resumo
A novel ID coordination polymer, [Cu(picOH)(2)(BPE)] (IIa), and neutral [Cu(picOH)(2)(BPE)(2)] (IIb) complexes, can be simultaneously isolated (structure H) when neutral [Cu(picOH)21 (1) species are axially bridged by 1,2-bis(4-pyridyl)ethane (BPE) molecules. The compound has been characterised structurally using single-crystal X-ray diffraction, elemental analysis, infrared and Raman spectroscopies and thermoanalytical measurements. In both structures the 3-hydroxypicolinate ligands are coordinated to the Cu2+ centres through their typical N,O-chelating coordination, with the increase of coordination number in II leading to a typical Jahn-Teller distorted octahedral coordination geometry. Although the structure of I has already been reported, we have re-determined its single-crystal structure at the low temperature of 180(2) K for comparative purposes. The magnetic properties of both compounds have also been investigated. (C) 2004 Elsevier B.V. All rights reserved.
palavras-chave
CADMIUM-ORGANIC FRAMEWORK; COORDINATION POLYMERS; SUPRAMOLECULAR ISOMERISM; HYDROTHERMAL SYNTHESIS; 3-DIMENSIONAL NETWORK; BUILDING-BLOCKS; TRIMESIC ACID; LIGANDS; 1,2-BIS(4-PYRIDYL)ETHANE; SOLIDS
categoria
Chemistry
autores
Girginova, PI; Paz, FAA; Nogueira, HIS; Silva, NJO; Amaral, VS; Klinowski, J; Trindade, T
nossos autores
Filipe Alexandre Almeida Paz
Investigador Principal
Helena Isabel Seguro Nogueira
Professor Auxiliar com Agregação
Nuno João Silva
Investigador Principal
Tito Trindade
Professor Catedrático