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Updated: Feb 12, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
Published on: May 29, 2018
Hierarchical Emergence and Dynamic Control of Chirality in a Photoresponsive Dinuclear Complex
Yuichiro Hashimoto1, Takuya Nakashima1, Miku Yamada1
1Graduate School of Materials Science , Nara Institute of Science and Technology , Ikoma, Nara 630-0192 , Japan.
Abstract:
Chiroptical photoswitches are of interest from a viewpoint of applications in advanced information technologies. We report dynamic on-off photoswitching of circularly polarized luminescence (CPL) in a binuclear europium complex system. Two coordination units are arranged closely in a chiral fashion by a photoresponsive ligand with a one-handed helical structure. The chirality in the helical scaffold is hierarchically transferred to the chirality in nine-coordinate complex sites. The chiral close arrangement of complex units induces the enrichment of a specific chiral coordination structure in the nine-coordinate europium sites. The chiral arrangement of complex units is switched in conjunction with the photoinduced helix-nonhelix structural change in the photoresponsive framework, demonstrating on-off switching of CPL with high contrast.
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