Synthesis, structural diversity and luminescent properties of cadmium(II) coordination assemblies with 2-(2-aminophenyl)-1H-benzimidazole and pseudohalide ions

A systematic investigation of Cd(II)-(apbim)-X systems (apbim=2-(2-aminophenyl)-1H-benzimidazole and X=N3-,SCN- and N(NC)2-) was conducted, and the following cadmium(II) coordination compounds [Cd(N3)2(apbim)]n
- nMeOH (1), [Cd(SCN)2(apbim)]n
- nMeOH (2), [Cd(dca)(apbim)2]n
- n(NO3) (3), [Cd(SCN)2(apbim)2] (4) and [Cd(dca)2(apbim)2]
- H2O (5) were successfully synthesized and characterized by single-crystal diffraction, X-ray powder diffraction (XRPD), differential scanning calorimetry (DSC) analysis and IR spectroscopy. The luminescent properties of 2-(2-aminophenyl)-1H-benzimidazole and cadmium(II) coordination compounds were studied in solution (4 and 5) and solid state (1-5). The studies revealed that the solid state architecture and solid state photoluminescent properties of the Cd(II)-apbim-X systems (X=N3, NCS- and dca-) are strongly influenced by intermolecular interactions.