A pair of 3D homochiral helical metal–organic frameworks with hetrometallic chains constructed by proline derivative ligands

A pair of homochiral metal–organic frameworks based on proline derivative ligands ((S)-H3PIA and (R)-H3PIA), namely [Cd3Na((S)-PIA)2(CH3CO2) (H2O)6]·2H2O (1-L) and [Cd3Na((R)-PIA)2(CH3CO2) (H2O)6]·2H2O (1-D), have been synthesized. Crystallographic analysis indicates complexes 1-L and 1-D contain interesting infinite hetrometallic and homochiral helical chains. Some physical characteristics, such as solid-state circular dichroism (CD), thermal stabilities and photoluminescent properties were also investigated. Our results highlight a feasible synthesis method to construct functional HMOFs from proline derivative ligands and heterometal ions.

Graphical AbstractA pair of 3D homochiral metal–organic frameworks (HMOFs) with infinite hetrometallic and homochiral helical chains have been constructed by proline derivative ligands ((S)-H3PIA and (S)-H3PIA), Na+ ions and Cd2+ ions.Figure optionsDownload full-size imageDownload as PowerPoint slide