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Red fluorescent cadmium coordination polymer, preparation method and application thereof

A cadmium coordination polymer and a technology for coordination polymers, which are applied in the field of red fluorescent cadmium coordination polymers, can solve the problems of large differences in luminescence properties, unpredictability and the like, and achieve the effect that the preparation method is simple and feasible.

Active Publication Date: 2019-10-25
CHONGQING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The exact relationship between structure and performance has always been a difficult research problem in materials science. Ligand structure, metal ion type, coordination mode, space structure, guest molecules, etc. are the keys to the performance of coordination polymers; It is a dark box, and it is difficult to predict. Even if the ligand and the metal ion are exactly the same, but the spatial structure is different (the way the microscopic atoms are connected), the luminescent performance may vary greatly, so the result is generally not what you want.

Method used

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  • Red fluorescent cadmium coordination polymer, preparation method and application thereof
  • Red fluorescent cadmium coordination polymer, preparation method and application thereof
  • Red fluorescent cadmium coordination polymer, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Example 1 Preparation of the coordination polymer of the present invention

[0037] Take the material according to the following specific mass or volume: Htpc (27.7mg, 0.1mmol), H 3 ntb(37.7mg,0.1mmol), Cd(NO 3 ) 2 ·4H 2 O(46.3mg, 0.15mmol), HNO 3 (30uL, 7mol / L, 0.21mmol), CH 3 CN(4mL), H 2 O (6mL).

[0038] Place the above materials in a 25mL reaction kettle, stir for 0.5h, and place the reaction system in a 160℃ constant temperature oven. After 5 days of reaction, cool to room temperature naturally. Red massive crystals are observed, which are filtered from the mother liquor and washed with distilled water , Naturally dry.

[0039] Perform X-ray single crystal diffraction analysis on the obtained target product to obtain its crystal structure ( figure 1 ). Bridging ligand tpc - (Formula III) and Hntb (Formula V) coordinately bond to Cd 2+ Ions form two-dimensional coordination polymers (attached figure 1 ), the structure contains a rare W-shaped macrocycle. The powder diff...

Embodiment 2

[0051] Example 2 Preparation of cadmium coordination polymer of the present invention

[0052] Take the material according to the following specific mass or volume: Htpc (27.7mg, 0.1mmol), H 3 ntb(37.7mg,0.1mmol), Cd(NO 3 ) 2 ·4H 2 O(30.8mg, 0.1mmol), HNO 3 (20uL, 7mol / L, 0.14mmol), CH 3 CN(2mL), H 2 O (8mL).

[0053] The above materials were placed in a 25mL reaction kettle, stirred for 0.5h, reacted in a constant temperature oven at 140°C for 5 days, and then cooled to room temperature naturally to obtain crystals, which were filtered from the mother liquor, washed with distilled water, and dried naturally.

[0054] The product was characterized by X-ray powder diffraction, and the data obtained was similar to that of Example 1, indicating that the crystal structure prepared in Example 2 did not change and the product was relatively pure.

[0055] Repeat this embodiment many times, and get {[Cd 3 (H 2 O) 2 (tpc) 2 (Hntb) 2 ](H 2 O)} n Based on the amount of Htpc, the calculated produ...

Embodiment 3

[0056] Example 3 Preparation of cadmium coordination polymer of the present invention

[0057] Take the material according to the following specific mass or volume: Htpc (27.7mg, 0.1mmol), H 3 ntb(11.3mg,0.03mmol), Cd(NO 3 ) 2 ·4H 2 O(61.7mg, 0.2mmol), HNO 3 (80uL, 7mol / L, 0.56mmol), CH 3 CN(5mL), H 2 O (5mL).

[0058] The above materials were placed in a 25mL reaction kettle, reacted in a constant temperature oven at 150°C for 6 days, and then naturally cooled to room temperature to obtain red crystals, which were filtered from the mother liquor, washed with distilled water, and naturally dried.

[0059] The product was characterized by X-ray powder diffraction, and the data obtained was similar to that of Example 1. It shows that the crystal structure obtained in Example 3 has not changed and the product is relatively pure.

[0060] Repeat this embodiment many times, and actually produce {[Cd 3 (H 2 O) 2 (tpc) 2 (Hntb) 2 ](H 2 O)} n Based on the amount of Htpc, the calculated produc...

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Abstract

The invention relates to the field of colored fluorescent materials, in particular to a red fluorescent cadmium coordination polymer. The chemical constitution of the red fluorescent cadmium coordination polymer is {[Cd<3>(H<2>O)<2>(tpc)<2>(Hntb)<2>](H2O)}<n>, the red fluorescent cadmium coordination polymer is a two-dimensional coordination polymer formed by an organic ligand bonded with Cd<2+>,and a rare W-shaped large ring is contained in the structure. The invention further provides a preparation method of the polymer, the yield can reach 49%, the polymer is stable in common solvents suchas water, ethyl alcohol, acetonitrile and DMF, the thermostability is high, and the polymer presents wine red under natural light and 365 nm of ultraviolet light; the polymer is excited by 415 nm oflight, and red fluorescence emission peak occurs at 596 nm, the polymer is the red fluorescent material, and the novel object can be used for preparing photosensitive composite materials such as printing ink, coatings and pigment, and detecting MoO42-anion ultraviolet-visible spectrum and fluorescence spectra of part of kation.

Description

Technical field [0001] The invention relates to the field of colored fluorescent materials, in particular to a red fluorescent cadmium coordination polymer, its preparation method and application. Background technique [0002] Colored fluorescent materials (CFMs) are unique, bright, and rare photosensitive materials that can reflect part of visible natural light, but also absorb ultraviolet light or short-wavelength light and convert it into light of the same color. The color is the same or similar under ultraviolet light. In comparison, red fluorescent materials are the most important category. Currently, the most commonly used are organic colored fluorescent materials such as azo red, alizarin red (1,2-dihydroxyanthraquinone), carmine, etc., whose natural light and It appears red under ultraviolet light, but the organic structure determines its poor heat resistance and light resistance, and strong migration, so it is not suitable for surface coating materials. The strong dema...

Claims

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Application Information

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IPC IPC(8): C08G83/00G01N21/33G01N21/64
CPCC08G83/008G01N21/33G01N21/643G01N2021/6432
Inventor 黄坤林张如意陈新郭媛媛吴越夏刚
Owner CHONGQING NORMAL UNIVERSITY
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