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Study of Interfacial Charge-Transfer Complex on TiO2 Particles in Aqueous Suspension by Second-Harmonic Generation
Abstract
We report the first direct observation of an interfacial charge-transfer complex using second-harmonic spectroscopy. The second-harmonic spectrum of catechol adsorbed on 0.4 micron-sized TiO 2 (anatase) colloidal particles in aqueous suspension reveals a charge-transfer band centered at 2.72 eV (456 nm). In addition, the adsorption isotherm of catechol on the colloidal TiO 2 suspension was obtained and gave an excellent fit to the Langmuir adsorption model. From this, we infer the free energy of the adsorption to be Δ G ° = −6.8 kcal/mol.
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Citations
Cited by
Bioinspired catecholic chemistry for surface modification
Ye, Q., Zhou, F., & Liu, W. (2011) · Chemical Society Reviews · doi:10.1039/c1cs15026j · Cited by 1,177
Theoretical Studies of Photoinduced Electron Transfer in Dye-Sensitized TiO2
Duncan, W. R., & Prezhdo, O. V. (2007) · Annual Review of Physical Chemistry · doi:10.1146/annurev.physchem.58.052306.144054 · Cited by 580
Zhang, G., Kim, G., & Choi, W. (2014) · Energy & Environmental Science · doi:10.1039/c3ee43147a · Cited by 470
Probing Liquid/Solid Interfaces at the Molecular Level
Zaera, F. (2012) · Chemical Reviews · doi:10.1021/cr2002068 · Cited by 458
Quantum Dynamics Simulations of Interfacial Electron Transfer in Sensitized TiO2 Semiconductors
Rego, L. G. C., & Batista, V. S. (2003) · Journal of the American Chemical Society · doi:10.1021/ja0346330 · Cited by 377
Metadata
- Authors
- Liu, Y., Dadap, J. I., Zimdars, D., & Eisenthal, K. B.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-03-12
- Volume
- 103
- Issue
- 13
- Pages
- 2480-2486
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2025363014
- Cited by
- 161
- References
- 0
- FWCI
- 9.61
- Type
- journal article
- Language
- en
- Open access
- closed
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- Liu, Y., Dadap, J. I., Zimdars, D., & Eisenthal, K. B. (1999). Study of Interfacial Charge-Transfer Complex on TiO2 Particles in Aqueous Suspension by Second-Harmonic Generation. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp984288e
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