超分子化学
发光
超分子手性
材料科学
酞菁
分子
纳米管
非共价相互作用
纳米技术
螺旋(腹足类)
结晶学
化学
碳纳米管
光电子学
氢键
有机化学
生物
蜗牛
生态学
作者
Xiqian Wang,Luyang Zhao,Chiming Wang,Xuenan Feng,Qing Ma,Gengxiang Yang,Tianyu Wang,Xuehai Yan,Jianzhuang Jiang
出处
期刊:Small
[Wiley]
日期:2021-11-23
卷期号:18 (4)
被引量:7
标识
DOI:10.1002/smll.202104438
摘要
Nanotubes with circularly polarized luminescence (CPL) are attracting much attention due to many potential applications, such as chiroptical materials, displays, and sensing. However, it remains a challenge to change the assemblies of ordinarily molecular building blocks into CPL supramolecular nanotubes. Herein, the regulation of quite common dipeptide (Fmoc-FF) assemblies into unprecedented helical nanotubes exhibiting intense CPL is reported by simply doping a few phthalocyanine (octakis(carboxyl)phthalocyaninato zinc complex (Pc)) molecules. Interestingly, altering the Fmoc-FF/Pc molar ratios over a wide range cannot change the nanotubes structures according to transmission electron microscopy (TEM) and atomic force microscope (AFM) measurements. Although molecular dynamics simulations suggest that the noncovalent interactions between Fmoc-FF and Pc are quite weak, few Pc molecules can still change the secondary structures of a large number of Fmoc-FF assemblies, which hierarchically form helical supramolecular nanotubes with long-range ordered molecular packing, leading to intense CPL signals with large luminescence dissymmetry factor (glum = 0.04). Consequently, the chiral reorganization of Fmoc-FF assemblies is dependent on the coassembly between Pc molecule and Fmoc-FF supramolecular architectures. These results open the possibility for the fine-tuning of helix and supramolecular nanotubes with CPL properties by using a small number of cofactors.
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