β-环糊精包覆作用下的肼二水杨腙聚集诱导发光研究

Study on the aggregation induced emission of salicylaldhyde azine under the encapsulation of beta cyclodextrin

水杨醛和联肼通过一步反应制得聚集诱导发光分子—肼二水杨腙,利用紫外-可见吸收光谱、荧光光谱和纳米粒度分析对β-环糊精(CD)对肼二水杨腙的包覆过程进行了研究。结果显示,β-CD对肼二水杨腙具有明显的包覆作用,紫外吸收光谱显示在不良溶剂水,以及在0.1 mL良溶剂DMF的存在下,β-环糊精(CD)均可包覆肼二水杨腙分子。荧光光谱表明,β-CD包覆作用会直接减缓AIE分子聚集,使荧光强度下降;同时,肼二水杨腙分子与β-CD空腔尺寸更匹配,表现在β-CD包覆肼二水杨腙分子后荧光强度降至59.5%,下降幅度大于α-CD(69.5%)。

Salicylaldhyde azine,an aggregation-induced luminescent molecule,was synthesized from salicylaldehyde and hydrazine in one step reaction.The encapsulation process of salicylaldhyde azine by β-cyclodextrin(CD)was studied by ultraviolet-visible absorption spectroscopy,fluorescence spectroscopy and nanoparticle size analysis.The results showed that the inclusion effect of β-CD on salicylaldhyde azine was obvious.UV absorption spectra showed that in the presence of undesirable solvent water and 0.1 mL DMF,β-cyclodextrin(CD)encapsulated salicylaldhyde azine molecule.Fluorescence spectra showed that the inclusion effect of β-CD could directly slow down the aggregation of AIE molecule and decrease the fluorescence intensity.Meanwhile,the molecular size of salicylaldhyde azine matched the cavity size of β-CD,the fluorescence intensity of salicylaldhyde azine encapsulated with beta-CD decreased to 59.5%,which was greater than that of alpha-CD(69.5%).