to the present invention. For those skilled in the art, non-essential improvements and adjustments made based on the above summary of the present invention are also regarded as falling within the protection scope of the present invention. Embodiment 1 A eutectic compound with solid fluorescence property and a preparation method thereof are provided. The method includes the following specific steps: I, a precursor [N(C 4 H 9 ) 4 ]4[U-Mo 8 O2 6 ]is synthesized:MoO 3 is dissolved in a
[(n-C 4H 9 )4N]OH aqueous solution, wherein a molar ratio of MoO 3 to
[(n-C 4H 9)4N]OH is 2: 1; the mixture is mixed violently for 60 h; after the pH of the mixture is changed from 7.8 to 6.1, a gray suspension is changed to white precipitates; and the white precipitates are suction-filtered and vacuum dried for 10 h to obtain white powder, and the white powder is [N(C 4 H 9 )4]4[U-Mo 8 O 26 ]. Then
Description
the white powder is dissolved in acetonitrile, the mixture is filtered, and filtrate is stored in a refrigerator for standby use. II, 0.9 mL of precursor [N(C 4 H 9 ) 4 ]4[U-Mo 8 O2 6 ](0.1 g/10 mL) dissolved in acetonitrile is added into 2 mL of rhodamine 6G (0.01 g/10 mL) dissolved in the acetonitrile to obtain a yellow solution, and after solvent is volatilized, the eutectic compound {[C 2 8H 3 1ClN 2 0 3 ]2 [N(C 4 H 9 ) 4 ] 2 }[U-Mo 8 O 2 6] with solid fluorescence
property is obtained. Embodiment 2 A eutectic compound with solid fluorescence property and a preparation method thereof are provided. The method includes the following specific steps: I, a precursor [N(C 4 H 9) 4 ]4[U-Mo 8 O2 6 ]is synthesized:MoO 3 is dissolved in a
[(n-C 4H 9)4N]OH aqueous solution, wherein a molar ratio of MoO 3 to
[(n-C 4H 9)4N]OH is 2: 1; the mixture is mixed violently for 60 h; after the pH of the mixture is changed from 7.8 to 6.1, a gray suspension is changed to white precipitates; and the white precipitates are suction-filtered and vacuum dried for 20 h to obtain white powder, and the white powder is [N(C 4 H 9 )4]4[U-Mo 8 O 26 ]. Then the white powder is dissolved in acetonitrile, the mixture is filtered, and filtrate is stored in a refrigerator for standby use. II, 0.3 mL of precursor [N(C 4 H 9 ) 4 ]4[U-Mo 8 O2 6 ] (0.1 g/10 mL) dissolved in acetonitrile is added into 2 mL of rhodamine 6G (4x10-4 g/mL) dissolved in the acetonitrile to obtain a yellow solution, and after solvent is volatilized, the eutectic compound {[C 2 8H 3 1ClN 2 0 3 ]2 [N(C 4 H 9 ) 4 ] 2 }[U-Mo 8 O 2 6] with solid fluorescence
property is obtained. Embodiment 3 A eutectic compound with solid fluorescence property and a preparation method thereof are provided. The method includes the following specific steps: I, a precursor [N(C 4 H 9 ) 4 ]4[U-Mo 8 O 2 6 ] is synthesized:
MoO3 is dissolved in a [(n-C 4H 9)4N]OH aqueous solution, wherein a molar ratioof MoO 3 to [(n-C 4H 9)4N]OH is 2: 1; the mixture is mixed violently for 60 h;
Description
after the pH of the mixture is changed from 7.8 to 6.1, a gray suspension is changed to white precipitates; and the white precipitates are suction-filtered and vacuum dried for 13 h to obtain white powder, and the white powder is
[N(C 4 H 9 ) 4 ]4[-Mo 8 O 2 ].Then the white powder is dissolved in acetonitrile, the mixture is filtered, and filtrate is stored in a refrigerator for standby use. II, 0.5 mL of precursor [N(C 4 H 9 ) 4 ]4[U-Mo 8 O2 6 ] (0.1 g/10 mL) dissolved in acetonitrile is added into 2 mL of rhodamine 6G (3.65x10-4 g/mL) dissolved in the acetonitrile to obtain a yellow solution, and after solvent is volatilized, the eutectic compound {[C 2 8H 3 1ClN 2 0 3 ]2 [N(C 4 H 9 ) 4 ] 2 }[U-Mo 8 O 2 6] with solid fluorescence
property is obtained. Embodiment 4 A eutectic compound with solid fluorescence property and a preparation method thereof are provided. The method includes the following specific steps: I, a precursor [N(C 4 H 9 ) 4 ]4[U-Mo 8 O 2 6 ] is synthesized:
MoO3 is dissolved in a [(n-C 4H 9) 4N]OH aqueous solution, wherein a molar ratioof MoO 3 to [(n-C 4H 9) 4N]OH is 2: 1; the mixture is mixed violently for 60 h; after the pH of the mixture is changed from 7.8 to 6.1, a gray suspension is changed to white precipitates; and the white precipitates are suction-filtered and vacuum dried for 16 h to obtain white powder, and the white powder is
[N(C 4 H 9 ) 4 ]4[-Mo 8 O 2 ].Then the white powder is dissolved in acetonitrile, the
mixture is filtered, and filtrate is stored in a refrigerator for standby use. II, 0.3 mL of precursor [N(C 4 H 9 ) 4 ]4[U-Mo 8 O2 6 ] (0.1 g/10 mL) dissolved in acetonitrile is added into 2 mL of rhodamine 6G (3.65x10-4 g/mL) dissolved in the acetonitrile to obtain a yellow solution, and after solvent is volatilized, the eutectic compound {[C 2 8H 3 1ClN 2 0 3 ]2 [N(C 4 H 9 ) 4 ] 2 }[U-Mo 8 O 2 6] with solid fluorescence
property is obtained. In order to further prove the beneficial effects of the present invention and to better understand the present invention, the following determination tests are used to further illustrate the strong solid fluorescence enhancement and synthesis based
Description
on molecular clusters [a-Mo 8 O2 6] and organic fluorescent dye molecules of the
present invention, but shall not be construed as a limitation to the present invention. For those skilled in the art, the properties of products obtained by other determination tests based on the above summary of the present invention and the applications based on the above properties are also regarded as falling within the protection scope of the present invention. Test example 1 Structural characterization of a eutectic compound with solid fluorescence property: The eutectic compound of the present invention is determined through single-crystal X-ray diffraction. It can be seen from Fig. 1 and Fig. 2 that an anionic portion [U-Mo 8 O2 6 ] 4- is a ring structure composed of 6 octahedrons {MoO 6 }
in an edge-sharing manner, and the upper end and the lower end of a ring are respectively provided with a tetrahedron {MoO4 }. In addition, 8 Mo atoms are connected by 6 two-bridge oxygens and 6 three-bridge oxygens. Each molecular cluster {a-Mo 8 O2 6 }is connected with two rhodamine 6G molecules and two
tetrabutyl groups through electrostatic interaction or hydrogen bonds. It can be seen from Fig. 3 that the eutectic compound obtained through the preparation method disclosed by the present invention is russet rodlike crystals. Test example 2 Property determination: A characterization method for the property of the eutectic compound of the present invetion is: Diffuse reflection spectrum: a wavelength range is set as 200-800 nm, a slit width is 4 nm, and 100 mg of obtained eutectic compound is stored in a sample pool and then tested in an instrument Agilent Carry 5000. Solid fluorescence spectrum: an excitation wavelength is set as 570 nm, an emission wavelength range is 580-800 nm, a slit width is 2 nm, and 100 mg of obtained eutectic compound is stored in the sample pool and then detected in an instrument FLS9800.
Description
Fluorescence lifespan: an excitation wavelength is set as 570 nm, an emission wavelength is 659 nm, a slit width is 5 nm, and the number of collected dots is 5000; and 100 mg of obtained eutectic compound is stored in the sample pool and then detected in an instrument FLS9800. Specifically, Fig. 4 is a diffusion reflection spectrogram of the eutectic compound of the present invention, rhodamine 6G and molecular clusters
[N(C 4 H) 4 ]4[-Mo 8 O 2 6 ]. It can be seen from the figure that the molecular clusters
[N(C 4 H)4]4[-Mo 8 O2 ] have a wide absorption peak in an ultraviolet band 200-400
nm, and the eutectic compound has a wide absorption peak in an ultraviolet visible band 200-600 nm, which indicates that rhodamine 6G and the molecular clusters
[N(C 4 H) 4 2 6] are compounded successfully, and the absorption spectrum ]4 [a-Mo 8 O of the molecular clusters [N(C 4 H)4]4[a-Mo 8 O2 6 ]can be broadened from the
ultraviolet band to the visible band through the combination with the organic fluorescent dye molecules, so that the application of the molecular clusters is expected to be enlarged. From the fluorescence spectrum, as shown in Figs. 5-6, the left side of Fig. 5 is an image of fluorescence emission of rhodamine 6G under the irradiation of a 365 nm ultraviolet lamp. It can be seen from the figure that the rhodamine 6G hardly emits fluorescence. The right side of Fig. 5 is an image of the fluorescence emission of the eutectic compound under the irradiation of the 365 nm ultraviolet lamp. It can be seen from the figure that the eutectic compound can emit strong red fluorescence. Fig. 6 is a fluorescence spectrogram of the eutectic compound and the rhodamine 6G of the present invention. Under the excitation wavelength of 570 nm, the emission wavelengths of the two are respectively about 650 nm. In addition, the fluorescence intensity of the eutectic compound is enhanced by nearly 14 times compared with the rhodamine 6G. Fig. 7 and Fig. 8 are fluorescence lifespan graphs of the rhodamine 6G and the eutectic compound. It can be seen from the figures that the fluorescence lifespans of the two are respectively within an ns range and decrease in a
Description
double-exponential manner; however, the fluorescence lifespan of the eutectic compound is apparently greater than the fluorescence lifespan of the rhodamine 6G. The above description of the disclosed embodiments enables those skilled in the art to realize or use the present invention. Many modifications to these embodiments will be apparent to those skilled in the art. The general principle defined herein can be realized in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principle and novel features disclosed herein.
Claims (8)
1. A eutectic compound with solid fluorescence property, wherein a chemical molecular formula of the eutectic compound is {[C 2 8H 3 ClN 1 2 0 3 2][N(C 4 H 9 )4 2 }[a-MoO 26 and ], a molecular structure is as shown in formula 1:
00 N
formula (1).
2. The eutectic compound with solid fluorescence property according to claim 1, wherein an anionic group of the eutectic compound is [a-Mo 8 O 2 6] 4 -, and a
structure of the anionic group is as shown in formula 2:
Claims
N
H
*C
formula 2.
3. A preparation method of the eutectic compound with solid fluorescence
property of claim 1, comprising the following steps:
I, synthesizing a precursor [N(C 4 H 9 ) 4 ] 4 [a-Mo 8 O 26]: mixing MoO 3 and
[(n-C 4 H 9 )4N]OH aqueous solution at a room temperature to obtain a white milky
substance, then performing suction filtration and vacuum drying, dissolving the substance in acetonitrile, and then storing in a refrigerator for crystallization;
II, dissolving [N(C 4 H 9) 4 ]4 [-Mo 8 O 2 6] obtained in the step I in acetonitrile,
adding rhodamine 6G dissolved in organic solvent to obtain a yellow solution, and
volatilizing the solvent to obtain the eutectic compound with the solid fluorescence
property.
4. The preparation method according to claim 3, wherein in the step I, a molar
ratio of MoO 3 to [(n-C 4H 9 )4 N]OH is 2:1.
5. The preparation method according to claim 4, wherein the mixing time in
the step I is 60 h, and the vacuum drying time is 10-20 h.
6. The preparation method according to claim 3, wherein in the step II, a
molar ratio of [N(C 4 H 9) 4 ]4 [-Mo 8 O2 6 ]to R6G is 2:1 to 8:1.
Claims
7. The preparation method according to claim 3, wherein the organic solvent in the step II comprises acetonitrile, methanol, N,N'-dimethylformamide or dichloromethane.
8. An application of the eutectic compound with solid fluorescence property of any one of claims 1-2 in the preparation of temperature sensors, pressure sensors, concentration sensors, gas sensors, electrochemical sensors and electroluminescence devices, drug analysis, environmental monitoring, biosensing, biomarkers, bioimaging or analysis and detection materials and devices.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110166598.1 | 2021-02-04 | ||
| CN202110166598.1A CN112940039B (en) | 2021-02-04 | 2021-02-04 | Eutectic compound with solid fluorescence performance and preparation method and application thereof |
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| KR102657054B1 (en) * | 2018-08-17 | 2024-04-15 | 나노코 2디 매테리얼 리미티드 | Polyoxometalate compound exhibiting bright emission and method for producing the same |
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