化学
发光
水溶液
自组装
分子内力
手性(物理)
纳米棒
四氢呋喃
纳米材料
荧光
溶剂
圆二色性
光化学
组合化学
纳米技术
结晶学
立体化学
有机化学
材料科学
光电子学
物理
量子力学
手征对称破缺
Nambu–Jona Lasinio模型
夸克
作者
Jinhui Jiang,Fulong Ma,Ronglu Dong,Siwei Zhang,Zicong Zhang,Haozhe Tan,Xu‐Min Cai,Zijie Qiu,Yu Xiong,Wei Han,Zheng Zhao,Ben Zhong Tang
摘要
Remarkable advances have been achieved in solution self-assembly of polypeptides from the perspective of nanostructures, mechanisms, and applications. Despite the intrinsic chirality of polypeptides, the promising generation of aqueous circularly polarized luminescence (CPL) based on their self-assembly has been rarely reported due to the weak fluorescence of most polypeptides and the indeterminate self-assembly mechanism. Here, we propose a facile strategy for achieving aqueous CPL based on the self-assembly of simple homopolypeptides modified with a terminal group featuring both twisted intramolecular charge transfer and aggregation-induced emission properties. A morphology-dependent CPL can be observed under different self-assembly conditions by altering the solvents. A nanotoroid-dispersed aqueous solution with detectable CPL can be obtained by using tetrahydrofuran as a good solvent for the self-assembly, which is attributed to the involvement of the terminal group in the chiral environment formed by the homopolypeptide chains. However, such a chiral packing mode cannot be realized in nanorods self-assembled from dioxane, resulting in an inactive CPL phenomenon. Furthermore, CPL signals can be greatly amplified by co-assembly of homopolypeptides with the achiral small molecule derived from the terminal group. This work not only provides a pathway to construct aqueous CPL-active homopolypeptide nanomaterials but also reveals a potential mechanism in the self-assembly for chiral production, transfer, and amplification in polypeptide-based nanostructures.
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