Adsorption-induced conformational changes of porphyrin derivatives and formation of twin superstructures on a copper surface

T. Sekiguchi; Y. Wakayama; S. Yokoyama; T. Kamikado; S. Mashiko

doi:10.1016/j.tsf.2004.06.084

Adsorption-induced conformational changes of porphyrin derivatives and formation of twin superstructures on a copper surface

T. Sekiguchi, Y. Wakayama, S. Yokoyama, T. Kamikado, S. Mashiko

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

16 Citations (Scopus)

Abstract

The adsorbed structures and assembly behavior of porphyrin derivatives on Cu substrates were studied using low-temperature scanning tunneling microscopy (STM). The STM images showed that a porphyrin molecule with four tert-butyl-phenyl groups (H₂-TBPP) forms twin domains of a square superstructure. The deformation of H₂-TBPP required to explain the STM images forms a pair of corresponding chiral conformations. The conformation determines which of the twin domains is formed. In contrast, porphyrin molecules with two tert-butyl-phenyl and two vinyl-phenyl groups (H₂-TBPVPP) showed no form of ordered assembly due to the strong interaction between the vinyl-phenyl and substrate. STM observation showed that cis- and trans-H ₂-TBPVPP undergo different conformational changes, leading to mirror and two-fold symmetry, respectively.

Original language	English
Pages (from-to)	393-397
Number of pages	5
Journal	Thin Solid Films
Volume	464-465
DOIs	https://doi.org/10.1016/j.tsf.2004.06.084
Publication status	Published - Oct 2004
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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10.1016/j.tsf.2004.06.084

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title = "Adsorption-induced conformational changes of porphyrin derivatives and formation of twin superstructures on a copper surface",

abstract = "The adsorbed structures and assembly behavior of porphyrin derivatives on Cu substrates were studied using low-temperature scanning tunneling microscopy (STM). The STM images showed that a porphyrin molecule with four tert-butyl-phenyl groups (H2-TBPP) forms twin domains of a square superstructure. The deformation of H2-TBPP required to explain the STM images forms a pair of corresponding chiral conformations. The conformation determines which of the twin domains is formed. In contrast, porphyrin molecules with two tert-butyl-phenyl and two vinyl-phenyl groups (H2-TBPVPP) showed no form of ordered assembly due to the strong interaction between the vinyl-phenyl and substrate. STM observation showed that cis- and trans-H 2-TBPVPP undergo different conformational changes, leading to mirror and two-fold symmetry, respectively.",

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journal = "Thin Solid Films",

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T1 - Adsorption-induced conformational changes of porphyrin derivatives and formation of twin superstructures on a copper surface

AU - Sekiguchi, T.

AU - Wakayama, Y.

AU - Yokoyama, S.

AU - Kamikado, T.

AU - Mashiko, S.

PY - 2004/10

Y1 - 2004/10

N2 - The adsorbed structures and assembly behavior of porphyrin derivatives on Cu substrates were studied using low-temperature scanning tunneling microscopy (STM). The STM images showed that a porphyrin molecule with four tert-butyl-phenyl groups (H2-TBPP) forms twin domains of a square superstructure. The deformation of H2-TBPP required to explain the STM images forms a pair of corresponding chiral conformations. The conformation determines which of the twin domains is formed. In contrast, porphyrin molecules with two tert-butyl-phenyl and two vinyl-phenyl groups (H2-TBPVPP) showed no form of ordered assembly due to the strong interaction between the vinyl-phenyl and substrate. STM observation showed that cis- and trans-H 2-TBPVPP undergo different conformational changes, leading to mirror and two-fold symmetry, respectively.

AB - The adsorbed structures and assembly behavior of porphyrin derivatives on Cu substrates were studied using low-temperature scanning tunneling microscopy (STM). The STM images showed that a porphyrin molecule with four tert-butyl-phenyl groups (H2-TBPP) forms twin domains of a square superstructure. The deformation of H2-TBPP required to explain the STM images forms a pair of corresponding chiral conformations. The conformation determines which of the twin domains is formed. In contrast, porphyrin molecules with two tert-butyl-phenyl and two vinyl-phenyl groups (H2-TBPVPP) showed no form of ordered assembly due to the strong interaction between the vinyl-phenyl and substrate. STM observation showed that cis- and trans-H 2-TBPVPP undergo different conformational changes, leading to mirror and two-fold symmetry, respectively.

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JO - Thin Solid Films

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ER -

Adsorption-induced conformational changes of porphyrin derivatives and formation of twin superstructures on a copper surface

Abstract

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