Optochemical HCl gas sensor using substituted tetraphenylporphine-ethylcellulose composite films

被引：25

作者：

Nakagawa, K

Tanaka, K

Kitagawa, T

Sadaoka, Y ^{[1
]}

机构：

[1] Ebara Res Co Ltd, Ctr Adv Technol, Fujisawa, Kanagawa 251, Japan

[2] Niihama Natl Coll Technol, Dept Ind Chem, Niihama 792, Japan

[3] Ehime Univ, Fac Engn, Dept Mat Sci & Engn, Matsuyama, Ehime 79077, Japan

来源：

JOURNAL OF MATERIALS CHEMISTRY | 1998年 / 8卷 / 05期

关键词：

D O I：

10.1039/a708482j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Composite films of various tetraphenylporphines embedded in ethylcellulose were prepared and their optical response to gaseous HCl was investigated. The absorbance of the Soret and V-bands for free-base tetraphenylporphines is reversibly sensitive to ppm levels of HCl. The replacement of the para hydrogen in one phenyl group with a hydroxy group is effective in enhancing the sensitivity of the Q-band region while prolonging response time. In addition, the temperature coefficient of the sensitivity of TP(OH)(R)(3)PH2 is lower than that of TPPH2. Under filtered light (> 600 nm) a significant deterioration of the sensitivity was not observed for more than 50 d.

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收藏

页码：1199 / 1204

页数：6

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