Affiliation:
1. Laboratory for Chemistry and Life Science, Institute of Innovative Research Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku Yokohama 226-8503 Japan
2. Department of Chemistry, Faculty of Science Tokyo University of Science 1-3 Kagurazaka, Shinjuku-ku Tokyo 162-8601 Japan
Abstract
AbstractTo develop new hybrid micelles with alkyl/polyaromatic core–shell structures, we synthesized umbrella‐shaped amphiphiles bearing a bent anthracene dimer with a linear alkyl chain (i.e., octyl and hexadecyl groups). The amphiphiles quantitatively assemble into spherical micelles (~2–3 nm in core diameter), possessing an alkylated cavity surrounded by a polyaromatic framework, in water. The alkylation significantly enhances the stability of the micellar structures against dilution (up to 9 μM) and heat (up to >120 °C). The highly condensed hexadecyl core of the hybrid micelle, as indicated by solvatochromic guest probes, displays increased uptake ability toward large alkylated metallodyes. Interestingly, efficient uptake of aromatic macrocycles (i.e., [n]cycloparaphenylenes) by the present micelle provides pseudorotaxane‐shaped host–guest composites with high emissivity (ΦF=up to 35 %). Internal multi‐alkylation of an aromatic micelle can thus successfully enhance its assembly stability/guest uptake functions.