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X-ray absorption and photoemission spectroscopy of zinc protoporphyrin adsorbed on rutile TiO2(110) prepared by in situ electrospray deposition

Rienzo, Anna; Mayor, Louise C.; Magnano, Graziano; Satterley, Christopher J.; Ataman, Evren LU ; Schnadt, Joachim LU ; Schulte, Karina LU and O'Shea, James N. (2010) In Journal of Chemical Physics 132(8).
Abstract
Zinc-protoporphyrin, adsorbed on the rutile TiO2(110) surface, has been studied using photoemission spectroscopy and near-edge absorption fine structure spectroscopy to deduce the nature of the molecule-surface bonding and the chemical environment of the central metal atom. To overcome the difficulties associated with sublimation of the porphyrin molecules, samples were prepared in situ using ultrahigh vacuum electrospray deposition, a technique which facilitates the deposition of nonvolatile and fragile molecules. Monolayers of Zn protoporphyrin are found to bond to the surface via the oxygen atoms of the deprotonated carboxyl groups. The molecules initially lie largely parallel to the surface, reorienting to an upright geometry as the... (More)
Zinc-protoporphyrin, adsorbed on the rutile TiO2(110) surface, has been studied using photoemission spectroscopy and near-edge absorption fine structure spectroscopy to deduce the nature of the molecule-surface bonding and the chemical environment of the central metal atom. To overcome the difficulties associated with sublimation of the porphyrin molecules, samples were prepared in situ using ultrahigh vacuum electrospray deposition, a technique which facilitates the deposition of nonvolatile and fragile molecules. Monolayers of Zn protoporphyrin are found to bond to the surface via the oxygen atoms of the deprotonated carboxyl groups. The molecules initially lie largely parallel to the surface, reorienting to an upright geometry as the coverage is increased up to a monolayer. For those molecules directly chemisorbed to the surface, the interaction is sufficiently strong to pull the central metal atom out of the molecule. (C) 2010 American Institute of Physics. (Less)
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publication status
published
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in
Journal of Chemical Physics
volume
132
issue
8
publisher
American Institute of Physics
external identifiers
  • wos:000275029200033
  • scopus:77749296170
ISSN
0021-9606
DOI
10.1063/1.3336747
language
English
LU publication?
yes
id
743fda92-9d3e-47bb-a7ff-ef4e7141e57c (old id 1568123)
date added to LUP
2010-03-24 10:31:59
date last changed
2018-07-01 03:14:03
@article{743fda92-9d3e-47bb-a7ff-ef4e7141e57c,
  abstract     = {Zinc-protoporphyrin, adsorbed on the rutile TiO2(110) surface, has been studied using photoemission spectroscopy and near-edge absorption fine structure spectroscopy to deduce the nature of the molecule-surface bonding and the chemical environment of the central metal atom. To overcome the difficulties associated with sublimation of the porphyrin molecules, samples were prepared in situ using ultrahigh vacuum electrospray deposition, a technique which facilitates the deposition of nonvolatile and fragile molecules. Monolayers of Zn protoporphyrin are found to bond to the surface via the oxygen atoms of the deprotonated carboxyl groups. The molecules initially lie largely parallel to the surface, reorienting to an upright geometry as the coverage is increased up to a monolayer. For those molecules directly chemisorbed to the surface, the interaction is sufficiently strong to pull the central metal atom out of the molecule. (C) 2010 American Institute of Physics.},
  author       = {Rienzo, Anna and Mayor, Louise C. and Magnano, Graziano and Satterley, Christopher J. and Ataman, Evren and Schnadt, Joachim and Schulte, Karina and O'Shea, James N.},
  issn         = {0021-9606},
  language     = {eng},
  number       = {8},
  publisher    = {American Institute of Physics},
  series       = {Journal of Chemical Physics},
  title        = {X-ray absorption and photoemission spectroscopy of zinc protoporphyrin adsorbed on rutile TiO2(110) prepared by in situ electrospray deposition},
  url          = {http://dx.doi.org/10.1063/1.3336747},
  volume       = {132},
  year         = {2010},
}