Far ultraviolet solution spectroscopy of the iodide ion
Far ultraviolet solution spectroscopy of the iodide ion
复制标题
碘离子的远紫外溶液光谱
DOI：
--
复制
发表时间：
1977
期刊：
影响因子：
--
通讯作者：
E. Hayon
中科院分区：
文献类型：
--
作者：
M. Fox;E. Hayon
碘离子的远紫外吸收光谱已在大范围的溶剂和大的温度范围内进行了研究。其中包括相对于水和 D2O 具有强蓝移和红移溶剂。已观察到许多新的吸收带，在某些情况下可低至 165 nm。观察到的吸收光谱是由重叠吸收带组成的包络，这些吸收带已被解析，主要使用对数正态（不对称）带形状，以显示标记为 A1/A2、B1/B2 等的带对组。第一个特征电荷转移至溶剂 (c.t.t.s.) 双峰 A1/A2 的分离接近气相中碘自由基 2P 原子态的双峰分裂。 B1B2 较高能量的双峰带具有稍小的间隔并且具有 c.t.t.s。高溶剂和温度敏感性等特性。在更高的能量下观察到更多的谱带。观察到的能带系统在溶剂位移、双峰能带分裂、振荡器强度和温度系数的基础上相互关联。 c.t.t.s。高能带的特征已得到评估并提出了初步分配建议。
The far ultraviolet absorption spectra of iodide ion have been studied in a large range of solvents and over a large temperature range. These include both strong blue- and red-shifting solvents relative to water and D2O. A number of new absorption bands have been observed, in some cases down to 165 nm. The observed absorption spectra are envelopes composed of overlapping absorption bands which have been resolved, using mainly lognormal (asymmetric) band shapes, to show sets of band pairs labelled A1/A2, B1/B2etc. The first characteristic charge-transfer-to-solvent (c.t.t.s.) doublet, A1/A2, has a separation close to the doublet splitting of the 2P atomic states of the iodine radical in the gas phase. The B1B2 higher energy doublet bands have a slightly smaller separation and have c.t.t.s. character such as high solvent and temperature sensitivities. At higher energies further bands are observed. The band systems observed have been correlated on the basis of solvent shifts, doublet band splittings, oscillator strengths and temperature coefficients. The c.t.t.s. character of the higher energy bands has been evaluated and tentative assignments suggested.