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Title: Electrochemical and optical studies on model photosynthetic systems: Progress report for the period 7/1/84 to 12/1/86

Abstract

Objective of this research is to study the relation between the structure of photosynthetic pigments and their spectroscopic and electrochemical properties. Model systems under study progress from the least ordered (solutions) through the most highly ordered (Langmuir-Blodgett (LB) monolayers) systems containing BChl, BPheo, and UQ. Vesicles, intermediate between solutions and LB monolayers, are also under investigation. Molecules other than the photosynthetic pigments and quinones have been examined, including chromophores (i.e., surface active cyanine dyes and phthalocyanines) and redox active compounds (methyl viologen (MV) and surfactant ferrocenes), in order to develop the techniques needed to study the photosynthetic components. The chlorophylls are photosensitive and labile. Thus, it is easier first to develop procedures using stable species. During this period, we have focused on the application of electrochemical methods for determining the heterogeneous electron transfer rate constants of BChl and BPheo at metal electrodes (Pt and Au). We have also determined the effect of adsorption on the redox properties of quinones. Resonance Raman (RR) and surface enhanced resonance Raman (SERR) spectroscopy were used to study solution and surface species.

Authors:
Publication Date:
Research Org.:
Nebraska Univ., Lincoln (USA). Dept. of Chemistry
OSTI Identifier:
6773422
Report Number(s):
DOE/ER/13261-1
ON: DE87010086
DOE Contract Number:  
FG02-84ER13261
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; PHOTOSYNTHETIC REACTION CENTERS; RESEARCH PROGRAMS; ADSORPTION; ELECTRODES; ELECTRON TRANSFER; LAYERS; PHOTOELECTROCHEMICAL CELLS; PHOTOSYNTHESIS; PIGMENTS; QUINONES; REDOX REACTIONS; AROMATICS; CHEMICAL REACTIONS; ELECTROCHEMICAL CELLS; EQUIPMENT; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; PHOTOCHEMICAL REACTIONS; SOLAR EQUIPMENT; SORPTION; SYNTHESIS; 140505* - Solar Energy Conversion- Photochemical, Photobiological, & Thermochemical Conversion- (1980-)

Citation Formats

Cotton, T M. Electrochemical and optical studies on model photosynthetic systems: Progress report for the period 7/1/84 to 12/1/86. United States: N. p., 1986. Web.
Cotton, T M. Electrochemical and optical studies on model photosynthetic systems: Progress report for the period 7/1/84 to 12/1/86. United States.
Cotton, T M. 1986. "Electrochemical and optical studies on model photosynthetic systems: Progress report for the period 7/1/84 to 12/1/86". United States.
@article{osti_6773422,
title = {Electrochemical and optical studies on model photosynthetic systems: Progress report for the period 7/1/84 to 12/1/86},
author = {Cotton, T M},
abstractNote = {Objective of this research is to study the relation between the structure of photosynthetic pigments and their spectroscopic and electrochemical properties. Model systems under study progress from the least ordered (solutions) through the most highly ordered (Langmuir-Blodgett (LB) monolayers) systems containing BChl, BPheo, and UQ. Vesicles, intermediate between solutions and LB monolayers, are also under investigation. Molecules other than the photosynthetic pigments and quinones have been examined, including chromophores (i.e., surface active cyanine dyes and phthalocyanines) and redox active compounds (methyl viologen (MV) and surfactant ferrocenes), in order to develop the techniques needed to study the photosynthetic components. The chlorophylls are photosensitive and labile. Thus, it is easier first to develop procedures using stable species. During this period, we have focused on the application of electrochemical methods for determining the heterogeneous electron transfer rate constants of BChl and BPheo at metal electrodes (Pt and Au). We have also determined the effect of adsorption on the redox properties of quinones. Resonance Raman (RR) and surface enhanced resonance Raman (SERR) spectroscopy were used to study solution and surface species.},
doi = {},
url = {https://www.osti.gov/biblio/6773422}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Dec 01 00:00:00 EST 1986},
month = {Mon Dec 01 00:00:00 EST 1986}
}

Technical Report:
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