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Superhalogen Species of Titanium Oxide Related Clusters Generated by Laser Ablation

机译:激光烧蚀产生的氧化钛相关簇的过卤素种类

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Negative ion mass spectrometry can serve as an effective and easy way to find new candidates of superhalogen species. In order to investigate superhalogen properties of polytitanium clusters, the laser ablation mass spectrum of TiO2 was obtained with a Fourier transform ion cyclotron resonance mass spectrometer. Density functional theory calculations were also performed in this study. Species of [(TiO2)(x)(H2O)(y)OH](-) (x = 1-8, y = 1-3) were observed in the mass spectrum. Among them, the intensities of [(TiO2)(4)(H2O)OH](-), [(TiO2)4(H2O)(2)OH](-), [(TiO2)(3)(H2O)(2)OH](-), and [(TiO2)(5)(H2O)(2)OH](-) are remarkable. The structures of these species and their neutral counterparts are studied on the level of B3LYP/Lanl2dz/6-311++G(2d, 2p). Results show that the electron affinities (EAs) of the neutral clusters are all higher than that of the chlorine atom and (TiO2)(4)(H2O)(2)OH has the highest electron affinity value at 6.23 eV. This series of polytitanium superhalogens not only indicate that the OH might be applied as an effective superhalogen ligand but also show the potential of metal titanium in the design of novel superhalogen compounds.
机译:负离子质谱可以作为寻找新的超卤素物种的新候选人的有效和简便的方法。为了研究多氧化簇的过卤素特性,用傅里叶变换离子回旋谐振质谱仪获得TiO 2的激光烧蚀质谱。在本研究中也进行了密度函数理论计算。在质谱中观察到[(TiO 2)(x)(x)(x)(y)oh]( - )(x = 1-8,y = 1-3)。其中,[(TiO 2)(4)(4)(H 2 O)OH]( - ),[(TiO 2)4(H 2 O)(2)OH]( - ),[(TiO 2)(3)(H 2 O)(H 2 O)( 2)OH]( - ),和[(TiO 2)(5)(H 2 O)(2)OH]( - )是显着的。在B3LYP / LANL2DZ / 6-311 ++ G(2D,2P)的水平上研究了这些物种及其中性对应物的结构。结果表明,中性簇的电子亲和力(EAS)均高于氯原子和(TiO 2)(4)(2)(2)OH在6.23eV中具有最高电子亲和力值。该系列多硝基超卤素不仅表明OH可能被用作有效的超卤素配体,而且表明了在新型超卤素化合物的设计中的金属钛的潜力。

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