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A Dy 2 Dimer Embedded in One Salen‐type Ligand with Different Local Symmetries Behaves as Zero‐field Single‐Molecule Magnet
Author(s) -
Yang JingWei,
Yang ZhaoFu,
Chen Peng,
Tian YongMei,
Sun WenBin
Publication year - 2018
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201800001
Subject(s) - crystallography , chemistry , ion , square antiprism , magnetization , lanthanide , ligand (biochemistry) , dimer , ferromagnetism , single molecule magnet , relaxation (psychology) , molecule , magnetic field , condensed matter physics , physics , biochemistry , receptor , quantum mechanics , social psychology , psychology , organic chemistry
A salen‐type Dy 2 complex [Dy 2 (L)(MeOH) 2 (CH 3 COO) 4 ] · 2(MeOH) was isolated and magnetically characterized, in which one hexadentate ligand H 2 L [H 2 L = N , N ‐bis(2‐oxy‐3‐methoxybenzylidene)‐1,2‐phenylenediamine] chelated two Dy III ions, one is located on the apical position of the inner N 2 O 2 site, leaving the outer O 2 O 2 cavity for another Dy III ion. There are two distinct local coordination environments presented as square antiprism ( D 4 d ) for Dy1 and biaugmented trigonal prism ( C 2 v ) for Dy2. Magnetic measurements reveal that the ferromagnetic interaction between two Dy III ions occurred within low temperature range and accompanied with significant slow magnetic relaxation behavior with energy barriers to the reversal of magnetization U eff / K B = 40 K under zero dc field.