Thermal Reaction of 2,4-Dibromopyridine on Cu(100)

Jong Liang Lin, Chia Hao Ye, Bo Chiuan Lin, Szu Hui Li, Zi Xian Yang, Yu Hsien Chiang, Shang Wei Chen, Chia Hsin Wang, Yaw Wen Yang, Jiing Chyuan Lin

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

Nitrogen-containing aromatics have potential applications in surface functionalization, corrosion inhibition, and carbon-nitride materials. Reflection-absorption infrared spectroscopy (RAIRS), X-ray photoelectron spectroscopy (XPS), near-edge X-ray absorption fine structure (NEXAFS), and temperature-programmed reaction/desorption (TPR/D) have been employed to study the system of 2,4-C5NH3Br2/Cu(100). Our experimental results indicate that 2,4-C5NH3Br2 is adsorbed predominantly in molecular form on Cu(100) at 100 K; however, a tiny fraction of the adsorbed molecules is subjected to debromination. The 2,4-C5NH3Br2 undergoes partial C-Br dissociation below 400 K, forming C5NH3Br intermediate. Although after breaking both the C-Br bonds (>400 K), 2,4-pyridyne (C5NH3) can be formed, the possibility of Ullmann coupling reaction cannot be excluded. The NEXFAS study shows a μ 35° average inclination of the aromatic plane, with respect to the surface, in a packed 2,4-pyridyne adsorption layer. Thermal decomposition of the C5NH3 or its coupling reaction products on the Br/Cu(100) surface mainly occurs at a temperature higher than 550 K, generating H2, HCN, HBr, and (CN)2.

原文English
頁(從 - 到)26471-26480
頁數10
期刊Journal of Physical Chemistry C
119
發行號47
DOIs
出版狀態Published - 2015 十一月 25

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 能源(全部)
  • 物理與理論化學
  • 表面、塗料和薄膜

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