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Zinc coordination polymer and preparation method and application thereof

A zinc coordination polymer, a technology of coordination polymers, applied in chemical instruments and methods, instruments, analytical materials, etc., can solve the problems such as the inability of coordination polymer probes to exist stably, achieve high yield and purity, The effect of the production process is simple

Active Publication Date: 2020-06-19
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the fact that some coordination polymer probes cannot exist stably in water, they are greatly limited.

Method used

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

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Experimental program
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Embodiment 1

[0023] The preparation of embodiment 1 zinc coordination polymer

[0024] Weigh the Zn(NO 3 ) 2 ·6H 2 O (59.50mg, 0.20mmol) and DPBA (46.60mg, 0.10mmol) and 4,4'-bipyridine (15.60mg, 0.10mmol) were placed in a 23mL polytetrafluoroethylene reactor liner, and 6.00mL of distilled water was added , adjusted the pH to 5 with 0.50mol / L KOH, stirred at room temperature for 30 minutes, sealed it in a stainless steel reactor, reacted at a constant temperature in a temperature-controllable oven at 120°C for 72 hours, and cooled naturally to room temperature to obtain Colorless massive crystals meeting the requirements of X-ray testing were collected after repeated washing with distilled water and vacuum drying, with a yield of 53%.

Embodiment 2

[0025] The structure determination of embodiment 2 zinc coordination polymer

[0026] The crystal structure was determined using the Beijing Synchrotron Radiation 1W2B working line station light source For the incident radiation, the MAR165CCD detector, marccd and HKL2000 programs collected and restored the data, corrected by the least square method to obtain the unit cell parameters, and obtained the crystal structure from the difference Fourier electron density map using the direct method of SHELXL-2014 / 7, and obtained it by Lorentz and polarization effect correction, C and O atoms are hydrogenated using theory and fixed on the parent atom. The detailed crystal determination data are shown in Table 1, and the crystal structure is shown in figure 1 .

[0027] Table 1 Crystallographic data of coordination polymers

[0028]

Embodiment 3

[0029] Embodiment 3 powder diffraction analysis phase

[0030] The X-ray powder diffraction results show that the crystal sample has a uniform phase, and the experimental diffraction pattern is consistent with the powder diffraction pattern simulated based on the crystal structure, see figure 2 .

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Abstract

The invention relates to a zinc coordination polymer and a preparation method and application thereof. The simple structural formula of the coordination polymer is [Zn3 (mu3-Hbptc) 2 (mu2-4, 4 '-bpy)2 (H2O) 4] n.2nH2O, wherein H4bptc is 2, 3, 3', 4 '-biphenyltetracarboxylic acid, and 4, 4'-bpy is 4, 4 '-bipyridine. The coordination polymer is prepared by a hydrothermal method. The preparation method comprises the following steps: dissolving Zn (NO3) 26H2O, N, N '-di-(3-pyrazinyl)-4, 4'-phthalimide (DPBA) and 4, 4 '-dipyridyl into a proper amount of water according to the molar ratio of 2: 1:1; adjusting the pH value to 5 with 0.50 mol / L KOH, stirring for 30 min, carrying out a reaction in a polytetrafluoroethylene tube at 120 DEG C for 72 h, naturally cooling to room temperature to obtain colorless bulk crystals, washing with distilled water, and carrying out vacuum drying collection. Fluorescence of the coordination polymer in an aqueous solution can be selectively quenched by Cu <2 + > and Ni < 2 + >, i.e. a good fluorescence recognition effect on Cu < 2 + > and Ni < 2 + > can be realized, and the coordination polymer can be repeatedly used and can be used as a fluorescence sensor for efficiently detecting Cu < 2 + > and Ni < 2 + >, and the fluorescence detection limits are 0.0456 mu M and 0.0559 mu M respectively.

Description

technical field [0001] The present invention relates to metal coordination polymers, in particular to a transition metal based Zn 2+ , 2,3,3',4'-biphenyltetracarboxylic acid and 4,4'-bipyridine three-dimensional structure of the coordination polymer and its preparation method, and the coordination polymer as a fluorescent sensor in water Detection of Cu 2+ and Ni 2+ Applications. Background technique [0002] Transition metal ions play important roles in many biological systems and ecological environment processes. Among them, Cu 2+ As a catalyst cofactor for some key proteins involved in the growth and development of organisms, it is an essential trace element in biological systems. However, Cu 2+ Both the deficiency and the excess may lead to some serious neurodegenerative diseases, including Alzheimer's disease, Parkinson's syndrome and Wilson's disease, etc. Ni 2+ as a micronutrient in vitamin B 12 It plays a key role in the synthesis of phospholipids, but once ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008C09K11/06C09K2211/188G01N21/643G01N2021/6432
Inventor 冯思思郑欢卢丽萍
Owner SHANXI UNIV
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