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Rare earth complex with light conversion function and preparation method thereof

A technology of rare earth complexes and light conversion, applied in chemical instruments and methods, compounds containing elements of group 3/13 of the periodic table, luminescent materials, etc., to achieve high fluorescence quantum yield, good light absorption characteristics, and good light conversion characteristics Effect

Active Publication Date: 2012-06-20
NANJING UNIV +1
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  • Description
  • Claims
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Problems solved by technology

[0004] In order to overcome the above-mentioned defects, the technical problem to be solved in the present invention is to provide a rare earth complex that can absorb light with a wavelength below 400nm in view of the problem that the range of light absorbed by the existing photoconverting functional complex is greater than 400nm

Method used

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  • Rare earth complex with light conversion function and preparation method thereof
  • Rare earth complex with light conversion function and preparation method thereof
  • Rare earth complex with light conversion function and preparation method thereof

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preparation example Construction

[0027] The synthetic method of rare earth complex of the present invention, its concrete steps are as follows:

[0028] Reacting the compound of formula V (VI, VII) with the compound of formula IV in an organic solvent to obtain the photoconversion rare earth complex of formula I (II, III).

[0029] The above reaction can be carried out in many organic solvents, such as methanol, ethanol, hexonitrile, acetone, tetrahydrofuran, dichloromethane, chloroform, one of n-hexane or a mixture thereof.

Embodiment 1

[0031] Embodiment 1, synthesizing the europium complex of structural formula VIII as shown in the formula (that is, Ln=Eu in the formula III, R 1 is 2-thienyl, R 2 trifluoromethyl)

[0032]

[0033] Formula VIII

[0034] Get compound IV (Ln=Eu, R 1 is 2-thienyl, R 2 Dissolve 0.05mmol of trifluoromethyl) in acetone to prepare solution A, take 0.05mmol of the ligand compound shown in formula VII and dissolve it in hot ethanol to prepare solution B, slowly add the solution of B to solution A middle. After stirring at 50°C for 1 h, the solvent was evaporated to dryness under reduced pressure to obtain 58 mg of a light yellow solid with the structure of Formula VIII.

[0035] Mass spectrometry (ESI) analysis was carried out to the light yellow solid obtained above, and the molecular ion peak M / Z=1159.99 was recorded; Elemental analysis (mass percentage content): C, 49.63% (49.70%); H, 3.45% (3.48% ); N, 2.44% (2.42%), theoretical values ​​in brackets. NMR spectrum charact...

Embodiment 2

[0037] Embodiment 2, synthesizing the europium complex shown in the formula IX (that is, Ln=Eu in the formula III, R 1 and R 2 Both are trifluoromethyl)

[0038]

[0039] Formula IX

[0040] Take structure such as formula IV (Ln=Eu, R 1 and R 2 Dissolve 0.05mmol of the compound shown in trifluoromethyl) in acetone to prepare solution A, and dissolve 0.05mmol of the ligand compound shown in formula VII in hot ethanol to prepare solution B, slowly dissolve the solution of B Slowly added to solution A. After stirring at 50°C for 1 h, the solvent was evaporated to dryness under reduced pressure to obtain 55 mg of a light yellow solid with the structure shown in Formula IX.

[0041] Mass spectrometry (ESI) analysis was carried out to the light yellow solid obtained above, and the molecular ion peak M / Z=1117.61 was recorded; Elemental analysis (mass percentage content): C, 41.88% (41.91%); H, 2.78% (2.80% ); N, 2.49% (2.51%), theoretical values ​​in brackets. NMR spectrum ...

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Abstract

The invention relates to a rare earth complex with the light conversion characteristic and a synthesis method thereof. The synthesis method of the rare earth complex is characterized in that bipyridyl ligand with a pinene functional group reacts with rear earth beta-diketone complex to generate the mixed rare earth complex comprising Beta-diketone and 2,2'- bipyridyl derivatives. The rare earth complex provided by the invention has good light absorption properties in the ultraviolet region and can emit visible light, thereby having the light conversion characteristic. The rare earth complex can be used as the critical material of the light conversion film for improving the spectral response characteristics of the solar cell and can be used as the agricultural light conversion film to increase the light energy utilization rate of the crop. The rare earth complex has important application value and wide application prospect in the aspects of analytical chemistry, medicine, life sciences, fluorescent probes and light-emitting devices, etc.

Description

technical field [0001] The invention relates to a rare earth complex with light conversion properties and a synthesis method thereof. Background technique [0002] Solar energy is an inexhaustible and sustainable energy source for human beings. Making full and effective use of solar energy is an important way to solve the current energy crisis. The spectral range of solar energy is very wide. According to the experimentally measured solar radiation spectral distribution diagram, it can be found that the whole sunlight can be divided into ultraviolet light (wavelength less than 400nm, accounting for about 8.3%), visible light (wavelength is about 400-760nm, accounting for about 8.3%) 40.3%) and infrared light (wavelength greater than 760nm, accounting for about 51.4%). However, in practical applications, only a part of the light energy is used effectively. For example, in a solar cell, only those photons with energy greater than its forbidden band width can generate electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/00C09K11/06
Inventor 李承辉游效曾刘建
Owner NANJING UNIV
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