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Synthesis and Photophysical Characterization of an Artificial Photosynthetic Reaction Center Exhibiting Acid-Responsive Regulation of Charge Separation


Abstract Non-photochemical quenching (NPQ) is a photoprotective regulatory mechanism essential to the robustness of the photosynthetic apparatus of green plants. Energy flow within the low-light adapted reaction centers is dynamically optimized to match the continuously fluctuating light conditions found in nature. Activated by compartmentalized decreases in pH resulting from photosynthetic activity during periods of elevated photon flux, NPQ induces rapid thermal dissipation of excess excitation energy that would otherwise overwhelm the apparatus’s ability to consume it. Consequently, the frequency of charge separation decreases and the formation of potentially deleterious, high-energy intermediates slows, thereby reducing the threat of photodamage... (more)
Created Date 2015
Contributor Pahk, Ian J. (Author) / Gust, Devens (Advisor) / Gould, Ian (Committee member) / Mujica, Vladimiro (Committee member) / Arizona State University (Publisher)
Subject Organic chemistry / Physical chemistry / Energy / Artificial Photosynthesis / Charge Separation / Non-Photochemical Quenching / Photoprotection / Reaction Center / Regulation
Type Doctoral Dissertation
Extent 103 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Doctoral Dissertation Chemistry 2015
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis