Porphyrinic Polymers for Gas Sensing: An Overview

Porphyrin is a kind of versatile chemically sensitive materials for application in chemical sensors. Recently, a variety of porphyrinic polymer membranes have been developed as gas sensors. Most of them are based on the photoluminescent or photoexcited state quenching of porphyrin dyes. Many porphyrinic gas sensors are composed of porphyrin or its derivatives immobilized on gas permeable polymer membranes. In this review, we present the state-of-art of various porphyrinic polymers for optical gas sensors, including those for oxygen (O2), hydrogen chloride (HCl), nitric oxide (NO) and carbon dioxide (CO2).