Photochromic/thermochromic material based on iodine cuprate hybrid and preparation of photochromic/thermochromic material

A color-changing material, photochromic technology, applied in the direction of color-changing fluorescent materials, organic chemistry, chemical instruments and methods, etc., can solve the problems of restricting the development of color-changing materials, no activity performance, single response factors, etc., to achieve rich varieties and colors, Fast photochromic and achromatic effects with extended application range

Active Publication Date: 2016-09-21
山西师范大学
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The reported photo / thermochromic hybrid materials mainly use 4,4′-bipyridine derivatives as strong electron acceptors, which are limited to a certain extent by the use of a single electron acceptor and the mismatch of donating and accepting capabilities. The types of electron donors (hard Lewis bases such as oxides and chlorides are the main ones), while soft Lewis bases such as iodides have no activity due to the so-called heavy atom effect, which seriously restricts this type of color-changing materials. development
[0003] Another problem worthy of attention is that currently reported photo / thermochromic hybrid materials generally have a slow response rate (usually greater than 5 minutes) and a relatively single color (mainly the color of 4,4′-bipyridyl derivative radicals) , Narrow response range (mainly concentrated in the ultraviolet region) and single external stimulus response factors (light or heat-induced discoloration is more common, light / heat-induced dual-function discoloration is less) and other issues

Method used

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  • Photochromic/thermochromic material based on iodine cuprate hybrid and preparation of photochromic/thermochromic material
  • Photochromic/thermochromic material based on iodine cuprate hybrid and preparation of photochromic/thermochromic material
  • Photochromic/thermochromic material based on iodine cuprate hybrid and preparation of photochromic/thermochromic material

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Experimental program
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Effect test

Embodiment 1

[0029] Add CuI (190mg, 1mmol), nicotinic acid niacin (68mg, 0.2mmol), NaI (750mg, 5mmol) and 45% hydroiodic acid (0.2mL, 1.05mmol) into 3mL of methanol solution, after stirring for 40 minutes, The bright yellow turbid liquid was obtained, which was transferred to a 15mL polytetrafluoroethylene-lined hydrothermal reaction kettle, placed in a 70°C oven for 4 days, and slowly cooled at room temperature to obtain brownish yellow rod-shaped crystals, which were filtered and washed with ethanol After drying. Yield: 26.2% (based on Cu).

Embodiment 2

[0031] Add CuI (380mg, 2mmol), nicotinic acid niacin (136mg, 0.4mmol), NaI (750mg, 5mmol) and 45% hydroiodic acid (0.4mL, 2.1mmol) into 5mL methanol solution, after stirring for 40 minutes, The bright yellow turbid liquid was obtained, which was transferred to a 15mL polytetrafluoroethylene-lined hydrothermal reaction kettle, placed in an oven at 80°C for 3 days, and slowly cooled at room temperature to obtain brownish-yellow rod-shaped crystals, which were filtered and washed with ethanol After drying. Yield: 29.5% (based on Cu).

Embodiment 3

[0033] Add CuI (190mg, 1mmol), nicotinic acid niacin (68mg, 0.2mmol), NaI (750mg, 5mmol) and 45% hydroiodic acid (0.5mL, 2.64mmol) into 5mL of methanol solution, after stirring for 40 minutes, The bright yellow turbid liquid was obtained, which was transferred to a 15mL polytetrafluoroethylene-lined hydrothermal reaction kettle, placed in a 70°C oven for 4 days, and slowly cooled at room temperature to obtain brownish yellow rod-shaped crystals, which were filtered and washed with ethanol After drying. Yield: 24.6% (based on Cu).

[0034] The determination of the crystal structure of the methyl nicotinic acid hydrazide iodocuprate hybrid obtained in Examples 1 to 3 is as follows: a single crystal with a suitable size is selected under a microscope for X-ray single crystal structure analysis. The X-ray diffraction data of the crystals were measured by a SMART APEXCCD single crystal diffractometer and irradiated with a graphite monochromator Mo-Kα Data were collected in ome...

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Abstract

The invention relates to the field of synthesis of organic-inorganic hybrid chromogenic materials, in particular to a photochromic/thermochromic material based on a methyl nicotinic hydrazide-iodine cuprate hybrid and preparation of the photochromic/thermochromic material. An in-situ generated methyl nicotinic hydrazide cation is taken as a structure-directing agent for guiding synthesis of the iodine cuprate hybrid with photochromic and thermochromic properties. According to the invention, the methyl nicotinic hydrazide cation and an iodine cuprate anionic framework are taken an electron acceptor and donor respectively, one photochromic/thermochromic difunctional material based on the methyl nicotinic hydrazide-iodine cuprate hybrid is provided, so that variety and color of a conventional chromogenic material are enriched, and the blank in the technical field is filled up. The photochromic/thermochromic material can respond to ultraviolet light and visible light besides response to low temperature to produce reversible thermochromism, photochromism and achromatism speeds are high, the photoresponse range is wide, the chromogenic contrast is high, the chromogenic performance of the conventional material is greatly improved, and the application range of the chromogenic material is broadened.

Description

technical field [0001] The invention relates to the field of synthesis of organic-inorganic hybrid color-changing materials, in particular to a photo / thermochromic material based on methyl nicotinic acid hydrazide iodocuprate hybrid and its preparation. Background technique [0002] Photo / thermochromic materials refer to a class of functional materials that can undergo reversible color changes under light and temperature stimuli, and have important practical or potential applications in the fields of display, protection, sensing, switching, energy conversion, and information storage. Application value has become one of the research hotspots in the field of functional material development today. In particular, the organic-inorganic hybrid color-changing materials based on electron donor-acceptor interactions have rich adjustability and good designability in terms of composition, structure and performance due to their good stimuli responsiveness and visual detectability. sex ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/02C07D213/82
CPCC07D213/82C09K9/02C09K2211/1029
Inventor 沈俊菊付云龙
Owner 山西师范大学
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