Bulletin of the Korean Chemical Society

  • 제32권6호
  • /
  • Pages.1980-1984
  • /
  • 2011
  • /
  • 0253-2964(pISSN)
  • /
  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
권호 표지
DOI QR코드

DOI QR Code

Temperature and Coverage Dependent Quasi-reversible Two-photon Photoemission of 1-phenyl-1-propyne on Cu(111)

  • Sohn, Young-Ku (Department of Chemistry, Yeungnam University) ;
  • Wei, Wei (Department of Chemistry and Biochemistry, Center for Materials Chemistry, University of Texas at Austin) ;
  • Huang, Weixin (Hefei National Laboratory for Physical Sciences at the microscale and Department of Chemical Physics, University of Science and Technology of China) ;
  • White, John M. (Department of Chemistry and Biochemistry, Center for Materials Chemistry, University of Texas at Austin)
  • 투고 : 2011.01.17
  • 심사 : 2011.05.06
  • 발행 : 2011.06.20
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

A temperature- and coverage-dependant quasi-reversible change in two-photon photoemission (2PPE) of chemisorbed 1-phenyl-1-propyne (PP) on Cu(111) is reported. For PP on Cu(111) at 300 K probed at a photon energy of 4.13 eV, two broad peaks of comparable intensity show final state energies of 7.25 and 7.75 eV above the Fermi level. The former peak could be assigned to the first image potential state (IS, n = 1) and/or unoccupied molecular orbital (UMO), located at 3.1 eV above the Fermi level. The latter is plausibly attributed to a mix of unoccupied higher-order IS (and/or UMO) and occupied surface state (SS) of Cu(111). With decreasing the temperature, the former 2PPE peak shows a shift in position by about 0.2 eV, and the latter exhibits a dramatic increase in intensity. In the system, intermolecular interactions (and/or order-disorder transition) of PP and substrate lattice temperature may play a significant role in change in photoexcitation lifetime (or excitation cross-section), and the unoccupied molecular orbital (UMO)-metal (IS) charge transfer coupling. Our unique 2PPE results provide a deeper insight for understanding photoexcitation charge transfer with temperature in an organic molecule/metal system.

키워드

참고문헌

  1. Zhu, X.-Y. Annu. Rev. Phys. Chem. 2002, 53, 221. https://doi.org/10.1146/annurev.physchem.53.082801.093725
  2. Zhu, X.-Y. Surf. Sci. Rep. 2004, 56, 1. https://doi.org/10.1016/j.surfrep.2004.09.002
  3. Ryu, S.; Chang, J.; Kwon, H.; Kim, S. K. J. Am. Chem. Soc. 2006, 128, 3500. https://doi.org/10.1021/ja058323o
  4. Gudde, J.; Berthold, W.; Hofer, U. Chem. Rev. 2006, 106, 4261. https://doi.org/10.1021/cr050171s
  5. Petek, H.; Ogawa, S. Prog. Surf. Sci. 1997, 56, 239. https://doi.org/10.1016/S0079-6816(98)00002-1
  6. Harris, C. B.; Ge, N.-H.; Lingle, R. L., Jr.; McNeill, J. D.; Wong, C. M. Annu. Rev. Phys. Chem. 1997, 48, 711. https://doi.org/10.1146/annurev.physchem.48.1.711
  7. Gaffney, K. J.; Miller, A. D.; Harris, C. B. J. Phys Chem. B. 2001, 105, 9031. https://doi.org/10.1021/jp010931c
  8. Lindstrom, C. D.; Muntwiler, M.; Zhu, X.-Y. J. Phys. Chem. B. 2005, 109, 21492. https://doi.org/10.1021/jp054663k
  9. Wolf, M.; Hotzel, A.; Knoesel, E.; Velic, D. J. M. Phys. Rev. B 1999, 59, 5926. https://doi.org/10.1103/PhysRevB.59.5926
  10. Wei, W.; Zhao, W.; White, J. M. J. Am. Chem. Soc. 2004, 126, 16340. https://doi.org/10.1021/ja044381i
  11. Sohn, Y.; Wei, W.; White, J. M. Langmuir 2007, 23, 12185. https://doi.org/10.1021/la702241m
  12. Yamada, T.; Shibuta, M.; Ami, Y.; Takano, Y.; Nonaka, A.; Miyakubo, K.; Munakata, T. J. Phys. Chem. C 2010, 114, 13334. https://doi.org/10.1021/jp1045194
  13. Giesen, K.; Hage, F.; Himpsel, F. J.; Riess, H. J.; Steinman, W. Phys. Rev. B 1986, 33, 5241. https://doi.org/10.1103/PhysRevB.33.5241
  14. Wang, H.; Dutton, G.; Zhu, X.-Y. J. Phys. Chem. B 2000, 104, 10332. https://doi.org/10.1021/jp002257p
  15. Knoesel, E.; Hotzel, A.; Wolf, M. J. Electron Spectrosc. Relat. Phenom. 1998, 88, 577. https://doi.org/10.1016/S0368-2048(97)00178-3
  16. Steinmann, W. Phys. Stat. Sol (b) 1995, 192, 339. https://doi.org/10.1002/pssb.2221920210
  17. Fauster, T.; Weinelt, M.; Hofer, U. Prog. Surf. Sci. 2007, 82, 224. https://doi.org/10.1016/j.progsurf.2007.03.007
  18. Scholl, A.; Kilian1, L.; Zou, Y.; Ziroff1, J.; Hame, S.; Reinert, F.; Umbach, E.; Fink, R. H. Science 2010, 329, 303. https://doi.org/10.1126/science.1189106