Assembly of Three Cadmium(II) Complexes Based on Flexible α,ѡ-Bis(benzimidazolyl)alkane Ligands

Abstract

Three flexible α, ω-bis(5,6-dimethylbenzimidazolyl)alkane ligands with different spacers were reacted with CdX 2 (X = Cl, Br, I) hydrothermally, resulting in three coordination archi-. They have been characterized by elemental analyses, IR spectra, thermogravimetric (TG) analysis, and single-crystal X-ray diffraction. Complex 1 displays a helical chain linked by the ligands L 1 , and a 2D supramolecular network is constructed through π−π stacking interactions; complex 2 shows a helical chain structure with connections through two kinds of strong π−π stacking interactions into an intricate 3D supramolecular network; complex 3 contains dinuclear metallomacrocycles. The fluorescence properties of 1-3 have been investigated in the solid state.