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Jens Uhlig. Portrait.

Jens Uhlig

Senior lecturer

Jens Uhlig. Portrait.

Luminescence and reactivity of a charge-transfer excited iron complex with nanosecond lifetime

Author

  • Kasper Skov Kjær
  • Nidhi Kaul
  • Om Prakash
  • Pavel Chábera
  • Nils W. Rosemann
  • Alireza Honarfar
  • Olga Gordivska
  • Lisa A. Fredin
  • Karl-Erik Bergquist
  • Lennart Häggström
  • Tore Ericsson
  • Linnea Lindh
  • Arkady Yartsev
  • Stenbjörn Styring
  • Ping Huang
  • Jens Uhlig
  • Jesper Bendix
  • Daniel Strand
  • Villy Sundström
  • Petter Persson
  • Reiner Lomoth
  • Kenneth Wärnmark
Show all

Summary, in English

Iron’s abundance and rich coordination chemistry are potentially appealing features for photochemical applications. However, the photoexcitable charge-transfer (CT) states of most Fe complexes are limited by picosecond or sub-picosecond deactivation through low-lying metal centered (MC) states, resulting in inefficient electron transfer reactivity and complete lack of photoluminescence. Here we show that octahedral coordination of Fe(III) by two mono-anionic facial tris-carbene ligands can suppress such deactivation dramatically. The resulting complex [Fe(phtmeimb)2]+, where phtmeimb is [phenyl(tris(3-methylimidazol-1-ylidene))borate]-, exhibits strong, visible, room temperature photoluminescence with a 2.0 ns lifetime and 2% quantum yield via spin-allowed transition from a ligand-to-metal charge-transfer (2 LMCT) state to the ground state (2 GS). Reductive and oxidative electron transfer reactions were observed for the2 LMCT state of [Fe(phtmeimb)2]+ in bimolecular quenching studies with methylviologen and diphenylamine.

Department/s

  • Chemical Physics
  • Centre for Analysis and Synthesis
  • Computational Chemistry
  • eSSENCE: The e-Science Collaboration
  • NanoLund: Centre for Nanoscience

Publishing year

2019

Language

English

Pages

249-253

Publication/Series

Science

Volume

363

Issue

6424

Document type

Journal article

Publisher

American Association for the Advancement of Science (AAAS)

Topic

  • Theoretical Chemistry (including Computational Chemistry)
  • Physical Chemistry (including Surface- and Colloid Chemistry)
  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0036-8075