Abstract
TiO2 nanoparticles were modified with a porphyrin derivative, 5-[4-benzoic acid]-10,15,20-tris[3,5-di-tert-butylphenyl]-21H,23H-porphyrin (H2P-COOH), and fluorescein derivatives, 9-[2-(3-carboxy-9,10- diphenyl)anthryl]-2,7-difluoro-6-hydroxy-3H-xanthen-3-one (DPAX-COOH) and 2′,7′-difluorofluorescein (FL-COOH). The dye-modified TiO 2 nanoparticles were deposited on nanostructured OTE/SnO2 (OTE: optically transparent electrodes) together with nanoclusters of fullerene (C60) from acetonitrile/toluene (3:1, v/v) using an electrophoretic deposition technique. The dye-modified TiO2 composite electrodes [OTE/SnO2/(dye + C60)n] have broad as well as high absorbance properties in the visible region, exhibiting the photo response under visible light excitation using I3-/I- redox couple. The incident photon to photocurrent efficiency (IPCE) for these electrodes increases in order: OTE/SnO2/(H2P)n < OTE/SnO 2/(H2P-COO-TiO2)n < OTE/SnO 2/(H2P-COO-TiO2 + C60). The IPCE value can be further improved by replacing H2P-COOH with a fluorescein derivative containing an electron donor moiety: DPAX-COOH (DPA: diphenylanthracene). The maximum IPCE value (42%) is obtained for OTE/SnO 2/(DPAX-COO-TiO2 + C60)n under the bias of 0.2 V vs. SCE.
| Original language | English |
|---|---|
| Pages (from-to) | 243-252 |
| Number of pages | 10 |
| Journal | Chemical Physics |
| Volume | 319 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 2005 Dec 7 |
| Externally published | Yes |
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Keywords
- Fluorescein
- Fullerene
- Light energy conversion
- Porphyrin
- TiO nanoparticles
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Spectroscopy
- Atomic and Molecular Physics, and Optics
Cite this
Organization of supramolecular assemblies of fullerene, porphyrin and fluorescein dye derivatives on TiO2 nanoparticles for light energy conversion. / Hasobe, Taku; Hattori, Shigeki; Kamat, Prashant V.; Urano, Yasuteru; Umezawa, Naoki; Nagano, Tetsuo; Fukuzumi, Shunichi.
In: Chemical Physics, Vol. 319, No. 1-3, 07.12.2005, p. 243-252.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Organization of supramolecular assemblies of fullerene, porphyrin and fluorescein dye derivatives on TiO2 nanoparticles for light energy conversion
AU - Hasobe, Taku
AU - Hattori, Shigeki
AU - Kamat, Prashant V.
AU - Urano, Yasuteru
AU - Umezawa, Naoki
AU - Nagano, Tetsuo
AU - Fukuzumi, Shunichi
PY - 2005/12/7
Y1 - 2005/12/7
N2 - TiO2 nanoparticles were modified with a porphyrin derivative, 5-[4-benzoic acid]-10,15,20-tris[3,5-di-tert-butylphenyl]-21H,23H-porphyrin (H2P-COOH), and fluorescein derivatives, 9-[2-(3-carboxy-9,10- diphenyl)anthryl]-2,7-difluoro-6-hydroxy-3H-xanthen-3-one (DPAX-COOH) and 2′,7′-difluorofluorescein (FL-COOH). The dye-modified TiO 2 nanoparticles were deposited on nanostructured OTE/SnO2 (OTE: optically transparent electrodes) together with nanoclusters of fullerene (C60) from acetonitrile/toluene (3:1, v/v) using an electrophoretic deposition technique. The dye-modified TiO2 composite electrodes [OTE/SnO2/(dye + C60)n] have broad as well as high absorbance properties in the visible region, exhibiting the photo response under visible light excitation using I3-/I- redox couple. The incident photon to photocurrent efficiency (IPCE) for these electrodes increases in order: OTE/SnO2/(H2P)n < OTE/SnO 2/(H2P-COO-TiO2)n < OTE/SnO 2/(H2P-COO-TiO2 + C60). The IPCE value can be further improved by replacing H2P-COOH with a fluorescein derivative containing an electron donor moiety: DPAX-COOH (DPA: diphenylanthracene). The maximum IPCE value (42%) is obtained for OTE/SnO 2/(DPAX-COO-TiO2 + C60)n under the bias of 0.2 V vs. SCE.
AB - TiO2 nanoparticles were modified with a porphyrin derivative, 5-[4-benzoic acid]-10,15,20-tris[3,5-di-tert-butylphenyl]-21H,23H-porphyrin (H2P-COOH), and fluorescein derivatives, 9-[2-(3-carboxy-9,10- diphenyl)anthryl]-2,7-difluoro-6-hydroxy-3H-xanthen-3-one (DPAX-COOH) and 2′,7′-difluorofluorescein (FL-COOH). The dye-modified TiO 2 nanoparticles were deposited on nanostructured OTE/SnO2 (OTE: optically transparent electrodes) together with nanoclusters of fullerene (C60) from acetonitrile/toluene (3:1, v/v) using an electrophoretic deposition technique. The dye-modified TiO2 composite electrodes [OTE/SnO2/(dye + C60)n] have broad as well as high absorbance properties in the visible region, exhibiting the photo response under visible light excitation using I3-/I- redox couple. The incident photon to photocurrent efficiency (IPCE) for these electrodes increases in order: OTE/SnO2/(H2P)n < OTE/SnO 2/(H2P-COO-TiO2)n < OTE/SnO 2/(H2P-COO-TiO2 + C60). The IPCE value can be further improved by replacing H2P-COOH with a fluorescein derivative containing an electron donor moiety: DPAX-COOH (DPA: diphenylanthracene). The maximum IPCE value (42%) is obtained for OTE/SnO 2/(DPAX-COO-TiO2 + C60)n under the bias of 0.2 V vs. SCE.
KW - Fluorescein
KW - Fullerene
KW - Light energy conversion
KW - Porphyrin
KW - TiO nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=28644435678&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=28644435678&partnerID=8YFLogxK
U2 - 10.1016/j.chemphys.2005.06.035
DO - 10.1016/j.chemphys.2005.06.035
M3 - Article
AN - SCOPUS:28644435678
VL - 319
SP - 243
EP - 252
JO - Chemical Physics
JF - Chemical Physics
SN - 0301-0104
IS - 1-3
ER -