Photochromic material and preparation method thereof

A technology of photochromic materials and substances, which is applied in the field of photochromic materials and their preparation, can solve the problems of not being able to meet the needs of the market and limited photochromic materials, and achieve the advantages of simple operation, fast response and high stability. Effect

Pending Publication Date: 2021-12-07
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, photochromic materials that meet the absorption band in the visible region, can achieve fast photoresponse speed, high sensitivity, and have practical application value are very limited, especially in both solution and solid state. There are very few materials with reversible discoloration phenomenon, which cannot meet the needs of the market

Method used

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  • Photochromic material and preparation method thereof
  • Photochromic material and preparation method thereof
  • Photochromic material and preparation method thereof

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preparation example Construction

[0046] A preparation method of the photochromic material described in any one of the above, comprising the following steps:

[0047] The host substance and the guest substance are dissolved in water at a molar ratio of 1:1 or 1:2, heated, and the host substance and the guest substance in the solution form a host-guest compound through self-assembly to obtain a photochromic material in the form of a solution.

[0048] Preferably, the heating specifically includes: heating and reacting at 40-100° C. for 1-2 hours.

[0049] Preferably, it also includes concentrating and drying the photochromic material in the form of solution to obtain the photochromic material in solid form.

[0050] Preferably, the photochromic material in the form of solution is concentrated and dried by an evaporator.

[0051] The present application also provides a preparation method of the above-mentioned photochromic material. The host substance and the guest substance are dissolved in water according to ...

Embodiment 1

[0054] Weigh 9 mg (0.005 mmol) of eight-membered cucurbit ring Q[8] and 2.4 mg (0.005 mmol) of 1,1'-bis(4-carboxyphenyl)-(4,4'-bipyridinium) dichloride , added to 10mL distilled water, heated and reacted at 60°C for 1h, and cooled to room temperature to obtain the liquid photochromic material, the concentration of the liquid photochromic material is 5.00×10 -4 mol / L.

[0055] The liquid photochromic material prepared in embodiment 1 is irradiated under the ultraviolet lamp of 365nm, and the obtained ultraviolet absorption spectrum figure is as follows: figure 1 As shown, the discoloration before and after irradiation is as follows figure 2 Shown (A is before lighting, B is after lighting).

Embodiment 2

[0057] Weigh 9 mg (0.005 mmol) of eight-membered cucurbit ring Q[8] and 2.4 mg (0.005 mmol) of 1,1'-bis(4-carboxyphenyl)-(4,4'-bipyridinium) dichloride , added to 10 mL of distilled water, heated at 60°C for 1 h, concentrated and dried with a rotary evaporator to obtain a solid photochromic material.

[0058] The solid photochromic material prepared in embodiment 2 is irradiated under a 365nm ultraviolet lamp, and the discoloration situation before and after irradiation is as follows: image 3 Shown (A is before illumination, B is after illumination); Gained solid ultraviolet absorption spectrogram is as Figure 4 As shown,.

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Abstract

The invention discloses a photochromic material which is composed of a subject substance and an object substance according to the molar ratio of 1: 1 or 1: 2. The subject substance is cucurbit [8] uril or cucurbit [10] uril; the object substance is a viologen compound. The invention further provides a preparation method of the photochromic material. The photochromic material provided by the invention is high in response speed and high in stability, the response wavelength range is 350-1400 nm, and the photochromic material can have a rapid and sensitive photoinduced reversible color change phenomenon in both the liquid form and the solid form. The preparation method provided by the invention is simple and convenient to operate.

Description

technical field [0001] The present application relates to the technical field of material chemistry, in particular to a photochromic material and a preparation method thereof. Background technique [0002] Photochromic materials refer to a class of materials that can change color after being excited by a light source. Usually, the molecular structure of certain compounds will change under the action of light of a certain wavelength and intensity, resulting in its peak absorption of light. That is, a corresponding change in color is effected. This color change is generally reversible. [0003] At present, photochromic materials that meet the absorption band in the visible region, can achieve fast photoresponse speed, high sensitivity, and have practical application value are very limited, especially in both solution and solid state. There are very few materials with reversible discoloration phenomenon, which cannot meet the needs of the market. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): C09K9/02
CPCC09K9/02C09K2211/1029C09K2211/1007
Inventor 倪新龙聂海根宋建新
Owner HUNAN NORMAL UNIVERSITY
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