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Title: Preparation of Silica-Gel Film with pH Indicators by the Sol-Gel Method
Authors: Kowada, Yoshiyuki
Ozeki, Toru
Minami, Tsutomu
Keywords: sol-gel method
optical pH sensors
organic-inorganic hybrid materials
Issue Date: Feb-2005
Publisher: Springer Netherlands
Abstract: Gel films with various pH indicators were prepared by the sol-gel method without catalysts. The obtained gel films showed good response for various pH solutions as optical pH sensors and no leaching of the indicators was observed. The feature of absorption spectra of the indicators in the gel films was almost the same as that in the aqueous solutions. pKa of the indicators in the gel films was shifted with the increase of the TMOS content in the starting solutions. These results suggest that the pH indicators in the gel films were trapped in similar environment as in the solutions.
URI: http://hdl.handle.net/10132/3420
Appears in Collections:a.1.2 学術雑誌掲載論文(著者版)

Please use this identifier to cite or link to this item: http://hdl.handle.net/10132/3420

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