Synthesis, Crystal Structure, and Luminescence of Zn/Cd Coordination Polymers with a New Fuctionalized Terpyridyl Carboxylate Ligand

• Published in: Crystal growth & design Vol. 14; no. 4; pp. 1629 - 1641
• Main Authors: Xu, Bing, Xie, Juan, Hu, Huai-Ming, Yang, Xiao-Le, Dong, Fa-Xin, Yang, Meng-Lin, Xue, Gang-Lin
• Format: Journal Article
• Language: English
• Published: Washington,DC American Chemical Society 02.04.2014
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Growth from solutions; Materials science; Methods of crystal growth; physics of crystal growth; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Other materials; Physics; Specific materials; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; pH value; Molecular structure; Polychelate; Dicarboxylic acids; Organometallic compounds; Luminescence; Photoluminescence; XRD; Thermal stability; Thermal properties; Monocrystals; Lamellar structure; Benzene; Optical properties; Crystal growth from solutions; Ligands; Carboxylates; Bilayers; Organic compounds; Crystal structure
• ISSN: 1528-7483; 1528-7505
• DOI: 10.1021/cg4016977

Eight new coordination polymers, [Zn(L)Cl] n (1), [Zn2(L)4] n ·2nH2O (2), [Zn2(L)2(1,3-bdc)] n (3), [Zn2(L)(1,3-bdc)(OH)] n ·0.5nH2O (4), [Zn9(L)4(1,3-bdc)6(OH)2] n ·3nH2O (5), [Zn2(L)2(1,4-bdc)] n ·nH2O (6), [Cd2(L)4] n ·nH2O (7), and [Cd3(L)2(1,3-bdc)2] n ·nH2O (8) [HL = 4′-(2-carboxyphenyl)-4,2′:6′,4″-terpyridine, H2(1,3-bdc) = benzene-1,3-dicarboxylic acid, H2(1,4-bdc) = benzene-1,4-dicarboxylic acid] have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, and single crystal X-ray diffraction. Complexes 1, 2, and 7 display a two-dimensional (2D) layer structure. Complex 3 presents a complicated 2D layer structure with paddle-wheel units, which exhibits an interesting (3,4,6)-connected 3-nodal new topological net with the point symbol of (3·4·5·62·7)2(3·6·7)2(32·42·52·62·76·8). Complex 4 is a 2-nodal (3,5)-connected 2D bilayer structure with the gek1 topological net and the point symbol of (3·4·5)(32·4·5·62·74). Complex 5 shows a self-penetrating three-dimensional (3D) framework based on pentanuclear clusters, which features an intriguing (3,3,4,4,12)-connected 5-nodal new topological net with the point symbol of (4·62)2(42·64)4(43)2(48·634·822·102). Complex 6 features a 2-fold interpenetrating (3,4)-connected 3D framework with the ins topological net and the point symbol of (63)(65·8). Complex 8 is a new (4,4,5,6)-connected 3D network built up by a linear Cd3(COO)6 trinuclear cluster with the point symbol of (42·63·8)2(43·63)2(44·64·82)2(48·66·8). The diverse structures indicate that rational adjustment of the second ligand, the pH value, and counteranion are good methods to further design metal–organic compounds with new structures and properties. In addition, the thermal stabilities and photoluminescence properties of 1–8 were also studied.