论文
Tunable molecular packing modes via H- or J-aggregates in the supramolecular helical nanostructures from an achiral C-3 symmetric molecule
- 发布时间：2023-10-19
- 点击次数：
- 关键字：CHIRALITY; ASSEMBLIES; FLUORESCENCE; GELS; ENHANCEMENT; DISCOTICS; BREAKING; SYSTEMS; FILMS
- 摘要：The self-assembly of a C-3-symmetric molecule benzene-1,3,5-tricarboxylate substituted with methyl cinnamate (BTECM) has been investigated by a reprecipitation method in H2O and cetyltrimethylammonium bromide (CTAB) aqueous solution, respectively. The nanostructures and characteristics of the assemblies were monitored by UV-Vis spectroscopy, fluorescence (FL) spectroscopy, circular dichroism (CD) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that helical nanostructures were successfully assembled from the achiral C-3 molecule BTECM. More importantly, the helices aggregated via different packing modes in H2O and CTAB aqueous solution. In H2O, the nanostructures underwent a process of particles, fibers and helices via H-type aggregate upon aging. In the case of CTAB aqueous solution (1.2 mM), the helices were translated from particles and the molecules were inclined to aggregate via the J-type mode. In addition, the aggregation process could be accelerated by raising the temperature proved by UV-Vis spectra. A molecular aggregation mechanism was proposed based on the experimental results.
- 卷号：19
- 期号：26
- 是否译文：否