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Meta-substituted Ru(II) rigid rods for sensitization of TiO(2)

Abrahamsson, Maria; Meyer, G. J.; Persson, Petter LU ; Taratula, O. and Galoppini, E. (2009) In Journal of Photochemistry and Photobiology, A: Chemistry 206(2-3). p.155-163
Abstract (Swedish)
Abstract in Undetermined

Ruthenium polypyridyl rigid-rod compounds with phenylene-ethynelene (OPE) spacers and an isophthalic acid (Ipa) binding group were synthesized and characterized for sensitization of nanocrystalline TiO(2) (anatase) thin films. Density functional theory predicted that the most stable structure oriented the isophthalic group about 45 degrees from normal to the TiO(2) surface. Comparative experimental studies of meta- and para-isomers revealed small changes in the ground state absorption spectra and very similar excited state and redox properties. The excited state injection yields (inj = 0.15 +/- 0.03)into nanocrystalline TiO(2) and the subsequent charge recombination rates were found to be... (More)
Abstract in Undetermined

Ruthenium polypyridyl rigid-rod compounds with phenylene-ethynelene (OPE) spacers and an isophthalic acid (Ipa) binding group were synthesized and characterized for sensitization of nanocrystalline TiO(2) (anatase) thin films. Density functional theory predicted that the most stable structure oriented the isophthalic group about 45 degrees from normal to the TiO(2) surface. Comparative experimental studies of meta- and para-isomers revealed small changes in the ground state absorption spectra and very similar excited state and redox properties. The excited state injection yields (inj = 0.15 +/- 0.03)into nanocrystalline TiO(2) and the subsequent charge recombination rates were found to be insensitive to the isomer utilized. Meta-substitution enabled the synthesis of sensitizers with two Ru(II) sensitizers that displayed enhanced sunlight absorption relative to the monomeric compound. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ru compounds, MLCT excited states, Titanium dioxide, DFT calculations, Meta-substitution
in
Journal of Photochemistry and Photobiology, A: Chemistry
volume
206
issue
2-3
pages
155 - 163
publisher
Elsevier
external identifiers
  • wos:000269471200008
  • scopus:68649109172
ISSN
1873-2666
DOI
10.1016/j.jphotochem.2009.06.002
language
English
LU publication?
yes
id
5c9304ec-b8f2-452e-a3f3-12c5d2eb4cc7 (old id 1457579)
date added to LUP
2009-09-01 14:13:02
date last changed
2017-01-01 06:19:42
@article{5c9304ec-b8f2-452e-a3f3-12c5d2eb4cc7,
  abstract     = {<b>Abstract in Undetermined</b><br/><br>
Ruthenium polypyridyl rigid-rod compounds with phenylene-ethynelene (OPE) spacers and an isophthalic acid (Ipa) binding group were synthesized and characterized for sensitization of nanocrystalline TiO(2) (anatase) thin films. Density functional theory predicted that the most stable structure oriented the isophthalic group about 45 degrees from normal to the TiO(2) surface. Comparative experimental studies of meta- and para-isomers revealed small changes in the ground state absorption spectra and very similar excited state and redox properties. The excited state injection yields (inj = 0.15 +/- 0.03)into nanocrystalline TiO(2) and the subsequent charge recombination rates were found to be insensitive to the isomer utilized. Meta-substitution enabled the synthesis of sensitizers with two Ru(II) sensitizers that displayed enhanced sunlight absorption relative to the monomeric compound.},
  author       = {Abrahamsson, Maria and Meyer, G. J. and Persson, Petter and Taratula, O. and Galoppini, E.},
  issn         = {1873-2666},
  keyword      = {Ru compounds,MLCT excited states,Titanium dioxide,DFT calculations,Meta-substitution},
  language     = {eng},
  number       = {2-3},
  pages        = {155--163},
  publisher    = {Elsevier},
  series       = {Journal of Photochemistry and Photobiology, A: Chemistry},
  title        = {Meta-substituted Ru(II) rigid rods for sensitization of TiO(2)},
  url          = {http://dx.doi.org/10.1016/j.jphotochem.2009.06.002},
  volume       = {206},
  year         = {2009},
}