可逆光响应超分子树枝状水凝胶及与环糊精分子主客体相互作用
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- 英文论文题名：A novel reversible photo-responsive supromolecular hydrogel and "Host-Guest" interactions with Cyclodextrins(CDs)
- 论文作者：谢凡 ; 秦龙 ; 刘鸣华
- 英文论文作者：Fan Xie ; Long Qin ; Ming-Hua Liu ; Beijing National Laboratory for Molecular Science ; CAS Key Laboratory of Colloid ; Interface ; and Chemical Thermodynamics ; Institute of Chemistry ; Chinese Academy of Sciences
- 年：2016
- 作者机构：中国科学院化学研究所胶体界面与化学热力学重点实验室北京分子科学国家实验室;
- 论文关键词：树枝状小分子 ; 光响应体积相转变 ; 主客体相互作用
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十一分会：胶体与界面化学
- 语种：中文
- 分类号：O648.17;O636.12
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十一分会 ; 胶体与界面化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：323k
- 原文格式：D
- 会议级别：全国
摘要
刺激响应性超分子凝胶,在面对外界刺激,例如温度,金属离子,pH值,光及电磁场等条件,将发生可逆的凝胶-溶胶或其他相转变过程,从而用于构筑多种有趣的智能材料。基于以前报道的树枝状小分子凝胶因子OGAc与水溶性的偶氮苯分子构筑的两组分凝胶~([1]),本文将直接在树枝状分子的头基引入偶氮苯基团而设计合成了新型超分子凝胶因子AZOC_8GAc,一方面,AZOC_8GAc可以在较低浓度下形成稳定的水凝胶,在紫外及可见光调控下进行可逆的凝胶-溶胶的相转变,并伴随形貌和超分子手性(ON/OFF)的转变。另一方面,研究了AZOC_8GAc含有疏水的偶氮苯集团与不同空腔尺寸的α—/β—/γ—环糊精分子之间的主客体相互作用方式,及对AZOC8GAc凝胶体系手性传递的影响。
Stimuli-responsive supramolecular gels,which can undergo reversible Gel to Sol or other macroscopic volume phase transition upon external signal changes such as temperature,light,metal ions,electrical or magnetic field,have attracted great interests to construct as intelligent materials.Base on our previous work,the reported gelator OGAc can form two component supramolecular hydrogel with water-soluble azobenzene molecular,which displays reversible and remarkable macroscopic volume phase transition stimulated by UV-Vis light.Herein,A interesting gealtor molecular AZOC_8GAc is synthesized with hydrophobic azobenzene group direct bonding to the head of dendron(Figure 1).For one thing,the constructed compound AZOC_8GAc can gelation in extremely low concentration and have reversible microscopic volume phase transition exposed to light-stimuli proceeded with the great morphological and chiral transforms.For another,the "Host-Guest" interactions between the azobenzene head group of AZOC_8GAc and α-/β-/γ-cyclodextrins(CDs) with different cavity dimensions and the effects on the chirality transfer of AZOC_8GAc hydrogel systems are discussed in detail.
Stimuli-responsive supramolecular gels,which can undergo reversible Gel to Sol or other macroscopic volume phase transition upon external signal changes such as temperature,light,metal ions,electrical or magnetic field,have attracted great interests to construct as intelligent materials.Base on our previous work,the reported gelator OGAc can form two component supramolecular hydrogel with water-soluble azobenzene molecular,which displays reversible and remarkable macroscopic volume phase transition stimulated by UV-Vis light.Herein,A interesting gealtor molecular AZOC_8GAc is synthesized with hydrophobic azobenzene group direct bonding to the head of dendron(Figure 1).For one thing,the constructed compound AZOC_8GAc can gelation in extremely low concentration and have reversible microscopic volume phase transition exposed to light-stimuli proceeded with the great morphological and chiral transforms.For another,the "Host-Guest" interactions between the azobenzene head group of AZOC_8GAc and α-/β-/γ-cyclodextrins(CDs) with different cavity dimensions and the effects on the chirality transfer of AZOC_8GAc hydrogel systems are discussed in detail.
引文
[1]Xie,F.;Qin,L.;Liu,M.H.,Chem.Commun.,2016,52,930-933
[2]Qin,L.;Duan,P.L.;Xie,F.;Zhang L.;Liu,M.H.,Chem.Commun.,2013,49,10823-10825.
[2]Qin,L.;Duan,P.L.;Xie,F.;Zhang L.;Liu,M.H.,Chem.Commun.,2013,49,10823-10825.