Synthesis, crystal structures and photophysical properties of novel tetranuclear cadmium(II) Schiff-base complexes

Wing Kit Lo; Rick W K WONG; Wai Yeung WONG; Jianping Guo

doi:10.1002/ejic.200500362

Synthesis, crystal structures and photophysical properties of novel tetranuclear cadmium(II) Schiff-base complexes

Wing Kit Lo, Rick W K WONG^*, Wai Yeung WONG, Jianping Guo

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › peer-review

45 Citations (Scopus)

Abstract

The synthesis and structural characterisation of some new tetranuclear cadmium(II) Schiff-base complexes were described. Reaction of the hexadentate Schiff-base ligands (H₂L) with an excess of cadmium(II) acetate, Cd(OAc)₂, furnished novel tetracadmium complexes of the general formula [Cd₄(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.

Original language	English
Pages (from-to)	3950-3954
Number of pages	5
Journal	European Journal of Inorganic Chemistry
Issue number	19
DOIs	https://doi.org/10.1002/ejic.200500362
Publication status	Published - 7 Oct 2005

Scopus Subject Areas

Inorganic Chemistry

User-Defined Keywords

Cadmium
Crystal structures
Phosphorescence
Schiff bases

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10.1002/ejic.200500362

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title = "Synthesis, crystal structures and photophysical properties of novel tetranuclear cadmium(II) Schiff-base complexes",

abstract = "The synthesis and structural characterisation of some new tetranuclear cadmium(II) Schiff-base complexes were described. Reaction of the hexadentate Schiff-base ligands (H2L) with an excess of cadmium(II) acetate, Cd(OAc)2, furnished novel tetracadmium complexes of the general formula [Cd4(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.",

keywords = "Cadmium, Crystal structures, Phosphorescence, Schiff bases",

author = "Lo, {Wing Kit} and WONG, {Rick W K} and WONG, {Wai Yeung} and Jianping Guo",

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T1 - Synthesis, crystal structures and photophysical properties of novel tetranuclear cadmium(II) Schiff-base complexes

AU - Lo, Wing Kit

AU - WONG, Rick W K

AU - WONG, Wai Yeung

AU - Guo, Jianping

PY - 2005/10/7

Y1 - 2005/10/7

N2 - The synthesis and structural characterisation of some new tetranuclear cadmium(II) Schiff-base complexes were described. Reaction of the hexadentate Schiff-base ligands (H2L) with an excess of cadmium(II) acetate, Cd(OAc)2, furnished novel tetracadmium complexes of the general formula [Cd4(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.

AB - The synthesis and structural characterisation of some new tetranuclear cadmium(II) Schiff-base complexes were described. Reaction of the hexadentate Schiff-base ligands (H2L) with an excess of cadmium(II) acetate, Cd(OAc)2, furnished novel tetracadmium complexes of the general formula [Cd4(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.

KW - Cadmium

KW - Crystal structures

KW - Phosphorescence

KW - Schiff bases

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DO - 10.1002/ejic.200500362

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JO - European Journal of Inorganic Chemistry

JF - European Journal of Inorganic Chemistry

IS - 19

ER -

Synthesis, crystal structures and photophysical properties of novel tetranuclear cadmium(II) Schiff-base complexes

Abstract

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