Dynamics of proton transfer from photon-initiated acids in alcohol/water mixtures

A. Suwaiyan; F. Al-Adel; A. Hamdan; Uwe K.A. Klein

doi:10.1021/j100382a021

Dynamics of proton transfer from photon-initiated acids in alcohol/water mixtures

A. Suwaiyan^*, F. Al-Adel, A. Hamdan, Uwe K.A. Klein

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Proton transfer from the excited state of 8-hydroxypyrene-1,3,6-trisulfonate (HOPTS) to water is studied in water/alcohol mixtures. The very fast time-dependent decay observed in water becomes slower as the concentration of alcohol is increased, and the decay is single exponential in pure alcohol. The addition of CaCl₂ and urea to the solvent mixture is observed to enhance the dissociation rate of excited HOPTS. These results have been explained by two mechanisms, the geminate dissociation-recombination model and the effect of the water structure. Both mechanisms are believed to contribute to the decay rate of aromatic acids in water/alcohol mixtures.

Original language	English
Pages (from-to)	7423-7429
Number of pages	7
Journal	Journal of Physical Chemistry
Volume	94
Issue number	19
DOIs	https://doi.org/10.1021/j100382a021
State	Published - 1990

ASJC Scopus subject areas

General Engineering
Physical and Theoretical Chemistry

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10.1021/j100382a021

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@article{2775f078b4f949899ca790693421c7c5,

title = "Dynamics of proton transfer from photon-initiated acids in alcohol/water mixtures",

abstract = "Proton transfer from the excited state of 8-hydroxypyrene-1,3,6-trisulfonate (HOPTS) to water is studied in water/alcohol mixtures. The very fast time-dependent decay observed in water becomes slower as the concentration of alcohol is increased, and the decay is single exponential in pure alcohol. The addition of CaCl2 and urea to the solvent mixture is observed to enhance the dissociation rate of excited HOPTS. These results have been explained by two mechanisms, the geminate dissociation-recombination model and the effect of the water structure. Both mechanisms are believed to contribute to the decay rate of aromatic acids in water/alcohol mixtures.",

author = "A. Suwaiyan and F. Al-Adel and A. Hamdan and Klein, \{Uwe K.A.\}",

year = "1990",

doi = "10.1021/j100382a021",

language = "English",

volume = "94",

pages = "7423--7429",

journal = "Journal of Physical Chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

number = "19",

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TY - JOUR

T1 - Dynamics of proton transfer from photon-initiated acids in alcohol/water mixtures

AU - Suwaiyan, A.

AU - Al-Adel, F.

AU - Hamdan, A.

AU - Klein, Uwe K.A.

PY - 1990

Y1 - 1990

N2 - Proton transfer from the excited state of 8-hydroxypyrene-1,3,6-trisulfonate (HOPTS) to water is studied in water/alcohol mixtures. The very fast time-dependent decay observed in water becomes slower as the concentration of alcohol is increased, and the decay is single exponential in pure alcohol. The addition of CaCl2 and urea to the solvent mixture is observed to enhance the dissociation rate of excited HOPTS. These results have been explained by two mechanisms, the geminate dissociation-recombination model and the effect of the water structure. Both mechanisms are believed to contribute to the decay rate of aromatic acids in water/alcohol mixtures.

AB - Proton transfer from the excited state of 8-hydroxypyrene-1,3,6-trisulfonate (HOPTS) to water is studied in water/alcohol mixtures. The very fast time-dependent decay observed in water becomes slower as the concentration of alcohol is increased, and the decay is single exponential in pure alcohol. The addition of CaCl2 and urea to the solvent mixture is observed to enhance the dissociation rate of excited HOPTS. These results have been explained by two mechanisms, the geminate dissociation-recombination model and the effect of the water structure. Both mechanisms are believed to contribute to the decay rate of aromatic acids in water/alcohol mixtures.

UR - https://www.scopus.com/pages/publications/0001681658

U2 - 10.1021/j100382a021

DO - 10.1021/j100382a021

M3 - Article

AN - SCOPUS:0001681658

SN - 0022-3654

VL - 94

SP - 7423

EP - 7429

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

IS - 19

ER -

Dynamics of proton transfer from photon-initiated acids in alcohol/water mixtures

Abstract

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