An optochemical HCl gas sensor using 5,10,15,20-tetrakis (3′,5′-di-tert-butyl,4′-hydroxyphenyl) porphin-ethylcellulose composite films

被引：16

作者：

Nakagawa, K

Kitagawa, T

Sadaoka, Y ^{[1
]}

机构：

[1] Ehime Univ, Fac Engn, Dept Mat Sci & Engn, Matsuyama, Ehime 7908577, Japan

[2] Niihama Natl Coll Technol, Dept Ind Chem, Niihama 7920805, Japan

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1998年 / 52卷 / 1-2期

关键词：

gas sensor; optochemical sensor; absorbance; UV-vis spectrum; tetraphenylporphins; hydrogen chloride; environmental monitoring;

D O I：

10.1016/S0925-4005(98)00249-4

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The absorbance of the Soret and Q-bands of free-base tetraphenylporphins is reversibly sensitive to ppm levels of HCl. The replacement of the hydrogen para to the phenyl group with an -OH group enhances the sensitivity of the Soret and the Q-band region. While both response and recovery times of tetra 4'-OH substituted tetraphenylporphins is considerably longer than that of tetraphenylporphin, the replacing the hydrogen meta to the phenyl group with tert-butyI group is effective to improve both response and recovery times. The HCl gas sensor based on substituted-tetraphenylporphin with 4'-OH and 3',5'-di-C(CH3)(3) to the phenyl group shows superior performance for detection of emissions of ppm Levels of HCl gas. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：10 / 14

页数：5

共 13 条

[1] A SIMPLIFIED SYNTHESIS FOR MESO-TETRAPHENYLPORPHIN [J].