Mills Andrew, Hazafy David
WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, Thomas Graham Building, Glasgow, UK.
Analyst. 2008 Feb;133(2):213-8. doi: 10.1039/b713450a. Epub 2007 Nov 23.
A solvent-based, irreversible oxygen indicator ink is described, comprising semiconductor photocatalyst nanoparticles, a solvent-soluble redox dye, mild reducing agent and polymer. Based on such an ink, a film -- made of titanium dioxide, a blue, solvent-soluble, coloured ion-paired methylene blue dye, glycerol and the polymer zein -- loses its colour rapidly (<30 s) upon exposure to UVA light and remains colourless in an oxygen-free atmosphere, returning to its original blue colour upon exposure to air. In the latter step the rate of colour recovery is proportional to the level of ambient oxygen and the same film can be UV-activated repeatedly. The mechanism of this novel, UV-activated, solvent-based, colorimetric oxygen indicator is discussed, along with its possible applications.
描述了一种基于溶剂的不可逆氧指示剂墨水，其包含半导体光催化剂纳米颗粒、溶剂可溶性氧化还原染料、温和还原剂和聚合物。基于这种墨水，由二氧化钛、蓝色、溶剂可溶性、有色离子对亚甲基蓝染料、甘油和聚合物玉米醇溶蛋白制成的薄膜在暴露于紫外光下会迅速（<30秒）褪色，并且在无氧气氛中保持无色，暴露于空气中时会恢复其原始蓝色。在后者步骤中，颜色恢复速率与环境氧水平成正比，并且同一薄膜可以被紫外线反复激活。讨论了这种新型的、紫外线激活的、基于溶剂的比色氧指示剂的机制及其可能的应用。
