两种溴代水杨醛基单双Schiff碱衍生物的合成及变色发光性能研究  

Synthesis and luminescence properties of two Schiff bases with brominesalicylaldehyde group

作　　者：江道勇[1] 高蕊[1] 孔翔飞[1] 李光华[1] 丁国华[1] 

机构地区：[1]桂林理工大学、广西矿冶与环境科学实验中心、化学与生物工程学院,广西桂林541004

出　　处：《化学研究与应用》2014年第12期1864-1874,共11页Chemical Research and Application

基　　金：国家自然科学基金项目(21166006)资助;广西矿冶与环境科学实验中心项目(批准号:KH2013ZD003)资助

摘　　要：以3,5-二溴-2-羟基苯甲醛和1,2-二氨基乙烷、3-氨基苯甲酸为原料,合成了两种化合物N,N'-双3,5-二溴-2-羟基苯甲醛缩1,2-二氨基乙烷(DBSE)和N-3,5-二溴-2-羟基苯甲醛缩3-氨基苯甲酸(DBSA)。利用核磁共振氢谱、质谱、红外光谱和元素分析对目标化合物的结构进行了表征,通过紫外-可见吸收光谱、荧光光谱测定了其发光性能,另外通过TG-DTG测定了其热稳定性能。结果表明:目标化合物DBSE为蓝绿光发射,DBSA为紫色光发射;目标化合物的热分解温度均达260℃以上,具有良好的热稳定性;在254 nm紫外光照射不同时间下、不同的温度下、不同的极性溶剂中、不同浓度的Co2+离子滴定的情况中,目标化合物均表现出了一定的变色发光性能,整体来看DBSE的光致变色性能优于DBSA,而热致变色性能DBSA优于DBSE。Condensation of 1,2-diaminoethane and 3-aminobenzoic acid with 3,5-dibromo-2-hydroxybenzaldehyde respectively yiel-ded two target compounds,from N,N-ethylene-bis（3,5-dibromosalicylideneimine） （ DBSE） and N-3,5-dibromine-salicylaldehyde-m-aminobenzoic acid（ DBSA） . The compounds had been characterized by elemental analysis, MS, IR and 1 H NMR spectra. The thermal stability of compounds were investigated and the TG-DTG showed that the compounds had better performance in thermal stability and the decomposition temperature（ Td ） were all up to 260℃. Furthermore,the luminescent properties were evaluated by UV-Visible absorption spectrum and fluorescence spectrum. DBSE was blue-green luminescence and DBSA was violet lumines-cence. The results also indicated that the target compounds exhibited certain photochromic and thermochromic properties under the conditions of 254 nm UV light and different temperatures;the different polar solvents and different concentrations of Co2＋ion were also influenced on the luminescent properties. In general,the photochromic property of DBSE was superior to DBSA,but the thermo-chromic property was opposite.

关 键 词：光致变色 热致变色 溶剂效应 Co2+光谱滴定 

分 类 号：O626.4[理学—有机化学]