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Tetranuclear Dysprosium(III) Quintuple‐Decker Single‐Molecule Magnet Prepared Using a π‐Extended Phthalocyaninato Ligand with Two Coordination Sites
Author(s) -
Katoh Keiichi,
Morita Takaumi,
Yasuda Nobuhiro,
Wernsdorfer Wolfgang,
Kitagawa Yasutaka,
Breedlove Brian K.,
Yamashita Masahiro
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201804100
Subject(s) - dysprosium , single molecule magnet , magnetization , crystallography , chemistry , coordination geometry , ligand (biochemistry) , relaxation (psychology) , lanthanide , dimer , molecule , spin (aerodynamics) , condensed matter physics , ion , physics , inorganic chemistry , magnetic field , hydrogen bond , social psychology , psychology , receptor , biochemistry , organic chemistry , quantum mechanics , thermodynamics
The magnetic properties and spin relaxation processes of a tetranuclear dysprosium(III) fused phthalocyaninato (Pc 4− ) quintuple‐decker single‐molecule magnet (SMM) ( 1 ) with non‐equivalent octa‐coordination geometries are reported. The structure of 1 is regarded as a dimer of Dy 3+ ‐Pc triple‐decker SMMs with different magnetic relaxation characteristics, corresponding to the octa‐coordination geometry sites Dy1 with C 4 symmetry ( ϕ 1 =23°) and Dy2 with D 4 d symmetry ( ϕ 2 =45°). In an H dc of 1750 Oe and T range of 1.8–3.75 K, the quantum tunnelling of the magnetization was suppressed, and the direct process was enhanced. The effects of the coordination geometry on the spin relaxation phenomena are examined.