Rare earth complex and process for preparing the same

A technology of rare earth complexes and complexes, applied in chemical instruments and methods, compounds containing elements of Group 3/13 of the periodic table, organic chemistry, etc., can solve the problem of low luminous efficiency, inability of ligands to convert light, and short luminous lifetime and other problems, to achieve the effect of simple preparation process

Inactive Publication Date: 2006-07-19
DONGHUA UNIV
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] Such as complexes [Nd III (HFA) 3 ], 2-acetylbenzimidazole glycine Schiff base rare earth and other organic complexes, although these organic complexes are superior to inorganic optical materials in terms of processing performance, they all use organic compounds with conjugated large π bonds as complexes. body, some also introduce a second ligand, but because the ligand is a mixed valence bond of aromatic and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: 3, the synthesis of 5-dihydroxybenzoic acid methyl ester

[0028] In a 250ml three-necked bottle, add 50g of chemically pure 3,5-dihydroxybenzoic acid to a 100ml solution of methanol with a concentration of 99.7% by weight, that is, 3,5-dihydroxybenzoic acid with a weight percentage of 99.7% The molar ratio of methanol is 1:10, then add 0.1g of catalyst p-toluenesulfonic acid, the reaction temperature is 70°C, and the reaction time is 10 hours, the prepared liquid is then dissolved with 100ml of deionized water to dissolve its unreacted (3,5-dihydroxybenzoic acid and methanol), after stirring for 20 minutes, the layers were separated, and the lower oil layer was taken to obtain 3,5-dihydroxybenzoic acid methyl ester with a yield of 95%.

Embodiment 2

[0029] Example 2: Ligand M 1 Synthesis

[0030]Put the above-mentioned 14mmol of 3,5-dihydroxybenzoic acid methyl ester and 28mmol of chemically pure terephthaloyl chloride into 99.7% by weight concentration of N,N-dimethylformamide solvent 50ml, and dropwise add React with 2.5ml of chemically pure pyridine liquid, the reaction temperature is 95°C, and the reaction time is 8 hours, until no HCl is released; the reaction solution is cooled to room temperature and then poured into deionized water, and the stirring time is 15 minutes to obtain a white powder; The white powder was repeatedly washed with deionized water for 3 times, filtered and dried to obtain the ligand M 1 .

Embodiment 3

[0031] Embodiment 3: rare earth europium complex [Eu 2 m 1 (M 2 ) 2 Preparation of R]

[0032] A. the oxide of rare earth metal europium is dissolved in HCl, and the mol ratio with the oxide of rare earth europium and hydrochloric acid is 1: 15, and dissolution temperature is 40 ℃, and the time is 20 minutes, makes europium trichloride solution, will It is dried; 6 millimoles of europium trichloride is added to 30 ml of ethanol solution with a concentration of 99.7% by weight to form solution 1;

[0033] B. Dissolving 6 mmoles of chemically pure 1,10-phenanthroline in 20 ml of ethanol solution with a concentration of 99.7% by weight to obtain solution 2;

[0034] C. Add 3 mmol of ligand M 1 Mix with solvent dimethyl sulfoxide 40ml of 99.7% ligand by weight, and stir for 15 minutes until the ligand M 1 Completely dissolved, and with alkaline solution ammonia, the P H The value was adjusted to 7 to obtain solution 3.

[0035] D. Mix 30ml of solution 1 and 20ml of solutio...

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Abstract

The related rare-earth complex has structural formula as Ln2M1(M2)2R with two trivalent Ln as central ions and ligand M contained M1 as 3,5-bi(4-carboxylbenzoate)phenyl benzoate and M2 as 1, 10-orthophenanthroline(phen) and R as solvent. Wherein, the reaction needs 5-20h at 20-80Deg. This invention can be used as luminous complex with high efficiency, intensity and stability.

Description

technical field [0001] The present invention relates to a kind of rare earth complexes and preparation method thereof, particularly to a kind of 3,5-di(4-carboxybenzoate) methyl benzoate rare earth complexes and preparation method thereof, the rare earth complexes can be used as Photoelectric functional materials used in various fields such as agriculture, biology, electrical engineering and electronics. Background technique [0002] Rare earth complexes are a kind of coordination compounds formed by the ligand M surrounding the central rare earth metal ion Ln. Since the rare earth metal ions contained in the complex have a special 4f electron layer structure, when the rare earth metal ion is excited by a certain wavelength of light After the organic complex is formed, the organic ligands in it absorb radiation energy, causing the rare earth electrons to produce fluorescence due to energy level transitions. Therefore, rare earth complexes are a kind of luminescent materials...

Claims

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Application Information

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IPC IPC(8): C07F5/00
Inventor 西鹏顾晓华倪士民刘婷黄象安
Owner DONGHUA UNIV
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