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Novel rare-earth praseodymium complex with capability of effective photodegradation of azo dye, and preparation method and application of complex

A technology of azo dyes and complexes, which is applied in the field of new rare earth praseodymium complexes and their preparation, and can solve the problems of difficult degradation of dyes

Active Publication Date: 2017-10-20
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a novel rare earth praseodymium complex and its synthesis method for effectively photodegrading azo dyes. The novel rare earth praseodymium complex has good stability and photocatalytic degradation of azo dyes (MB). The preparation method is simple, and it solves the problem that the dye is difficult to degrade

Method used

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  • Novel rare-earth praseodymium complex with capability of effective photodegradation of azo dye, and preparation method and application of complex
  • Novel rare-earth praseodymium complex with capability of effective photodegradation of azo dye, and preparation method and application of complex
  • Novel rare-earth praseodymium complex with capability of effective photodegradation of azo dye, and preparation method and application of complex

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Experimental program
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Effect test

Embodiment 1

[0044] 1) Add 0.12mmol Pr(NO 3 ) 3 ·6H 2 O, the mixture of 0.0168mmol 2,2'-bipyridine-4,4'-dicarboxylic acid, 0.008mmol 4,4'-bis(1H-imidazole-1-substituted)-1,1'-biphenyl, Put it into a polytetrafluoroethylene liner, and then add 5mL of a mixed solution of N,N-dimethylformamide and water (the volume ratio of N,N-dimethylformamide and water is 1:4), 25 Ultrasonic vibration at ℃ for 5 min;

[0045] 2) Put the reaction kettle with the above mixed solution into an oven, react at a constant temperature of 60°C for 48 hours, then naturally cool down to 31°C, and separate the solid and liquid;

[0046] 3) The above solid was washed several times with the mother liquor, and then dried naturally at 25° C. to obtain dark green cubic crystals with a yield of about 76.7%.

Embodiment 2

[0048] Carried out in the manner of Example 1, the yield was 74.3%, except that the reaction temperature in step 2) was 65°C.

Embodiment 3

[0050] Carried out in the manner of Example 1, the yield was 71.9%, except that the reaction temperature in step 2) was 70°C.

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Abstract

The invention belongs to the field of photocatalytic degradation of dyes, and particularly relates to a novel rare-earth praseodymium complex with capability of effective photodegradation of an azo dye, and a preparation method and an application of the complex. The preparation method comprises the steps pf introducing pyridine carboxylic acid aglucon with a coordination effect on a rare earth ion into a polymer side group, and then coordinating with Pr<3+> to form the novel rare-earth praseodymium complex with the capability of the photodegradation of the azo dye. A chemical formula of the complex is {[Pr(L<2>)1.5(DMF)(H2O)2](DMF)}n, wherein L<2> is a group of 2,2'-dipyridyl-4,4'-dicarboxylic acid with two protons removed; DMF is N,N-dimethylformamide; and n represents a natural number from 1 to positive infinity. The novel rare-earth praseodymium complex effectively solves the problem of the difficult degradation of the azo dye.

Description

technical field [0001] The invention relates to a praseodymium metal complex, in particular to a novel rare earth praseodymium complex capable of effectively photodegrading azo dyes and its preparation method and application. Background technique [0002] Coordination polymers, also known as metal-organic frameworks (Metal-Organic Frameworks, abbreviated as MO Fs), refer to the interaction between metal atoms or atomic clusters and organic ligands through covalent bonds, coordination bonds, and intermolecular interactions. A crystalline material with a periodic network structure formed by polymerization. [0003] Rare earth coordination chemistry is one of the research hotspots in the field of rare earth chemistry. Rare earths are the lanthanide elements in the periodic table of elements. Complexes. Rare earth complexes are complexes formed by rare earth metal ions and oxygen-containing, nitrogen-containing organic ligands through coordination and bonding. Rare earth compl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/00B01J31/22A62D3/176A62D101/26
CPCA62D3/176C07F5/003B01J31/1805B01J31/1815A62D2101/26C07B2200/13B01J35/39
Inventor 季长春白秀芳徐东浩尹丽盛恩宏
Owner ANHUI NORMAL UNIV
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