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Electrochemistry and Photocurrents of the Tris(bipyridine)ruthenium(II) and Methyl Viologen Cations Immobilized in Carrageenan Hydrogel

Publication ,  Journal Article
Rillema, DP; Edwards, AK; Perine, SC; Crumbliss, AL
Published in: Inorganic Chemistry
November 1, 1991

A procedure for immobilization of both a photochromophore, tris(2,2′-bipyridine)ruthenium(II) (Ru(bpy)32+), and a quencher, methyl viologen (MV2+), within a carrageenan hydrogel matrix at an electrode surface is described. Ru(bpy)32+ and MV2+ exhibited diffusion coefficients that ranged from 10-7 to 10-6 cm2/s in the hydrogel, which represents an improvement over other immobilization matrices. Photolysis of the resulting hydrogel surface modified electrodes gave rise to a significant photocurrent which depended on the concentrations of Ru(bpy)32+, MV2+, and triethanolamine and resulted in a maximum value of 12 μA/cm2 after the hydrogel was cured with a solution containing 5 mM Ru(bpy)32+ and 50 mM MV2+. The photocurrent was the result of reoxidation of MV+ at the electrode surface following reduction of MV2+ by photoexcited Ru(bpy)32+. The quenching rate constant of Ru(bpy)32+* by MV2+ in the hydrogel was 4.2 X 108 M-1 s-1. The photocurrent action spectrum was consistent with Ru(bpy)32+ acting as the photochromophore. Offsetting the potential of the hydrogel electrode verified the role of the MV2+/+ redox couple as the source of the current. © 1991, American Chemical Society. All rights reserved.

Duke Scholars

Published In

Inorganic Chemistry

DOI

EISSN

1520-510X

ISSN

0020-1669

Publication Date

November 1, 1991

Volume

30

Issue

23

Start / End Page

4421 / 4425

Related Subject Headings

  • Inorganic & Nuclear Chemistry
  • 3403 Macromolecular and materials chemistry
  • 3402 Inorganic chemistry
  • 0399 Other Chemical Sciences
  • 0306 Physical Chemistry (incl. Structural)
  • 0302 Inorganic Chemistry
 

Citation

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MLA
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Rillema, D. P., Edwards, A. K., Perine, S. C., & Crumbliss, A. L. (1991). Electrochemistry and Photocurrents of the Tris(bipyridine)ruthenium(II) and Methyl Viologen Cations Immobilized in Carrageenan Hydrogel. Inorganic Chemistry, 30(23), 4421–4425. https://doi.org/10.1021/ic00023a026
Rillema, D. P., A. K. Edwards, S. C. Perine, and A. L. Crumbliss. “Electrochemistry and Photocurrents of the Tris(bipyridine)ruthenium(II) and Methyl Viologen Cations Immobilized in Carrageenan Hydrogel.” Inorganic Chemistry 30, no. 23 (November 1, 1991): 4421–25. https://doi.org/10.1021/ic00023a026.
Rillema DP, Edwards AK, Perine SC, Crumbliss AL. Electrochemistry and Photocurrents of the Tris(bipyridine)ruthenium(II) and Methyl Viologen Cations Immobilized in Carrageenan Hydrogel. Inorganic Chemistry. 1991 Nov 1;30(23):4421–5.
Rillema, D. P., et al. “Electrochemistry and Photocurrents of the Tris(bipyridine)ruthenium(II) and Methyl Viologen Cations Immobilized in Carrageenan Hydrogel.” Inorganic Chemistry, vol. 30, no. 23, Nov. 1991, pp. 4421–25. Scopus, doi:10.1021/ic00023a026.
Rillema DP, Edwards AK, Perine SC, Crumbliss AL. Electrochemistry and Photocurrents of the Tris(bipyridine)ruthenium(II) and Methyl Viologen Cations Immobilized in Carrageenan Hydrogel. Inorganic Chemistry. 1991 Nov 1;30(23):4421–4425.
Journal cover image

Published In

Inorganic Chemistry

DOI

EISSN

1520-510X

ISSN

0020-1669

Publication Date

November 1, 1991

Volume

30

Issue

23

Start / End Page

4421 / 4425

Related Subject Headings

  • Inorganic & Nuclear Chemistry
  • 3403 Macromolecular and materials chemistry
  • 3402 Inorganic chemistry
  • 0399 Other Chemical Sciences
  • 0306 Physical Chemistry (incl. Structural)
  • 0302 Inorganic Chemistry