Single Ion Anisotropy of CrIII and FeIII in a Series of {Ti7M} Rings

被引：2

作者：

Kostopoulos, Andreas K. ^{[1
,2
]}

Timco, Grigore A. ^{[1
,2
]}

Tuna, Floriana ^{[1
,2
]}

Vitorica-Yrezabal, Inigo J. ^{[1
,2
]}

Whitehead, George F. S. ^{[1
,2
]}

Bamberger, Heiko ^{[3
]}

van Slageren, Joris ^{[3
]}

Collison, David ^{[1
,2
]}

McInnes, Eric J. L. ^{[1
,2
]}

Winpenny, Richard E. P. ^{[1
,2
]}

机构：

[1] Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England

[2] Univ Manchester, Photon Sci Inst, Manchester M13 9PL, Lancs, England

[3] Univ Stuttgart, Inst Phys Chem, Pfaffenwaldring 55, D-70569 Stuttgart, Germany

来源：

APPLIED MAGNETIC RESONANCE | 2020年 / 51卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

SPIN-LATTICE-RELAXATION; MAGNETIC-ANISOTROPY; EPR SPECTROSCOPY; FIELD; COMPLEXES; FAMILY;

D O I：

10.1007/s00723-020-01285-z

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

A series of heterometallic [(Ti7MIII)-M-IV] rings are reported which contain a single paramagnetic metal centre, either Fe-III or Cr-III. The structures contain an octagon of metals bridged by oxides within the ring and pivalate ligands outside the ring. The structures encapsulate a single cation, either a secondary ammonium cation or a cesium. Multi-frequency EPR spectroscopy was used to measure the zero-field splitting parameters for the paramagnetic metal sites. The Fe-III sites have rhombic anisotropy, with D around - 0.18 cm(-1) and lambda (= D/E) approximately 0.25. The Cr-III have a more axial anisotropy, with D around - 0.5 cm(-1) and lambda around 0.05. Attempts to find a magneto-structural correlation are vitiated by the difficulty of refining the challenging crystal structures.

引用

页码：1251 / 1265

页数：15

共 25 条

[1] Synthesis of monodispersed magnetite nanoparticles from iron pivalate clusters [J].