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Ultrafast singlet energy transfer competes with intersystem crossing in a multi-center transition metal polypyridine complex

Andersson, Johan LU ; Puntoriero, F; Serroni, S; Yartsev, Arkady LU ; Pascher, Torbjörn LU ; Polivka, Tomas LU ; Campagna, S and Sundström, Villy LU (2004) In Chemical Physics Letters 386(4-6). p.336-341
Abstract
Transition metal polypyridine complexes are finding widespread applications within many areas of chemistry. For their light-induced processes, the generally accepted picture is that all function emanates from triplet states because the singlet states initially prepared by light absorption are depopulated via intersystem crossing on the 100-fs time scale, before they are significantly involved in chemical reactions. Here we show that this is not always true. With ultrafast spectroscopy applied to a (ruthenium)(3)-osmium complex we show that transition metal polypyridine complexes can be designed where energy transfer between excited singlet states located on different metal centers efficiently competes with intersystem crossing, thus... (More)
Transition metal polypyridine complexes are finding widespread applications within many areas of chemistry. For their light-induced processes, the generally accepted picture is that all function emanates from triplet states because the singlet states initially prepared by light absorption are depopulated via intersystem crossing on the 100-fs time scale, before they are significantly involved in chemical reactions. Here we show that this is not always true. With ultrafast spectroscopy applied to a (ruthenium)(3)-osmium complex we show that transition metal polypyridine complexes can be designed where energy transfer between excited singlet states located on different metal centers efficiently competes with intersystem crossing, thus decreasing population of the lower-lying triplet states and concomitant energy loss. (C) 2004 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemical Physics Letters
volume
386
issue
4-6
pages
336 - 341
publisher
Elsevier
external identifiers
  • wos:000220124700021
  • scopus:1442360836
ISSN
0009-2614
DOI
10.1016/j.cplett.2004.01.081
language
English
LU publication?
yes
id
ec309551-ed3d-46f5-98b0-c829a40f1226 (old id 139111)
date added to LUP
2007-07-03 09:45:50
date last changed
2017-12-10 04:37:21
@article{ec309551-ed3d-46f5-98b0-c829a40f1226,
  abstract     = {Transition metal polypyridine complexes are finding widespread applications within many areas of chemistry. For their light-induced processes, the generally accepted picture is that all function emanates from triplet states because the singlet states initially prepared by light absorption are depopulated via intersystem crossing on the 100-fs time scale, before they are significantly involved in chemical reactions. Here we show that this is not always true. With ultrafast spectroscopy applied to a (ruthenium)(3)-osmium complex we show that transition metal polypyridine complexes can be designed where energy transfer between excited singlet states located on different metal centers efficiently competes with intersystem crossing, thus decreasing population of the lower-lying triplet states and concomitant energy loss. (C) 2004 Elsevier B.V. All rights reserved.},
  author       = {Andersson, Johan and Puntoriero, F and Serroni, S and Yartsev, Arkady and Pascher, Torbjörn and Polivka, Tomas and Campagna, S and Sundström, Villy},
  issn         = {0009-2614},
  language     = {eng},
  number       = {4-6},
  pages        = {336--341},
  publisher    = {Elsevier},
  series       = {Chemical Physics Letters},
  title        = {Ultrafast singlet energy transfer competes with intersystem crossing in a multi-center transition metal polypyridine complex},
  url          = {http://dx.doi.org/10.1016/j.cplett.2004.01.081},
  volume       = {386},
  year         = {2004},
}