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A Series of High‐nuclear 3 d ‐4 f (Fe III 8 Ln III 2 ) Complexes: Syntheses, Structures, and Magnetic Properties
Author(s) -
Zhao XiaoQing,
Wang YiYan,
Bao DongXu,
Zhang FenHang,
Wu Wei,
Xu FuSen,
Zhang QiuHong,
Li YunChun
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5222
Subject(s) - chemistry , isostructural , pivalic acid , crystallography , antiferromagnetism , ferromagnetism , molecule , ion , lanthanide , crystal structure , single molecule magnet , magnetization , stereochemistry , condensed matter physics , magnetic field , biochemistry , physics , quantum mechanics , catalysis , organic chemistry
Six novel decanuclear clusters with formula of {[Fe 8 Ln 2 (O) 4 (OH) 4 (EtO) 2 (dhbp) 4 (dhbpH) 2 (piv) 6 ]·4EtOH} (Ln = Y ( 1 ), Gd ( 2 ), Tb ( 3 ), Dy ( 4 ), Ho ( 5 ), Er ( 6 ), dhbpH 2 = 6,6′‐dihydroxyl‐2,2′‐bipyridine, Hpiv = pivalic acid, EtOH = ethanol) have been synthesized and characterized. Single‐crystal and powder X‐ray diffraction analyses reveal that complexes 1 – 6 are isostructural and show a sandwich‐like Fe III 8 Ln III 2 structure, in which the [Ln 2 ] unit is sandwiched by two planar [Fe 4 ] units. Magnetic properties of complexes 1 – 6 have been investigated and display dominant antiferromagnetic interactions, thereinto, complexes 4 and 6 display weak ferromagnetic behaviors associated with Ln III ions, while others are antiferromagnetic‐like features. Furthermore, complex 4 (Fe III 8 Dy III 2 ) shows temperature/frequency‐dependent ac signals with an energy barrier of 4.1 K, indicating that complex 4 should be a single‐molecule magnet (SMM)
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