title: Chiroptical molecular propellers based on hexakis(phenylethynyl)benzene through the complexation-induced intramolecular transmission of local point chirality.
abstract: We designed hexakis(phenylethynyl)benzene derivatives with a tertiary amide group on each blade to achieve a helically biased propeller arrangement through the complexation-induced intramolecular transmission of point chirality. A hydrogen-bonding ditopic guest was captured at two amide groups, and thus could pair two neighboring blades to form a supramolecular cyclic structure, in which an auxiliary chiral group associated with a blade acted as a chiral handle to control the helical bias, while the chiral auxiliary did not exert any helical influence on the dynamic helicity in the absence of a guest due to the high flexibility of each blade.
authors.affiliation: Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan. katoono@sci.hokudai.ac.jp tak@sci.hokudai.ac.jp.
authors.forename: Ryo
authors.initials: R
authors.lastname: Katoono
authors.forename: Keiichi
authors.initials: K
authors.lastname: Kusaka
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Kawai
authors.forename: Yuki
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Keisuke
authors.initials: K
authors.lastname: Hanada
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Nehira
authors.forename: Kenshu
authors.initials: K
authors.lastname: Fujiwara
authors.forename: Takanori
authors.initials: T
authors.lastname: Suzuki