Hydrogen Gas Sensor Based Upon Proton Acceptors Integrated in Copper-Tetra-2,3-Pyridinoporphyradine
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概要
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We have previously developed a novel H2 gas sensor based upon a high proton affinity of diketodipyridylpyrrolopyrrole. Protonation is found to bring about a remarkable reduction of the electrical resistivity and this effect has been applied to H2 gas sensors. In the present investigation, an attempt was made to integrate proton acceptors (i.e., pyridyl rings) into copperphthalocyanine in order to improve the sensor characteristics. The present sensor exhibits a remarkable change in electrical resistivity by three orders of magnitude even under 0.01% H2. Furthermore, the sensor is found to operate reversibly at room temperature and is scarcely influenced by ambient gases such as CH4, CO, CO2, NO, SO2, CH3OH, C2H5OH, and H2O moisture.
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