Three New Coordination Polymers Based on One Reduced Symmetry Tripodal Linker

• Published in: Crystal growth & design 2011-07, Vol.11 (7), p.3115-3121
• Main Authors: Qin, Ling, Hu, Jin-Song, Li, Yi-Zhi, Zheng, He-Gen
• Format: Article
• Language: English
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Crystalline state (including molecular motions in solids); Exact sciences and technology; Growth from solutions; Materials science; Methods of crystal growth; physics of crystal growth; Organic compounds; Other materials; Physics; Specific materials; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Theory of crystal structure, crystal symmetry; calculations and modeling
• ISSN: 1528-7483; 1528-7505
• DOI: 10.1021/cg2003673

Three novel metal–organic frameworks, namely, {[(Zn4O)1/2(Zn3–OH)1/2L3/2O1/4(H2O)5/2(NO2)1/2]·(H2O)4} n (1), {[Cd3L2(H2O)4]·(H2O)9·DMA} n (2), and {[Co(HL)(4,4′-bibp)]} n (3; H3L = 5′-carboxyl-[1,1′:3′,1′′-terphenyl]-4,4′′-dicarboxylic acid, 4,4′-bibp = 4,4′-bisimidazolylbiphenyl, DMA = N,N-dimethylacetamide), have been synthesized under hydrothermal conditions. These compounds were characterized by elemental analysis, IR spectroscopy, and X-ray single-crystal diffraction. Compound 1 reveals an unusual 3D structure with {4·52}{4·62}{42·52·68·83}{52·6}{53·65·82} topology based on Zn4O and Zn3–OH clusters. In compound 2, the H3L ligand assembles with Cd(NO3)2 to a 3D framework with sqc 27 {4·62}2{42·610·83} topology. They are both three-dimensional frameworks containing one-dimensional channels. In compound 3, the HL2– anion and 4,4′-bibp both act as bidentate ligands and coordinate to Co cations to form a three-dimensional 4-connected uninodal network. In addition, the thermal stabilities for 1–3 and luminescent properties for 1 and 2 are also discussed in detail.