Key laboratory of material and technology for clean energy, Ministry of education, Institute of Applied Chemistry, Xinjiang University, Urumqi, 830046, Xinjiang, PR China.
Photochem Photobiol Sci. 2011 Oct;10(10):1562-7. doi: 10.1039/c1pp05110e. Epub 2011 Jul 11.
A novel photochromic compound, 1,3-diphenyl-4-(3-chloro-4-fluorobenzal)-5-hydoxypyrazole 4-phenylsemicarbazide (1a), has been synthesized by introducing a phenylsemicarbazide unit. The material exhibits good fatigue resistance and reversible fluorescent switching properties with distinct fluorescence on/off ratio under alternating UV irradiation and heating at 120 °C. For the fabrication of actual application materials, 1a/hydroxypropylmethylcellulose (HPMC) composite film has been successfully fabricated using hydrogel casting method. The 1a/HPMC composite film obtained can also show reversible photochromic reaction under UV irradiation and rapid thermal bleaching properties by heating. The HPMC composite film shows similar good photochromic properties as those of 1 in the crystalline state.
一种新型光致变色化合物 1,3-二苯基-4-(3-氯-4-氟苯亚甲基)-5-羟基吡唑 4-苯腙（1a），通过引入苯腙单元而合成。该材料具有良好的抗疲劳性能和可逆荧光开关性能，在交替紫外光照射和 120°C 加热下，具有明显的荧光开/关比值。为了制备实际应用材料，采用水凝胶浇铸法成功制备了 1a/羟丙基甲基纤维素（HPMC）复合膜。所得到的 1a/HPMC 复合膜在紫外光照射下也可以表现出可逆的光致变色反应和通过加热快速热褪色性能。HPMC 复合膜在结晶状态下表现出与 1 相似的良好光致变色性能。
