@article{18006,
  abstract     = {Understanding the role of intermolecular interaction on through-space charge transfer characteristics in π-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 π-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 π-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 π-stacked systems.},
  author       = {Batra, Arunabh and Kladnik, Gregor and Vázquez, Héctor and Meisner, Jeffrey S. and Floreano, Luca and Nuckolls, Colin and Cvetko, Dean and Morgante, Alberto and Venkataraman, Latha},
  issn         = {2041-1723},
  journal      = {Nature Communications},
  publisher    = {Springer Nature},
  title        = {{Quantifying through-space charge transfer dynamics in π-coupled molecular systems}},
  doi          = {10.1038/ncomms2083},
  volume       = {3},
  year         = {2012},
}