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Hydrogen bond type rare-earth metal complexes and preparation method thereof

A technology of rare earth metals and rare earth metal ions, applied in botany equipment and methods, chemical instruments and methods, chemicals for biological control, etc., can solve the problems of low thermal stability and easy decomposition, and achieve antibacterial Effects of long aging, mild process conditions, and convenient operation

Inactive Publication Date: 2009-06-17
SHANGHAI HUAMING HI TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the thermal stability is not high, and it is easy to decompose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]Take by weighing yttrium chloride 0.1175g and be dissolved in 10mL water and make solution (A1), 0.3010g pyridine-2,6-dicarboxylic acid (pydcH 2 ) was dissolved in 30 mL of water at 80°C to prepare a solution (B1), and 0.1965 g of 2,6-diamino-pyridine (pyda) was dissolved in 10 mL of water to prepare a solution (C1).

[0046] The solution (B1) and the solution (C1) were mixed, stirred at 80° C. for 30 min, and then the solution (A1) was added dropwise thereto. After the above mixed solution was stirred for 4 h, it was allowed to stand at room temperature for 24 h. Filtrate, wash, and dry under vacuum at 60°C to obtain the hydrogen-bonded rare earth metal complex Y (pydc) 3 (pyda·H) 3 ·5H 2 O. With other rare earth metal ions RE 3+ replace Y 3+ , can be prepared according to the above general formula RE x M' y M" z ·nH 2 Hydrogen-bonding rare earth metal complexes of O.

Embodiment 2

[0048] (1) Ligand (pydc) 2- (pyda·H 2 ) 2+ Synthesis

[0049] A solution of 2,6-diamino-pyridine (pyda) (2.0 mmol) and triethylamine (4.0 mmol) in tetrahydrofuran (THF) (50 mL) was added dropwise to pyridine-2,6-dicarboxylic acid (pydcH 2 ) (2.0 mmol) in tetrahydrofuran (THF) (50 mL), stirred for 15 min. Then heated to reflux for 8h. After the reaction mixture was cooled, it was stirred at room temperature for 12 hours to obtain a yellow turbid liquid, which was left to stand, filtered, washed, and dried to obtain a yellow solid powder (pydc) 2- (pyda·H 2 ) 2+ .

[0050] (2) Preparation of rare earth complexes

[0051] Weigh 0.1655g of yttrium nitrate and dissolve it in 10mL water to make a solution (A2), weigh the above ligand (pydc) 2- (pyda·H 2 ) 2+ 0.4980g was stirred and dissolved in 30mL water at 60°C to prepare a solution (D2). Then solution A2 was added dropwise to solution D2, stirred at 60° C. for 4 h, and left standing at room temperature for 24 h. Filt...

Embodiment 3

[0053] Take by weighing yttrium nitrate 0.1655g and be dissolved in 10mL water and make solution (A3), take by weighing the part (pydc) among the embodiment 2 2- (pyda·H 2 ) 2+ 0.3324g was stirred and dissolved in 30mL water at 60°C to prepare a solution (D3). Then solution A3 was added dropwise to solution D3, stirred at 60° C. for 4 h, and allowed to stand at room temperature for 24 h. Filtrate, wash, and dry under vacuum at 60°C to obtain the hydrogen-bonded rare earth metal complex Y 2 (pydc) 4 (pyda·H) 2 10H 2 O. With other rare earth metal ions RE 3+ replace Y 3+ , can be prepared according to the above general formula RE x M' y M" z ·nH 2 Hydrogen-bonding rare earth metal complexes of O.

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Abstract

The invention provides a hydrogen-bonded rare earth metal complex and a method for preparing the same. The structural general formula of the hydrogen-bonded rare earth metal complex is RExM'yM'z.nH2O. The invention synthesizes and prepares the rare earth metal organic complex by molecular structures. The rare earth metal and the organic ligand complex have cooperative antibacterial function, thus the synthesized rare earth metal organic complex has the advantages of high antibacterial efficiency, wide antimicrobial spectrum, long antibacterial aging, and so on, and has better antibacterial function on colon bacillus, Staphylococcus aureus, and so on, and can be applied to industries of chemical antimicrobial. Moreover, the synthetic method has mild technological conditions, simple equipment and convenient operation.

Description

technical field [0001] The invention relates to a hydrogen-bonding rare earth metal complex and a preparation method thereof, in particular to a hydrogen-bonding rare earth metal complex containing pyridinedicarboxylic acid ligands and a preparation method thereof. Background technique [0002] Rare earth elements include scandium, yttrium, and lanthanides, a total of 16 elements. Because they have the same ionic charge and close radius, their properties are very similar. [0003] Rare earth salts and their complexes can be used as materials such as luminescence, magnetism, catalysis, gas sensing, and superconductivity, and are widely used in many fields of industrial production and scientific research. Rare earth compounds are widely used in medicine, agriculture, biochemistry and the environment. The application of purification and other aspects is a new field, especially in the aspect of antibacterial materials, rare earth salts and their organic complexes have attracted ...

Claims

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Application Information

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IPC IPC(8): C07F5/00A01N55/02A01P1/00
Inventor 蔡梦军陈建定吴秋芳马新胜杨景辉李福清
Owner SHANGHAI HUAMING HI TECH GRP
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