Hierarchical self-assembly of amino acid derivatives into stimuli-responsive luminescent gels
Hierarchical self-assembly of amino acid derivatives into stimuli-responsive luminescent gels
复制标题
氨基酸衍生物分层自组装成刺激响应发光凝胶
DOI：
10.1039/c4sm01613k
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发表时间：
2014-01-01
期刊：
影响因子：
3.4
通讯作者：
Fan, Xiaolin
中科院分区：
文献类型：
--
作者：
Li, Yibao;Cheng, Linxiu;Fan, Xiaolin
在这项研究中，通过层次自组装，从氨基酸功能化的苝衍生物和4,4'-联吡啶基单元之间的两个组分获得了独特的发光凝胶。通过紫外光谱（UV）、荧光光谱、扫描电镜（SEM）和激光扫描共聚焦显微镜（LSCM）对该发光凝胶进行了研究，结果表明该凝胶具有较强的荧光强度。为了进一步揭示自组装驱动力，利用扫描隧道显微镜（STM）研究了高取向热解石墨（HOPG）衬底固液界面处的二维（2D）自组装行为，结果表明，驱动驱动力归因于分子间氢键和pi-pi堆叠相互作用。根据相互作用模式，发现这些有机凝胶剂通过加入三乙胺可以快速从凝胶转化为溶液。
In this study, unique luminescent gels have been obtained from two components between amino acid functionalized perylene derivatives and 4,4'-bipyridyl units via hierarchical self-assembly. The luminescent gels have been investigated by means of ultraviolet spectra (UV), fluorescence spectra, Scanning Electron Microscopy (SEM) and Laser Scanning Confocal Microscopy (LSCM), which illustrate the strong fluorescence intensity of the gels. In order to further reveal the self-assembly driving forces, the two-dimensional (2D) self-assembly behaviours have been studied by scanning tunneling microscopy (STM) on a highly oriented pyrolytic graphite (HOPG) substrate at the solid-liquid interface, which indicates that the driving forces are attributed to the intermolecular hydrogen bonding and pi-pi stacking interactions. According to the interaction mode, these organogelators are found to rapidly transform from gels to solutions by adding triethylamine.