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Fig. 7 The photoluminescence spectrum of 4 in solid state
or phosphorescence at wavelengths < 450 nm are reported in
the literature.51 Thus complex 4 may be used as an advanced
material for a light emitting diode device owing to its strong
short-wavelength emission and reasonable thermal stability
(no weight loss occurred below 272 ꢂC according to TGA).
In conclusion, a series of N-carbazolylacetates with different
carboxylato coordination modes were synthesized and mag-
netic and/or PL properties have been studied. In this paper,
for the first time, a novel motif of a dinuclear tricarboxylato
copper(II) complex with one Z:Z:m2 bridge and two unusual
monoatomic bridges is reported. Complex 4 shows unusual
emissions in the solid state. The high UV intraligand emission
together with the visible emission arising from intermolecular
ligand–ligand interactions suggest a future in the design of
photoluminescent materials for light-emitter applications by
tailoring their structures.
25 G. M. Brown and R. Chidambaram, Acta Crystallogr., Sect. B,
1973, 29, 2393.
26 G. Wilkinson, The Synthesis, Reaction, Properties & Application
of Coordination Compounds, Comprehensive Coordination Chem-
istry, Pergamon Press, Oxford, 1987, vol. 5, p. 634.
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30 A. W. Addison, T. N. Rao, J. Reedijk, J. van Rijn and G. C.
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Acknowledgements
34 R. J. Doedens, Prog. Inorg. Chem., 1976, 21, 209.
35 B. Bleaney, K. Bowers, Proc. R. Soc, London, Ser. A., 1952, 451.
36 B. N. Figgis and R. L. Martin, J. Chem. Soc., 1956, 3837.
37 B. Bleaney and K. D. Bowers, Proc. R. Soc. London, Ser. A, 1952,
214, 451.
This work was supported by a grant for State Key Program of
China, the National Nature Science Foundation of China
(29871001; 20071001), and the Malaysian Government and
Universiti Sains Malaysia for research grant R&D No. 305/
PFIZIK/610961. One of the authors, Y. P. T., thanks the Min-
istry of Education of China, and L. K. T. thanks the Natural
Sciences and Engineering Research Council of Canada for
financial support.
38 Z. Xu, L. K. Thompson and D. O. Miller, Inorg. Chem., 1997, 36,
3985.
39 MAGMUN4.0 is available free of charge. It has been developed
by Dr Zhiqiang Xu (zxu@hpower.com) and Kathy Minzhen He
(heminzhen@yahoo.com) in collaboration with Prof. L. K.
Thompson (lthomp@mun.ca), and Dr O. Waldmann (wald-
mann@physik.uni-erlangen.de), who wrote the energy state rou-
tine (Ow01.exe). We do not distribute the source codes. The
programs may be used only for scientific purposes, and economic
utilization is not allowed. If either routine is used to obtain scien-
tific results, which are published, the origin of the programs
should be quoted.
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