作者：何书美

作者单位：河北师范大学分析测试中心, 河北 石家庄 050024

关键词：无机含氧酸盐; 硝酸盐; 红外光谱; 拉曼光谱; 伸缩振动; 弯曲振动

摘要：

无机含氧酸盐含多个成键轨道和键结构,具有明显的红外-拉曼光谱特征。该文对常见的硫酸盐、硝酸盐、碳酸盐及磷酸盐进行红外和拉曼光谱测试。结果表明:同一状态下,受金属阳离子的影响,同一酸根的拉曼特征谱带均随原子序数的增大向低波数位移;酸根中非金属元素与氧原子之间的电子云分布的不均等性在红外光谱中有明显体现。以一价金属阳离子的硝酸盐为例,对其4种简正振动模式进行红外和拉曼谱带归属,研究了一价金属阳离子对酸根结构的影响。

Study effects of metal cations on oxygen acid structure with fourier transform infrared-raman spectroscopy

HE Shu-mei

Testing and Analysis Center, Hebei Normal University, Shijiazhuang 050024, China

Abstract: Inorganic oxysalts have multiple bonding orbits and π bond structure, and with the evident characteristic of infrared and Raman spectra. General sulfates, nitrates, carbonates and phosphates have been measured by the infrared and Raman spectra. The results show that the characteristic bands of Raman spectra for the acid radical shift to lower wavenumber with the increase of the atomic number under the same condition which affected by the metal cation. And the unequal character of the distribution of electron cloud between non-metallic element and oxygen atom in acid radical was obviously displayed in IR spectrum. With the nitrate as an example, the authors have studied the IR and Roman spectra of the four normal vibrations. And how the structure of nitrate ions influenced by univalent metallic cations is also discussed.

Keywords: inorganic oxysalt; nitrate; IR; Raman; stretching vibration; bending vibration

2014, 40(1): 40-42  收稿日期: 2012-11-27;收到修改稿日期: 2013-1-15

基金项目: 国家自然科学基金项目(21073053)

作者简介: 何书美(1964-),女,副教授,硕士,主要从事化学分析和分子光谱分析。

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