The Importance of Nanoscopic Ordering on the Kinetics of Photoinduced Charge Transfer in Aggregated -Conjugated Hydrogen-Bonded Donor-A

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• 作者：Edwin H. A. Beckers ; Zhijian Chen ; Stefan C. J. Meskers ; Pascal Jonkheijm ; Albertus P. H. J. Schenning ; Xue-Qing Li ; Peter Osswald ; Frank W&uuml ; rthner ; René ; A. J. Janssen
• 刊名：Journal of Physical Chemistry B
• 出版年：2006
• 出版时间：August 31, 2006
• 年：2006
• 卷：110
• 期：34
• 页码：16967 - 16978
• 全文大小：632K
• 年卷期：v.110,no.34(August 31, 2006)
• ISSN：1520-5207

文摘

Aggregated complexes of diaminotriazine oligo(p-phenylene vinylene) (OPV) units hydrogen bonded todifferent complementary perylene bisimide (PERY) compounds have been investigated by means of absorption,circular dichroism, photoluminescence, and photoinduced absorption spectroscopy. These studies reveal thatin the aggregated state an ultrafast photoinduced charge separation occurs via an intermolecular pathway inthe J-type stack of hydrogen-bonded OPV-PERY arrays. The subsequent charge recombination reaction stronglydepends on small structural differences within the J-type geometry as revealed by comparison of stackedsupramolecular dimers, trimers, and covalently OPV-PERY linked systems. A coupled oscillator model isused to analyze absorption and circular dichroism spectra and to identify intermolecular arrangements thatare consistent with the experimental spectra and the charge-transfer kinetics.