高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (10): 20230171.doi: 10.7503/cjcu20230171

• 有机化学 • 上一篇    下一篇

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

李卓, 孙冬冬, 韩勰, 刘思敏()   

  1. 武汉科技大学化学与化工学院, 武汉 430081
  • 收稿日期:2023-04-01 出版日期:2023-10-10 发布日期:2023-05-09
  • 通讯作者: 刘思敏 E-mail:liusimin@wust.edu.cn
  • 基金资助:
    国家自然科学基金(21871216)

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

LI Zhuo, SUN Dongdong, HAN Xie, LIU Simin()   

  1. School of Chemistry and Chemical Engineering,Wuhan University of Science and Technology,Wuhan 430081,China
  • Received:2023-04-01 Online:2023-10-10 Published:2023-05-09
  • Contact: LIU Simin E-mail:liusimin@wust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21871216)

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.

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

Abstract:

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 spectroscopy, 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 intermolecular π-π interaction 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.

Key words: Mechanochromic luminescence, 9, 10-Divinylanthracene derivative, Cucurbit[n]uril, Host-guest interaction, π-π Interaction

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