Old ligands with new coordination chemistry: A Mn17Na cluster bearing triethanolamine and azide groups and exhibiting slow magnetization relaxation
Graphical abstract
A new Mn17Na cage-like cluster has been observed from the amalgamation of azide, carboxylate and triethanolamine ligands in Mn cluster chemistry. The complex exhibits frequency-dependent out-of-phase tails of signals, characteristics of the superparamagnetic-like slow relaxation of an SMM.
Section snippets
Acknowledgement
The authors thank the U.S. National Science Foundation (Grant CHE-0414555).
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2014, Coordination Chemistry ReviewsCitation Excerpt :The octahedral unit {MnII6MnIII11(μ4-O)8(μ1,1,1-N3)4}2+ occurs also in the 1D coordination polymer {[Mn17O8(N3)5(O2CMe)4(pd)10(py)6]}n [124], the polymerization being achieved by single 2.11 N3− groups. The reaction of Mn(ClO4)2·6H2O, NaO2CCMe3, H3tea, NEt3 and NaN3 (1:2:1:1:2) in MeCN/DMF gave a dark brown solution from which was subsequently isolated [NaMnII4MnIII12MnIVO10(OH)2(N3)3(O2CCMe3)13(tea)3(Htea)(DMF)] (43) in 45% yield [125,126]. The structure of 43 consists of a NaMn17 cage-like cluster with an irregular topology.