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Bimetallic iron(3+) spin-crossover complexes containing a 2,2'-bithienyl bridging bis-QsalH ligand.

Content Provider	Semantic Scholar
Author	Djukic, Brandon Poddutoori, Prashanth K. Dube, Paul A. Seda, Takele B. Jenkins, Hilary Anne. Lemaire, Martin T.
Copyright Year	2009
Abstract	We describe the synthesis of a new 3,3'-diethynyl-2,2'-bithienyl bridging bis-QsalH ligand (5), and the preparation of four bimetallic iron(3+) complexes containing 5 with Cl(-) (6), SCN(-) (7), PF(6)(-) (8), and ClO(4)(-) (9) counteranions. We show with variable temperature magnetic susceptibility, Mossbauer, and electron paramagnetic resonance (EPR) spectroscopy that each complex undergoes a spin-crossover in the solid state. In all four complexes, we observe very gradual and incomplete S = 5/2, 5/2 to S = 1/2, 1/2 spin-crossover processes, with three of the four complexes exhibiting nearly identical magnetic properties. We investigated the electronic properties of the complexes by cyclic and differential pulse voltammetry, and attempted electropolymerization reactions with acetonitrile solutions of the complexes, which were not successful. Each complex features a single iron(3+) reduction wave at approximately -0.7 V (versus ferrocene), and the oxidation of the 2,2'-bithienyl substituent occurs at +1.1 V. These materials represent a new structural paradigm for the study of rare bimetallic iron(3+) spin-crossover complexes.
Starting Page	366
Ending Page	371
Page Count	6
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://faculty.wwu.edu/sedat/Martin1.pdf
PubMed reference number	19432469v1
Alternate Webpage(s)	https://doi.org/10.1021/ic9004938
DOI	10.1021/ic9004938
Journal	Inorganic chemistry
Volume Number	48
Issue Number	13
Language	English
Access Restriction	Open
Subject Keyword	Attempt Bisphenol A-Glycidyl Methacrylate Homopolymer Carmustine Electron Spin Resonance Spectroscopy Exhibits as Topic Ions Ligands Partial Preparation Solutions acetonitrile ferrocene ferrous lactate oxidation
Content Type	Text
Resource Type	Article

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