Modifying the coordination sphere of bismuth and tungsten: synthesis and applications

van Ingen, Yara 2024. Modifying the coordination sphere of bismuth and tungsten: synthesis and applications. PhD Thesis, Cardiff University. Item availability restricted.

	PDF - Accepted Post-Print Version Restricted to Repository staff only until 8 November 2029 due to copyright restrictions. Download (13MB)
	PDF (Cardiff University Electronic Publication Form) - Supplemental Material Restricted to Repository staff only Download (138kB)

Abstract

This thesis explores modification of the coordination sphere around a metal centre by synthetic and computational means. The work is divided into two parts, based on the targeted application of the metal species. The first part targets the activation of small molecules and explores Lewis acidic catalytic activity. The second part explores the application of the metal species as precursors for the deposition of thin-films in semiconductor devices. Bismuth is the central element in the first four chapters of this thesis, and the fifth chapter focuses on tungsten. Chapter 1 forms the introduction to this thesis and focuses on the chemical and physical properties of bismuth. Examples of catalytic and material applications of bismuth species from the literature are discussed to set the scene for the following part. Chapter 2 covers the usage of half-pincer dimethylamine ligands to stabilisation Bi(III) cations. The coordination sphere around the Bi centre is tuned by incorporating a hypersilyl ligand, generating a hydridoborate species and the reductive formation of a Bi8 cluster. Chapter 3 is focused on bismuth species with fluoride ligands. The oxidation to Bi(V) is reported, a cationic Bi dimer with a μ 2 -bridged fluoride is formed and the reductive elimination of a fluorinated ligand is discussed. Chapter 4 discusses thin-film deposition Bi precursors. The utilisation of alkoxide, amide, silylamide and aromatic ligands and the resultant physical properties of the precursors are explored. Chapter 5 describes tungsten thin-film deposition precursors. Different bond orders between tungsten and nitrogen- or carbon-based ligands are compared and their resultant physical properties discussed.

Item Type:	Thesis (PhD)
Date Type:	Completion
Status:	Unpublished
Schools:	Chemistry
Date of First Compliant Deposit:	8 November 2024
Last Modified:	02 Dec 2024 11:35
URI:	https://orca.cardiff.ac.uk/id/eprint/173757

Actions (repository staff only)

Edit Item