Chameleonic, Light Harvesting Photonic Gels Based on Orthogonal Molecular Fibrillization
Chameleonic, Light Harvesting Photonic Gels Based on Orthogonal Molecular Fibrillization
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DOI：
10.1021/acs.chemmater.6b03137
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发表时间：
2016-11-08
影响因子：
8.6
通讯作者：
Miravet, Juan F.
中科院分区：
文献类型：
--
作者：
Felip-Leon, Caries;Diaz-Oltra, Santiago;Miravet, Juan F.
报道了由两个正交自组装纤维网络组成的智能光子凝胶的制备。分子胶凝剂是衍生自4-氨基-1，8-萘酰亚胺的光受体和基于吖啶的能量供体。两种发色团的纤维状正交组装是观察到光捕获的必要条件，其导致在吖啶衍生的供体的照射后从基于萘酰亚胺的受体发射，具有约500 nm的显著斯托克斯位移。200纳米。能量转移是目前在乙腈中的分子凝胶和固体干凝胶的形式，并有效地可视化荧光光谱和共聚焦激光扫描显微镜。变色龙的刺激响应行为与吖啶衍生物形成的凝胶网络可以通过温度变化或化学物质选择性地分解的事实有关。例如，可以通过分别添加HCl或NaOH来关闭/打开光捕获过程，从而提供新型的刺激响应性光子软材料。
The preparation of smart photonic gels composed of two orthogonally self assembled fibrillar networks is reported. The molecular gelators are a light acceptor derived from 4-amino-1,8-naphthalimide and an acridine-based energy donor. Fibrillar orthogonal assembly of both chromophores is a requisite for light harvesting to be observed which results in emission from the naphthalimide-based acceptor upon irradiation of the acridine-derived donor with a significant Stokes shift of ca. 200 nm. Energy transfer is present both in the form of molecular gels in acetonitrile and in the solid-like xerogels and efficiently visualized both by fluorescence spectroscopy and confocal laser scanning microscopy. The chameleonic, stimuli responsive behavior is linked to the fact that the gel network formed by the acridine derivative can be selectively disassembled by means of temperature changes or chemical species. For example, the light harvesting process can be switched off/on by addition of HCl or NaOH respectively, affording a new type of stimuli responsive photonic soft materials.