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Solid-state Spin Equilibrium in Tetrakis(N,N'-diethylthiourea)nickel(II) dichloride, [Ni(detu)4]Cl2: Structural and Thermal Characterization

Alfurayj, Ibrahim A.
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1435790988

Abstract Details

2015, Master of Science (MS), Ohio University, Chemistry (Arts and Sciences).
The spin crossover phenomenon has drawn enormous attention for its possible application as bistable molecules in nanoscale devices. This phenomenon is found primarily in metal ions with d4-d7 electronic configurations in octahedral ligand field, however, spin crossover has been reported for some Ni(II) d8 complexes in the solid-state. Structural changes such as tetragonal modulation play important role in spin crossover, unfortunately, for most Ni(II) spin crossover complexes, structural information from X-ray crystallography is not available. Among the various candidates of Ni(II) complexes exhibiting this anomalous behavior, the complex [Ni(detu)4]Cl2, where detu = N,N'-diethylthiourea, has attracted our focus. This complex displays spin crossover as a response to variation of both temperature and pressure. This study aims to investigate the spin equilibrium in this complex by conducting X-ray crystallography, DFT and TD-DFT calculations. Moreover, the thermochromic effect at low temperature has been investigated as well, and TGA and DSC measurements have been obtained. FTIR spectra of [Ni(detu)4Cl]Cl and free detu ligand have been interpreted and assigned.
Michael P. Jensen (Advisor)
106 p.
Chemistry; Inorganic Chemistry
nickel; spin crossover; spin equilibrium; diethylthiourea; magnetic

Recommended Citations

Citations

  • Alfurayj, I. A. (2015). Solid-state Spin Equilibrium in Tetrakis(N,N'-diethylthiourea)nickel(II) dichloride, [Ni(detu)4]Cl2: Structural and Thermal Characterization [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1435790988

    APA Style (7th edition)

  • Alfurayj, Ibrahim. Solid-state Spin Equilibrium in Tetrakis(N,N'-diethylthiourea)nickel(II) dichloride, [Ni(detu)4]Cl2: Structural and Thermal Characterization . 2015. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1435790988.

    MLA Style (8th edition)

  • Alfurayj, Ibrahim. "Solid-state Spin Equilibrium in Tetrakis(N,N'-diethylthiourea)nickel(II) dichloride, [Ni(detu)4]Cl2: Structural and Thermal Characterization ." Master's thesis, Ohio University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1435790988

    Chicago Manual of Style (17th edition)

ohiou1435790988
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This open access ETD is published by Ohio University and OhioLINK.