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Paramagnetic Resonance Spectroscopy Of Cobalt(II) Tripodal Amines

Batra, Vipul
http://orcid.org/0000-0002-9258-1548
http://rave.ohiolink.edu/etdc/view?acc_num=miami1719315644751612

Abstract Details

2024, Doctor of Philosophy, Miami University, Chemistry and Biochemistry.
This dissertation investigates the magnetic properties of several series of structurally-related molecules. Distinctions in their magnetic properties are studied using multiple spectroscopic techniques, coupled with structural determinations and theoretical calculations. In Chapter 2, a tripodal ligand tris-(2-pyridylmethyl)amine (tpa) and the corresponding series of air-sensitive, high-spin Co(II) complexes are developed by altering one monodentate ligand. Variable temperature paramagnetic relaxation measurements using NMR and structural parameter determination by SC-XRD are presented. Deviations in electronic transitions are studied using EPR and UV-vis. DFT calculations are carried out using ORCA to extensively explore and correlate the data between multiple techniques, enabling a comprehensive analysis of molecular motions. Chapter 3 explores unique examples of a six-coordinate Co(II) complex crystallized in four distinct packing motifs. Using SC-XRD and EPR, the influence of the non-covalent interactions (T-stacking) and the spatial arrangement of a chemical moiety within a molecule are studied on the spin-switch behavior. Multiple solvent VT-NMR, Evan’s NMR, UV-vis, and MS were utilized to substantiate the analyses. Chapter 4 investigates structural dynamics in two novel pentacoordinate Co(II) complexes based on the tripodal ligand tris((1-benzyl-4-triazolyl)methyl)amine (tbta). Utilizing UV-vis, EPR, and VT-NMR, these complexes, featuring an anionic monodentate ligand and tbta were comprehensively investigated in solution. Chapter 5 presents the synthesis and detailed crystallographic structural examination of a unique five-coordinated Co(II) complex. The complex showcases a first-of-its-kind combination of the tripodal ligand tbta and the neutral ligand imidazole.
Michael Crowder (Committee Chair)
David Tierney (Advisor)
Scott Hartley (Committee Member)
Robert McCarrick (Committee Member)
Jason Berberich (Committee Member)
116 p.
Chemistry
Paramagnetic Resonance Spectroscopy; Cobalt(II); Tripodal Amines

Recommended Citations

Citations

  • Batra, V. (2024). Paramagnetic Resonance Spectroscopy Of Cobalt(II) Tripodal Amines [Doctoral dissertation, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1719315644751612

    APA Style (7th edition)

  • Batra, Vipul. Paramagnetic Resonance Spectroscopy Of Cobalt(II) Tripodal Amines. 2024. Miami University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1719315644751612.

    MLA Style (8th edition)

  • Batra, Vipul. "Paramagnetic Resonance Spectroscopy Of Cobalt(II) Tripodal Amines." Doctoral dissertation, Miami University, 2024. http://rave.ohiolink.edu/etdc/view?acc_num=miami1719315644751612

    Chicago Manual of Style (17th edition)

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© 2024, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.
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