Annulation of Tetrathiafulvalene to the Bay Region of Perylenediimide: Fast Electron-Transfer Processes in Polar and Nonpolar Solvents

El-Khouly, Mohamed E.; Jaggi, Michael; Schmid, Belinda; Blum, Carmen; Liu, Shi-Xia; Decurtins, Silvio; Ohkubo, Kei; Fukuzumi, Shunichi (2011). Annulation of Tetrathiafulvalene to the Bay Region of Perylenediimide: Fast Electron-Transfer Processes in Polar and Nonpolar Solvents. Journal of physical chemistry. C, 115(16), pp. 8325-8334. Washington, D.C.: American Chemical Society 10.1021/jp2007667

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A tetrathiafulvalene donor has been annulated to the bay region of perylenediimide through a 1H-benzo-[d]pyrrolo[1,2-a]imidazol-1-one spacer affording an extended pi-conjugated molecular dyad (TTF-PDI). To gain insight into its ground- and excited-state electronic properties, the reference compound Ph-PDI has been prepared via a direct Schiff-base condensation of N,N'-bis(1-octylnonyl) benzoperylene-1',2':3,4:9,10-hexacarboxylic-1',2'-anhydride-3,4:9,10-bis (imide) with benzene-1,2-diamine. Both the experimental and the computational (DFT) results indicate that TTF-PDI exhibits significant intramolecular electronic interactions giving rise to an efficient photoinduced charge-separation process. Free-energy calculations verify that the process from TTF to the singlet-excited state of PDI is exothermic in both polar and nonpolar solvents. Fast adiabatic electron-transfer processes of a compactly fused, pi-conjugated TTF-PDI dyad in benzonitrile, 2-methyltetrahydrofuran, anisole and toluene were observed by femtosecond transient absorption spectral measurements. The lifetimes of radical-ion pairs slightly increase with decreasing the solvent polarities, suggesting that the charge-recombination occurs in the Marcus inverted region. By utilizing the nanosecond transient absorption technique, the intermolecular electron-transfer process in a mixture of has been observed via the triplet excited PDI for the first time.

Item Type:	Journal Article (Original Article)
Division/Institute:	08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)
UniBE Contributor:	Jaggi, Michael, Blum, Carmen, Liu, Shi-Xia, Decurtins, Silvio
ISSN:	1932-7447
Publisher:	American Chemical Society
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:26
Last Modified:	05 Dec 2022 14:08
Publisher DOI:	10.1021/jp2007667
Web of Science ID:	000289697400062
URI:	https://boris.unibe.ch/id/eprint/9549 (FactScience: 215301)