Abstract
This paper reports visible-light sensitization of TiO2 nanoparticles by surface modification with Mn(II)-terpyridine complexes, as evidenced by UV-vis spectroscopy of colloidal thin films and aqueous suspensions. Photoexcitation of the [MnII(H2O) 3(catechol-terpy)]2+/TiO2 (terpy = 2,2′:6,2″-terpyridine) complex, attached to the TiO2 surface, leads to interfacial electron transfer within 300 fs as indicated by ultrafast optical pumpterahertz probe transient measurements and computational simulations. Photoinduced interfacial electron transfer is accompanied by Mn(II) → Mn(III) photooxidation. The half-time for regeneration of the Mn(II) complex is ca. 23 s (at 6 K), as monitored by time-resolved measurements of the Mn(II) EPR signal.
| Original language | English |
|---|---|
| Pages (from-to) | 11982-11990 |
| Number of pages | 9 |
| Journal | Journal of Physical Chemistry C |
| Volume | 111 |
| Issue number | 32 |
| DOIs | |
| Publication status | Published - Aug 16 2007 |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Electronic, Optical and Magnetic Materials
- Surfaces, Coatings and Films
- Energy(all)
Cite this
Ultrafast photooxidation of Mn(II)-terpyridine complexes covalently attached to TiO2 nanoparticles. / Abuabara, Sabas G.; Cady, Clyde W.; Baxter, Jason B.; Schmuttenmaer, Charles A.; Crabtree, Robert H.; Brudvig, Gary W.; Batista, Victor S.
In: Journal of Physical Chemistry C, Vol. 111, No. 32, 16.08.2007, p. 11982-11990.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ultrafast photooxidation of Mn(II)-terpyridine complexes covalently attached to TiO2 nanoparticles
AU - Abuabara, Sabas G.
AU - Cady, Clyde W.
AU - Baxter, Jason B.
AU - Schmuttenmaer, Charles A.
AU - Crabtree, Robert H.
AU - Brudvig, Gary W.
AU - Batista, Victor S.
PY - 2007/8/16
Y1 - 2007/8/16
N2 - This paper reports visible-light sensitization of TiO2 nanoparticles by surface modification with Mn(II)-terpyridine complexes, as evidenced by UV-vis spectroscopy of colloidal thin films and aqueous suspensions. Photoexcitation of the [MnII(H2O) 3(catechol-terpy)]2+/TiO2 (terpy = 2,2′:6,2″-terpyridine) complex, attached to the TiO2 surface, leads to interfacial electron transfer within 300 fs as indicated by ultrafast optical pumpterahertz probe transient measurements and computational simulations. Photoinduced interfacial electron transfer is accompanied by Mn(II) → Mn(III) photooxidation. The half-time for regeneration of the Mn(II) complex is ca. 23 s (at 6 K), as monitored by time-resolved measurements of the Mn(II) EPR signal.
AB - This paper reports visible-light sensitization of TiO2 nanoparticles by surface modification with Mn(II)-terpyridine complexes, as evidenced by UV-vis spectroscopy of colloidal thin films and aqueous suspensions. Photoexcitation of the [MnII(H2O) 3(catechol-terpy)]2+/TiO2 (terpy = 2,2′:6,2″-terpyridine) complex, attached to the TiO2 surface, leads to interfacial electron transfer within 300 fs as indicated by ultrafast optical pumpterahertz probe transient measurements and computational simulations. Photoinduced interfacial electron transfer is accompanied by Mn(II) → Mn(III) photooxidation. The half-time for regeneration of the Mn(II) complex is ca. 23 s (at 6 K), as monitored by time-resolved measurements of the Mn(II) EPR signal.
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UR - http://www.scopus.com/inward/citedby.url?scp=34548272271&partnerID=8YFLogxK
U2 - 10.1021/jp072380h
DO - 10.1021/jp072380h
M3 - Article
VL - 111
SP - 11982
EP - 11990
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 32
ER -