Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 65, Issue 1-3, Pages 138-140Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0925-4005(99)00469-4
Keywords
gas sensor; optochemical sensor; UV-Vis spectrum; porphyrin; hydrogen chloride; environmental monitoring
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Composite films of tetraphenylporphyrin embedded in various of polymer matrix were prepared and their optical responses to hydrogen chloride (HCl) gas were examined. The absorbance of the Soret- and Q-bands for free-base tetratphenylporphyrin is reversibly sensitive to parts per million (ppm) levels of HCl. The lower T-g of polymer matrix than the sensing temperature is effective to enhance the sensitivity of the Soret- and Q-band region. (C) 2000 Elsevier Science S.A. All rights reserved.
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