文献类型：期刊文献

英文题名：Surfactant-induced chirality transfer, amplification and inversion in a cucurbit[8]uril-viologen host-guest supramolecular system

作者：Xu, Hui;Lu, Huanhuan;Zhang, Qi;Chen, Meng;Shan, Yahan;Xu, Tian-Yi;Tong, Fei[1];Qu, Da-Hui[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Sch Chem & Mol Engn,Inst Fine Chem, Joint Int Res Lab Precis Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr,Front, Shanghai 200237, Peoples R China

年份：2022

卷号：10

期号：7

起止页码：2763

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY C

收录：;EI(收录号：20220911705669);WOS:【SCI-EXPANDED(收录号:WOS:000716605200001)】；

基金：This work was supported by the National Natural Science Foundation of China (grants 22025503, 21790361, 21871084, and 21672060), the Shanghai Municipal Science and Technology Major Project (grant 2018SHZDZX03), the Fundamental Research Funds for the Central Universities, the Program of Introducing Talents of Discipline to Universities (grant B16017), the Program of Shanghai Academic/Technology Research Leader (19XD1421100), and the Shanghai Science and Technology Committee (grant 17520750100). We thank the NSFC/China for financial support. F. T. also thanks the Shanghai Sailing Program (21YF1409200) and the Fundamental Research Funds for the Central Universities. We thank the Research Center of Analysis and Test of East China University of Science and Technology for help on the characterization.

语种：英文

外文关键词：Circular dichroism spectroscopy - Molecules - Chirality - X ray scattering - Sulfur compounds - Supramolecular chemistry - Stereochemistry - Dichroism

摘要：Chirality manipulation in supramolecules, especially in multicomponent supramolecular structures, is crucially desired. Herein, we report a feasible approach to achieve the chirality transfer, amplification, and inversion in a ternary supramolecular system consisting of new chiral molecules L4, which contain two positively charged viologen units and express an R configuration, cucurbit[8]uril (CB[8]) molecules, and surfactant molecules sodium dodecyl sulfate (SDS). A series of experimental techniques and measurements were used to investigate the mechanism of chirality changes, including circular dichroism (CD) spectroscopy, absorption spectroscopy, isothermal titration calorimetry (ITC), and small-angle X-ray scattering (SAXS). The achiral SDS molecules were found to facilitate the transformation of chirality from the molecular level to the supramolecular level. The CD signals could be regulated precisely as the coassembled ternary supramolecular structure of the L4/SDS/CB[8] system strongly depended on the quantity of each component. When the molar ratio of L4, SDS, and CB[8] reached 3 : 2 : 2, a significant chirality inversion from the positive upward CD signals to the negative downward CD signals was observed. The combination effects of non-covalent interactions which involve electrostatic and host-guest interactions caused a supramolecular structure packing change from the lamellar to the rectangular stacking pattern and resulted in a large chirality inversion at the supramolecular level. Our results may provide a facile approach to regulate multiple chiral activities in multicomponent supramolecular systems.