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Jens Uhlig. Portrait.

Jens Uhlig

Senior lecturer

Jens Uhlig. Portrait.

FeII Hexa N-Heterocyclic Carbene Complex with a 528 ps Metal-To-Ligand Charge-Transfer Excited-State Lifetime

Author

  • Pavel Chábera
  • Kasper S. Kjaer
  • Om Prakash
  • Alireza Honarfar
  • Yizhu Liu
  • Lisa A. Fredin
  • Tobias C.B. Harlang
  • Sven Lidin
  • Jens Uhlig
  • Villy Sundström
  • Reiner Lomoth
  • Petter Persson
  • Kenneth Wärnmark
Show all

Summary, in English

The iron carbene complex [FeII(btz)3](PF6)2 (where btz = 3,3′-dimethyl-1,1′-bis(p-Tolyl)-4,4′-bis(1,2,3-Triazol-5-ylidene)) has been synthesized, isolated, and characterized as a low-spin ferrous complex. It exhibits strong metal-To-ligand charge transfer (MLCT) absorption bands throughout the visible spectrum, and excitation of these bands gives rise to a 3MLCT state with a 528 ps excited-state lifetime in CH3CN solution that is more than one order of magnitude longer compared with the MLCT lifetime of any previously reported FeII complex. The low potential of the [Fe(btz)3]3+/[Fe(btz)3]2+ redox couple makes the 3MLCT state of [FeII(btz)3]2+ a potent photoreductant that can be generated by light absorption throughout the visible spectrum. Taken together with our recent results on the [FeIII(btz)3]3+ form of this complex, these results show that the FeII and FeIII oxidation states of the same Fe(btz)3 complex feature long-lived MLCT and LMCT states, respectively, demonstrating the versatility of iron N-heterocyclic carbene complexes as promising light-harvesters for a broad range of oxidizing and reducing conditions.

Department/s

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

Publishing year

2018-02-01

Language

English

Pages

459-463

Publication/Series

Journal of Physical Chemistry Letters

Volume

9

Issue

3

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

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

Status

Published

ISBN/ISSN/Other

  • ISSN: 1948-7185