Title of Paper:Low-Coordinate Single-Ion Magnets by Intercalation of Lanthanides into a Phenol Matrix.

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Date of Publication:2018-01-01

Journal:Angewandte Chemie (International ed. in English)

Included Journals:PubMed、SCIE、EI

Volume:57

Issue:17

Page Number:4673-4676

ISSN No.:1521-3773

Key Words:bulky ligands; lanthanide intercalation; magnetic anisotropy; single-ion magnets

Abstract:It is very challenging to synthesize stable trivalent rare-earth complexes in which the coordination number is lower than 3 for the high oxidation state, there is a large ion radius and nearly non-bonding character of trivalent lanthanide ions. The bulky phenol ligand ArOH (Ar=2,6-Dipp2 C6 H3 , Dipp=2,6-diisopropylphenyl) was utilized to construct low-coordinate lanthanide compound [(ArO)Ln(OAr')] (Ar'=6-Dipp-2-(2'-i Pr-6'-CHMe(CH2- )C6 H3 )C6 H3 O- ; Ln=Tb, Dy, Ho, Er, Tm). These complexes and the free ligand ArOH were isostructural. Magnetic measurements and theoretical studies demonstrated that both the oblate-type dysprosium and prolate-type erbium analogues exhibited single-ion magnet (SIM) behavior. The bulky phenol ligands provided strong uniaxial ligand field, making the dysprosium SIM possessing blocking barrier up to 961 K. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.