Abstract
Two 2D coordination polymers (CPs), namely, {[Cu(bib)2]·2NO3·H2O}n (1) and {[Zn3(bib)2.5(C2O4)3(H2O)]·DMF·H2O}n (2) {bib = 1,4-bis (1-imidazoly) benzene} have been synthesized under solvothermal conditions. The structural analysis revealed that both 1 and 2 are 2D frameworks, which are further expanded into 3D supramolecular structures through CH⋯O hydrogen bonding. Luminescence properties reveal that 1/2 has highly sensitive and selective recognization for nitroaromatic compounds (NACs)/Fe3+ ions in aqueous solutions. Moreover, the luminescence quenching mechanisms were systematically revealed via photoinduced electron transfer (PET) process, resonance energy transfer (RET) and fluorescence lifetime.
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