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Theoretically predicted and experimentally observed relaxation pathways of two heterodinuclear 3d-4f complexes

The dinucleating ligand (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrayl)-tetrakis-(methylene)-tetrakis(2-methoxy-4-methylphenol), H4L, is well preorganized with an N4O2 octahedral site for a divalent transition metal ion and an O4 site (phenolates and methoxo donors, completed by added pivalates an...

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Bibliographic Details
Main Authors: Bender, Markus (Author) , Comba, Peter (Author) , Demeshko, Serhiy (Author) , Großhauser, Michael (Author) , Müller, Dennis (Author) , Wadepohl, Hubert (Author)
Format: Article (Journal)
Language:English
Published: September 21, 2015
In: Zeitschrift für anorganische und allgemeine Chemie
Year: 2015, Volume: 641, Issue: 12/13, Pages: 2291-2299
ISSN:1521-3749
DOI:10.1002/zaac.201500595
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/zaac.201500595
Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/zaac.201500595
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Author Notes:Markus Bender, Peter Comba, Serhiy Demeshko, Michael Großhauser, Dennis Müller, and Hubert Wadepohl
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Summary:The dinucleating ligand (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrayl)-tetrakis-(methylene)-tetrakis(2-methoxy-4-methylphenol), H4L, is well preorganized with an N4O2 octahedral site for a divalent transition metal ion and an O4 site (phenolates and methoxo donors, completed by added pivalates and solvent molecules) for lanthanide ions. Two 3d-4f complexes ([DyIIINiII(μ-H2L)piv2(OH2)]ClO4 and [DyIIICoII(μ-H2L)piv2(OH2)]ClO4) were prepared and fully characterized by X-ray molecular structures and electronic properties determined by ac and dc SQUID magnetometry. While the NiII based complex shows single-molecule magnetism (SMM), the CoII complex does not. With an extensive quantum-chemical analysis, this is shown to be due to a misalignment of the single ion anisotropies in the latter complex, and reasons for this are discussed.
Item Description:Gesehen am 20.05.2020
Physical Description:Online Resource
ISSN:1521-3749
DOI:10.1002/zaac.201500595

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