Dual fluorescence of ester derivatives of dialkylaniline in polymer matrices: a time-resolved fluorescence study using picosecond dye laser pulses as excitation source

Khader A. Al-Hassan

doi:10.1016/1010-6030(94)03832-5

Dual fluorescence of ester derivatives of dialkylaniline in polymer matrices: a time-resolved fluorescence study using picosecond dye laser pulses as excitation source

Khader A. Al-Hassan^*

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

6 Scopus citations

Abstract

Using time-resolved fluorescence (TRF) measurements, it is shown that, for p-N,N-dimethylamino-benzoic acid ethylester (DMABEE) and p-N,N-diethylamino-benzoic acid ethylester (DEABEE) in polymethacrylate (poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA), poly(butyl methacrylate) (PBMA) and poly(hexyl methacrylate) (PHMA)) matrices, the rate of formation and lifetime of the twisted intramolecular charge transfer (TICT) state are determined by the opposing roles of the polarity and the free volume of the polymer sites. The TRF spectra increase with increasing time after excitation, and the most intense spectra are observed in PHMA, which is the least polar and least viscous in this series of polymers. The role of the angle of pretwist of the donor substituent in TICT state formation is confirmed.

Original language	English
Pages (from-to)	207-211
Number of pages	5
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	84
Issue number	2
DOIs	https://doi.org/10.1016/1010-6030(94)03832-5
State	Published - 6 Dec 1994

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Physics and Astronomy

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10.1016/1010-6030(94)03832-5

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@article{9b78302092e3490894ee5c9101d1a5a5,

title = "Dual fluorescence of ester derivatives of dialkylaniline in polymer matrices: a time-resolved fluorescence study using picosecond dye laser pulses as excitation source",

abstract = "Using time-resolved fluorescence (TRF) measurements, it is shown that, for p-N,N-dimethylamino-benzoic acid ethylester (DMABEE) and p-N,N-diethylamino-benzoic acid ethylester (DEABEE) in polymethacrylate (poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA), poly(butyl methacrylate) (PBMA) and poly(hexyl methacrylate) (PHMA)) matrices, the rate of formation and lifetime of the twisted intramolecular charge transfer (TICT) state are determined by the opposing roles of the polarity and the free volume of the polymer sites. The TRF spectra increase with increasing time after excitation, and the most intense spectra are observed in PHMA, which is the least polar and least viscous in this series of polymers. The role of the angle of pretwist of the donor substituent in TICT state formation is confirmed.",

author = "Al-Hassan, \{Khader A.\}",

year = "1994",

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doi = "10.1016/1010-6030(94)03832-5",

language = "English",

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journal = "Journal of Photochemistry and Photobiology A: Chemistry",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Dual fluorescence of ester derivatives of dialkylaniline in polymer matrices

T2 - a time-resolved fluorescence study using picosecond dye laser pulses as excitation source

AU - Al-Hassan, Khader A.

PY - 1994/12/6

Y1 - 1994/12/6

N2 - Using time-resolved fluorescence (TRF) measurements, it is shown that, for p-N,N-dimethylamino-benzoic acid ethylester (DMABEE) and p-N,N-diethylamino-benzoic acid ethylester (DEABEE) in polymethacrylate (poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA), poly(butyl methacrylate) (PBMA) and poly(hexyl methacrylate) (PHMA)) matrices, the rate of formation and lifetime of the twisted intramolecular charge transfer (TICT) state are determined by the opposing roles of the polarity and the free volume of the polymer sites. The TRF spectra increase with increasing time after excitation, and the most intense spectra are observed in PHMA, which is the least polar and least viscous in this series of polymers. The role of the angle of pretwist of the donor substituent in TICT state formation is confirmed.

AB - Using time-resolved fluorescence (TRF) measurements, it is shown that, for p-N,N-dimethylamino-benzoic acid ethylester (DMABEE) and p-N,N-diethylamino-benzoic acid ethylester (DEABEE) in polymethacrylate (poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA), poly(butyl methacrylate) (PBMA) and poly(hexyl methacrylate) (PHMA)) matrices, the rate of formation and lifetime of the twisted intramolecular charge transfer (TICT) state are determined by the opposing roles of the polarity and the free volume of the polymer sites. The TRF spectra increase with increasing time after excitation, and the most intense spectra are observed in PHMA, which is the least polar and least viscous in this series of polymers. The role of the angle of pretwist of the donor substituent in TICT state formation is confirmed.

UR - https://www.scopus.com/pages/publications/0011692478

U2 - 10.1016/1010-6030(94)03832-5

DO - 10.1016/1010-6030(94)03832-5

M3 - Article

AN - SCOPUS:0011692478

SN - 1010-6030

VL - 84

SP - 207

EP - 211

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

IS - 2

ER -

Dual fluorescence of ester derivatives of dialkylaniline in polymer matrices: a time-resolved fluorescence study using picosecond dye laser pulses as excitation source

Abstract

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