Zinc(II) 2D Coordination Polymer With Terephthalate and 4,6‐Bis(Imidazol‐1‐yl)‐2,1,3‐Benzoxadiazole Linkers as a Selective Luminescent Probe for Gallium(III) Cations
Vladislava V. Matveevskaya, Dmitry I. Pavlov, Alexey A. Ryadun, E. Kh. Sadykov, Tatiana Y. Guselnikova, Vladimir P. Fedin, Xiaolin Yu, Аndrei S. Potapov
Abstract
ABSTRACT A two‐dimensional (2D) zinc(II) coordination polymer CP‐1 , [Zn(im 2 bod)(bdc)] n (im 2 bod = 4,6‐bis(imidazol‐1‐yl)‐2,1,3‐benzoxadiazole, bdc 2− = 1,4‐benzenedicarboxylate), was synthesized and fully characterized. CP‐1 crystallizes in the monoclinic crystal system, space group P 2 1 /n. Zn 2+ ions adopt a four‐coordinated distorted tetrahedral geometry. The structure of CP‐1 comprises a two‐dimensional layer consisting Zn 2+ cations connected by im 2 bod and bdc 2− ligands. The adjutant layers participate in π‐π stacking interactions via the benzene and 2,1,3‐benzoxadiazole rings. CP‐1 demonstrated a blue emission with the maximum at 490 nm and a photoluminescence quantum yield 24%. Luminescent sensing properties of CP‐1 in aqueous suspension toward metal cations were evaluated, and selective emission quenching response was observed toward Ga 3+ cations with the limit of detection 10 μM.