plays a decisive role in governing excited-state interactions in the corresponding electrondonor-acceptorconjugates (5, 10, 13, and 16). To this end, 5, in which the photo- and electroactive constituents are bridged by just one aromatic ring, displays--exclusively and independent of the concentration (10(-6) to 10(-4) M)--efficient intramolecular electrontransfer events on the basis of a "through-bond"
<i>p</i>-Phenyleneethynylene Molecular Wires: Influence of Structure on Photoinduced Electron-Transfer Properties
作者:Mateusz Wielopolski、Carmen Atienza、Timothy Clark、Dirk M. Guldi、Nazario Martín
DOI:10.1002/chem.200800159
日期:2008.7.18
tetrathiafulvalene (exTTF) as electron donor and fullerene (C60) as electron acceptor has been prepared by following a convergent synthesis. The key reaction in these approaches is the bromo-iodo selectivity of the Hagihara-Sonogashira reaction and the deprotecting of acetylenes with different silyl groups to afford the corresponding donor-acceptor conjugates in moderate yields. The electronic interactions between the
Electron transfer through exTTF bridges in electron donor–acceptor conjugates
作者:Beatriz M. Illescas、José Santos、Mateusz Wielopolski、Carmen M. Atienza、Nazario Martín、Dirk M. Guldi
DOI:10.1039/b911028c
日期:——
Rigid and soluble electron donor-acceptor conjugates combining exTTF and/or TTF as donors and C60 as acceptor have been synthesized; fluorescence and transient absorption measurements confirm the generation of charge-separated radical-ion pairs with lifetimes in the micros timescale.
Tuning electron transfer through p-phenyleneethynylene molecular wires
作者:Carmen Atienza、Nazario Martín、Mateusz Wielopolski、Naomi Haworth、Timothy Clark、Dirk M. Guldi
DOI:10.1039/b603149h
日期:——
Weak wire-like behavior-with a damping factor (beta) of 0.2 +/- 0.05 A(-1)--has been found in a series of C60-wire-exTTF systems (i.e., p-phenyleneethynylene): these results contrast with previous observations involving p-phenylenevinylene systems.