Ultraviolet absorption spectra of iodine, iodide ion and triiodide ion

被引：0

作者：

Wei, YJ ^{[1
]}

Liu, CG ^{[1
]}

Mo, LP ^{[1
]}

机构：

[1] Hebei Normal Univ, Coll Chem, Shijiazhuang 050016, Peoples R China

来源：

SPECTROSCOPY AND SPECTRAL ANALYSIS | 2005年 / 25卷 / 01期

关键词：

iodine; iodide ion; triiodide ion; ultraviolet absorption spectrum; molar absorptivity;

D O I：

暂无

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Ultraviolet absorption spectra of iodine I-2, iodide ion I- and triiodide ion I-3(-) were studied, and molar absorptivities of these species were determined. Absorption spectrum Of 12 aqueous solution appears as an absorption peak at 203 rim with a molar absorptivity of 1.96 X 10(4 .) L (.) mol(-1 .) cm(-1). Absorption speartrum of I- appears as two absorption peaks at 193 and 226 nm with molar absorptivities of 1.42 X 10(4) and 1.34 X 10(4) L (.) mol(-1) (.) cm(-1), respectively. When I-2 aqueous solution is mixed with KI solution, two absorption peaks appear at 288 and 350 rim, respectively, indicating the formation of I-3(-). Using saturation method, molar absorptivities of 13 at 288 and 350 nm were determined to be 3.52 X 10(4) and 2.32 X 10(4) L (.) mol(-1) (.) cm(-1), respectively.

引用

页码：86 / 88

页数：3