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Cd-MOF complex as well as preparation method and application thereof

A complex and coordination technology, applied in chemical instruments and methods, instruments, analytical materials, etc., can solve the problems of easy decomposition, high synthesis cost, poor stability, etc., and achieve the effects of avoiding pollution, simple operation, and high crystallinity

Active Publication Date: 2020-07-31
YANAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the existing fluorescent Cd-MOFs materials have poor stability in water and are easy to decompose, resulting in the inability of further applications. Some ligands are expensive, resulting in high synthesis costs, which is not conducive to practical applications.

Method used

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  • Cd-MOF complex as well as preparation method and application thereof
  • Cd-MOF complex as well as preparation method and application thereof
  • Cd-MOF complex as well as preparation method and application thereof

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preparation example Construction

[0035] The present invention provides a preparation method of the Cd-MOF complex described in the above technical scheme, which includes the following steps:

[0036] Mixing cadmium nitrate, 2,3,3',5,5'-diphenyl ether pentacarboxylic acid, 2,2'-dipyridine and water to carry out a coordination reaction to obtain a coordination reaction product;

[0037] The coordination reaction product is cooled and then crystallized to obtain a Cd-MOF complex.

[0038] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0039] In the present invention, cadmium nitrate, 2,3,3',5,5'-diphenyl ether pentacarboxylic acid, 2,2'-dipyridine and water are mixed to carry out coordination reaction to obtain coordination reaction product.

[0040] The present invention does not specifically limit the source of the 2,3,3',5,5'-diphenyl ether pentacarboxylic acid, as long as it is a commercially available prod...

Embodiment 1

[0069] Cd(NO 3 ) 2 ·4H 2 O (0.0616g, 0.2mmol), 2,3,3',5,5'-diphenyl ether pentacarboxylic acid (DEPA, 0.0390g, 0.1mmol) and 2,2'-bipyridine (2,2 '-Bpy, 0.0312g, 0.2mmol) was placed in a 25mL hydrothermal reactor lined with polytetrafluoroethylene, 10mL of water was added, and the pH value of the mixed system was adjusted to 6.0 with 0.5mol / L NaOH solution at room temperature After stirring for 30 minutes under the conditions, place it in an electric thermostatic blast drying oven to raise the temperature to 160°C, then react at a constant temperature for 72 hours, then cool down to 80°C at a rate of 10°C / h, then crystallize at a constant temperature for 8 hours, naturally cool to room temperature, filter The solid product obtained is washed with water to obtain the Cd-MOF complex (Cd 2 2+ (DEPA) 4- (2,2′-bpy)·3H 2 O (flaky yellow crystals, 0.03696g (in Cd 2+ Calculate), yield 60%, purity 93%).

[0070] (1) Structural features:

[0071] The Cd prepared in this example 2 2+ (DEPA) 4...

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Abstract

The invention provides a Cd-MOF complex as well as a preparation method and application thereof, and belongs to the technical field of metal organic framework materials. The chemical composition of the Cd-MOF complex provided by the invention is Cd2<2+> (DEPA)<4->(2, 2 '-bpy). 3H<2>O. Each asymmetric unit in the Cd-MOF complex provided by the invention contains two crystallographically independentCd < 2 + >, an incompletely deprotonated ion of 2, 3, 3 ', 5, 5'-diphenyl ether pentacarboxylic acid, a 2, 2 '-dipyridyl and three coordinated water molecules. The Cd-MOF complex provided by the invention is relatively high in fluorescence quenching rate on metal ions and small organic molecules, and can realize fluorescence detection on the metal ions and the small organic molecules.

Description

Technical field [0001] The invention relates to the technical field of metal organic framework materials, in particular to a Cd-MOF complex and a preparation method and application thereof. Background technique [0002] In the past few decades, with the rapid growth of modern industry, more and more harmful chemical pollutants have been released into the environment, including heavy metal ions, volatile organic reagents and toxic gases, which are harmful to people’s health and life. Causing serious adverse effects, chromatography and its combined technology are the most commonly used methods to determine environmental pollutants. However, chromatography-based techniques usually require expensive equipment, complicated pretreatments, and long test times. Therefore, it is very urgent and necessary to establish a simple, easy-to-use, highly selective, highly sensitive and effective new sensing method for harmful substances such as organic molecules and metal ions for environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008C09K11/06C09K2211/188G01N21/64G01N21/6428G01N21/643G01N2021/6432G01N2021/6497
Inventor 杨华张恩生陈小莉崔华莉刘琳王记江
Owner YANAN UNIV
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