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Publication Date

Fall 2016

Degree Type

Thesis - Campus Access Only

Degree Name

Master of Science (MS)

Department

Chemistry

Advisor

David J. Brook

Keywords

Complex, Grid, Verdazyl

Subject Areas

Chemistry

Abstract

The goal of this research project was to gain a thorough understanding of the self-assembled Fe(II) [2x2] grid complex with a hydrazone based ligand. [2x2] grid complexes have previously shown the propensity to adopt a mixed spin state system in which the electronic configurations of the metal centers are inequivalent. Additionally, these systems have displayed unique magnetic properties such as hysteresis, and stable states under external pressure which make them attractive for many applications including memory devices. The [2x2] grid complex was synthesized according to previous work in the Brook group, UV-Vis spectroscopy was used to confirm formation of the expected grid complex, as well as to probe the electronics of the system. UV-Vis spectroscopy was also used in a series of titrations to gain further insight into the acid base chemistry of the ligands, and to measure the sensitivity of the metal centers to the local protonation events. Magnetic susceptibility for the [2 x 2] grid complex was measured with Evan’s method NMR analysis at various stages of protonation and temperatures to gain insight into the electronic structure of the systems. Comparison of between data from the magnetic susceptibility experiments and similar work which utilized Mӧssbauer spectroscopy suggests that Evan’s method is a suitable and efficient method for the characterization and analysis of electronic states in these grid complexes.

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