基于β-环糊精包合的激基缔合荧光  

Excimer Emission Based onβ-cyclodextrin Inclusion Complex

作　　者：孙榕蔓 陈娇 张译之 王恩举[1] SUN Rongman;CHEN Jiao;ZHANG Yizhi;WANG Enju(College of Chemistry and Chemical Engineering,Hainan Normal University,Haikou 571158,China)

机构地区：[1]海南师范大学化学与化工学院,海南海口571158

出　　处：《海南师范大学学报（自然科学版）》2024年第2期152-157,共6页Journal of Hainan Normal University（Natural Science）

基　　金：海南省大学生创新训练计划项目(S202311658017);海南省自然科学基金项目(222MS059)。

摘　　要：激基缔合荧光具有发射谱带宽、斯托克斯位移大的特点,在传感、检测、成像及照明等方面具有广泛应用。本文提出了一个基于β-环糊精(β-CD)包合作用构建激基缔合发光体的新方法。通过多环芳醛(蒽醛和芘醛)与金刚烷胺缩合合成了2个席夫碱(ANAD和PYAD),二者都显示激基缔合增强的聚集诱导发光。席夫碱的金刚烷基与β-CD的疏水空腔高度匹配,与β-CD形成包合物后荧光性质会发生明显变化。在β-CD水溶液中,ANAD的发射光谱与β-CD浓度密切相关,当c(ANAD)∶c(β-CD)为1∶2时观察到明显的激基缔合发射。与ANAD不同,PYAD在各种浓度的β-CD水溶液中都发射激基缔合荧光,但过量的β-CD使荧光强度有所减弱。在固态下,ANAD和PYAD几乎没有荧光,与β-CD形成包合物后,二者都显示强激基缔合发射。总之,与β-CD形成包合物更有利于发射激基缔合荧光。The excimer emission has been widely used in sensing,detection,imaging and illumination because of its broad emission bandwidth and large Stokes shift.In this work,a new strategy based on the formation of inclusion complexes withβ-CD was proposed for the construction of excimer emission luminophores.Two Schiff bases were synthesized by conjugating anthraldehyde/pyrenealdehyde with 1-amantadine.Both of them showed excimer-enhanced aggregaton emissiom.The adamantyl group of Schiff base perfectly matched with the hydrophobic cavity ofβ-CD,and the emission properties of Schiff base obviously changed after forming the inclusion complex withβ-CD.In H2O,the emission of ANAD was dependent on the concentrations ofβ-CD.The excimer emission was observed only when c(ANAD)∶c(β-CD)was 1∶2.Being different from ANAD,PYAD always showed the excimer emission under any circumstances,but the emission intensity was weakened by the excessβ-CD.ANAD and PYAD in solid state exhibited non-fluorescence.When included byβ-CD,both of them exhibited intense excimer emission.In short,the formation of inclusion complex withβ-CD was favorable to excimer emission.

关 键 词：蒽 芘 金刚烷 Β-环糊精 激基缔合物 

分 类 号：O625.6[理学—有机化学]