Bohamud Tamam, Höfer Ulrich, Dürr Michael
Fachbereich Physik and Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg, Germany.
J Chem Phys. 2021 Mar 28;154(12):124708. doi: 10.1063/5.0045955.
The reaction dynamics of allyl methyl ether (AME) on Si(001) was studied by means of molecular beam techniques. The reaction of this bifunctional molecule comprising an ether and an alkene group was found to proceed via an intermediate state as deduced from the temperature dependence of the initial sticking probability s. At constant surface temperature T, s decreases continuously with increasing kinetic energy E, indicating a non-activated adsorption channel. Qualitatively and quantitatively, the energy dependence is almost identical to the adsorption dynamics of diethyl ether on Si(001). We attribute this to a similar nature of the intermediate state, which largely determines the adsorption dynamics. In consequence, this indicates a predominant role of the ether group and a minor influence of the C=C double bond on the adsorption dynamics of AME on Si(001).
采用分子束技术研究了烯丙基甲基醚（AME）在Si(001)上的反应动力学。从初始吸附概率s的温度依赖性推断，这个包含醚基和烯基的双功能分子的反应通过一个中间态进行。在恒定的表面温度T下，s随着动能E的增加而持续降低，表明存在一个非活化吸附通道。在定性和定量方面，能量依赖性与二乙醚在Si(001)上的吸附动力学几乎相同。我们将此归因于中间态的相似性质，它在很大程度上决定了吸附动力学。因此，这表明醚基在AME在Si(001)上的吸附动力学中起主要作用，而C=C双键的影响较小。
