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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Photoelectron Angular Distributions as Probes of Cluster Anion Structure: I~?·(H_2O)_2 and I~?·(CH_3CN)_2
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Photoelectron Angular Distributions as Probes of Cluster Anion Structure: I~?·(H_2O)_2 and I~?·(CH_3CN)_2

机译:作为团簇阴离子结构探针的光电子角分布:I〜?·(H_2O)_2和I〜?·(CH_3CN)_2

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摘要

The use of photoelectron angular distributions to provide structural details of cluster environments is investigated. Photoelectron spectra and angular distributions of I~?·(H_2O)~2 and I?·(CH_3CN)_2 cluster anions are recorded over a range of photon energies. The anisotropy parameter (β) for electrons undergoes a sharp change (Δβ_(max)) at photon energies close to a detachment channel threshold. I~?·(H_2O)_2 results show the relationship between dipole moment and Δβ_(max) to be similar to that observed in monosolvated I? detachment. The Δβ_(max) of the 4.0 eV band in the I?·(CH_3CN)_2 photoelectron spectrum suggests a dipole moment of 5?6 D. This is consistent with predictions of a hydrogen bonded conformer of the I?·(CH_3CN)_2 cluster anion [Timerghazin, Q. K.; Nguyen, T. N.; Peslherbe, G. H. J. Chem. Phys. 2002, 116, 6867?6870].
机译:研究了使用光电子角分布来提供簇环境的结构细节。在一定的光子能量范围内记录了I〜?·(H_2O)〜2和I〜·(CH_3CN)_2簇阴离子的光电子能谱和角分布。电子的各向异性参数(β)在接近分离通道阈值的光子能量处发生急剧变化(Δβ_(max))。 I〜?·(H_2O)_2结果表明偶极矩与Δβ_(max)的关系与单溶剂化I?中观察到的相似。分离。 I?·(CH_3CN)_2光电子能谱中4.0 eV带的Δβ_(max)表明偶极矩为5?6D。这与I?·(CH_3CN)_2的氢键构象构象的预测相符。簇阴离子[Timerghazin,QK; Nguyen,T。N .; Peslherbe,G.H.J.Chem。物理2002,116,6867?6870]。

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