Homochiral coordination polymers with helixes and metal clusters based on lactate derivatives

Utilizing the lactic acid derivatives (R)-4-(1-carboxyethoxy)benzoic acid (denoted: (R)-H(2)CBA) and (S)-4-(1-carboxyethoxy)benzoic acid (denoted: (S)-H(2)CBA)as chiral linkers to self-assemble with 4, 4'-bipyridine (denoted: BIP) and Cd(II) ions, a couple of three-dimensional homochiral coordination polymers, namely [Cd-3((R)-CBA)(3) (BIP)(2)(H2O)]center dot xGuest (1-D) and [Cd-3((S)-CBA)(3)(BIP)2(H2O)]center dot xGuest (1-L), have been synthesized under solvothermal reaction condition. Single crystal X-ray diffraction analysis reveals the two complexes contain single helical chains based on enantiopure ligands and cadmium clusters. Moreover, some physical characteristics such as PXRD, thermal stability, solid-state circular dichroism (CD) and luminescent were also investigated.