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Affinity Control of Aminopropylsiloxane-based Organic/Inorganic Hybrids for Optical Sensors

Published online by Cambridge University Press:  01 February 2011

Shingo Katayama ,
Noriko Yamada  and
Masanobu Awano
Shingo Katayama
Affiliation:
Fine Ceramics Research Association, 2266–98 Shimoshidami, Moriyama, Nagoya 463–8560, JAPAN
Noriko Yamada
Affiliation:
Nippon Steel Corporation, Advanced Technology Research Laboratories, 20–1 Shintomi, Futtsu, Chiba 293–8511, JAPAN
Masanobu Awano
Affiliation:
Advanced Manufacturing Research Institute, AIST, 2266–98 Shimoshidai, Moriyama, Nagoya 463–8560, JAPAN
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Abstract

The aminopropylsiloxane-based organic/inorganic hybrid is known as a sensitive material toward NO2 gas for optical sensing systems but it has the irreversible detection. The affinity of the aminopropylsiloxane-based organic/inorganic hybrid toward NO2 gas was controlled by incorporating an Nb inorganic component derived from Nb(OC2H5)5 into the hybrid structure. The amino groups had a strong coordination bond with hydrolyzed Nb(OC2H5)5 and/or an acid-base pair with an oxoanion formed by hydrolysis of Nb(OC2H5)5. Thus, the strong solid-basicity of the aminopropylsiloxane-based organic/inorganic hybrid was weakened. The aminopropylsiloxane-based organic/inorganic hybrid containing an Nb inorganic component provided reversible sensing toward NO2 gas in an optical sensing system. NO2 is thought to be more weakly adsorbed because of the weakened basicity of the amino groups.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 847: Symposium EE – Organic/Inorganic Hybrid Materials , 2004 , EE10.6
Copyright
Copyright © Materials Research Society 2005

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