Photoelectrochemical oxidation of a turn-on fluorescent probe mediated by a surface MnII catalyst covalently attached to TiO2 nanoparticles

Alec C. Durrell, Gonghu Li, Matthieu Koepf, Karin J. Young, Christian F A Negre, Laura J. Allen, William R. McNamara, Hee Eun Song, Victor S. Batista, Robert H. Crabtree, Gary W Brudvig

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A manganese complex covalently attached to a TiO2 electrode via a light-absorbing organic linker (L) was used in the photooxidation of 20,70-dihydrodichlorofluorescein (H2DCF). Significant and sustained photocurrent was observed upon visible-light illumination of the fully assembled anode in the presence of the substrate. The two-electron, two-proton oxidation of H2DCF yields the fluorescent compound, 20,70- dichlorofluorescein (DCF). Our studies suggest that the MnII-L-TiO2 architecture is an effective photoanode for multielectron chemistry, as production of DCF under visible-light illumination exceeds yields observed for bare TiO2 as well as ZnII-L-TiO2 anodes. The turn-on fluorescent behavior of H2DCF upon oxidation makes it an excellent substrate for the study of new photoanodes. The high fluorescence quantum yield of DCF allows for nanomolar sensitivity and real-time monitoring of substrate oxidation.

Original languageEnglish
Pages (from-to)37-44
Number of pages8
JournalJournal of Catalysis
Volume310
DOIs
Publication statusPublished - Feb 1 2014

Fingerprint

Fluorescent Dyes
Nanoparticles
catalysts
Oxidation
nanoparticles
oxidation
Catalysts
probes
Anodes
anodes
Substrates
Lighting
illumination
Photooxidation
photooxidation
Quantum yield
Manganese
Photocurrents
photocurrents
Protons

Keywords

  • Dye-sensitized photoelectrochemical cell
  • Photoanode
  • Turn-on fluorescence

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

Photoelectrochemical oxidation of a turn-on fluorescent probe mediated by a surface MnII catalyst covalently attached to TiO2 nanoparticles. / Durrell, Alec C.; Li, Gonghu; Koepf, Matthieu; Young, Karin J.; Negre, Christian F A; Allen, Laura J.; McNamara, William R.; Song, Hee Eun; Batista, Victor S.; Crabtree, Robert H.; Brudvig, Gary W.

In: Journal of Catalysis, Vol. 310, 01.02.2014, p. 37-44.

Research output: Contribution to journalArticle

Durrell, AC, Li, G, Koepf, M, Young, KJ, Negre, CFA, Allen, LJ, McNamara, WR, Song, HE, Batista, VS, Crabtree, RH & Brudvig, GW 2014, 'Photoelectrochemical oxidation of a turn-on fluorescent probe mediated by a surface MnII catalyst covalently attached to TiO2 nanoparticles', Journal of Catalysis, vol. 310, pp. 37-44. https://doi.org/10.1016/j.jcat.2013.07.001
Durrell, Alec C. ; Li, Gonghu ; Koepf, Matthieu ; Young, Karin J. ; Negre, Christian F A ; Allen, Laura J. ; McNamara, William R. ; Song, Hee Eun ; Batista, Victor S. ; Crabtree, Robert H. ; Brudvig, Gary W. / Photoelectrochemical oxidation of a turn-on fluorescent probe mediated by a surface MnII catalyst covalently attached to TiO2 nanoparticles. In: Journal of Catalysis. 2014 ; Vol. 310. pp. 37-44.
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