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Femtosecond coherent wavepacket motion in an ultrafast electron transfer system composed of naphthacene derivative in an electron donating solvent

Paper ID Volume ID Publish Year Pages File Format Full-Text
26468 43954 2015 8 PDF Available
Title
Femtosecond coherent wavepacket motion in an ultrafast electron transfer system composed of naphthacene derivative in an electron donating solvent
Abstract

•Femtosecond transient absorption measurements were carried out for naphthacene derivative.•In an inert solvent, 1-chloronaphthalene, both the intensity and the wavelength of the stimulated emission (SE) was modulated by the wavepacket motion.•In an electron donating solvent, N,N-dimethylaniline, the SE intensity was quickly diminished and only the wavelength of SE was modulated.

Coherent wavepacket motions of 5,12-bis(phenylethynyl)-naphthacene (BPEN) in an inert solvent, 1-chloronaphthalene (1-CN), and in an electron donating solvent, N,N-dimethylaniline (DMA) were compared by femtosecond white-light supercontinuum transient absorption (WC-TA) spectroscopy. In the inert solvent, 1-CN, both the intensity and the wavelength of the stimulated emission (SE) was modulated by the wavepacket motion, i.e., the maximum of the SE spectrum exhibited a repetitive movement between longer and shorter wavelengths (frequency-modulation) and the SE intensity was stronger at shorter wavelengths (amplitude-modulation). While in the electron donating solvent, DMA, the intensity was quickly diminished and only the frequency-modulation remained. The ultrafast electron transfer (ET) occurring in a few picosecond range rapidly diminishes the population in the vicinity of the Franck–Condon region and the wavepacket motion was no longer capable of recovering the SE intensity.

Keywords
Electron transfer; Ultrafast spectroscopy; Coherent wavepacket motion; Dynamic Stokes shift
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Femtosecond coherent wavepacket motion in an ultrafast electron transfer system composed of naphthacene derivative in an electron donating solvent
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 313, 1 December 2015, Pages 79–86
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
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Any Questions? feel free to contact us