Iodoargentate photochromic material with quick response and multiple-color change
A technology for photochromic and color-changing materials, applied in the fields of color-changing fluorescent materials, organic chemistry, chemical instruments and methods, etc., can solve the problems of no activity performance, slow response rate, and low cycle times, and achieve extended application range and excellent color change. Features and preparation methods are simple and easy to implement
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[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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