首页> 外文期刊>The Journal of Chemical Physics >Infrared spectra of O-2(-)center dot(CO2)(n) clusters (n=1-6): Asymmetric docking at the pi* orbital
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Infrared spectra of O-2(-)center dot(CO2)(n) clusters (n=1-6): Asymmetric docking at the pi* orbital

机译:O-2(-)中心点(CO2)(n)团簇(n = 1-6)的红外光谱:在pi *轨道上的不对称对接

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Isolated superoxide ions solvated by CO2 have been studied by infrared photodissociation spectroscopy and density-functional theory, using CO2 evaporation upon infrared excitation of the O(2)(-)center dot(CO2)(n) (n=1-6) parent ions. We can assign the observed frequencies to the asymmetric stretch vibration and its combination bands with the symmetric stretch and the overtone of the bending vibration of CO2 in various binding situations. We interpret our findings with the help of density-functional theory. Our data suggest that only one CO2 moiety binds strongly to the O-2(-), whereas the rest of the CO2 molecules are weakly bound, which is consistent with the experimental spectra. The lobes of the pi(*) orbital of O-2(-) provide a template for the structure of the microsolvation environment. (c) 2005 American Institute of Physics.
机译:通过红外光解离光谱和密度泛函理论研究了分离的被CO2溶解的超氧离子,利用O(2)(-)中心点(CO2)(n)(n = 1-6)母体的红外激发作用,利用CO2蒸发离子。我们可以将观察到的频率分配给不对称拉伸振动及其组合带,以及在各种约束情况下CO2的对称拉伸和弯曲振动的泛音。我们借助密度泛函理论来解释我们的发现。我们的数据表明,只有一个CO2部分与O-2(-)牢固结合,而其余的CO2分子则弱结合,这与实验光谱一致。 O-2(-)的pi(*)轨道的波瓣为微溶剂化环境的结构提供了模板。 (c)2005年美国物理研究所。

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