Yu Yixuan, Korgel Brian A
Department of Chemical Engineering, Texas Materials Institute, and Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712-1062, United States.
Langmuir. 2015 Jun 16;31(23):6532-7. doi: 10.1021/acs.langmuir.5b01291. Epub 2015 Jun 3.
Undecanoic acid facilitates attachment of styrene to hydride-terminated Si nanocrystals at room temperature, avoiding polymerization of styrene, yielding free-standing styrene-terminated Si nanocrystals. The nanocrystals have diamond cubic crystal structure, with photophysical properties similar to typical alkene-capped Si nanocrystals, such as bright photoluminescence with relatively long radiative lifetimes. We propose a reaction mechanism for room temperature styrene addition in which the resonance form of undecanoic acid coordinates to surface Si-H and facilitates H(-) attack at terminal C═C of styrene.
十一酸在室温下促进苯乙烯与氢封端的硅纳米晶体的附着，避免苯乙烯聚合，生成独立的苯乙烯封端的硅纳米晶体。这些纳米晶体具有金刚石立方晶体结构，其光物理性质类似于典型的烯烃封端的硅纳米晶体，例如具有相对较长辐射寿命的明亮光致发光。我们提出了一种室温下苯乙烯加成的反应机理，其中十一酸的共振形式与表面硅氢键配位，并促进氢负离子对苯乙烯末端碳碳双键的进攻。
