Synthesis, crystal structures, and luminescence sensing properties of two cobalt(II) complexes containing bis(thiabendazole) moieties

Abstract

Two new Co(II) complexes, namely [Co2(L1)(TBIP)·H2O]n(1) and [Co2(L2)(NPTA) H2O]n (2) (L1\u2009=\u20091,4-bis(thiabendazole-1-ylmethyl)benzene, L2\u2009=\u20091,2-bis(thiabendazole-1-ylmethyl)benzene, H2TBIP\u2009=\u20095-tert-butylisophthalic acid, and H2NPTA\u2009=\u20092-nitroterephthalic acid), were hydrothermally synthesized and characterized. 1 shows a 1D double chain, while 2 displays a binuclear structure. 1 and 2 extend into a 2D supramolecular network via C−H···O and O−H···O hydrogen bonding interactions, respectively. 1 and 2 exhibit excellent chemical stability in a wide pH range of 3−12. Furthermore, 1 and 2 are promising di-functional sensors for the detection of Fe3+/Cr2O72− (pH\u2009=\u20094) and Ni2+/MnO4− (pH\u2009=\u20099), respectively, with high sensitivity and selectivity and a low limit of detection.