Multiple configurations of N-methylpyrrole binding on Si(111)-7×7

Tao, Feng, Yuan, Ze Liang, Chen, Xian Feng, Qiao, Ming Hua, Wang, Zhong Hai, Dai, Yu Jing, Huang, Hai Gou, Cao, Yong and Xu, Guo Qin (2003) Multiple configurations of N-methylpyrrole binding on Si(111)-7×7. Physical review. B, 67 24: 245406-1-245406-8. doi:10.1103/PhysRevB.67.245406

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Author Tao, Feng
Yuan, Ze Liang
Chen, Xian Feng
Qiao, Ming Hua
Wang, Zhong Hai
Dai, Yu Jing
Huang, Hai Gou
Cao, Yong
Xu, Guo Qin
Title Multiple configurations of N-methylpyrrole binding on Si(111)-7×7
Journal name Physical review. B   Check publisher's open access policy
ISSN 1098-0121
Publication date 2003
Sub-type Article (original research)
DOI 10.1103/PhysRevB.67.245406
Open Access Status File (Publisher version)
Volume 67
Issue 24
Start page 245406-1
End page 245406-8
Total pages 8
Place of publication New York
Publisher The American Physical Society
Language eng
Subject 030603 Colloid and Surface Chemistry
Abstract The adsorption configurations of N-methylpyrrole on Si(111)-7×7 were investigated using high-resolution electron energy-loss spectroscopy, x-ray photoelectron spectroscopy (XPS), scanning tunneling microscopy (STM), and density function theory calculations. Compared to physisorbed N-methylpyrrole, chemisorbed molecules present a different vibrational feature at 2886 cm-1 attributable to ν[(Si)Csp3-H] in addition to the vibrational features of (sp2)Cα-H (3106 cm-1), (sp2)Cβ-H (3050 cm-1), and C—H of CH3 (2944 cm-1) stretching modes, demonstrating the direct interaction between C=C bonds and Si(111)-7×7. The major change of N 1s XPS spectrum of N-methylpyrrole upon chemisorption strongly suggests the coexistence of two chemisorption states, further confirmed in the strong dependence of STM image features on the sample bias together with statistical analysis. The concurrent occurrence of [4+2] and [2+2] cycloadditions is proposed to account for these two adsorption configurations of N-methylpyrrole on Si(111)-7×7
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Tue, 27 Jan 2009, 12:07:53 EST by Ms Lynette Adams on behalf of Aust Institute for Bioengineering & Nanotechnology