Inelastic scattering of OH radicals from organic liquids: isolating the thermal desorption channel.

Inelastic scattering of OH radicals from organic liquids: isolating the thermal desorption channel.
复制标题

有机液体中 OH 自由基的非弹性散射:隔离热解吸通道。

DOI:
10.1039/c3cp51708j
复制
发表时间:
2013
期刊:
PCCP
影响因子:
--
通讯作者:
King KL
King KL
中科院分区:
--
文献类型:
--
作者:
King KL

文献摘要

参考文献

被引文献

相似文献

已经通过实验研究了 OH 自由基从液体表面的非弹性散射。最初平移和旋转热分布的 OH 是由烯丙醇的 193 nm 光解产生的。这些自由基从惰性参比液体全氟聚醚 (PFPE) 以及潜在反应性烃类液体角鲨烷 (C30H62, 2,6,10,15,19,23-六甲基二十四烷) 和角鲨烯 (C30H50,反式-2,6,10,15,19,23-六甲基二十四碳烯-2,6,10,14,18,22-己烯)。通过激光诱导荧光检测分散的 OH v = 0 产物。观察到产物的平移能和旋转能之间存在很强的相关性。高N能级是平移热的,与主要是直接的脉冲散射机制一致。脉冲散射也存在于较低的 N 水平中,但对于所有三种液体来说,也可以清楚地看到具有热解吸特性的平移弛豫 OH 的成分。角鲨烷中存在的这种平移和旋转松弛的 OH 比角鲨烯中存在的更多。现实的分子动力学模拟证实,角鲨烯表面存在双键位点。这支持了角鲨烯上松弛的 OH 可能通过加成机制丢失的主张。
Inelastic scattering of OH radicals from liquid surfaces has been investigated experimentally. An initially translationally and rotationally hot distribution of OH was generated by 193 nm photolysis of allyl alcohol. These radicals were scattered from an inert reference liquid, perfluorinated polyether (PFPE), and from the potentially reactive hydrocarbon liquids squalane (C30H62, 2,6,10,15,19,23-hexamethyltetracosane) and squalene (C30H50, trans-2,6,10,15,19,23-hexamethyltetracosa-2,6,10,14,18,22-hexaene). The scattered OH v = 0 products were detected by laser-induced fluorescence. Strong correlations were observed between the translational and rotational energies of the products. The high-N levels are translationally hot, consistent with a predominantly direct, impulsive scattering mechanism. Impulsive scattering also populates the lower-N levels, but a component of translationally relaxed OH, with thermal-desorption characteristics, can also be seen clearly for all three liquids. More of this translationally and rotationally relaxed OH survives from squalane than from squalene. Realistic molecular dynamics simulations confirm that double-bond sites are accessible at the squalene surface. This supports the proposition that relaxed OH may be lost on squalene via an addition mechanism.
DOI: 10.1021/jz1013032
发表时间: 2011-01
期刊: The journal of physical chemistry letters
影响因子: --
作者:
C. Waring;P. Bagot;M. Costen;K. McKendrick
通讯作者: C. Waring;P. Bagot;M. Costen;K. McKendrick
高温氧原子在离子液体表面的散射动力学:[emim][NTf2]和[C12mim][NTf2]
DOI: --
发表时间: 2010
期刊:
影响因子: --
作者:
Bohan Wu;Jianming Zhang;T. Minton;K. McKendrick;John M. Slattery;Scott Yockel;G. Schatz
通讯作者: G. Schatz
直接气液界面动力学:O(3P) 和液态烃之间的反应。
DOI: 10.1021/jp056128q
发表时间: 2006
期刊: The journal of physical chemistry. B
影响因子: --
作者:
Sven P K Köhler;M. Allan;M. Costen;K. McKendrick
通讯作者: K. McKendrick
O(3P) 原子与烷基硫醇自组装单层反应的动力学。
DOI: 10.1021/jp8109868
发表时间: 2009
期刊: The journal of physical chemistry. A
影响因子: --
作者:
C. Waring;P. Bagot;Minna T. Räisänen;M. Costen;K. McKendrick
通讯作者: K. McKendrick
通过分子散射研究液体表面的动力学过程
DOI: 10.1039/ft9938903877
发表时间: 1993
期刊: Journal of the Chemical Society, Faraday Transactions
影响因子: --
作者:
A. Kenyon;A. J. McCaffery;C. Quintella;M. Zidan
通讯作者: M. Zidan