Architecturing Covalently Bonded Organic Bilayers on the Si(111)-(7 x 7) Surface via in Situ Photoinduced Reaction

作者：Zhang Yong Ping; He Jing Hui; Xu Guo Qin^*; Tok Eng Soon

来源：Journal of Physical Chemistry C, 2012, 116(16): 8943-8949.

DOI：10.1021/jp300173d

Controlled formation of covalently bonded N-benzylideneaniline-like. molecular layers has been achieved by photoinduced reaction of benzonitrile molecules physisorbed on the 4-bromostyrene modified Si(111)-(7 X 7) surface. The photoinduced reaction results in the C-Br bond cleavage and produces a radical site which concurrently reacts with the C N cyano group of the physisorbed benzonitrile molecule above to form the -C-N = C- covalent linkage. X-ray photoelectron spectroscopy (XPS) and high-resolution electron energy loss spectroscopy (HREELS) experiments together with density functional theory (DFT) calculations confirm the formation of covalently bonded N-benzylideneaniline-like molecular layers on the silicon surface. The formation of this secondary molecular layer by photoinduced reaction may provide a direct pathway for further organic synthesis and fabrication of organic multilayers on semiconductor surfaces in a well-controlled enviornment.

• 出版日期2012-4-26