Photoinduced electron transfer in perylene-TiO2 nanoassemblies

Manuel J. Llansola-Portoles, Jesse J. Bergkamp, John Tomlin, Thomas A Moore, Gerdenis Kodis, Ana L Moore, Gonzalo Cosa, Rodrigo E. Palacios

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The photosensitization effect of three perylene dye derivatives on titanium dioxide nanoparticles (TiO2 NPs) has been investigated. The dyes used, 1,7-dibromoperylene-3,4,9,10-tetracarboxy dianhydride (1), 1,7-dipyrrolidinylperylene-3,4,9,10-tetracarboxy dianhydride (2) and 1,7-bis(4-tert-butylphenyloxy)perylene-3,4,9,10-tetracarboxy dianhydride (3) have in common bisanhydride groups that convert into TiO2 binding groups upon hydrolysis. The different substituents on the bay position of the dyes enable tuning of their redox properties to yield significantly different driving forces for photoinduced electron transfer (PeT). Recently developed TiO2 NPs having a small average size and a narrow distribution (4 ± 1 nm) are used in this work to prepare the dye-TiO 2 systems under study. Whereas successful sensitization was obtained with 1 and 2 as evidenced by steady-state spectral shifts and transient absorption results, no evidence for the attachment of 3 to TiO2 was observed. The comparison of the rates of PeT (kPeT) for 1- and 2-TiO2 systems studied in this work with those obtained for previously reported analogous systems, having TiO2 NPs covered by a surfactant layer (Hernandez et al. [2012] J. Phys. Chem. B., 117, 4568-4581), indicates that kPeT for the former systems is slower than that for the later. These results are interpreted in terms of the different energy values of the conduction band edge in each system.

Original languageEnglish
Pages (from-to)1375-1382
Number of pages8
JournalPhotochemistry and Photobiology
Volume89
Issue number6
DOIs
Publication statusPublished - Nov 2013

Fingerprint

Perylene
electron transfer
Coloring Agents
dyes
Electrons
Photosensitivity Disorders
Surface-Active Agents
Nanoparticles
Oxidation-Reduction
Hydrolysis
Conduction bands
titanium oxides
attachment
hydrolysis
conduction bands
Tuning
surfactants
tuning
Derivatives
nanoparticles

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Biochemistry
  • Medicine(all)

Cite this

Llansola-Portoles, M. J., Bergkamp, J. J., Tomlin, J., Moore, T. A., Kodis, G., Moore, A. L., ... Palacios, R. E. (2013). Photoinduced electron transfer in perylene-TiO2 nanoassemblies. Photochemistry and Photobiology, 89(6), 1375-1382. https://doi.org/10.1111/php.12108

Photoinduced electron transfer in perylene-TiO2 nanoassemblies. / Llansola-Portoles, Manuel J.; Bergkamp, Jesse J.; Tomlin, John; Moore, Thomas A; Kodis, Gerdenis; Moore, Ana L; Cosa, Gonzalo; Palacios, Rodrigo E.

In: Photochemistry and Photobiology, Vol. 89, No. 6, 11.2013, p. 1375-1382.

Research output: Contribution to journalArticle

Llansola-Portoles, MJ, Bergkamp, JJ, Tomlin, J, Moore, TA, Kodis, G, Moore, AL, Cosa, G & Palacios, RE 2013, 'Photoinduced electron transfer in perylene-TiO2 nanoassemblies', Photochemistry and Photobiology, vol. 89, no. 6, pp. 1375-1382. https://doi.org/10.1111/php.12108
Llansola-Portoles, Manuel J. ; Bergkamp, Jesse J. ; Tomlin, John ; Moore, Thomas A ; Kodis, Gerdenis ; Moore, Ana L ; Cosa, Gonzalo ; Palacios, Rodrigo E. / Photoinduced electron transfer in perylene-TiO2 nanoassemblies. In: Photochemistry and Photobiology. 2013 ; Vol. 89, No. 6. pp. 1375-1382.
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