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一种新的光致变色膜:Na₂WO₄-PAA-Glycerol体系研究

A New Photochromic Film:Na₂WO₄-PAA-Glycerol System

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【Author】 SHANG Tong-Ming1,2 HE Jing-Hui1 HAN Min1 SHI Nai-En1 XU Zheng1(1State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Nanjing University, Nanjing 210093)(2Jiangsu Province Key Construction Laboratory of Precious Metals Processing Technology and Application, Jiangsu Teachers′ University of Technology, Changzhou, Jiangsu 213001)

【机构】南京大学配位化学国家重点实验室；南京大学配位化学国家重点实验室南京210093江苏技术师范学院贵金属深加工及应用江苏省重点建设实验室；常州213001；南京210093；

【Abstract】 A method for preparing Na2WO4-PAA-Glycerol photochromic films was reported. The film was composed of Na2WO4, PAA and Glycerol, which were coated on a glass substrate. The film turned blue in the sun, and bleached to transparent in the darkness. The UV-Visible spectra showed strong absorbance at 300~500 nm, and the ABS changed signifanctly at 500~800 nm. The film showed the best photochromic behavior when Nna2wo4is 4%~5%. The mechanism was suggested that after irradiation, poly tunstate produced by Na2WO4 and PAA formed the tungsten blues. The tungsten blues were bleached due to oxidation back to poly tunstate by oxygen. The film showed not only an excellent photochromism property with rapid response and good reversibility, but also the simple techniques and good stability.更多还原