Zinc coordination polymer as well as preparation method and application thereof

A zinc coordination polymer and reaction technology, applied to zinc coordination polymer, its preparation and application fields, can solve problems such as low recycling rate, and achieve the effects of reducing degradation time, stable structure and improving catalytic performance

Active Publication Date: 2014-10-15
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Zhang Jian publicly reported two two-dimensional coordination polymers of monovalent copper, which are isomers and p-methyl blue, rhodamine B and methyl orange have good catalytic photodegradation performance, and the two coordination polymers can be recycled for the three dyes (see: Tian Wen, De Xiang Zhang, Jian Zhang, Inorg. Chem. 2013, 52, 12 to 14); however, its recycling rate is low in the photocatalytic degradation of rhodamine B

Method used

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  • Zinc coordination polymer as well as preparation method and application thereof
  • Zinc coordination polymer as well as preparation method and application thereof
  • Zinc coordination polymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment one: the synthesis of zinc coordination polymer

[0043] Take zinc nitrate hexahydrate Zn(NO 3 ) 2 ·6H 2 O (0.030g, 0.1mmol), 1,3-H isophthalic acid 2 BDC (0.016g, 0.1mmol) and tetrakis[4-(1-imidazolyl)phenyl]methane (0.029g, 0.05mmol) were placed in an 8mL heat-resistant glass tube, and 3mL of a mixed solvent with a volume ratio of 1:1 was added After blocking with acetonitrile / water. React in an oven at a constant temperature of 150°C for 2 days, slowly lower to room temperature at a rate of 5°C / hour, filter, wash with distilled water, and dry to obtain a yellow crystal as product 1, which is a zinc coordination polymer with the molecular formula C 53 h 36 N 8 o 8 Zn 2 .

[0044] Product 1 is carried out infrared analysis, and the result is as follows:

[0045] IR:v(KBr) / cm -1 3447m, 3136w, 1613s, 1561w, 1523s, 1373s, 1313w, 1270w, 1126w, 1068m, 966m, 827m, 762s, 656m, 561m.

[0046] The structure of the product 1 was analyzed by X-ray single cr...

Embodiment 2

[0050] Embodiment two: the synthesis of the zinc coordination polymer of Co ion doping

[0051] Zinc coordination polymer C 53 h 36 N 8 o 8 Zn 2 placed in cobalt nitrate Co(NO 3 ) 2 ·6H 2 O in acetonitrile / water mixed solution, sealed in a heat-resistant glass tube, kept in an oven at 80°C for 24 hours, filtered, washed with distilled water, and dried to obtain an orange compound, which is a zinc coordination polymer doped with cobalt ions , the molecular formula is C 53 h 36 N 8 o 8 Zn 1.952 co 0.048 . ICP analysis found that the cobalt ion-doped zinc coordination polymer contained 97.60% Zn 2+ and 2.40% Co 2+ . Zinc coordination polymer C doped with cobalt ions 53 h 36 N 8 o 8 Zn 1.952 co 0.048 Carry out infrared analysis, the result is as follows:

[0052] IR:v(KBr) / cm -1 3445m, 3133w, 1615s, 1562w, 1523s, 1373s, 1314w, 1270w, 1126w, 1068m, 966m, 826m, 762s, 656m, 561m.

[0053] Using X-ray single crystal diffraction to study the cobalt ion-doped zi...

Embodiment 3

[0057] Example 3: Photodegradation of Rhodamine B Catalyzed by Zinc Coordination Polymer

[0058] Take 10 mg of zinc coordination polymer C 53 h 36 N 8 o 8 Zn 2 Concentration in 50mL is 3×10 -4 mol L -1 In the rhodamine B aqueous solution, the catalytic photodegradation reaction was carried out under a 400W ultraviolet lamp, and 1mL was sampled every 30min, diluted to 10mL with distilled water to measure the ultraviolet absorption. attached image 3 It is the ultraviolet absorption spectrogram of the rhodamine B aqueous solution. It can be seen that it takes 240 minutes for the zinc coordination polymer to catalyze the photodegradation of rhodamine B.

[0059] After the degradation was completed, the zinc coordination polymer was recovered by filtration, washing, and drying, and the experiment of catalytic photodegradation of rhodamine B was carried out again. attached Figure 4 It is the change figure of the concentration of cycle number and rhodamine B, and the ordi...

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Abstract

The invention discloses a zinc coordination polymer as well as a preparation method and application thereof. According to the method, under a solvothermal condition, a zinc complex is prepared firstly, and then is doped with a small amount of cobalt ions, so that a doped complex is obtained. Compared with conventional method, the method disclosed by the invention has the advantages that a zinc complex catalyst doped with the small amount of cobalt ions is better in the reaction effect of catalyzing and light-degrading Rhodamine B, can realize recycling, and keep relatively high catalytic efficiency.

Description

technical field [0001] The invention relates to a preparation method of a coordination polymer and its application in catalytic photodegradation, in particular to a zinc coordination polymer, its preparation method and its application in catalytic photodegradation of rhodamine B. Background technique [0002] In recent years, with the strengthening of people's awareness of environmental protection, catalytic photodegradation of pollutants has become a very active research direction in the field of photochemistry. Among them, organic dye molecules, such as rhodamine B (Rhodamine B), also known as rose red B, or basic rhodamine, commonly known as flower pink, are a kind of artificially synthesized dyes with bright pink color. Experiments on mice have found that rhodamine B can cause sarcoma in subcutaneous tissue and is suspected to be a carcinogen. Rhodamine B has strong fluorescence in solution, and it is used as cell fluorescence staining agent in the laboratory, colored g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F19/00C07F3/06B01J31/22C02F1/32C02F101/38
Inventor 郎建平李端秀
Owner SUZHOU UNIV
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