Mass-selected "matrix isolation'' infrared spectroscopy of the I-.(H2O)2 complex:: making and breaking the inter-water hydrogen-bond

被引：136

作者：

Ayotte, P ^{[1
]}

Weddle, GH ^{[1
]}

Kim, J ^{[1
]}

Johnson, MA ^{[1
]}

机构：

[1] Yale Univ, Sterling Chem Lab, New Haven, CT 06520 USA

来源：

CHEMICAL PHYSICS | 1998年 / 239卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0301-0104(98)00287-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Infrared spectra of the cold I-. W and I-. W-2 clusters are reported via vibrational predissociation spectroscopy of the argon solvated species, I-. W-n.Ar-m, in the OH stretching region. Several argon atoms serve to significantly simplify the spectra by collapsing complex band contours into sharp features at the vibrational origins. This effect, in addition to the substantial cooling afforded by argon solvation, dramatically change the appearance of the bare dihydrate spectrum reported earlier [P. Ayotte, C.G. Bailey, G.H. Weddle, M.A. Johnson, J. Phys. Chem. A 102 (1998) 3067]. The cold spectrum consists of a simple four line pattern anticipated by ab initio calculations for the asymmetric structure where the two waters are bound together on one side of the ion. The dramatic changes in the spectrum of the argon complex relative to that of bare I-. W-2 are readily interpreted to be a consequence of internal energy in the latter leading to rupture of the inter-solvent H-bond. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：485 / 491

页数：7

共 45 条

[1] HYDRATION OF HALIDE NEGATIVE IONS IN GAS PHASE .2. COMPARISON OF HYDRATION ENERGIES FOR ALKALI POSITIVE AND HALIDE NEGATIVE IONS [J].