Solvothermal synthesis, structure, and fluorescence properties of three d10 polymers assembled from semi-rigid V-shaped aza-bridged multicarboxylate. Issue 38 (30th March 2015)

• Record Type: Journal Article
• Authors: Tan, Yu-Hui; Xiong, Jian-Bo; Gao, Ji-Xing; Xu, Qing; Fu, Chao-Wu; Tang, Yun-Zhi; Yang, Shao-Ping; Wen, He-Rui; Shu, Qing
• Is Part Of: RSC advances. Volume 5:Issue 38(2015)
• Page Start: 30216
• Page End: 30221
• Publication Date: 2015-03-30
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra02417j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Hydrothermal reactions of azanediyldibenzoic acid and M(OH)2 with different ancillary ligands afford three polymers. These polymers show great different structures and properties originated from the variation of second ligands and coordination modes. Abstract : Hydro(solvo)thermal reactions between a new flexible multicarboxylate ligand, 2, 2′-azanediyldibenzoic acid (H2 L), and M(OH)2 (M = Cd, Zn) in the presence of different N-donor ancillary ligands, 4, 4′-bipyridine (bpy) and pyridine (py), afford three novel coordination polymers: [Cd2 (L)2 (bpy)1.5 (H2 O)] n (1 ), [Cd2 (L)(Py)2 ] n (2 ), and [Zn2 (L)2 ] n (3 ). These polymers show great differences in regard to their structures and properties due to the variation in the ancillary ligands and in the coordination geometry of the metal ions. Compound1 exhibits a 3D supramolecular network assembled from 2D layered architecture composed of dinucelar cadmium subunits via intermolecular π⋯π and C–H⋯π interactions. The supramolecular structure of compound2 is built from the packing of two homochiral helical chain. Compound3 possesses two crystallographically nonequivalent metal atoms with Zn1 in a four-coordinated tetrahedron geometry and Zn2 in a five-coordinated trigonal bipyramid geometry. Five different coordination modes, ranging from μ2, μ3 and μ4, have been observed in the H2 L ligands. The solid-state fluorescence spectra show that complexes1 and2 exhibit small shifts to the blue, while3 is red shifted with respect to the free ligand.