Synthesis structure and luminescence of a double helical coordination polymer with a semirigid ligand: L = N-(4-pyridylmethyl)benzimidazole

With the ligand: N-(4-pyridylmethyl)benzimidazole having some flexibility and spacial hindrance, one-dimensional double helix with the chirality, ([AgL] · NO3)∞ (1), which was synthesized by the diffusion reaction in a U-tube with H2O as diffusion mediate, is constructed by two single-helical chains with the same chirality through van der Waals forces. But the compound 1 is racemic.