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Synthesis and electron transfer studies of ruthenium-terpyridine-based dyads attached to nanostructured TiO2

Wolpher, Henriette; Sinha, Subrata LU ; Pan, Jingxi LU ; Johansson, Anh; Lundqvist, Maria J.; Persson, Petter; Lomoth, Reiner; Bergquist, Jonas; Sun, Licheng and Sundström, Villy LU , et al. (2007) In Inorganic Chemistry 46(3). p.638-651
Abstract
A series of bis(terpyridine)Ru-II complexes have been prepared, where one of the terpyridines is functionalized in the 4'-position by a phosphonic or carboxylic acid group for attachment to TiO2. The other is functionalized, also in the 4'-position, by a potential electron donor. In complexes 1a, 3a, and 4a,b, this donor is tyrosine or hydrogen-bonded tyrosine, while in 2a it is carotenoic amide. The synthesis and photophysical properties of the complexes are discussed. On irradiation with visible light, the formation of a long-lived charge-separated state was anticipated, via primary electron ejection into the TiO2, followed by secondary electron transfer from the donor to the photogenerated Ru-III. However, such a charge-separated state... (More)
A series of bis(terpyridine)Ru-II complexes have been prepared, where one of the terpyridines is functionalized in the 4'-position by a phosphonic or carboxylic acid group for attachment to TiO2. The other is functionalized, also in the 4'-position, by a potential electron donor. In complexes 1a, 3a, and 4a,b, this donor is tyrosine or hydrogen-bonded tyrosine, while in 2a it is carotenoic amide. The synthesis and photophysical properties of the complexes are discussed. On irradiation with visible light, the formation of a long-lived charge-separated state was anticipated, via primary electron ejection into the TiO2, followed by secondary electron transfer from the donor to the photogenerated Ru-III. However, such a charge-separated state could be observed with certainty only with complex 2a. To explain the result, quantum chemical calculations were performed on the different types of complexes. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
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Inorganic Chemistry
volume
46
issue
3
pages
638 - 651
publisher
The American Chemical Society
external identifiers
  • wos:000243789400009
  • scopus:33847132729
ISSN
1520-510X
DOI
10.1021/ic060858a
language
English
LU publication?
yes
id
957ac550-cd32-4195-aed4-2f6af8c2c3d0 (old id 676618)
date added to LUP
2007-12-19 11:49:37
date last changed
2017-10-01 03:35:24
@article{957ac550-cd32-4195-aed4-2f6af8c2c3d0,
  abstract     = {A series of bis(terpyridine)Ru-II complexes have been prepared, where one of the terpyridines is functionalized in the 4'-position by a phosphonic or carboxylic acid group for attachment to TiO2. The other is functionalized, also in the 4'-position, by a potential electron donor. In complexes 1a, 3a, and 4a,b, this donor is tyrosine or hydrogen-bonded tyrosine, while in 2a it is carotenoic amide. The synthesis and photophysical properties of the complexes are discussed. On irradiation with visible light, the formation of a long-lived charge-separated state was anticipated, via primary electron ejection into the TiO2, followed by secondary electron transfer from the donor to the photogenerated Ru-III. However, such a charge-separated state could be observed with certainty only with complex 2a. To explain the result, quantum chemical calculations were performed on the different types of complexes.},
  author       = {Wolpher, Henriette and Sinha, Subrata and Pan, Jingxi and Johansson, Anh and Lundqvist, Maria J. and Persson, Petter and Lomoth, Reiner and Bergquist, Jonas and Sun, Licheng and Sundström, Villy and Akermark, Bjorn and Polivka, Tomas},
  issn         = {1520-510X},
  language     = {eng},
  number       = {3},
  pages        = {638--651},
  publisher    = {The American Chemical Society},
  series       = {Inorganic Chemistry},
  title        = {Synthesis and electron transfer studies of ruthenium-terpyridine-based dyads attached to nanostructured TiO2},
  url          = {http://dx.doi.org/10.1021/ic060858a},
  volume       = {46},
  year         = {2007},
}