Structure and photo-induced charge transfer of pyridine molecules adsorbed on TiO2(110): A NEXAFS and core-hole-clock study

Hiroshi Kondoh, Yuki Higashi, Masaaki Yoshida, Yuji Monya, Ryo Toyoshima, Kazuhiko Mase, Kenta Amemiya, Fukashi Tsukioka, Masanari Nagasaka, Yasuhiro Iwasawa, Hideo Orita, Kozo Mukai, Jun Yoshinobu

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Abstract

The structure and photo-induced charge transfer time of pyridine molecules adsorbed on a rutile TiO2(110) surface have been studied by near-edge x-ray absorption fine structure (NEXAFS) spectroscopy, density functional theory (DFT) calculations and core-hole-clock (CHC) spectroscopy. Polarization dependence of NEXAFS spectra and geometrical optimization by the DFTcalculations revealed that the pyridine molecules are bound to the TiO2 surface with an upright configuration where the N atom binds to a surface Ti atom. The CHC results indicate that the charge transfer from the LUMO+2 orbital of pyridine with a Π* symmetry to the conduction band of TiO2 is quite fast, where the timescale is less than 3 fs.

Original languageEnglish
Pages (from-to)341-345
Number of pages5
JournalElectrochemistry
Volume82
Issue number5
DOIs
Publication statusPublished - 2014 May

Keywords

  • Core-hole-clock spectroscopy
  • Near-edge x-ray absorption fine structure
  • Pyridine

ASJC Scopus subject areas

  • Electrochemistry

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    Kondoh, H., Higashi, Y., Yoshida, M., Monya, Y., Toyoshima, R., Mase, K., Amemiya, K., Tsukioka, F., Nagasaka, M., Iwasawa, Y., Orita, H., Mukai, K., & Yoshinobu, J. (2014). Structure and photo-induced charge transfer of pyridine molecules adsorbed on TiO2(110): A NEXAFS and core-hole-clock study. Electrochemistry, 82(5), 341-345. https://doi.org/10.5796/electrochemistry.82.341