Nonlinear Optical Pulse Suppression via Ultrafast Photoinduced Electron Transfer in an Aggregated Perylene Diimide/Oligothiophene Molecular Triad

Nonlinear Optical Pulse Suppression via Ultrafast Photoinduced Electron Transfer in an Aggregated Perylene Diimide/Oligothiophene Molecular Triad

A donor–acceptor–donor triad material in which two quinquethiophene moieties are attached via nonconjugated, flexible bridges to the 1,7-positions (80% isomer) and 1,6-positions (20% isomer) of a perylene diimide (PDI-5T) has been synthesized, and its nonlinear suppression of nanosecond laser pulses...

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Veröffentlicht in:The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2014-01, Vol.118 (1), p.110-121
Hauptverfasser: Sartin, Matthew M, Huang, Chun, Marshall, Ariel S, Makarov, Nikolay, Barlow, Stephen, Marder, Seth R, Perry, Joseph W
Format: Artikel
Sprache:eng
Schlagworte:
Charge
Diimide
Isomers
Nonlinearity
Radicals
Separation
Spectroscopy
Wavelengths
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Zusammenfassung:A donor–acceptor–donor triad material in which two quinquethiophene moieties are attached via nonconjugated, flexible bridges to the 1,7-positions (80% isomer) and 1,6-positions (20% isomer) of a perylene diimide (PDI-5T) has been synthesized, and its nonlinear suppression of nanosecond laser pulses in the 680–750 nm range has been studied. The kinetics of the photoinduced charge separation processes have been characterized using femtosecond transient pump–probe spectroscopy. Excitation of either the quinquethiophene donor or perylene diimide acceptor leads to ultrafast (
ISSN:1089-5639
1520-5215
DOI:10.1021/jp409065b