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Polyoxometallate compound containing tetranuclear cadmium cluster and preparation method and application thereof

A technology of oxo-salt compounds and polymetals, which is applied in the field of poly-oxo-metal salt compounds containing tetranuclear cadmium clusters and its preparation, can solve the problems of no fluorescence detection of PAHs, etc.

Active Publication Date: 2021-01-05
TAIYUAN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no relevant report on fluorescence detection of PAHs in the prior art

Method used

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  • Polyoxometallate compound containing tetranuclear cadmium cluster and preparation method and application thereof
  • Polyoxometallate compound containing tetranuclear cadmium cluster and preparation method and application thereof
  • Polyoxometallate compound containing tetranuclear cadmium cluster and preparation method and application thereof

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[0032] The present invention provides the preparation method of the tetranuclear cadmium cluster-containing polyoxometalate compound described in the above technical scheme, comprising the following steps:

[0033] Mixing tungstate, cadmium salt, arsenic-containing precursor and amine to obtain a suspension, the arsenic-containing precursor being arsenite or arsenate;

[0034] Adjust the pH value of the suspension to 4.50-6.50 with a pH regulator, and then perform a solvothermal reaction to obtain the polyoxometalate compound containing tetranuclear cadmium clusters; the cadmium salt or the pH regulator contains chlorine element.

[0035] In the present invention, unless otherwise specified, the required preparation materials are commercially available products well known to those skilled in the art.

[0036] In the present invention, the tungstate is preferably sodium tungstate (Na 2 WO 4 ) or potassium tungstate (K 2 WO 4 ); the cadmium salt preferably includes cadmium ...

Embodiment 1

[0044] 4.00g Na 2 WO 4 , 2.00g NaAsO 2 and 2.52g CdCl 2 Dissolve in water (150mL), stir and mix at 300r / min to obtain a suspension; add 8mL of 1,2-propylenediamine dropwise into the above mixture, stir and mix well, and use hydrochloric acid (6mol / L) Adjust the pH of the suspension to 5.66.

[0045] Take 15 mL of the suspension and pour it into a reaction kettle, and react at 150° C. for 3 days; after the reaction is completed, the resulting material is naturally cooled to room temperature to obtain colorless transparent crystals (polyoxometalate compounds containing tetranuclear cadmium clusters) , the chemical formula is (H 2 dap) 6 [Cd 4 Cl 2 (AsW 9 o 34 ) 2 ], denoted as CdAW; The yield is 40%.

Embodiment 2

[0047] 4.00g Na 2 WO 4 , 3.20g Na 3 AsO 4 and 2.52g CdCl 2 Dissolve in water (150mL), stir and mix at 600r / min to obtain a suspension; add 8mL of 1,3-propylenediamine dropwise into the above mixture, stir and mix well, and use nitric acid (6mol / L) Adjust the pH of the suspension to 5.80.

[0048] Take 15 mL of the suspension and pour it into a reaction kettle, and react at 130° C. for 5 days; after the reaction is completed, the resulting material is naturally cooled to room temperature to obtain colorless transparent crystals (polyoxometalate compounds containing tetranuclear cadmium clusters) , the chemical formula is (H 2 dap) 6 [Cd 4 Cl 2 (AsW 9 o 34 ) 2 ], the yield was 35%.

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Abstract

The invention belongs to the technical field of polyoxometallate compounds, and particularly relates to a polyoxometallate compound containing a tetranuclear cadmium cluster and a preparation method and application thereof. The chemical formula of the cadmium cluster substituted polyoxometallate compound provided by the invention is (H2dap) 6 [Cd4Cl2 (AsW9O34) 2], and the compound is sandwich typetransition metal substituted polyoxometallate constructed by a tetranuclear cadmium cluster and arsenic molybdate with a three-vacancy Keggin structure; the tetranuclear cadmium cluster polyoxometallate compound provided by the invention has fluorescence enhancement response property and a polycyclic aromatic hydrocarbon recognition function in an alcohol solvent, can be used for preliminary screening detection of polycyclic aromatic hydrocarbon in a chemical solution, and has a relatively great application prospect.

Description

technical field [0001] The invention relates to the technical field of fluorescence recognition of polyoxometalate compounds and polycyclic aromatic hydrocarbon compounds, in particular to a polyoxometalate compound containing tetranuclear cadmium clusters and a preparation method and application thereof. Background technique [0002] Polyoxometalates (Polyoxometalates, POMs) is a kind of coordination compound with special structure, which has a wide range of applications in industrial catalysis, optical materials, medical science, storage materials, mechanical engineering and many other fields. Recently, a number of studies have found that the coordination compounds with fluorescent functions constructed by metal ions such as zinc and cadmium have very broad application prospects in the identification of dangerous goods, explosives, and industrial raw materials. [0003] Polycyclic aromatic hydrocarbons (Polycyclic Aromatic Hydrocarbons, PAHs) are hydrocarbons produced duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/00C07C211/10C07C211/11C09K11/06G01N21/64
CPCC07C211/10C07C211/11C07C209/00C09K11/06G01N21/643C07B2200/13C09K2211/10G01N2021/6439
Inventor 马翔滑继爱卞俣健杨超慧冯晓引
Owner TAIYUAN INST OF TECH
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