10.1021/cg401930n.s002
Gregor Fornalczyk
Gregor
Fornalczyk
Martin Valldor
Martin
Valldor
Sanjay Mathur
Sanjay
Mathur
Monomeric Iron Heteroarylalkenolates: Structural Design
Concepts and Investigations on Their Application in Chemical Vapor
Deposition
American Chemical Society
2014
metal chelator
FeIII precursor
iron oxide layers
Monomeric Iron Heteroarylalkenolates
10 K
iron atoms
nonmagnetic ground state
Structural Design Concepts
DMTTFP
Al 2O substrate
Chemical Vapor DepositionAryl
chemical vapor deposition
Magnetic investigations
FeIII centers
monomeric precursors
decomposition behavior
2014-04-02 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Monomeric_Iron_Heteroarylalkenolates_Structural_Design_Concepts_and_Investigations_on_Their_Application_in_Chemical_Vapor_Deposition/2310082
Aryl
substituted β-alkenol 1-(dimethyl-1,3-thiazol-2-yl)-3,3,3-trifluoropropenol
(DMTTFP) was employed as an efficient metal chelator to obtain volatile
monomeric precursors containing Fe<sup>II</sup> and Fe<sup>III</sup> centers. [Fe(DMTTFP)<sub>2</sub>] (<b>1</b>) and [Fe(DMTTFP)<sub>2</sub>(OBu<sup><i>t</i></sup>)] (<b>2</b>)
were synthesized by reacting suitable starting materials with DMTTFP.
The molecular structures were elucidated by single-crystal X-ray diffraction
analyses, which revealed a distorted tetrahedral and a trigonal-bipyramidal
arrangement of ligands around iron atoms in <b>1</b> and <b>2</b>, respectively. Magnetic investigations confirmed [Fe(DMTTFP)<sub>2</sub>] to exhibit a thermally populated spin-state transition that
becomes apparent below 10 K. The high-spin state was gradually transferred
to a low-spin state on cooling, suggesting a nonmagnetic ground state.
[Fe(DMTTFP)<sub>2</sub>(OBu<sup><i>t</i></sup>)] exhibited enhanced stability, sufficient volatility, and decomposition
behavior serving as an efficient Fe<sup>III</sup> precursor for the
growth of iron oxide layers on an Al<sub>2</sub>O<sub>3</sub> substrate
via chemical vapor deposition.