期刊
DALTON TRANSACTIONS
卷 43, 期 6, 页码 2581-2587出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3dt52316k
关键词
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资金
- National Natural Science Foundation of China [20971029, 21271050]
- Guangxi Natural Science Foundation [2010GXNSFD013018, 2012GXNSFBA053018, 2010GXNSFF013001, CMEMR-2011-23]
A series of Ln(4) clusters, [Ln(4)L(2)(mu(3)-OH)(2)(mu(4)-NO3)(NO3)(4)(OCH3)(H2O)]center dot xMeCN center dot yMeOH (Ln = Gd (1), Tb (2), Dy (3), Ho (4), Er (5), Yb (6), L = 2-{[2-(2-hydroxy-ethoxy)-ethylimino]-methyl}-6-methoxyphenol), have been synthesized by the reaction of Ln(NO)(3) and a Schiff-base ligand formed in situ. The six complexes display similar structures, with an overall metal core comprising two edge-sharing triangular Ln(3) units linked by a mu(4)-NO3- bridge. The luminescence spectrum of complex 2 shows the characteristic emission of the TbIII ions. The magnetic susceptibility studies reveal that the Ln(III) ions are very weakly interacting in all six compounds. Frequency dependence of the ac-susceptibility was found for 3, suggesting a typical single-molecule magnet (SMM) behavior with an anisotropic barrier of 28 K.
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