期刊
INORGANIC CHEMISTRY
卷 50, 期 18, 页码 8694-8696出版社
AMER CHEMICAL SOC
DOI: 10.1021/ic201437u
关键词
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资金
- MICINN (Spain) [CTQ2010-15364, MAT2010-19681, DPI2010-21103-C04-03, CSD2007-00010, CSD2006-00015]
- Generalitat Valenciana (Spain) [PROMETEO/2009/108]
- ACIISI-Gobiemo Autonomo de Canarias (Spain) [PIL-2070901]
- MFR
- CNRS (France)
- ESRF, Grenoble, France [HS3902]
- Generalitat Valenciana
- Juan de la Cierva (MICINN)
- NANOMAC
Two new heterobimetallic manganese(II) copper(II) coordination polymers of formulas [Mn2Cu2-(Me(3)mpba)(2)(H2O)(6)]center dot 8H(2)O (1) and [Mn2Cu2(Me(4)ppba)(2)(H2O)(6)] center dot 8H(2)O (2) [Me(3)mpba = 2,4,6-trimethyl-N, N'-1,3-phenylenebis(oxamate) and Me(4)ppba = 2,3,5,6-tet-ramethyl-N,N'-1,4-phenylenebis(oxamate)] have been synthesized following a molecular-programmed self-assembly method from the corresponding dicopper(II) complexes acting as metalloligands toward Mn-II ions. 1 and 2 consist of neutral Mn-2(II) Cu-2II layers with a brick-wall structure made up of oxamato-bridged (MnCuII)-Cu-II chains connected through double meta-(1) and para-substituted (2) permethylated phenylene spacers. Overall magnetic (1) and nonmagnetic (2) layer ground states result from the ferro- and antiferromagnetic interchain interactions between the oxamato-bridged Mn-II Cu-II ferrimagnetic chains across m-and p-phenylene spacers, respectively. Interestingly, compound 1 exhibits a long-range ferromagnetic ordering with a rather high Curie temperature (T-C) of 20.0 K.
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