Acidity characterization of tungstophosphoric acid supported MCM-41 materials using laser induced fluorescence spectroscopy

Ali A. El-Rayyes; Uwe K.A. Klein

doi:10.1016/j.cplett.2004.09.015

Acidity characterization of tungstophosphoric acid supported MCM-41 materials using laser induced fluorescence spectroscopy

Ali A. El-Rayyes
, Uwe K.A. Klein^*

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

2 Scopus citations

Abstract

Excited state proton transfer reactions of 1-naphthylamine (R-NH₂) adsorbed at the surfaces of tungstophosphoric acid supported MCM-41 materials have been studied using steady state fluorescence and picosecond time correlated single photon counting techniques. Evidence for the formation of X* (an adduct between the R-NH₂ and the acid) showed strongly enhanced surface acidity of the supported MCM-41 materials. The excited state lifetime of X* was used to estimate the surface acidity which was found to be between 9.3 and 10.4 M acidic solution depending upon the solvent used in the loading experiment.

Original language	English
Pages (from-to)	484-487
Number of pages	4
Journal	Chemical Physics Letters
Volume	397
Issue number	4-6
DOIs	https://doi.org/10.1016/j.cplett.2004.09.015
State	Published - 21 Oct 2004

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Acidity characterization of tungstophosphoric acid supported MCM-41 materials using laser induced fluorescence spectroscopy",

abstract = "Excited state proton transfer reactions of 1-naphthylamine (R-NH2) adsorbed at the surfaces of tungstophosphoric acid supported MCM-41 materials have been studied using steady state fluorescence and picosecond time correlated single photon counting techniques. Evidence for the formation of X* (an adduct between the R-NH2 and the acid) showed strongly enhanced surface acidity of the supported MCM-41 materials. The excited state lifetime of X* was used to estimate the surface acidity which was found to be between 9.3 and 10.4 M acidic solution depending upon the solvent used in the loading experiment.",

author = "El-Rayyes, \{Ali A.\} and Klein, \{Uwe K.A.\}",

year = "2004",

month = oct,

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doi = "10.1016/j.cplett.2004.09.015",

language = "English",

volume = "397",

pages = "484--487",

journal = "Chemical Physics Letters",

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TY - JOUR

T1 - Acidity characterization of tungstophosphoric acid supported MCM-41 materials using laser induced fluorescence spectroscopy

AU - El-Rayyes, Ali A.

AU - Klein, Uwe K.A.

PY - 2004/10/21

Y1 - 2004/10/21

N2 - Excited state proton transfer reactions of 1-naphthylamine (R-NH2) adsorbed at the surfaces of tungstophosphoric acid supported MCM-41 materials have been studied using steady state fluorescence and picosecond time correlated single photon counting techniques. Evidence for the formation of X* (an adduct between the R-NH2 and the acid) showed strongly enhanced surface acidity of the supported MCM-41 materials. The excited state lifetime of X* was used to estimate the surface acidity which was found to be between 9.3 and 10.4 M acidic solution depending upon the solvent used in the loading experiment.

AB - Excited state proton transfer reactions of 1-naphthylamine (R-NH2) adsorbed at the surfaces of tungstophosphoric acid supported MCM-41 materials have been studied using steady state fluorescence and picosecond time correlated single photon counting techniques. Evidence for the formation of X* (an adduct between the R-NH2 and the acid) showed strongly enhanced surface acidity of the supported MCM-41 materials. The excited state lifetime of X* was used to estimate the surface acidity which was found to be between 9.3 and 10.4 M acidic solution depending upon the solvent used in the loading experiment.

UR - https://www.scopus.com/pages/publications/7444265746

U2 - 10.1016/j.cplett.2004.09.015

DO - 10.1016/j.cplett.2004.09.015

M3 - Article

AN - SCOPUS:7444265746

SN - 0009-2614

VL - 397

SP - 484

EP - 487

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 4-6

ER -

Acidity characterization of tungstophosphoric acid supported MCM-41 materials using laser induced fluorescence spectroscopy

Abstract

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