fulltext.study @t Gmail

Negative shift of chlorophyll a oxidation potential by aggregation in acetonitrile/ionic liquid mixed solvents

Paper ID Volume ID Publish Year Pages File Format Full-Text
28277 44067 2009 5 PDF Available
Title
Negative shift of chlorophyll a oxidation potential by aggregation in acetonitrile/ionic liquid mixed solvents
Abstract

Spectroscopic and electrochemical properties of chlorophyll (Chl) a aggregates in mixed solvents of acetonitrile and an ionic liquid, 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4), were examined. The red-shifted absorption peak of the Qy band due to Chl a aggregation as well as the log[Chl a aggregate] against log[Chl a monomer] plot suggested the formation of low-order aggregates such as a dimer. Square wave voltammetry revealed that the first oxidation potential of the Chl a aggregate in the AN/EMIBF4 mixed solvents is shifted negatively by 130 mV from that of Chl a monomer. In comparison with the redox potential of Chl a in vivo, a tuning mechanism of the redox potentials for photosynthetic species due to dimerization/aggregation is discussed.

Keywords
Chl, chlorophyll; EMIBF4, 1-ethyl-3-methylimidazolium tetrafluoroborate; AN, acetonitrile; SWV, square wave voltammetryPhotosynthesis; Chlorophyll; Dimerization; Aggregation
First Page Preview
Negative shift of chlorophyll a oxidation potential by aggregation in acetonitrile/ionic liquid mixed solvents
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 202, Issues 2–3, 25 February 2009, Pages 191–195
Authors
, , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us