Formation of molecular templates containing cumulative double bonds (C=C=C) at organic/silicon hybrid interfaces.
The cumulative double bond (C=C=C), an important intermediate in synthetic organic chemistry, was successfully prepared via the selective attachment of acetylethyne to Si(111)-7 x 7. The experimental observation of the characteristic vibrational modes and electronic structures of the C=C=C group in the surface species demonstrates the [4 + 2]-like cycloaddition occurring between the terminal O and C atoms of acetylethyne and the neighboring Si adatom-rest atom pair, consistent with the prediction of density functional theory calculations. Scanning tunneling microscopy images further reveal that the molecules selectively bind to the adjacent adatom-rest atom pairs on Si(111)-7 x 7.
Huang
Hai Gou
HG
Department of Chemistry, National University of Singapore, 10 Kent Ridge, Singapore, 119260.
Huang
Jing Yan
JY
Zhang
Yong Ping
YP
Ning
Yue Sheng
YS
Yong
Kian Soon
KS
Xu
Guo Qin
GQ