| 孙榕蔓, 陈娇, 张译之, 王恩举.基于β环糊精包合的激基缔合荧光[J].海南师范大学学报自科版,2024,37(2):152-157 |
| 基于β环糊精包合的激基缔合荧光 |
| Excimer Emission Based on β-cyclodextrin Inclusion Complex |
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| DOI：10.12051/j.issn.1674-4942.2024.02.003 |
| 中文关键词: 蒽 芘 金刚烷 -环糊精 激基缔合物 |
| 英文关键词: anthracene pyrene adamantine -cyclodextrin excimer |
| 基金项目: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） |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 with β-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 of β-CD, and the emission properties of Schiff base obviously changed after forming the inclusion complex with β-CD. In H2O, the emission of ANAD was dependent on the concentrations of β-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 excess β-CD. ANAD and PYAD in solid state exhibited non-fluorescence. When included by β-CD, both of them exhibited intense excimer emission. In short, the formation of inclusion complex with β-CD was favorable to excimer emission. |
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