Preparation method and application of a zinc coordination polymer and its Congo red complex

A zinc coordination polymer, a technology of coordination polymers, applied in the fields of zinc organic compounds, chemical instruments and methods, photosensitive equipment, etc. Response properties, mild reaction conditions, simple post-processing effects

Active Publication Date: 2016-10-12
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the article only studies the selectivity and effect of dye adsorption and separation, but does not discuss the properties of the adsorbed coordination compounds and dye complexes.

Method used

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  • Preparation method and application of a zinc coordination polymer and its Congo red complex
  • Preparation method and application of a zinc coordination polymer and its Congo red complex
  • Preparation method and application of a zinc coordination polymer and its Congo red complex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1: Preparation of zinc coordination polymer.

[0051] Weigh zinc acetate dihydrate (44mg, 0.2mmol), phthalic acid dihydrate (42mg, 0.2mmol) and N,N'-bis(pyridin-3-yl)succinamide (27mg, 0.1mmol), add Put it into a 25mL heat-resistant reaction kettle, and then add an appropriate amount of 0.01M sodium hydroxide aqueous solution to the reaction kettle. After closing the reaction kettle, heat and react in an oven at 120°C for 2d. After the reaction, the temperature of the reaction system was slowly lowered to room temperature at a rate of 5 °C / h, and colorless crystals were obtained after 2 days. The crystals were filtered, washed with ethanol, dried in vacuum at 50° C., weighed and the yield was calculated. Yield: 55 mg, yield: 60% (calculated based on metallic zinc).

[0052] IR (potassium bromide tablet): ν=3357(w), 3078(w), 1684(m), 1609(s), 1586(s), 1559(s), 1484(s), 1449(s) ,1369(s),1340(m),1282(m),1256(m),1199(m),1179(m),879(m),833(m),797(s),781(s) ,703(s...

Embodiment 2

[0058] Example 2: Preparation of the complex of zinc coordination polymer and Congo red (adsorption of the complex to Congo red).

[0059] The zinc coordination polymer (40mg, 0.086mmol) prepared in Example 1 was ground for 1 hour, then added to an aqueous Congo red solution (50mL, 1g / L, 0.072mmol), and stirred at 400rpm. Draw the solution at different time intervals (0, 5min, 15min, 30min, 45min, 60min, 90min, 120min), centrifuge and filter the clear liquid, and measure the ultraviolet absorption spectrum after diluting the same multiple, such as Figure 4 shown. After stirring for 90 min, a red precipitate was obtained, which was centrifuged, washed with a small amount of water, dried in a vacuum oven at 50° C., weighed and the yield was calculated. After analysis, the chemical formula of the product is [Zn(1,2,3-BTA)(H 2 O)] (H 2 L) 0.5 ·0.75CR·6H 2 O, yield: 77.3 mg, yield: 85% (calculated based on metal zinc).

[0060] IR (potassium bromide tablet): ν=3605(w), 3185(...

Embodiment 3

[0065] Example 3: Photocurrent response test of the zinc coordination polymer and its complex with Congo red.

[0066] The specific steps of the photocurrent response test are as follows: Grind the products obtained in Example 1 and Example 2 respectively, and press each on a rectangular ITO glass, with an effective area of ​​about 0.785 cm 2 (One side is 1.0cm long). The ITO glass coated with the product was used as the working electrode, the platinum electrode was used as the auxiliary electrode, and the calomel electrode was used as the reference electrode, and placed in a quartz dish containing 100 mL of sodium sulfate solution (0.1 M). A 150W high-pressure xenon lamp was used as the light source, placed 15cm away from the ITO electrode, the electrode was excited for 0 to 400s, with an interval of 20s, and the voltage for photocurrent measurement was 0.5V.

[0067] The photocurrent corresponding test results are as follows Figure 7 As shown, the product obtained in Exam...

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Abstract

The invention discloses a preparation method and an application of zinc coordination polymer and Congo red complex thereof. Particularly, the zinc coordination polymer is anion-cation pair type coordination polymer, the chemical formula of the zinc coordination polymer is [Zn (1, 2, 3-BTA) (H2O)]*(H2L) 0.5*2H2O, biphenyl triformic acid is abbreviated as 1, 2, 3-H3BTA, the 1, 2, 3-BTA indicates a negative trivalent acid radical of the biphenyl triformic acid, N, N'-bi (pyridine-3-radical) succinamide is abbreviated as L, and the H2L indicates a positive divalent cation formed by combining the N, N'-bi (pyridine-3-radical) succinamide with two protons. The chemical formula of the complex formed by the zinc coordination polymer and Congo red is [Zn (1, 2, 3-BTA) (H2O)]*(H2L) 0.5*0.75 CR*6H2O, wherein the CR indicates Congo red molecules. The zinc coordination polymer is prepared under the solvent-thermal condition and structurally stable in water, has excellent selectivity and large adsorbing capacity for the Congo red, and can be used as a raw material for producing photovoltaic cells.

Description

technical field [0001] The invention belongs to the field of coordination chemistry, and relates to a preparation method and application of a zinc coordination polymer and its Congo red complex, in particular to a 1,2,3-benzenetricarboxylic acid, N,N'-bis( A zinc coordination polymer with pyridin-3-yl)succinamide as a ligand, its complex with Congo red, its preparation method, and its use in the preparation of photovoltaic cells. Background technique [0002] Organic dyes are widely used in plastics, papermaking, textile and other industries. Industrial wastewater rich in organic dyes has caused serious environmental pollution and endangered human health. How to efficiently and quickly remove organic dyes from industrial waste liquid, and use them to turn waste into treasure is a very important issue. [0003] At present, the treatment methods for waste liquid rich in organic dyes mainly include degradation and adsorption. The degradation pathway mainly uses a photosensiti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F3/06H01G9/20B01J20/22B01J20/30C02F1/28H01L51/46C09B67/00
CPCB01J20/226B01J20/3078C02F1/28C07F3/06C09B67/001H01G9/2059Y02E10/542Y02P70/50
Inventor 郎建平吴冰张文华任志刚
Owner SUZHOU UNIV
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