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Copper(II) meso-Tetraphenylporphyrin (CuTPP) serves as a versatile probe in various sensing applications due to its unique photophysical and electrochemical properties. It has been used as a key component in the development of electrochemical sensors, such as detecting hydroxylamine and chlorogenic acid with high sensitivity and fast response times. Additionally, CuTPP thin films have been employed in optical and electrochemical gas sensors for volatile organic compounds (VOCs), showing significant response to styrene and xylene at room temperature. Its strong absorption and emission characteristics also make it a promising candidate for optical sensors and imaging applications. Overall, CuTPP's ability to interact with specific analytes and its stability under various conditions highlight its potential as a valuable probe in both research and industrial settings.