Synthesis and crystal structures of three novel coordination polymers generated from AgCN and AgSCN with flexible N-donor ligands

The solvothermal reactions of AgX (X = CN, SCN) with mbix [mbix = 1,3-bis(imidazole-l-yl-methyl)benzene] or bix [bix = 1,4-bis(imidazole-l-yl-methyl)benzene] afforded the polymers [AgCN(mbix)]n (1), [(AgCN)4(bix)2]n (2) and [(AgSCN)2(mbix)]n (3). They were all characterized by infrared spectroscopy, elemental analysis and X-ray single-crystal analysis. The structure of 1 contains a 3-fold-interpenetrated 2D network, while that of 2 exhibits 2-fold parallel interpenetration. There is no interpenetration observed in 3. Compounds 2 and 3 show 3D supramolecular structures built from 2D networks through weak π ⋯ π interactions. The photoluminescent properties of the present compounds were also investigated.

Graphical abstractThe solvothermal reactions of AgX (X = CN, SCN) with mbix [mbix = 1,3-bis(imidazole-l-yl-methyl)benzene] or bix [bix = 1,4-bis(imidazole-l-yl-methyl)benzene] afforded [AgCN(mbix)]n (1), [(AgCN)4(bix)2]n (2) and [(AgSCN)2(mbix)]n (3). The structure of 1 contains 3-fold-interpenetrated 2D networks, while that of 2 exhibits 2-fold parallel interpenetration. There is no interpenetration observed in 3. These three polymers all contain π ⋯ π interactions.Figure optionsDownload full-size imageDownload as PowerPoint slide