Self-assembly of two chiral zinc coordination polymers based on N-benzoyl-l-glutamic acid: Influence of different N-donor ancillary ligands on structural arrangement and photoluminescent properties

Abstract The room-temperature reactions between N -benzoyl- l -glutamic acid (H 2 bzgluO), zinc salts and ex-bidentate N-donor ligands in acidic CH 3 OH/H 2 O solutions yielded two new coordination polymers, [Zn(bzgluO)(bpp)] n ·1.75 n H 2 O (bpp = 1,3-bis(4-pyridyl)propane) ( 1 ) and [Zn(bzgluO)(4,4-bipy) 0.5 ] n (4,4-bipy = 4,4-bipyridine) ( 2 ). The two complexes have been characterized using single-crystal X-ray diffraction, infrared spectra, elemental analysis, thermogravimetric analysis and powder X-ray diffraction analysis. The X-ray structural determination indicates that complex 1 crystallizes in the monoclinic space group C 2 and displays a 2-D wave-like sheet structure, while complex 2 crystallizes in the tetragonal space group P 4(3)2(1)2 and presents a 3-D network structure. The structural difference indicates that the effect of N-donor ancillary ligand is critical in construction of polymeric arrangement. Moreover, the solid-state photoluminescent properties of the two coordination polymers change also according to the N-donor ancillary ligand introduced.