Infrared spectroscopy of small size-selected water clusters
Infrared spectroscopy of small size-selected water clusters
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DOI：
10.1063/1.470871
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发表时间：
1996-01-01
影响因子：
4.4
通讯作者：
Kulcke, A
中科院分区：
文献类型：
--
作者：
Huisken, F;Kaloudis, M;Kulcke, A
用红外分子束耗尽和碎片光谱研究了水分子团簇[（H_2O）（n），n = 2，3，4，5]的吸收行为。在3300 ~ 3800 cm（-1）的光谱区域用注入种子光参量振荡器覆盖。通过用二次氦束分散团簇光束并测量作为散射角的函数的耗尽，获得了特定尺寸的信息。三个吸收带可归属于水二聚体（H2O）（2），结合的OH伸缩位于3601 cm（-1）处。对于具有环状结构的每个较大的水团簇（n = 3，4，5），可以识别两个吸收带，一个属于自由OH伸缩，另一个是由于OH环振动的激发。对自由水团簇的测量得到了对大氩团簇上形成的小水络合物的研究的补充。在这些光谱中观察到的吸收带的位置是接近的（H2O）（n）在氩矩阵中发现的。(C)1996年美国物理学会。
Infrared molecular beam depletion and fragment spectroscopy has been employed to study the absorption behavior of small water clusters [(H2O)(n), n = 2,3,4,5]. The spectral region between 3300 and 3800 cm(-1) was covered with an injection-seeded optical parametric oscillator Size-specific information has been obtained by dispersing the cluster beam with a secondary helium beam and measuring the depletion as a function of the scattering angle. Three absorption bands could be assigned to the water dimer (H2O)(2), with the bonded OH stretch being localized at 3601 cm(-1). For each of the larger water clusters (n = 3,4,5), which have cyclic structures, two absorption bands could be identified, one belonging to the free OH stretch and the other being due to the excitation of the OH ring vibration. The measurements on free water clusters were complemented by studies on small water complexes formed on large argon clusters. The positions of the absorption bands observed in these spectra are close to those found for (H2O)(n) in argon matrices. (C) 1996 American Institute of Physics.