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Hydroxyl-Induced Partial Charge States of Single Porphyrins on Titania Rutile

Pawlak, Remy and Sadeghi, Ali and Johr, Res and Hinaut, Antoine and Meier, Tobias and Kawai, Shigeki and Zajac, Lukasz and Olszowski, Piotr and Godlewski, Szymon and Such, Bartosz and Glatzel, Thilo and Goedecker, Stefan and Szymonski, Marek and Meyer, Ernst. (2017) Hydroxyl-Induced Partial Charge States of Single Porphyrins on Titania Rutile. Journal of Physical Chemistry C, 121 (6). pp. 3607-3614.

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Official URL: http://edoc.unibas.ch/58446/

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Abstract

The adsorption of Cu porphyrin derivatives terminated with peripheral carboxyphenyl side groups on hydroitylated TiO2(110) surfaces is investigated by combined scanning tunneling microscopy (STM), atomic force microscopy (AFM), and density functional theory (DFT). Two distinct contrasts of the molecules are revealed by STM and tunneling spectroscopy. Via single-molecule manipulations, the origin of these peculiar contrasts is found to arise from :the,presence or not of hydroxyl groups below the molecules. Hence, the electronic coupling of the molecule with the underlying TiO2 surface is locally modified altering the amount of charge transfer and thus their charge state at the molecular scale. Our results particularly underline the fundamental role of hydroxyls of TiO2 on the, charge state of adsorbed organic molecules potentially used in dye-sensitized solar cells.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer)
UniBasel Contributors:Meyer, Ernst
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
ISSN:1932-7447
e-ISSN:1932-7455
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:17 Jan 2018 11:07
Deposited On:15 Jan 2018 15:08

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