A chiral reaction field with thermally invertible helical sense enables control of the helicity of the reaction product, which is a central challenge in asymmetric synthesis that has yet to be overcome. A novel chiral compound comprising two types of chiral moieties with opposite helicities and temperature dependences is synthesized; this compound is added as a chiral dopant to a mixture of nematic liquid crystals to prepare a chiral nematic liquid crystal (N*‐LC). The N*‐LC containing the chiral dopant exhibits thermally invertible helicity to yield left‐ and right‐handed helical senses at low and high temperatures, respectively. Interfacial polymerization of acetylene is achieved in the N*‐LC by modulating the temperature. Helical polyacetylenes (H‐PAs) that are synthesized at low (−12 °C) and high (28 °C) temperature show right‐ and left‐handedness, respectively, in terms of the fibrils, fibril bundles, and spiral morphology. In addition, the helical sense of H‐PA is opposite that of the N*‐LC because of the peculiar polymerization mechanism for acetylene in the N*‐LC. The current N*‐LC is the first chiral reaction field that has not only the thermally invertible helical sense but also the chemical functions and stability needed to serve as the medium for polymer reactions.

Aqueous colloids of didodecytdimethylammonium bromide (DMA), allylbis[2-(dodecanoyloxycarbonyl)ethyl] methylammonium bromide (ADM) and polymer of ADM (PADM) were employed for morphological and rheological studies.The polymerization was carried out by irradiation of UV-light for the monomeric colloid. Weight average molecular weight of the polymer is about 16.3 x 104.Diameters of vesicles at critical micelle (aggregate) concentration were 8 -10 nm in the aqueous colloids of DMA, ADM and PADM. Various bilayer textures which were dependent upon the concentration and the temperature could be found in these amphiphiles. In particular, the bilayer textures were full in variety in the PADM system.Rheological properties of the aqueous colloids of these amphiphiles depended strongly upon the bilayer textures.

In article number 1906665, Kazuo Akagi and co‐workers report the synthesis of a novel chiral compound comprising two types of chiral moieties with opposite helicities and temperature dependences, which they then add as a chiral dopant to a mixture of nematic LCs to prepare a chiral nematic liquid crystal (N*‐LC). The N*‐LC exhibits thermally invertible helicity to yield left‐ and right‐handed helical senses at low and high temperatures, respectively, which enables the production of helicity‐controlled helical conjugated polymers.