Adsorption of helical aromatic molecules: heptahelicene on Ni(111)
Adsorption of helical aromatic molecules: heptahelicene on Ni(111)
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DOI：
10.1016/s0039-6028(03)00489-8
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发表时间：
2003-05-01
期刊：
影响因子：
1.9
通讯作者：
Ellerbeck, U
中科院分区：
文献类型：
--
作者：
Ernst, KH;Kuster, Y;Ellerbeck, U
通过 STM、TPD、LEED、ToF-SIMS、XPS 和 AES 在 130 至 1000 K 的温度下研究了螺旋形多环芳烃七螺旋烯 (C30H18) 在 Ni(111) 上的吸附。单层分子在高达 500 K 的温度下仍保持完整。高于该温度时，会逐步分解为碳和氢；后者随后解吸为H-2。在亚单层覆盖下，分子被随机吸附。饱和单层显示出长程有序，但没有观察到纯对映体或外消旋混合物产生的结构之间存在差异。 (C) 2003 Elsevier Science B.V. 保留所有权利。
The adsorption of the helically shaped polyaromatic hydrocarbon heptahelicene (C30H18) on Ni(111) was studied by means of STM, TPD, LEED, ToF-SIMS, XPS, and AES at temperatures between 130 and 1000 K. The molecule in the monolayer remains intact up to 500 K. Above that temperature a stepwise decomposition into carbon and hydrogen occurs; the latter desorbing subsequently as H-2. At submonolayer coverages the molecules are adsorbed randomly. The saturated monolayer shows long-range order, but no differences between the structures generated by a pure enantiomer or the racemic mixture have been observed. (C) 2003 Elsevier Science B.V. All rights reserved.