第 42 卷第 3 期 | | Vol. 42 No. 3 | 2012 年 6 月 | Jun 2012 |
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所属栏目:农药及中间体
水杨醛缩芳胺类Schiff碱的无溶剂法合成及其光学性质 |
唐子龙1,2,颜 林1,2,刘汉文1,2,欧晓明2,3,李 丽1,2
(1. 湖南科技大学 化学化工学院,湖南 湘潭 411201;2. 湖南科技大学 理论化学与分子模拟省部共建教育部重点实验室,湖南 湘潭 411201;3. 湖南化工研究院,湖南 长沙 410007) |
摘 要:以水杨醛和取代苯胺为原料,在无溶剂条件下合成了一系列Schiff碱,该方法不仅收率高(82%~95%),而且反应时间短,对环境污染少。用1H NMR、13C NMR和IR等对产物结构进行了确证。同时还研究了这类Schiff碱的紫外和荧光性质,化合物均具有较强的荧光发射光谱,发射峰值波长(λem)在470~524 nm。当苯环邻、对位引入供电子基时,发射波长明显红移,而当间位引人供电子基时,发射波长蓝移。苯环上引入吸电子取代基时,发射波长蓝移。 |
关键词:无溶剂法;Schiff碱;合成;荧光;紫外 |
中图分类号:O623.731 文献标识码:A 文章编号:1009-9212(2012)03-0026-05 |
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Solvent-free Synthesis and Optical Properties of Schiff Bases Derived from Salicylaldehyde and Substituted Anilines |
TANG Zi-long1,2,YAN Lin1,2,LIU Han-wen1,2,OU Xiao-ming2,3,LI Li1,2
(1. College of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;2. Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education,Hunan University of Science and Technology,Xiangtan 411201,China;3. Hunan Research Institute of Chemical Industry,Changsha 410007,China) |
Abstract:A series of Schiff bases were synthesized in 82%~95% yields from salicylaldehyde and substituted anilines in solvent-free systems. All the obtained compounds were characterized with 1H NMR,13C NMR and IR. Their UV-Vis and fluorescent properties were also studied,which demonstrated that the Schiff bases showed stronger fluorescence intensity at em = 470~524 nm. When an electron-donating group was introduced at the ortho- or para- position on the benzene ring,a red-shifted em was observed,while at the meta- position induced a blue-shifted em. When an electron-withdrawing group was introduced onto the benzene ring,a blue-shifted emwas observed. |
Key words:solvent-free;Schiff base;synthesis;fluorescence;ultraviolet |
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基金项目: 国家科技支撑计划项目子课题(2011BAE06B01),湖南省教育厅重点项目(No.10A034)、湖南省自然科学基金项目(11JJ3016),理论化学教育部重点实验室开放基金课题(LKF1103)。
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作者简介:唐子龙(1967-),男,湖南邵阳人,副教授,博士,从事有机合成研究。(E-mail:zltang67@yahoo.com.cn)
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收稿日期:2012-05-1
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