Coordination polymers of CdII and PbII derived from bipyridine–glycoluril: influence of metal-ion size and counter-ions

Autor:	Datta Markad, Avinash S. Kumbhar, Sakharam B. Tayade, Debamitra Chakravarty, Andrea Erxleben
Rok vydání:	2019
Předmět:	Coordination polymer Hydrogen bond Ligand Glycoluril 02 engineering and technology Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Inorganic Chemistry Crystallography chemistry.chemical_compound Perchlorate Bipyridine Bipyramid chemistry Materials Chemistry Physical and Theoretical Chemistry 0210 nano-technology
Zdroj:	Acta Crystallographica Section C Structural Chemistry. 75:1084-1090
ISSN:	2053-2296
Popis:	Two new one-dimensional (1D) coordination polymers (CPs), namely catena-poly[[[aquacadmium(II)]-bis(μ-4b,5,7,7a-tetrahydro-4b,7a-epiminomethanoimino-6H-imidazo[4,5-f][1,10]phenanthroline-6,13-dione)] bis(perchlorate) dihydrate], {[Cd(C14H10N6O2)2(H2O)](ClO4)2·2H2O} n or {[Cd(BPG)2(H2O)](ClO4)2·2H2O} n , 1, and catena-poly[[lead(II)-bis(μ-4b,5,7,7a-tetrahydro-4b,7a-epiminomethanoimino-6H-imidazo[4,5-f][1,10]phenanthroline-6,13-dione)] bis(perchlorate) dihydrate], {[Pb(C14H10N6O2)2](ClO4)2·2H2O} n or {[Pb(BPG)2](ClO4)2·2H2O} n , 2, have been synthesized using bipyridine–glycoluril (BPG; systematic name: 4b,5,7,7a-tetrahydro-4b,7a-epiminomethanoimino-6H-imidazo[4,5-f][1,10]phenanthroline-6,13-dione), a urea-fused tecton, in a mixed-solvent system. The CdII ion in 1 is heptacoordinated and the PbII ion in 2 is hexacoordinated, with the CdII ion adopting a pentagonal bipyramidal geometry and the PbII ion adopting a distorted octahedral geometry. Both CPs form infinite linear chain structures which are hydrogen bonded to each other leading to the formation of three-dimensional supramolecular network structures. Topological analysis of CPs 1 and 2 reveals that the structures exhibit 1D chain-like arrangements in an AB–AB sequence and shows platonic uniform 2-connected uninodal topologies. Furthermore, a comparative analysis of a series of structures based on the BPG ligand indicates that the size of the metal ion and the types of counter-ions used have a great influence on the resulting frameworks and properties.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a1d27e63a8d3a5aff4b4addda7a6687a https://doi.org/10.1107/s2053229619008325 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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