标题：Tuning of gel morphology with supramolecular chirality amplification using a solvent strategy based on an Fmoc-amino acid building block
作者：Zhang, Yimeng; Li, Shangyang; Ma, Mingfang; Yang, Minmin; Wang, Yajie; Hao, Aiyou; Xing, Pengyao
作者机构：[Zhang, Yimeng; Li, Shangyang; Ma, Mingfang; Yang, Minmin; Wang, Yajie; Hao, Aiyou; Xing, Pengyao] Shandong Univ, Sch Chem & Chem Engn, Key Lab Colloi 更多
通讯作者地址：[Hao, AY]Shandong Univ, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Peoples R China.
来源：NEW JOURNAL OF CHEMISTRY
摘要：Gel formation by an N-fluorenyl-9-methoxycarbonyl (Fmoc)-based molecule was investigated and the chirality amplification observed during the self-assembly process could be switched on and off by controlling the solvent environment. The molecules could form gel in mixed solvents of water and dimethyl sulfoxide (DMSO) at either a high water fraction to afford flat nanofibers or a low water fraction to generate nanofibers with supramolecular chirality. At a moderate fraction of water, the molecules self-assemble into a precipitate composed of nanosheets. Furthermore, the gels showed different mechanical properties and thermal stabilities. Mechanism studies showed that p-p stacking interactions between the aromatic Fmoc groups and hydrogen bondings between the amide groups played important roles in the self-assembly process of the different gels. This study strives to shed light on the tuning of chiral gels with various nanostructures via controlled self-assembly, which might have potential use in smart materials.