Optochemical HCl gas detection using alkoxy substituted tetraphenylporphyrin-polymer composite films - Effects of alkoxy chain length on sensing characteristics

Authors
Nakagawa, K Sadaoka, Y Supriyatno, H Kubo, A Tsutsumi, C Tabuchi, K
Citation
K. Nakagawa et al., Optochemical HCl gas detection using alkoxy substituted tetraphenylporphyrin-polymer composite films - Effects of alkoxy chain length on sensing characteristics, SENS ACTU-B, 76(1-3), 2001, pp. 42-46
Citations number
5
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
SENSORS AND ACTUATORS B-CHEMICAL
ISSN journal
09254005 → ACNP
Volume
76
Issue
1-3
Year of publication
2001
Pages
42 - 46
Database
ISI
SICI code
0925-4005(20010601)76:1-3<42:OHGDUA>2.0.ZU;2-T
Abstract
Composite films of 5,10,15,20-tetra(4'-alkoxyphenyl)porphyrin (TP(OR)PH2) e mbedded in various polymer matrices were prepared and their optical respons es to HCl gas were examined. The absorbance of the Soret and Q-bands for fo e-base TP(OR)PH2 is reversibly sensitive to sub-ppm levels of HCl. The glas s transition temperature (T-g) of a matrix below the sensing temperature is more effective to the response and recovery behavior than above the sensin g temperature. High sensitivity to sub-ppm levels of HCl was achieved by us ing a TP(OC4H9)PH2-BuMA composite film. (C) 2001 Elsevier Science B.V. All rights reserved.