resumo
The solvothermal reactions of Cd(NO3)(2).6H(2)O with 2-hydroxyquinoline-4-carboxylic acid (H(2)hqc) and 4,4'-bipyridine (bpy) or trans-1,2-bi(4-pyridyl)ethylene (bpe) afforded two coordination polymers [Cd(H-hcic)(2)(bpy)(H2O)(2)](n) (1) and [Cd(H-hqc)(2)(bPe)(0.5)](n) (2), respectively. The bipyridine based auxiliary ligands such as bpy and bpe were selected in order to analyze the effect of the length of auxiliary ligands on the formation of coordination polymers. Compounds 1 and 2 were characterized by elemental analysis, IR, and single crystal X-ray diffraction. Compound 1 shows a one-dimensional (1D) chain structure with linear topology while compound 2 shows 2D network with 3,6-c binodal net, having point symbol {3(2).4}(3(4). 4(3).5(2).6(5).7} and vertex symbol [33.6(2)][3.3.3.3.6(2).6(2).6(2).6(2).6(2).*.*.*.*.*]. The results show that the spacer lengths of N-donor ligands do effect the topological structures of cadmium(II) coordination polymers. (C) 2013 Elsevier B.V. All rights reserved.
palavras-chave
BLUE FLUORESCENT EMISSION; CRYSTAL-STRUCTURE; FRAMEWORK SYNTHESIS; COMPLEXES; CADMIUM; NETWORK; PROPERTY; ZN(II); GEOMETRY
categoria
Chemistry
autores
Mal, D; Sen, R; Brandao, P; Shi, F; Ferreira, RAS; Lin, Z
nossos autores
Fa-Nian Shi
Investigador
Maria Rute de Amorim e Sá Ferreira André
Vice-Diretor
Paula Cristina Ferreira da Silva Brandão
Investigador
Rupam Sem
Bolseiro de investigação
Zhi Lin
Investigador PrincipalGrupos
1 - Nanomateriais inorgânicos funcionais e híbridos orgânico-inorgânico
5 - materiais biomédicos e biomiméticos
agradecimentos
The authors acknowledge the financial support from FCT, POCI2010, PTDC/EQU-EQU/100476/2008, FSE and FEDER. D.M. wishes to thank FT for post doctoral fellowship (SFRH/BPD/65056/2009).