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 language | English |
|---|---|
| Pages (from-to) | 37-44 |
| Number of pages | 8 |
| Journal | Journal of Catalysis |
| Volume | 310 |
| DOIs | |
| Publication status | Published - Feb 1 2014 |
Fingerprint
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 journal › Article
}
TY - JOUR
T1 - Photoelectrochemical oxidation of a turn-on fluorescent probe mediated by a surface MnII catalyst covalently attached to TiO2 nanoparticles
AU - Durrell, Alec C.
AU - Li, Gonghu
AU - Koepf, Matthieu
AU - Young, Karin J.
AU - Negre, Christian F A
AU - Allen, Laura J.
AU - McNamara, William R.
AU - Song, Hee Eun
AU - Batista, Victor S.
AU - Crabtree, Robert H.
AU - Brudvig, Gary W
PY - 2014/2/1
Y1 - 2014/2/1
N2 - 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.
AB - 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.
KW - Dye-sensitized photoelectrochemical cell
KW - Photoanode
KW - Turn-on fluorescence
UR - http://www.scopus.com/inward/record.url?scp=84891957940&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84891957940&partnerID=8YFLogxK
U2 - 10.1016/j.jcat.2013.07.001
DO - 10.1016/j.jcat.2013.07.001
M3 - Article
VL - 310
SP - 37
EP - 44
JO - Journal of Catalysis
JF - Journal of Catalysis
SN - 0021-9517
ER -