ChemComm
Communication
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(
given by polypyridyl complexes), thereby opening the way to the
20
design of light-responsive magnetic clusters.
This work was financially supported by CNRS, UPMC and
ANR (project SWITCH: 2010-BLAN-712). The authors thank
Dr B. Mal ´e zieux for fruitful discussions.
Notes and references
1
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0
Fig. 3 Temperature dependence of the in-phase (w ; top) and the out-of-phase
00
(
w ; bottom) ac susceptibility for 4 under a 1600 Oe field.
For molybdenum compounds, we used the micro-SQUID
1
1
1 J. Long, L.-M. Chamoreau, C. Mathoni `e re and V. Marvaud, Inorg.
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technique to measure magnetization hysteresis loops at different
temperatures (below 2 K) and field sweep rates. The corre-
sponding magnetization versus applied field curve, presented in
Fig. S6 (ESI†), confirmed the SMM behaviour, despite the small
anisotropy barrier.
In summary, we have demonstrated herein that not only
hetero-tetra-metallic compounds can be obtained by taking
advantage of the flexibility of cyanide-based co-ordination chemistry,
(
c) H.-Z. Kou, B. C. Zhou, S. Gao and R.-J. Wang, Angew. Chem., Int.
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1
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defined class of supramolecular co-ordination compounds. Of parti-
cular interest are their unique elemental diversity and their versatility
1996, 35, 2400.
1
6 Caution: Although no problem was encountered in this work, perchlorate
salts are potentially explosive and cyanides are toxic. These starting
materials should be handled in small quantities and with care.
(
represented by Ln, M1, M2 and M3) that also includes the variability
1
1
7 R. Sessoli and A. K. Powell, Coord. Chem. Rev., 2009, 253, 2328.
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related to the choice of organic binucleating ligands and the
presence of singly ligated (end-on) cyanides as potential further
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E. Amouyal, New J. Chem., 1995, 19, 773.
systems in the field of molecular magnetism (single-molecule
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2
0 (a) T. Shiga, H. Miyasaka, M. Yamashita, M. Morimoto and M. Irie,
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478 Chem. Commun., 2013, 49, 9476--9478
This journal is c The Royal Society of Chemistry 2013