Effects of spacer-chain length on the photoelectrochemical responses of monolayer assemblies with ruthenium tris(2,2′-bipyridine) - viologen linked disulfides

Yasuhisa Koide, Nao Terasaki, Tsuyoshi Akiyama, Sunao Yamada

Research output: Contribution to journalArticle

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Abstract

Photochemical and photoelectrochemical properties of ruthenium tris(2,2′-bipyridine) (Ru2+)-viologen (V2+) linked disulfides [RuCnVC6S]2 (n (number of methylene groups) = 3, 7) with different spacer-chain lengths and Ru2+ disulfides [RuCmS]2 (m = 13, 17) were compared. The luminescence intensity in CH3CN was in the order of [RuC13S]2≈[RuC17S]2>[RuC7VC 6S]2≫[RuC3VC6S]2, implying efficient photoinduced electron-transfer between Ru2+ and V2+ moieties in the linked compounds. The monolayer assembly of the compound was fabricated on a gold surface. In the presence of triethanolamine, the anodic photocurrent was clearly observed from the RuCnVC6S/Au (n = 3, 7) electrode (gold electrode modified with [RuCnVC6S]2), and its intensity was substantially larger for n = 7 than for n = 3. Photocurrent action spectra for the RuCnVC6S/Au (n = 3, 7) electrodes were well correlated with the corresponding electronic absorption spectra in solution. The photocurrent from the RuC7VC6S/Au electrode was reduced more effectively by the coexistence of a water-soluble viologen as compared with the RuC3VC6S/Au electrode. The photocurrent from the RuCmS/Au (m = 13, 17) electrode was very small. The results suggest that the spacer-chain length between the Ru2+ and the V2+ moieties profoundly affects the Ru2+-sensitized photocurrent.

Original languageEnglish
Pages (from-to)223-227
Number of pages5
JournalThin Solid Films
Volume350
Issue number1
DOIs
Publication statusPublished - Aug 15 1999

Fingerprint

Viologens
Ruthenium
disulfides
Chain length
Disulfides
spacers
assemblies
ruthenium
Monolayers
Photocurrents
photocurrents
Electrodes
electrodes
Gold
gold
Triethanolamine
methylene
electronic spectra
Luminescence
Absorption spectra

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Cite this

Effects of spacer-chain length on the photoelectrochemical responses of monolayer assemblies with ruthenium tris(2,2′-bipyridine) - viologen linked disulfides. / Koide, Yasuhisa; Terasaki, Nao; Akiyama, Tsuyoshi; Yamada, Sunao.

In: Thin Solid Films, Vol. 350, No. 1, 15.08.1999, p. 223-227.

Research output: Contribution to journalArticle

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abstract = "Photochemical and photoelectrochemical properties of ruthenium tris(2,2′-bipyridine) (Ru2+)-viologen (V2+) linked disulfides [RuCnVC6S]2 (n (number of methylene groups) = 3, 7) with different spacer-chain lengths and Ru2+ disulfides [RuCmS]2 (m = 13, 17) were compared. The luminescence intensity in CH3CN was in the order of [RuC13S]2≈[RuC17S]2>[RuC7VC 6S]2≫[RuC3VC6S]2, implying efficient photoinduced electron-transfer between Ru2+ and V2+ moieties in the linked compounds. The monolayer assembly of the compound was fabricated on a gold surface. In the presence of triethanolamine, the anodic photocurrent was clearly observed from the RuCnVC6S/Au (n = 3, 7) electrode (gold electrode modified with [RuCnVC6S]2), and its intensity was substantially larger for n = 7 than for n = 3. Photocurrent action spectra for the RuCnVC6S/Au (n = 3, 7) electrodes were well correlated with the corresponding electronic absorption spectra in solution. The photocurrent from the RuC7VC6S/Au electrode was reduced more effectively by the coexistence of a water-soluble viologen as compared with the RuC3VC6S/Au electrode. The photocurrent from the RuCmS/Au (m = 13, 17) electrode was very small. The results suggest that the spacer-chain length between the Ru2+ and the V2+ moieties profoundly affects the Ru2+-sensitized photocurrent.",
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