摘要
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^(-29)esu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NO_2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,λ_(max)位于310±7nm范围内,与具有相近β值的一些有机分子相比,λ_(max)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.
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 10-29 esu. There is no close relationship betweenthe electronic property of the substituent (D) and the value of β, indicating that an effectiveintramolecular charge-transfer from D to nitro group does not exist. λmax of all the compounds inelectronic spectra are in the range of 310±7nm, which are over 60nm shorter than those of someother conjugated organic molecules which possess similar β value. The condition and limitation of using this technique to determine 8 of organometallic molecules are discussed.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1996年第8期734-741,共8页
Acta Chimica Sinica
基金
国家攀登计划
国家自然科学基金资助课题
