化学学报 ›› 1996, Vol. 54 ›› Issue (8): 734-741. 上一篇    下一篇

研究论文

溶致变色法测算线型有机汞化合物的分子二阶极化率(β)

张孝义;吴向东;秦金贵;刘道玉   

  1. 武汉大学化学系
  • 发布日期:1996-08-15

Solvatochromic method for determination of the second order molecular susceptibility, β, of linear organomercury compounds

ZHANG XIAOYI;WU XIANGDONG;QIN JINGUI;LIU DAOYU   

  • Published:1996-08-15

本文报道采用溶致变色法测试12个直线型芳基对硝基苯乙炔基汞化合物(1~12)的分子二阶极化率(β)。测试结果发现, 这些化合物的β值为10^-^2^9esu数量级, 其数值大小与取代基D的电子性质并无直接的关系, 表明从D到NO2并未发生有效的分子内电荷转移。这些化合物的电子吸收光谱中, λmax位于310±7nm范围内, 与具有相近β值的一些有机分子相比, λmax紫移了60nm以上。初步讨论了溶致变色法测试金属有机化合物的β值的适用条件和局限性。

关键词: 紫外分光光度法, 红外分光光度法, 元素分析, 质谱法, 核磁共振谱法, 硝基苯 P, 苯乙炔, 极化率, 有机汞化合物, 溶致变色法

The second order molecular susceptibility, β, of twelve arylmercuric nitrophenylacetylides which possess a linear molecular configuration has been determined with solvatochromism technique to be in the order of 10^-^2^9esu. There is no close relationship between the electronic property of the substituent (D) and the value of β, indicating that an effective intramolecular charge-transfer from D to nitro group does not exist. λmax of all the compounds in electronic spectra are in the range of 310±7nm, which are over 60nm shorter than those of some other conjugated organic molecules which possess similar β value. The condition and limitation of using this technique to determine β of organometallic molecules are discussed.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, INFRARED SPECTROPHOTOMETRY, ELEMENTAL ANALYSIS, MASS SPECTROGRAPHY, NMR SPECTROMETRY, NITROBENZENE P, PHENYL ACETYLENE, POLARIZABILITIES, ORGANO-MERCURIC COMPOUND

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