http://www.cnr.it/ontology/cnr/individuo/prodotto/ID188866

Quantifying through-space charge transfer dynamics in pi-coupled molecular systems (Articolo in rivista)

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Quantifying through-space charge transfer dynamics in pi-coupled molecular systems (Articolo in rivista) (literal)

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Batra A.a; Kladnik G.bc; Vázquez H.a; Meisner J.S.d; Floreano L.c; Nuckolls C.d; Cvetko D.bc; Morgante A.ce; Venkataraman L. a (2012)
Quantifying through-space charge transfer dynamics in pi-coupled molecular systems
in Nature communications; NATURE PUBLISHING GROUP,, LONDON (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Batra A.a; Kladnik G.bc; Vázquez H.a; Meisner J.S.d; Floreano L.c; Nuckolls C.d; Cvetko D.bc; Morgante A.ce; Venkataraman L. a (literal)

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a Department of Applied Physics and Applied Mathematics, Columbia University, 500 W 120th Street, New York 10027, NY, United States b Department of Physics, University of Ljubljana, Ljubljana, Slovenia c CNR-IOM Laboratorio Nazionale TASC, Basovizza SS-14, I-34012 Trieste, Italy d Department of Chemistry, Columbia University, New York 10027, NY, United States e Department of Physics, University of Trieste, Trieste, Italy (literal)

Titolo

Quantifying through-space charge transfer dynamics in pi-coupled molecular systems (literal)

Abstract

Understanding the role of intermolecular interaction on through-space charge transfer characteristics in ?-stacked molecular systems is central to the rational design of electronic materials. However, a quantitative study of charge transfer in such systems is often difficult because of poor control over molecular morphology. Here we use the core-hole clock implementation of resonant photoemission spectroscopy to study the femtosecond charge-transfer dynamics in cyclophanes, which consist of two precisely stacked ?-systems held together by aliphatic chains. We study two systems, [2,2]paracyclophane (22PCP) and [4,4]paracyclophane (44PCP), with inter-ring separations of 3.0 and 4.0 Å, respectively. We find that charge transfer across the ?-coupled system of 44PCP is 20 times slower than in 22PCP. We attribute this difference to the decreased inter-ring electronic coupling in 44PCP. These measurements illustrate the use of core-hole clock spectroscopy as a general tool for quantifying through-space coupling in ?-stacked systems. (literal)

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