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New paradigm of transition metal polypyridine complex photochemistry

Andersson, Johan LU ; Puntoriero, F; Serroni, S; Yartsev, Arkady LU ; Pascher, Torbjörn LU ; Polivka, Tomas LU ; Campagna, S and Sundström, Villy LU (2004) In Faraday Discussions 127. p.295-305
Abstract
Using polarization sensitive ultrafast transient absorption spectroscopy we have studied energy transfer and excited state relaxation pathways in a tetranuclear transition metal [( osmium)( ruthenium)(3)] polypyridine complex. Contrary to the generally accepted picture of transition metal complex photochemistry we find that ultrafast energy transfer ( less than or equal to 60 fs) occurs from the excited singlet MLCT state of the peripheral Ru-chromophores to the central Os-core, in efficient competition with intersystem crossing. Energy transfer between relaxed triplet MLCT states is more than an order of magnitude slower ( 600 fs).
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Faraday Discussions
volume
127
pages
295 - 305
publisher
Royal Society of Chemistry
external identifiers
  • wos:000223139400018
  • pmid:15471351
  • scopus:5644226412
ISSN
1364-5498
DOI
10.1039/b316160a
language
English
LU publication?
yes
id
5f82bcdf-eb8f-47b7-bf53-672c2b40575a (old id 138961)
date added to LUP
2007-07-03 09:52:30
date last changed
2017-10-29 03:37:15
@article{5f82bcdf-eb8f-47b7-bf53-672c2b40575a,
  abstract     = {Using polarization sensitive ultrafast transient absorption spectroscopy we have studied energy transfer and excited state relaxation pathways in a tetranuclear transition metal [( osmium)( ruthenium)(3)] polypyridine complex. Contrary to the generally accepted picture of transition metal complex photochemistry we find that ultrafast energy transfer ( less than or equal to 60 fs) occurs from the excited singlet MLCT state of the peripheral Ru-chromophores to the central Os-core, in efficient competition with intersystem crossing. Energy transfer between relaxed triplet MLCT states is more than an order of magnitude slower ( 600 fs).},
  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         = {1364-5498},
  language     = {eng},
  pages        = {295--305},
  publisher    = {Royal Society of Chemistry},
  series       = {Faraday Discussions},
  title        = {New paradigm of transition metal polypyridine complex photochemistry},
  url          = {http://dx.doi.org/10.1039/b316160a},
  volume       = {127},
  year         = {2004},
}