An aromatic micelle with bent pentacene-based panels: encapsulation of perylene bisimide dyes and graphene nanosheets
An aromatic micelle with bent pentacene-based panels: encapsulation of perylene bisimide dyes and graphene nanosheets
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DOI：
10.1039/d0sc01748e
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发表时间：
2020-07-14
期刊：
影响因子：
8.4
通讯作者：
Yoshizawa, Michito
中科院分区：
文献类型：
--
作者：
Ito, Kenta;Nishioka, Tomoya;Yoshizawa, Michito
为了开发一类新型的芳香族胶束，我们通过狄尔斯 - 阿尔德反应合成了一种基于弯曲并五苯的两亲分子。带有两个三甲基铵链的两亲分子在室温下于水中组装成平均核直径为1.5纳米的球形芳香族胶束。这种新型芳香族胶束能在水中有效地包封苝酰亚胺（PBI）染料和石墨烯纳米片（GNS）。被包封的PBI染料形成平行堆叠的二聚体，呈现出特征吸收和发射谱带。此外，被包封的GNS由平均横向尺寸约为7纳米的少层石墨烯片组成，这已通过拉曼光谱证实。所得到的水相主 - 客体复合物即使在环境条件下于水中放置三周后仍然稳定。
For exploitation of a new class of aromatic micelles, we synthesized a bent pentacene-based amphiphilic molecule through Diels-Alder reaction. The amphiphiles bearing two trimethylammonium tethers assemble into a spherical aromatic micelle, with an average core diameter of 1.5 nm, in water at room temperature. The new aromatic micelle efficiently encapsulates perylene bisimide (PBI) dyes and graphene nanosheets (GNS) in water. The encapsulated PBI dyes form a parallel stacked dimer, exhibiting characteristic absorption and emission bands. In addition, the encapsulated GNS are composed of few-layer graphene sheets with an average lateral size of similar to 7 nm, as confirmed by Raman spectroscopy. The resultant, aqueous host-guest complexes are stable even after three weeks in water under ambient conditions.