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A fast-response and multiple-color-changing iodosilvermate photochromic material

A technology of color-changing materials and silver salts, applied in the direction of color-changing fluorescent materials, organic chemistry, chemical instruments and methods, etc., can solve the problems of no active performance, less cycle times, single color of receptor type free radicals, etc., and achieve excellent color change The effect of characteristics, extended application range, and simple and easy preparation method

Active Publication Date: 2019-08-30
ZHENGZHOU RUIQIANG EXPERIMENTAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the commercial application of the current photochromic hybrid materials still faces many problems, mainly in the slow response rate (usually greater than 10 minutes), the number of cycles (usually less than 10 times), the relative color of acceptor types and free radicals. Single (primarily focused on viologen receptors)
Several bifunctional color-changing hybrid materials based on intermolecular electron transfer have been reported, all of which use 4,4′-bipyridine derivatives as strong electron acceptors. The types of donors (hard Lewis bases such as oxides and chlorides are the main ones), while soft Lewis bases (such as iodides) have no active performance due to the so-called heavy atom effect, which seriously restricts fast and multiple color light. Development of Chromogenic Materials

Method used

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  • A fast-response and multiple-color-changing iodosilvermate photochromic material
  • A fast-response and multiple-color-changing iodosilvermate photochromic material
  • A fast-response and multiple-color-changing iodosilvermate photochromic material

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preparation example Construction

[0037] Further, the preparation method of the methylated imidazopyridazine iodosilverate hybrid of the present invention comprises the following steps:

[0038] 1) imidazopyridazine, AgI, NaI.2H 2 O and 45% hydroiodic acid are stirred evenly in methanol or an organic solvent containing methanol according to 1:(2.5~9):(1~4):(1~3) molar ratio;

[0039] 2) Transfer the above mixed solution to a polytetrafluoroethylene-lined hydrothermal reaction kettle, and place it in an oven at 90-130°C to react for 1-3 days;

[0040] 3) After the reaction is finished, it is cooled to room temperature, a precipitate is generated, filtered, the filter cake is washed with acetonitrile, and dried to obtain a light yellow block crystal which is the methylated imidazopyridazine iodosilverate hybrid {[C 7 h 8 N 3 ] 2 [Ag 5 I 7 ]} n .

[0041] In step 1) of the present invention, methanol can provide the required methyl groups for the synthesis of methylated imidazopyridazine cations. Specifi...

Embodiment 1

[0047] AgI (235mg, 1.00mmol), imidazopyridazine (48mg, 0.4mmol), NaI.2H 2 O (186mg, 1.00mmol) and 45% hydriodic acid (0.1mL, 0.53mmol) were added to 5.00mL methanol, and after stirring for 15 minutes, a light yellow cloudy liquid was obtained, which was transferred to 15mL Teflon-lined water Heat the reaction kettle, place it in an oven at 110°C for 3 days, and cool slowly at room temperature to obtain light yellow blocky crystal 1, which is filtered, washed with acetonitrile, and dried. Yield: 48.9% (based on Ag).

Embodiment 2

[0049] AgI (620mg, 2.64mmol), imidazopyridazine (96mg, 0.66mmol), NaI.2H 2 O (491mg, 2.64mmol) and 45% hydriodic acid (0.37mL, 1.98mmol) were added to 8.00mL methanol solution, and after stirring for 15 minutes, a pale yellow turbid liquid was obtained, which was transferred to a 15mL polytetrafluoroethylene liner Put it in a hydrothermal reaction kettle, place it in an oven at 90°C for 3 days, and slowly cool it at room temperature to obtain a light yellow blocky crystal 1, which is filtered, washed with acetonitrile, and dried. Yield: 50.8% (based on Ag).

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Abstract

The invention relates to the field of synthesis of organic-inorganic hybridized color-change materials and particularly relates to a methylated imidazopyridazine iodoargentate photochromic material with quick response and multiple-color change on the basis of a dual mechanism, i.e., intermolecular electron transfer and photodecomposition of an inorganic constituent, i.e., iodoargentates, a preparation method for the photochromic material and an application of the photochromic material. A methylated imidazopyridazine iodoargentate hybrid has a chemical formula of {[C7H8N3]2[Ag5I7]}n, wherein [C7H8N3]<+> is a methylated imidazopyridazine cation, and [Ag5I7]n<n-> is a 1D anion chain. According to the photochromic material, the methylated imidazopyridazine iodoargentate photochromic material with quick response and wide-range color change is provided through taking an electron-deficient methylated imidazopyridazine cation as an electron acceptor and taking an iodoargentate anion skeleton with excellent photosensitive characteristic as an electron donor, and these electron donor-acceptor hybrids with semiconductor characteristics are endowed with new functions, i.e., quick response andmultiple-color change.

Description

technical field [0001] The invention relates to the field of synthesis of organic-inorganic hybrid color-changing materials, specifically methylated imidazopyridazine silver iodide based on the dual mechanism of intermolecular electron transfer and photolysis of inorganic component iodosilverate with rapid response and multiple color changes Salt photochromic material and its preparation method and application. Background technique [0002] Organic-inorganic hybrid color-changing materials are a class of functional materials with broad application prospects and practical value. They have important practical or potential application values ​​in the fields of sensors, switches, decoration, energy conversion, and information storage. At present, the commercial application of the current photochromic hybrid materials still faces many problems, mainly in the slow response rate (usually greater than 10 minutes), the number of cycles (usually less than 10 times), the relative color...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D487/04C09K9/02C09K9/00
Inventor 郝朋飞付云龙
Owner ZHENGZHOU RUIQIANG EXPERIMENTAL EQUIP CO LTD
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