title: Helix Sense-Selective Supramolecular Polymerization Seeded by a One-Handed Helical Polymeric Assembly.
abstract: Helix sense-selective supramolecular polymerization was achieved using a one-handed helical nanotubular polymeric assembly as a seed. First, bipyridine (BPY)-appended achiral hexabenzocoronene ((BPY)HBC) was copolymerized noncovalently with chiral (BPY)HBC(S) (or (BPY)HBC(R)) at a molar ratio of 9:1, which, via the sergeants-and-soldiers effect, afforded a P-helical (or M-helical) nanotube, which was then treated with Cu(2+) to transform into structurally robust ((BPY)Cu)NT(P) (or ((BPY)Cu)NT(M)) with a Cu(2+)/BPY coordination polymer shell. Helical seeds ((BPY)Cu)NT(P) and ((BPY)Cu)NT(M) brought about the controlled assembly of fluorinated chiral FHBC(S) and FHBC(R) as well as achiral FHBC to yield one-handed helical nanotubular supramolecular block copolymers, in which the helical senses of the newly formed block segments were solely determined by those of the helical seeds employed. Noteworthy, FHBC(S) and FHBC(R) alone without the helical seeds form ill-defined agglomerates. Attempted supramolecular polymerization of a racemic mixture of FHBC(S) and FHBC(R) from ((BPY)Cu)NT(P) (or ((BPY)Cu)NT(M)) resulted in its chiral separation, affording P-helical (or M-helical) diastereomeric block segments composed of FHBC(S)and FHBC(R) with different thermodynamic properties.
authors.affiliation: RIKEN Center for Emergent Matter Science , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.|Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , 2999 North Renmin Road, Songjiang, Shanghai 201620, P. R. China.
authors.forename: Wusong
authors.initials: W
authors.lastname: Jin
authors.affiliation: Chemical Resources Laboratory, Tokyo Institute of Technology , 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
authors.forename: Takanori
authors.initials: T
authors.lastname: Fukushima
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Osaka University , 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Mori
authors.affiliation: RIKEN Center for Emergent Matter Science , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.|Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Takuzo
authors.initials: T
authors.lastname: Aida