Syntheses, structures and catalytic properties of chiral Co(II) coordination polymers based on (R)-4-(4-(1-carboxyethoxy)phenoxy)benzoic acid

To investigate the construction of novel chiral coordination polymers and the effect of different substituents on the ligands, three complexes, namely [Co(L)(bimb)]·EtOH·H2O [bimb = 4,4′-bis((1H-imidazol-1-yl)methyl)-biphenyl, L = (R)-4-(4-(1-carboxyethoxy)phenoxy)-3-fluorobenzoic acid (1); L = (R)-4-(4-(1-carboxyethoxy)phenoxy)-3-chlorobenzoic acid (2); L = (R)-4-(4-(1-carboxyethoxy)phenoxy)-3-nitroaniline acid (3)], have been hydrothermally synthesized and characterized by IR, elemental analyses, thermogravimetric analysis, solid state circular dichroism (CD), powder and single-crystal X-ray diffractions. Structure analysis indicates that complexes 1–3 are isomorphic, featuring two-dimensional (2D) 2-fold interpenetrated sq1 structures. In addition, their second harmonic generation efficiency and catalytic activity for the aldol reaction were investigated.

A series of chiral coordination polymers exhibit second harmonic generation (SHG) efficiency and asymmetrical catalytic properties toward aldol reactions.Figure optionsDownload as PowerPoint slide