物理化学学报 >> 2000, Vol. 16 >> Issue (01): 5-8.doi: 10.3866/PKU.WHXB20000102

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钛凝胶的光致变色和电致变色特性

管自生, 马颖, 曹亚安, 纪学海, 姚建年   

  1. 中国科学院化学研究所分子科学中心，北京 100080
  • 收稿日期:1999-09-03 修回日期:1999-10-28 发布日期:2000-01-15
  • 通讯作者: 姚建年

Characterization of the Photochromic and Electrochromic Titania Gel

Guan Zi-Sheng, Ma Ying, Cao Ya-An, Ji Xue-Hai, Yao Jian-Nian   

  1. Center of molecular Science,Institute of chemistry,Chinese Academy of Sciences,Beijing 100080
  • Received:1999-09-03 Revised:1999-10-28 Published:2000-01-15
  • Contact: Yao Jian-Nian

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关键词: 钛凝胶, 光致变色, 电致变色, ESR

Abstract:

Titania gel is very sensitive to change of color to blue-purple by UV irradiation and to brown color under extra electric field polarzation. The UV absorption spectra of the photochromic (PC) and electrochromic(EC) titania gel are different to that of the nanocrystalline TiO_2 which changes to blue color by UV irradiation or under extra electric field polarization. The steady-state ESR measurements at room temperature indicate that ESR signals of Ti3+ appeared in PC and EC titania gel with the g values corresponding to 1.9505 and 1.9512, respectively.

Key words: Titania gel, Photochromism, Electrochromism, ESR