A multi-responsive luminescent sensor based on a Cd(II) coordination polymer with turn-on sensing toward Al3+ and Cr3+ as well as ratiometric response to norfloxacin

Abstract

Luminescent coordination polymers (CPs) can be as promising sensors in which an analyte-induced multi-responsive system with classy recyclability is conducive to the detection of plentiful deadly contaminants. A ternary Cd(II) CP, namely, [Cd(L)0.5(1,8-NDC)·H2O]n (1) (1,8-H2NDC = 1,8-naphthalenedicarboxylic acid) was constructed from the new flexibility 1,5-bis(thiabendazol-1-yl)pentane (L) and 1,8-H2NDC ligands under hydrothermal conditions. 1 possesses a 1D chain structure. 1 displays excellent pH resistance and luminescent sensing properties. 1 represents the first-ever CP for significant fluorescence “turn-on” detection of Al3+ and Cr3+ ions as well as ratiometric response to norfloxacin (NOR), even with the coexistence of other interferents. The luminescent sensing mechanism of 1 toward different analytes was discussed in detail.