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Microsecond Photoluminescence and Photoreactivity of a Metal-Centered Excited State in a Hexacarbene-Co(III) Complex

Kaufhold, Simon LU ; Rosemann, Nils W. LU ; Chábera, Pavel LU ; Lindh, Linnea LU ; Bolanõ Losada, Iria LU ; Uhlig, Jens LU ; Pascher, Torbjörn LU ; Strand, Daniel LU ; Wärnmark, Kenneth LU and Yartsev, Arkady LU , et al. (2021) In Journal of the American Chemical Society p.1307-1312
Abstract

The photofunctionality of the cobalt-hexacarbene complex [Co(III)(PhB(MeIm)3)2]+ (PhB(MeIm)3 = tris(3-methylimidazolin-2-ylidene)(phenyl)borate) has been investigated by time-resolved optical spectroscopy. The complex displays a weak (φ ∼10-4) but remarkably long-lived (τ ∼1 μs) orange photoluminescence at 690 nm in solution at room temperature following excitation with wavelengths shorter than 350 nm. The strongly red-shifted emission is assigned from the spectroscopic evidence and quantum chemical calculations as a rare case of luminescence from a metal-centered state in a 3d6 complex. Singlet oxygen quenching supports the assignment of the emitting state as a triplet metal-centered state and underlines its capability of driving... (More)

The photofunctionality of the cobalt-hexacarbene complex [Co(III)(PhB(MeIm)3)2]+ (PhB(MeIm)3 = tris(3-methylimidazolin-2-ylidene)(phenyl)borate) has been investigated by time-resolved optical spectroscopy. The complex displays a weak (φ ∼10-4) but remarkably long-lived (τ ∼1 μs) orange photoluminescence at 690 nm in solution at room temperature following excitation with wavelengths shorter than 350 nm. The strongly red-shifted emission is assigned from the spectroscopic evidence and quantum chemical calculations as a rare case of luminescence from a metal-centered state in a 3d6 complex. Singlet oxygen quenching supports the assignment of the emitting state as a triplet metal-centered state and underlines its capability of driving excitation energy transfer processes.

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publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the American Chemical Society
pages
1307 - 1312
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:33449685
  • scopus:85099941413
ISSN
0002-7863
DOI
10.1021/jacs.0c12151
language
English
LU publication?
yes
id
c20734f4-051d-4637-bcba-6c3f42559e98
date added to LUP
2021-02-08 10:49:25
date last changed
2021-03-24 03:30:30
@article{c20734f4-051d-4637-bcba-6c3f42559e98,
  abstract     = {<p>The photofunctionality of the cobalt-hexacarbene complex [Co(III)(PhB(MeIm)3)2]+ (PhB(MeIm)3 = tris(3-methylimidazolin-2-ylidene)(phenyl)borate) has been investigated by time-resolved optical spectroscopy. The complex displays a weak (φ ∼10-4) but remarkably long-lived (τ ∼1 μs) orange photoluminescence at 690 nm in solution at room temperature following excitation with wavelengths shorter than 350 nm. The strongly red-shifted emission is assigned from the spectroscopic evidence and quantum chemical calculations as a rare case of luminescence from a metal-centered state in a 3d6 complex. Singlet oxygen quenching supports the assignment of the emitting state as a triplet metal-centered state and underlines its capability of driving excitation energy transfer processes. </p>},
  author       = {Kaufhold, Simon and Rosemann, Nils W. and Chábera, Pavel and Lindh, Linnea and Bolanõ Losada, Iria and Uhlig, Jens and Pascher, Torbjörn and Strand, Daniel and Wärnmark, Kenneth and Yartsev, Arkady and Persson, Petter},
  issn         = {0002-7863},
  language     = {eng},
  pages        = {1307--1312},
  publisher    = {The American Chemical Society (ACS)},
  series       = {Journal of the American Chemical Society},
  title        = {Microsecond Photoluminescence and Photoreactivity of a Metal-Centered Excited State in a Hexacarbene-Co(III) Complex},
  url          = {http://dx.doi.org/10.1021/jacs.0c12151},
  doi          = {10.1021/jacs.0c12151},
  year         = {2021},
}