Photoelectron imaging of large anionic methanol clusters:: (MeOH)n- (n∼70-460)
Photoelectron imaging of large anionic methanol clusters:: (MeOH)n- (n∼70-460)
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DOI：
10.1063/1.2355484
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发表时间：
2006-11-07
影响因子：
4.4
通讯作者：
Neumark, Daniel M.
中科院分区：
文献类型：
--
作者：
Kammrath, Aster;Verlet, Jan R. R.;Neumark, Daniel M.
用光电子像研究了甲醇阴离子团簇（MeOH）（n）（-）（n = 70-460）中的电子溶剂化。观察到两种异构体：甲醇I，垂直结合能（VBE）范围为2- 2.5eV，和甲醇II，VBE低得多，在0.2和0.5eV之间。两种异构体的VBE与n（-1/3）成线性关系，斜率几乎相同。我们建议，过量的电子是内部溶剂化在甲醇I集群，而在甲醇II中，它驻留在一个偶极结合的表面状态。对于甲醇I，观察到在1.55 eV处可达到的激发态的证据。(c)2006年，美国物理学会。
Electron solvation in methanol anion clusters, (MeOH)(n)(-) (n similar to 70-460), is studied by photoelectron imaging. Two isomers are observed: methanol I, with vertical binding energies (VBE) ranging from 2-2.5 eV, and methanol II, with much lower VBE's between 0.2 and 0.5 eV. The VBE's of the two isomers depend linearly on n(-1/3) with nearly identical slopes. We propose that the excess electron is internally solvated in methanol I clusters, whereas in methanol II it resides in a dipole-bound surface-state. Evidence of an excited state accessible at 1.55 eV is observed for methanol I. (c) 2006 American Institute of Physics.