A long wavelength emission fluorescent and colorimetric chemosensor with high selectivity for H2PO-4 ions was designed and synthesized according to the twisted intramolecular charge transfer(TICT) mechanism. The senso...
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A long wavelength emission fluorescent and colorimetric chemosensor with high selectivity for H2PO-4 ions was designed and synthesized according to the twisted intramolecular charge transfer(TICT) mechanism. The sensor was bearing a 2-pyridine-1H-imidazo[4,5-b]phenazine and Cd2+ metal complex, which showed brilliant fluorescent and colorimetric response for H-2PO4 anions in aqueous solution. The detection limit of the sensor towards H2PO-4 is 2.8×10-6 M, and other anions, including F-, Cl-, Br-, I-, Ac O-, HSO--4, ClO 4 and CN- had nearly no influence on the probing behavior. The test strips based on 2-pyridine-1H-imidazo[4,5-b]phenazine and Cd2+ metal complex(S2-Cd) were fabricated, which could act as a convenient and efficient H2PO-4 test kits.
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