Fluorescence quenching reaction of chlorophyll a by tris(acetylacetonate)iron(III) in various solvents

Chlorophyll a is known as the prevailing light absorbing pigment giving a strong absorption and fluorescence emission in visible region. Quenching reactions of the chlorophyll a fluorescence by Fe(acac)3 were precisely investigated in various organic solvents which are benzene toluene, ethanol, meth...

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Main Authors:	Nararak Leesakul, Daweena Masen, Grampp, Guenter
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2017
Online Access:	http://journalarticle.ukm.my/11360/ http://journalarticle.ukm.my/11360/ http://journalarticle.ukm.my/11360/1/03%20Nararak.pdf

id	ukm-11360
recordtype	eprints
spelling	ukm-113602018-02-13T09:31:43Z http://journalarticle.ukm.my/11360/ Fluorescence quenching reaction of chlorophyll a by tris(acetylacetonate)iron(III) in various solvents Nararak Leesakul, Daweena Masen, Grampp, Guenter Chlorophyll a is known as the prevailing light absorbing pigment giving a strong absorption and fluorescence emission in visible region. Quenching reactions of the chlorophyll a fluorescence by Fe(acac)3 were precisely investigated in various organic solvents which are benzene toluene, ethanol, methanol, dmf, dmso and acetonitrile. Electron transfer performance of chlorophyll a by Fe(acac)3 was investigated from oxidative quenching reaction. Herein, the simplified Rehm-Weller relationship was used to calculate the free energy change of the photo-induced electron transfer reaction. Emission intensity decreased when the concentration of Fe(acac)3 quencher was increased. Non-linear Stern-Volmer plots are found to be affected by inner filter effect more than the ground state complex formation. Rate of quenching reactions (kq) were determined from the Stern-Volmer equation with corrected inner filter effect. The rates of quenching reactions occurred faster in high viscous solvents. Penerbit Universiti Kebangsaan Malaysia 2017-09 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/11360/1/03%20Nararak.pdf Nararak Leesakul, and Daweena Masen, and Grampp, Guenter (2017) Fluorescence quenching reaction of chlorophyll a by tris(acetylacetonate)iron(III) in various solvents. Sains Malaysiana, 46 (9). pp. 1369-1377. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol46num9_2017/contentsVol46num9_2017.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	Chlorophyll a is known as the prevailing light absorbing pigment giving a strong absorption and fluorescence emission in visible region. Quenching reactions of the chlorophyll a fluorescence by Fe(acac)3 were precisely investigated in various organic solvents which are benzene toluene, ethanol, methanol, dmf, dmso and acetonitrile. Electron transfer performance of chlorophyll a by Fe(acac)3 was investigated from oxidative quenching reaction. Herein, the simplified Rehm-Weller relationship was used to calculate the free energy change of the photo-induced electron transfer reaction. Emission intensity decreased when the concentration of Fe(acac)3 quencher was increased. Non-linear Stern-Volmer plots are found to be affected by inner filter effect more than the ground state complex formation. Rate of quenching reactions (kq) were determined from the Stern-Volmer equation with corrected inner filter effect. The rates of quenching reactions occurred faster in high viscous solvents.
format	Article
author	Nararak Leesakul, Daweena Masen, Grampp, Guenter
spellingShingle	Nararak Leesakul, Daweena Masen, Grampp, Guenter Fluorescence quenching reaction of chlorophyll a by tris(acetylacetonate)iron(III) in various solvents
author_facet	Nararak Leesakul, Daweena Masen, Grampp, Guenter
author_sort	Nararak Leesakul,
title	Fluorescence quenching reaction of chlorophyll a by tris(acetylacetonate)iron(III) in various solvents
title_short	Fluorescence quenching reaction of chlorophyll a by tris(acetylacetonate)iron(III) in various solvents
title_full	Fluorescence quenching reaction of chlorophyll a by tris(acetylacetonate)iron(III) in various solvents
title_fullStr	Fluorescence quenching reaction of chlorophyll a by tris(acetylacetonate)iron(III) in various solvents
title_full_unstemmed	Fluorescence quenching reaction of chlorophyll a by tris(acetylacetonate)iron(III) in various solvents
title_sort	fluorescence quenching reaction of chlorophyll a by tris(acetylacetonate)iron(iii) in various solvents
publisher	Penerbit Universiti Kebangsaan Malaysia
publishDate	2017
url	http://journalarticle.ukm.my/11360/ http://journalarticle.ukm.my/11360/ http://journalarticle.ukm.my/11360/1/03%20Nararak.pdf
first_indexed	2023-09-18T20:00:05Z
last_indexed	2023-09-18T20:00:05Z
_version_	1777406789942247424

Fluorescence quenching reaction of chlorophyll a by tris(acetylacetonate)iron(III) in various solvents

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