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Nickel coordination polymer material with wide-temperature-range reversible thermochromic property and preparation method and application of nickel coordination polymer material

A technology of thermochromic materials and coordination polymers, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, thermometers, etc., can solve the problems of small color change and color difference, time-consuming recoloring process, poor material stability, etc., and achieve steps The effect of simplicity, obvious color change, and wide span of color change temperature range

Active Publication Date: 2020-05-08
NORTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the reported thermochromic properties of transition metal coordination polymer materials are either irreversible or reversible but require a tedious and time-consuming recoloring process.
Moreover, its use is limited due to the small color difference in color change or the poor stability of the material

Method used

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  • Nickel coordination polymer material with wide-temperature-range reversible thermochromic property and preparation method and application of nickel coordination polymer material
  • Nickel coordination polymer material with wide-temperature-range reversible thermochromic property and preparation method and application of nickel coordination polymer material
  • Nickel coordination polymer material with wide-temperature-range reversible thermochromic property and preparation method and application of nickel coordination polymer material

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Experimental program
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Embodiment 1

[0027] Embodiment 1: Complex {[Ni 2 (SO 4 ) 2 (H 3 tpb) 2 (H2 O) 2 ]·2H 2 O} n Synthesis

[0028] Add 0.395 g of nickel sulfate heptahydrate and 0.276 g of 1,3,5-(pyrazolyl)benzene into a mixed solution of methanol and water (volume ratio 4:1), and stir with a magnetic stirrer in air at room temperature for 10 minutes , and then transferred to a 25mL hydrothermal reaction kettle with a Teflon substrate and sealed, placed in an oven at 160°C and kept warm for 48 hours, and then cooled at room temperature. Get jade green transparent massive crystal {[Ni 2 (SO 4 ) 2 (H 3 tpb) 2 ·MeOH·H 2 O] MeOH H 2 O} n . Unit cell parameters: a=21.5743(Å), b=21.5743(Å), c=34.449(Å), α=90.000(deg), β=90.000(deg), γ=90.000(deg). Afterwards, the synthesized {[Ni 2 (SO 4 ) 2 (H 3 tpb) 2 ·MeOH·H 2 O] MeOH H 2 O} n At 250°C for 20 hours to remove the solvent molecules methanol and water, after cooling, place in the air to absorb water molecules in the air, and a thermochromic...

Embodiment 2

[0032] Embodiment 2: Complex {[Ni 2 (SO 4 ) 2 (H 3 tpb) 2 (H 2 O) 2 ]·2H 2 O} n Photo of temperature and color change

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Abstract

The invention discloses a wide-temperature-range reversibly thermochromic coordination polymer material and a preparation method and application thereof. The molecular formula of the coordination polymer material is {[Ni2(SO4)2(H3tpb)2(H2O)2].2H2O}n, wherein H3tpb is 1,3,5-(pyrazolyl)benzene. The coordination polymer material is prepared by adopting a solvothermal method. The specific preparationmethod comprises the following steps: dissolving nickel sulfate heptahydrate and 1,3,5-(pyrazolyl)benzene in a mixed solution of methanol and water, carrying out a solvothermal reaction at 120-180 DEGC for 2-5 days, and carrying out heat treatment on the obtained product to obtain the thermochromic material. According to the preparation method, synthesis steps are simple, and yield is high; and the prepared thermochromic material is good in thermal stability and chemical stability, wide in discoloration temperature range, short in color compounding time, obvious in color change and good in reversibility and can be used for temperature detection.

Description

technical field [0001] The invention relates to a reversible thermochromic material in a wide temperature range, a preparation method and application thereof, and belongs to the field of inorganic coordination polymer materials. Background technique [0002] Reversible thermochromic material means that when the material is heated, the visible absorption spectrum changes, that is, its color changes significantly, showing a new color, and when cooled, the color will also recover, and the color change has a reversible function. Material. This material has a wide range of applications, such as temperature detection, medical care, diagnosis, energy utilization, chemical anti-counterfeiting, daily decoration, aerospace and other fields. [0003] Coordination polymer materials are a class of crystalline materials composed of metal ions or metal clusters linked with organic ligands, and have the advantages of both inorganic and organic building blocks. Coordination polymer materia...

Claims

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Application Information

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IPC IPC(8): C08G83/00C09K9/02G01K11/14
CPCC08G83/008C09K9/02C09K2211/187G01K11/14
Inventor 张施慧张树雨岳可芬
Owner NORTHWEST UNIV
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