Abstract
Two coordination polymers (CPs) [Zn(PTA)(DTP)(H2O)2]•(DMF) (CP-1) and [Zn(BTC)(DTP)]•(CH3CN)1.5•(H2O)4 (CP-2) with one- and two-dimensional architectures were synthesized from Zn(II) ion and different organic linkers like terephthalic acid (H2PTA), benzene-1,3,5-tricarboxylic acid (H3BTC), and 3,5-di(1,2,4-triazol-1-yl) pyridine (DTP). The fluorescent sensing experiments showed that the two CPs displayed effective, sensitive, and selective abilities towards Fe3+ and Cr2O72-. For sensing the pesticides, CP-1 outperforms in sensing of metamitron (MMT) and CP-2 is ultrasensitive towards imidacloprid (IMI). The possible mechanisms involved in the quenching of the fluorescence intensity include the inner filter effect (IFE) and the fluorescence resonance energy transfer (FRET) effect.
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