Influence of molecular conformation on organic/metal interface energetics

Norbert Koch; Georg Heimel; Jishan Wu; Egbert Zojer; Robert L. Johnson; Jean Luc Brédas; Klaus Müllen; Jürgen P. Rabe

doi:10.1016/j.cplett.2005.08.004

Influence of molecular conformation on organic/metal interface energetics

Norbert Koch^*, Georg Heimel, Jishan Wu, Egbert Zojer, Robert L. Johnson, Jean Luc Brédas, Klaus Müllen, Jürgen P. Rabe

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

Using ultraviolet photoemission spectroscopy (UPS), we show that the conformation of a conjugated organic molecule can be changed significantly upon adsorption on a metal surface, even in the case of weak interactions with the metal. This is accomplished by comparing the thickness-dependent spectral evolution for a non-rigid non-planar molecule (p-sexiphenyl) deposited onto Ag(1 1 1), with those of a coplanar molecule (α-sexithienyl) and a rigid non-planar one (1,3,4,6,7,9,10,12,13,15,16,18-dodecamethyl-hexa-peri- hexabenzocoronene). Molecular conformation changes can influence hole injection barriers by at least 0.1 eV. These results have a direct impact on the detailed understanding of organic/metal interfaces.

Original language	English (US)
Pages (from-to)	390-395
Number of pages	6
Journal	Chemical Physics Letters
Volume	413
Issue number	4-6
DOIs	https://doi.org/10.1016/j.cplett.2005.08.004
State	Published - Sep 26 2005
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/j.cplett.2005.08.004

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title = "Influence of molecular conformation on organic/metal interface energetics",

abstract = "Using ultraviolet photoemission spectroscopy (UPS), we show that the conformation of a conjugated organic molecule can be changed significantly upon adsorption on a metal surface, even in the case of weak interactions with the metal. This is accomplished by comparing the thickness-dependent spectral evolution for a non-rigid non-planar molecule (p-sexiphenyl) deposited onto Ag(1 1 1), with those of a coplanar molecule (α-sexithienyl) and a rigid non-planar one (1,3,4,6,7,9,10,12,13,15,16,18-dodecamethyl-hexa-peri- hexabenzocoronene). Molecular conformation changes can influence hole injection barriers by at least 0.1 eV. These results have a direct impact on the detailed understanding of organic/metal interfaces.",

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doi = "10.1016/j.cplett.2005.08.004",

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T1 - Influence of molecular conformation on organic/metal interface energetics

AU - Koch, Norbert

AU - Heimel, Georg

AU - Wu, Jishan

AU - Zojer, Egbert

AU - Johnson, Robert L.

AU - Brédas, Jean Luc

AU - Müllen, Klaus

AU - Rabe, Jürgen P.

PY - 2005/9/26

Y1 - 2005/9/26

N2 - Using ultraviolet photoemission spectroscopy (UPS), we show that the conformation of a conjugated organic molecule can be changed significantly upon adsorption on a metal surface, even in the case of weak interactions with the metal. This is accomplished by comparing the thickness-dependent spectral evolution for a non-rigid non-planar molecule (p-sexiphenyl) deposited onto Ag(1 1 1), with those of a coplanar molecule (α-sexithienyl) and a rigid non-planar one (1,3,4,6,7,9,10,12,13,15,16,18-dodecamethyl-hexa-peri- hexabenzocoronene). Molecular conformation changes can influence hole injection barriers by at least 0.1 eV. These results have a direct impact on the detailed understanding of organic/metal interfaces.

AB - Using ultraviolet photoemission spectroscopy (UPS), we show that the conformation of a conjugated organic molecule can be changed significantly upon adsorption on a metal surface, even in the case of weak interactions with the metal. This is accomplished by comparing the thickness-dependent spectral evolution for a non-rigid non-planar molecule (p-sexiphenyl) deposited onto Ag(1 1 1), with those of a coplanar molecule (α-sexithienyl) and a rigid non-planar one (1,3,4,6,7,9,10,12,13,15,16,18-dodecamethyl-hexa-peri- hexabenzocoronene). Molecular conformation changes can influence hole injection barriers by at least 0.1 eV. These results have a direct impact on the detailed understanding of organic/metal interfaces.

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DO - 10.1016/j.cplett.2005.08.004

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VL - 413

SP - 390

EP - 395

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 4-6

ER -

Influence of molecular conformation on organic/metal interface energetics

Abstract

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