Association of chlorophyll with inverted micelles of dodecylpyridinium iodide in toluene

G. R. Seely, X. C. Ma, R. A. Nieman, John Devens Gust

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Dodecylpyridinium iodide forms inverted micelles in water-containing toluene at concentrations higher than 10-4 M, as it reportedly does in other nonpolar solvents. Micelle formation is characterized by changes in the charge-transfer absorption band, and in the chemical shifts of protons, especially those on or near the pyridinium group. The micelles associate with chlorophyll a, also dissolved in the toluene, as evidenced by large changes in the chemical shift of some of the surfactant and the chlorophyll resonances. Temperature effects are small and are consistent with a loosening of the association at higher temperatures (to 345 K). The fluorescence quantum yield of chlorophyll is little reduced by the presence of 10-3 M 2,2′-dithiobis(5-nitropyridine), a quencher which is soluble in toluene and probably associates weakly with the micelles, but is strongly reduced by the presence of the bis(tetramethylammonium) salt of 5,5′-dithiobis(2-nitrobenzoic acid), which is solubilized only in the presence of the inverted micelles, and furthermore forms a complex with chlorophyll. These cationic inverted micelles constitute a new environment for the pursuit of chlorophyll model system investigations.

Original languageEnglish
Pages (from-to)1581-1586
Number of pages6
JournalJournal of Physical Chemistry
Volume94
Issue number4
Publication statusPublished - 1990

Fingerprint

Toluene
Micelles
Iodides
chlorophylls
Chlorophyll
iodides
toluene
micelles
Chemical shift
chemical equilibrium
Nitrobenzoates
Quantum yield
Surface-Active Agents
Thermal effects
temperature effects
Protons
Charge transfer
Absorption spectra
Surface active agents
Salts

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Association of chlorophyll with inverted micelles of dodecylpyridinium iodide in toluene. / Seely, G. R.; Ma, X. C.; Nieman, R. A.; Gust, John Devens.

In: Journal of Physical Chemistry, Vol. 94, No. 4, 1990, p. 1581-1586.

Research output: Contribution to journalArticle

@article{bf52ded62e6d4801ab3fbff970675085,
title = "Association of chlorophyll with inverted micelles of dodecylpyridinium iodide in toluene",
abstract = "Dodecylpyridinium iodide forms inverted micelles in water-containing toluene at concentrations higher than 10-4 M, as it reportedly does in other nonpolar solvents. Micelle formation is characterized by changes in the charge-transfer absorption band, and in the chemical shifts of protons, especially those on or near the pyridinium group. The micelles associate with chlorophyll a, also dissolved in the toluene, as evidenced by large changes in the chemical shift of some of the surfactant and the chlorophyll resonances. Temperature effects are small and are consistent with a loosening of the association at higher temperatures (to 345 K). The fluorescence quantum yield of chlorophyll is little reduced by the presence of 10-3 M 2,2′-dithiobis(5-nitropyridine), a quencher which is soluble in toluene and probably associates weakly with the micelles, but is strongly reduced by the presence of the bis(tetramethylammonium) salt of 5,5′-dithiobis(2-nitrobenzoic acid), which is solubilized only in the presence of the inverted micelles, and furthermore forms a complex with chlorophyll. These cationic inverted micelles constitute a new environment for the pursuit of chlorophyll model system investigations.",
author = "Seely, {G. R.} and Ma, {X. C.} and Nieman, {R. A.} and Gust, {John Devens}",
year = "1990",
language = "English",
volume = "94",
pages = "1581--1586",
journal = "Journal of Physical Chemistry",
issn = "0022-3654",
publisher = "American Chemical Society",
number = "4",

}

TY - JOUR

T1 - Association of chlorophyll with inverted micelles of dodecylpyridinium iodide in toluene

AU - Seely, G. R.

AU - Ma, X. C.

AU - Nieman, R. A.

AU - Gust, John Devens

PY - 1990

Y1 - 1990

N2 - Dodecylpyridinium iodide forms inverted micelles in water-containing toluene at concentrations higher than 10-4 M, as it reportedly does in other nonpolar solvents. Micelle formation is characterized by changes in the charge-transfer absorption band, and in the chemical shifts of protons, especially those on or near the pyridinium group. The micelles associate with chlorophyll a, also dissolved in the toluene, as evidenced by large changes in the chemical shift of some of the surfactant and the chlorophyll resonances. Temperature effects are small and are consistent with a loosening of the association at higher temperatures (to 345 K). The fluorescence quantum yield of chlorophyll is little reduced by the presence of 10-3 M 2,2′-dithiobis(5-nitropyridine), a quencher which is soluble in toluene and probably associates weakly with the micelles, but is strongly reduced by the presence of the bis(tetramethylammonium) salt of 5,5′-dithiobis(2-nitrobenzoic acid), which is solubilized only in the presence of the inverted micelles, and furthermore forms a complex with chlorophyll. These cationic inverted micelles constitute a new environment for the pursuit of chlorophyll model system investigations.

AB - Dodecylpyridinium iodide forms inverted micelles in water-containing toluene at concentrations higher than 10-4 M, as it reportedly does in other nonpolar solvents. Micelle formation is characterized by changes in the charge-transfer absorption band, and in the chemical shifts of protons, especially those on or near the pyridinium group. The micelles associate with chlorophyll a, also dissolved in the toluene, as evidenced by large changes in the chemical shift of some of the surfactant and the chlorophyll resonances. Temperature effects are small and are consistent with a loosening of the association at higher temperatures (to 345 K). The fluorescence quantum yield of chlorophyll is little reduced by the presence of 10-3 M 2,2′-dithiobis(5-nitropyridine), a quencher which is soluble in toluene and probably associates weakly with the micelles, but is strongly reduced by the presence of the bis(tetramethylammonium) salt of 5,5′-dithiobis(2-nitrobenzoic acid), which is solubilized only in the presence of the inverted micelles, and furthermore forms a complex with chlorophyll. These cationic inverted micelles constitute a new environment for the pursuit of chlorophyll model system investigations.

UR - http://www.scopus.com/inward/record.url?scp=33751553054&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33751553054&partnerID=8YFLogxK

M3 - Article

VL - 94

SP - 1581

EP - 1586

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

SN - 0022-3654

IS - 4

ER -