Date of Graduation
5-2022
Document Type
Dissertation
Degree Name
Doctor of Philosophy in Chemistry (PhD)
Degree Level
Graduate
Department
Chemistry & Biochemistry
Advisor/Mentor
McIntosh, Matthias C.
Committee Member
Coridan, Robert H.
Second Committee Member
Lay, Jackson O. Jr.
Third Committee Member
Zheng, Nan
Fourth Committee Member
Pulay, Peter
Keywords
CO2 fixation; Metal organic frameworks; Tandem catalysis; Thin films
Abstract
Metal-organic frameworks (MOFs) are crystalline, porous materials comprised of symmetric organic linkers coordinated to positively charged metal atoms or metal oxide nodes. This dissertation uses strategies in crystal engineering to advance the study of functional MOFs with emphasis on thin film deposition. The first chapter of this dissertation will introduce the field of reticular chemistry to the reader and describe synthetic efforts to develop useful building blocks for MOF materials: namely porphyrin macrocycles and carboxylate capped zirconium-oxo and hafnium-oxo clusters. The building blocks for MOFs developed in the first chapter will be employed in the second and third chapters through incorporation into MOF thin films through molecular deposition and bulk deposition respectively. New methods for the molecular deposition of Hf-based MOF films are described which will expand the available MOF types which are known to be deposited in a molecular layer-by-layer fashion. A key methodology is the use of Hf-oxo clusters capped by carboxylate ligands to be used as a potential Hf source for molecular layer-by-layer Hf-MOF deposition. Using an automated epitaxial workstation, films of UiO-66 (Hf) are fabricated for the first time and porphyrinic Hf-based MOFs are developed for catalytic applications. Following these efforts, experiments regarding the bulk-deposition of UiO-66 and UiO-66 (Hf) films are laid out. The UiO-66 (Hf) bulk deposited films are shown to be a promising catalyst for CO2 fixation to epoxides for cyclic carbonate synthesis.
Citation
Ozdemir, J. (2022). Fabrication of MOF Films of UiO or PCN Type Through Layer-by-Layer Molecular Deposition as well as Bulk Deposition for Catalytic Applications. Graduate Theses and Dissertations Retrieved from https://scholarworks.uark.edu/etd/4404
