A new three-dimensional bis(benzimidazole)-based cadmium(II) coordination polymer

Abstract A new coordination polymer (CP), formulated as [Cd(L)(DCTP)] n ( 1 ) (L = 1,1′-(1,4-butanediyl)bis(2-methylbenzimidazole), H 2 DCTP = 2,5-dichloroterephthalic acid), was synthesized under hydrothermal conditions and the performance as luminescent probe was also investigated. Single-crystal X-ray diffraction reveals CP 1 is a 3D 3-fold interpenetrated dia network with large well-defined pores. It is found that CP 1 revealed highly sensitive luminescence sensing for Fe 3 + ions in acetonitrile solution with a high quenching efficiency of K SV  = 2541.238 L·mol − 1 and a low detection limit of 3.2 μM (S/N = 3). Moreover, the photocatalytic efficiency of 1 for degradation of methylene blue could reach 82.8% after 135 min. Therefore, this coordination polymer could be viewed as multifunctional material for selectively sensing Fe 3 + ions and effectively degrading dyes.