葫芦[n]脲主体对二乙烯基蒽类衍生物力致变色性质的影响  

Effects of Cucurbit[n]uril Hosts on Mechanochromic Properties of Divinylanthracene Derivatives

作　　者：李卓 孙冬冬 韩勰 刘思敏 LI Zhuo;SUN Dongdong;HAN Xie;LIU Simin(School of Chemistry and Chemical Engineering,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学化学与化工学院,武汉430081

出　　处：《高等学校化学学报》2023年第10期120-127,共8页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21871216,21901194)资助。

摘　　要：设计合成了3种9,10-二乙烯基蒽衍生物G1~G3;通过紫外-可见光谱、荧光光谱、核磁共振波谱和质谱等表征手段,研究了其作为客体分子与葫芦[n]脲(CB[n]s, n=8, 10)主体的主客体识别过程及主客体作用对其力致变色(MCL)性能的影响.研究结果表明, CB[8]和CB[10]可分别与客体分子形成摩尔比为2∶2和1∶2的主客体包合物,被包合的客体分子间π-π相互作用得以增强.与自由客体分子相比,主客体包合物的荧光发射产生了显著红移(>100 nm),研磨处理使得包合物的荧光发射进一步红移.此外,不同的葫芦[n]脲对客体分子的MCL性能的影响也有所区别.本文揭示了主客体作用对MCL材料变色性能的影响,为进一步设计基于主客体作用的新型MCL材料提供了新思路.Three 9,10-divinylanthracene derivatives(G1—G3)were designed and synthesized in this work.The host-guest complexation of those derivatives with cucurbit[n]urils(CB[n]s,n=8,10)host and the effects of host-guest interaction on their mechanochromic luminescent(MCL)properties were studied by means of UV-Vis spec-troscopy,fluorescence spectroscopy,nuclear magnetic resonance(NMR)and mass spectrometries.The results showed that CB[8]and CB[10]could form 2∶2 and 1∶2 inclusion complexes with guest molecules,respectively,with the enhancement of intermolecularπ-πinteraction of included molecules.Compared with free guest molecules,the fluorescence emissions of the host-guest complexes exhibited a significant red-shift(>100 nm)and further red-shift after grinding.The results also showed that the effects of different CB[n]s on the MCL properties of guest molecules differ.This study disclosed the effect of CB[n]-based host-guest interaction on the MCL properties of guest molecules,further providing a new way for the construction of novel MCL materials.

关 键 词：力致变色 9 10-二乙烯基蒽衍生物 葫芦[n]脲 主客体作用 Π-Π相互作用 

分 类 号：O625.1[理学—有机化学]