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Excited state intramolecular charge transfer process in 5-(4-dimethylamino-phenyl)-penta-2,4-dienoic acid ethyl ester and effect of acceptor functional groups

Paper ID Volume ID Publish Year Pages File Format Full-Text
26024 43930 2013 10 PDF Available
Title
Excited state intramolecular charge transfer process in 5-(4-dimethylamino-phenyl)-penta-2,4-dienoic acid ethyl ester and effect of acceptor functional groups
Abstract

•Development of highly polarity sensitive fluorescence molecular probe.•Photophysical properties of DMAPPDE in different solvents.•Effect of acceptor functional groups on the intramolecular charge transfer process.•A combined spectroscopic and quantum chemical study of ICT process.

Excited state intramolecular charge transfer (ICT) process in a donor–chromophore–acceptor system 5-(4-dimethylamino-phenyl)-penta-2,4-dienoic acid ethyl ester (DMAPPDE) has been investigated spectroscopically in combination with quantum chemical calculations. The molecule DMAPPDE shows dual fluorescence corresponding to emission from the locally excited as well as charge transfer states in polar solvents. Large solvatochromic shift of emission band (Δν = 8504 cm−1), high excited state dipole moment (18 D), quantum chemically calculated potential energy curves by Density Functional Theory (DFT) method and HOMO–LUMO pictures support the occurrence of excited state ICT process. Variation of acceptor strength in this molecular system shows prominent effect on the spectroscopic and molecular properties like absorption and emission band maxima, Stokes’ shift, quantum yields, and dipole moment which are found to be controlled by the ICT process.

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Keywords
Intramolecular charge transfer; Stokes’ shift; 5-(4-Dimethylamino-phenyl)-penta-2,4-dienoic acid ethyl ester; Potential energy curve; Density Functional Theory; Acceptor group dependent ICT
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Excited state intramolecular charge transfer process in 5-(4-dimethylamino-phenyl)-penta-2,4-dienoic acid ethyl ester and effect of acceptor functional groups
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 261, 1 June 2013, Pages 31–40
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us