| 초록 |
Evolution of supramolecular chirality from self-assembly of achiral compounds and control over its handedness is closely related to the evolution of life and development of supramolecular materials with desired handedness. Here we report a system where the entire process of induction, control, and locking of supramolecular chirality can be manipulated by light. Combination of triphenylamine and diacetylene moieties in the molecular structure allowed photo-induced self-assembly of the molecule into helical aggregates in a chlorinated solvent by visible light, and covalent fixation of the aggregate via photopolymerization by UV. By utilizing circularly polarized light (CPL), we observed that supramolecular chirality of the helical aggregates was selectively and reversibly controlled by the rotational direction of visible CPL, and the desired supramolecular chirality could be arrested by irradiation of circular polarized ultraviolet light. |
