Color-tunable fluorescent organogels: columnar self-assembly of pyrene-containing oligo(glutamic acid)s.
Color-tunable fluorescent organogels: columnar self-assembly of pyrene-containing oligo(glutamic acid)s.
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DOI：
10.1021/la061581u
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发表时间：
2007-01
期刊：
影响因子：
--
通讯作者：
Y. Kamikawa;Takashi Kato
中科院分区：
文献类型：
--
作者：
Y. Kamikawa;Takashi Kato
合成了一种新型的含芘基团和树枝状低聚肽的荧光凝胶剂。这些分子自组装成一维螺旋柱状结构，从而形成三维纤维随机网络。由于寡肽的氢键排列极大地抑制了芘异构体的形成，因此所得到的凝胶材料显示了芘的单体发射。相反，在溶胶态，由于分子间氢键的解离，观察到了吡喃的绿色准分子发射。这是第一个用于超分子芘组件的荧光反向模式颜色切换的例子。
New fluorescent gelators containing pyrene moieties and dendritic oligopeptides have been developed. These molecules self-assemble into 1D helical columnar structures that lead to the formation of 3D fibrous random networks. The resulting gel materials show monomer emission of pyrenes because the hydrogen-bonded array of the oligopeptide moieties greatly suppresses the formation of pyrene excimers. In contrast, in the sol states green excimer emission of the pyrenes is observed because of the dissociation of intermolecular hydrogen bonds. This is the first example of the reverse-mode color switching of fluorescence for supramolecular pyrene assemblies.