Title

Magnetic Bistability in Mononuclear Iron(II) Pyrrolide Complexes and Cyano-bridged Chain Compounds

Abstract

This presentation will describe our efforts to engender high magnetic relaxation barriers in low-dimensional coordination compounds. First, strong magnetic anisotropy in a family of iron(II) pyrrolide complexes is shown to give rise to the first examples of transition metal-based mononuclear single-molecule magnets. The anisotropy and relaxation dynamics of these complexes are examined through an array of magnetic and spectroscopic measurements. Next, a building block approach is employed to install strong coupling in cyano-bridged chain compounds. In particular, simple molecular orbital considerations are used to design and construct the compound (Bu4N)[TpCuReCl4(CN)2], which demonstrates the strongest ferromagnetic coupling ever observed through cyanide. Finally, this approach is extended toward the assembly of a series of single-chain magnets, (DMF)4MReCl4(CN)2 (M = Mn, Fe, Co, Ni). Most notably here, the field-dependent magnetization of the iron analogue exhibits significant hysteresis at low temperature, thus demonstrating classical magnet behavior in a one-dimensional solid.

Meeting Name

242nd National Meeting of the American-Chemical-Society (ACS) (2011: Aug. 28 - Sep. 1, Denver, Colorado)

Department(s)

Chemistry

International Standard Serial Number (ISSN)

0065-7727

Electronic OCLC #

68733575

Print OCLC #

1123848

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2011 American Chemical Society (ACS), All rights reserved.

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