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Synthesis, Crystal Structures and Photophysical Properties of Novel Tetranuclear Cadmium( II ) Schiff‐Base Complexes
Author(s) -
Lo WingKit,
Wong WaiKwok,
Wong WaiYeung,
Guo Jianping
Publication year - 2005
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200500362
Subject(s) - chemistry , schiff base , cadmium , ligand (biochemistry) , crystal structure , phosphorescence , crystallography , single crystal , stereochemistry , polymer chemistry , organic chemistry , fluorescence , biochemistry , physics , receptor , quantum mechanics
The synthesis and structural characterisation of some new tetranuclear cadmium( II ) Schiff‐base complexes were described. Reaction of the hexadentate Schiff‐base ligands (H 2 L) with an excess of cadmium( II ) acetate, Cd(OAc) 2 , furnished novel tetracadmium complexes of the general formula [Cd 4 (L) 2 (OAc) 4 ], which exhibit an interesting three‐dimensional cage‐like structure of four ligand‐supported cadmium atoms. All of the complexes were fully characterised by spectroscopic (FTIR, NMR and FAB MS) methods and their molecular structures were confirmed by single‐crystal X‐ray analysis. The X‐ray crystal structures of these tetranuclear Schiff‐base complexes represent the first structurally characterised examples of this kind for the cadmium triad. These new complexes were found to display rich photophysical properties and they all exhibited low‐temperature phosphorescence in the frozen state. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)