Inhomogeneous charge transfer within monolayer zinc phthalocyanine absorbed on TiO2(110)
(2012) In Journal of Chemical Physics 136(15).- Abstract
- The d-orbital contribution from the transition metal centers of phthalocyanine brings difficulties to understand the role of the organic ligands and their molecular frontier orbitals when it adsorbs on oxide surfaces. Here we use zinc phthalocyanine (ZnPc)/TiO2(110) as a model system where the zinc d-orbitals are located deep below the organic orbitals leaving room for a detailed study of the interaction between the organic ligand and the substrate. A charge depletion from the highest occupied molecular orbital is observed, and a consequent shift of N1s and C1s to higher binding energy in photoelectron spectroscopy (PES). A detailed comparison of peak shifts in PES and near-edge X-ray absorption fine structure spectroscopy illustrates a... (More)
- The d-orbital contribution from the transition metal centers of phthalocyanine brings difficulties to understand the role of the organic ligands and their molecular frontier orbitals when it adsorbs on oxide surfaces. Here we use zinc phthalocyanine (ZnPc)/TiO2(110) as a model system where the zinc d-orbitals are located deep below the organic orbitals leaving room for a detailed study of the interaction between the organic ligand and the substrate. A charge depletion from the highest occupied molecular orbital is observed, and a consequent shift of N1s and C1s to higher binding energy in photoelectron spectroscopy (PES). A detailed comparison of peak shifts in PES and near-edge X-ray absorption fine structure spectroscopy illustrates a slightly uneven charge distribution within the molecular plane and an inhomogeneous charge transfer screening between the center and periphery of the organic ligand: faster in the periphery and slower at the center, which is different from other metal phthalocyanine, e. g., FePc/TiO2. Our results indicate that the metal center can substantially influence the electronic properties of the organic ligand at the interface by introducing an additional charge transfer channel to the inner molecular part. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3699072] (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2569442
- author
- Yu, Shun ; Ahmadi, Sareh ; Sun, Chenghua ; Adibi, Pooya Tabib Zadeh ; Chow, Winnie ; Pietzsch, Annette LU and Gothelid, Mats
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Chemical Physics
- volume
- 136
- issue
- 15
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- wos:000303147000034
- scopus:84860168047
- ISSN
- 0021-9606
- DOI
- 10.1063/1.3699072
- language
- English
- LU publication?
- yes
- id
- 0f63778a-d25c-4388-bfa2-3b127d497dbd (old id 2569442)
- date added to LUP
- 2016-04-01 10:46:15
- date last changed
- 2022-02-25 05:34:22
@article{0f63778a-d25c-4388-bfa2-3b127d497dbd,
abstract = {{The d-orbital contribution from the transition metal centers of phthalocyanine brings difficulties to understand the role of the organic ligands and their molecular frontier orbitals when it adsorbs on oxide surfaces. Here we use zinc phthalocyanine (ZnPc)/TiO2(110) as a model system where the zinc d-orbitals are located deep below the organic orbitals leaving room for a detailed study of the interaction between the organic ligand and the substrate. A charge depletion from the highest occupied molecular orbital is observed, and a consequent shift of N1s and C1s to higher binding energy in photoelectron spectroscopy (PES). A detailed comparison of peak shifts in PES and near-edge X-ray absorption fine structure spectroscopy illustrates a slightly uneven charge distribution within the molecular plane and an inhomogeneous charge transfer screening between the center and periphery of the organic ligand: faster in the periphery and slower at the center, which is different from other metal phthalocyanine, e. g., FePc/TiO2. Our results indicate that the metal center can substantially influence the electronic properties of the organic ligand at the interface by introducing an additional charge transfer channel to the inner molecular part. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3699072]}},
author = {{Yu, Shun and Ahmadi, Sareh and Sun, Chenghua and Adibi, Pooya Tabib Zadeh and Chow, Winnie and Pietzsch, Annette and Gothelid, Mats}},
issn = {{0021-9606}},
language = {{eng}},
number = {{15}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Journal of Chemical Physics}},
title = {{Inhomogeneous charge transfer within monolayer zinc phthalocyanine absorbed on TiO2(110)}},
url = {{http://dx.doi.org/10.1063/1.3699072}},
doi = {{10.1063/1.3699072}},
volume = {{136}},
year = {{2012}},
}