Photodriven charge separation and transport in self-assembled zinc tetrabenzotetraphenylporphyrin and perylenediimide charge conduits

Vladimir V. Roznyatovskiy, Raanan Carmieli, Scott M. Dyar, Kristen E. Brown, Michael R. Wasielewski*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Zinc tetrabenzotetraphenyl porphyrin (ZnTBTPP) covalently attached to four perylenediimide (PDI) acceptors self-assembles into a π-stacked, segregated columnar structure, as indicated by small- and wide-angle X-ray scattering. Photoexcitation of ZnTBTPP rapidly produces a long-lived electron-hole pair having a 26 Å average separation distance, which is much longer than if the pair is confined within the covalent monomer. This implies that the charges are mobile within their respective segregated ZnTBTPP and PDI charge conduits. Zinc tetrabenzotetraphenylporphyrin (ZnTBTPP) covalently attached to four perylenediimide (PDI) acceptors self-assembles into a π-stacked, segregated columnar structure. Photoexcitation of ZnTBTPP rapidly produces a long-lived electron-hole pair with a 26 Å average separation distance, which is much longer than if the pair is confined within the covalent monomer. The charges are thus mobile within their respective segregated ZnTBTPP and PDI charge conduits.

Original languageEnglish (US)
Pages (from-to)3457-3461
Number of pages5
JournalAngewandte Chemie - International Edition
Volume53
Issue number13
DOIs
StatePublished - Mar 24 2014

Keywords

  • charge separation
  • charge transport
  • donor-acceptor systems
  • organic photovoltaics
  • radical pairs

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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