Abstract
The two-dimensional porphyrin sheet (2D porphyrin) was as an electric and optical sensor material for pH detection was explored via the periodic density functional theory. The geometric structures, electronic and optical properties of the 2D porphyrin with different amount of protons were calculated in order to explore the mechanism of sensor for pH detection. The band structure and absorption spectra of the 2D porphyrin were dependent on the amount of proton applied. Thus, the conductivity and absorption spectra of 2D porphyrin were all sensitive to solution pH, which can be applied to the electric and optical sensor for pH detection. This concept had potential applications in the design of sensor devices based on the 2D porphyrin.
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