title: Molecular wires--impact of π-conjugation and implementation of molecular bottlenecks.
abstract: In this review we highlight recent progress in the field of photochemically and thermally induced electron transport through molecular bridges as integrative parts of electron donor-bridge-acceptor conjugates. The major emphasis is hereby on the design and the modular composition of the bridges. To this end, we will demonstrate that control over attenuation factors and reorganization energies, on one hand, as well as electronic and electron-vibration couplings, on the other hand, enables tuning electron transport over distances as short as 3.5 Å and as large as 50 Å by up to nine orders of magnitude. In terms of electron transport, the maximum extreme is given by carbon-bridged oligo-p-phenylenevinylenes of different lengths, while a zinc tetraphenylporphyrin free base tetraphenylporphyrin dyad constitutes the minimum extreme.
authors.affiliation: Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany. dirk.guldi@fau.de.
authors.forename: C
authors.initials: C
authors.lastname: Schubert
authors.forename: J T
authors.initials: JT
authors.lastname: Margraf
authors.forename: T
authors.initials: T
authors.lastname: Clark
authors.forename: D M
authors.initials: DM
authors.lastname: Guldi
mesh_terms: D004579:Electron Transport; D004583:Electrons; D037741:Fullerenes / Q000737:chemistry; D008027:Light; D008665:Metalloporphyrins / Q000737:chemistry*; D011789:Quantum Theory
chemical_list: D037741:Fullerenes; D008665:Metalloporphyrins; C048955:zinc tetraphenylporphyrin