In:
Chemical Science, Royal Society of Chemistry (RSC), Vol. 13, No. 35 ( 2022), p. 10574-10580
Abstract:
We report a family of organometallic rare-earth complexes with the general formula (COT)M(Cp ttt ) (where (COT) 2− = cyclooctatetraenide, (Cp ttt ) − = 1,2,4-tri( tert -butyl)cyclopentadienide, M = Y( iii ), Nd( iii ), Dy( iii ) and Er( iii )). Similarly to the prototypical Er( iii ) analog featuring pentamethylcyclopentadienyl ligand (Cp*) − , (COT)Er(Cp ttt ) behaves as a single-ion magnet. However, the introduction of the sterically demanding (Cp ttt ) − imposes geometric constraints that lead to a simplified magnetic relaxation behavior compared to the (Cp*) − containing complexes. Consequently, (COT)Er(Cp ttt ) can be viewed as a model representative of this organometallic single-ion magnet architecture. In addition, we demonstrate that the increased steric profile associated with the (Cp ttt ) − ligand permits preparation, structural characterization and interrogation of magnetic properties of the early-lanthanide complex, (COT)Nd(Cp ttt ). Such a mononuclear derivative could not be obtained when a (Cp*) − ligand was employed, a testament to larger ionic radius of this early lanthanide ion.
Type of Medium:
Online Resource
ISSN:
2041-6520
,
2041-6539
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2559110-1
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