Date of Award
Winter 12-15-2016
Degree Name
Doctor of Philosophy (PhD)
Degree Type
Dissertation
Abstract
The molecular design and photophysical characteristics of synthetic strongly coupled tetrapyrrole arrays are discussed. In these arrays, tetrapyrroles and auxillary chromophores such as perylenes are covalently connected by organic conjugated alkyne linkers, ensuring the strong electronic coupling among these chromophores. The intense electronic communication among these chromophores alter the nature of electronic structures in these chromophores, so the photophysical properties such as optical absorption/emission spectra and excited-state decay pathways are significantly changed from those of individual chromophores. The chemical structural factors such as linker position on each tetrapyrrole, linker identity, and the tetrapyrrole nature determine the electronic coupling nature. The first part describes how the electronic coupling between two identical hydroporphyrins (chlorin, bacteriochlorin) affects their electronic structures. The second part describes how the electronic coupling among different chromophores (porphyrin and perylenes) affects their electronic structures. The panchromatic absorption arisen from this type of electronic coupling is discussed, leading into the detailed study of the integrated molecular array of panchromatic absorption and charge separation. All these studies address the design strategy of synthetic strongly coupled tetrapyrrole arrays for solar-energy conversion and photomedicine.
Language
English (en)
Chair and Committee
Dewey Holten
Committee Members
Robert Blankenship, Richard Mabbs, Liviu Mirica, Elijah Thimsen
Recommended Citation
Kang, Hyun Suk, "Connections among Chemical Composition, Electronic Structure and Photophysical Properties of Strongly Coupled Tetrapyrroles" (2016). Arts & Sciences Electronic Theses and Dissertations. 995.
https://openscholarship.wustl.edu/art_sci_etds/995
Comments
Permanent URL: https://doi.org/10.7936/K7QN655W