title: Synthesis, Structures, and Photophysical Properties of Alternating Donor-Acceptor Cycloparaphenylenes.
abstract: The synthesis of alternating donor-acceptor [12] and [16]cycloparaphenylenes (CPPs) has been achieved by the rhodium-catalyzed intermolecular cross-cyclotrimerization followed by imidation and/or aromatization. These alternating donor-acceptor CPPs showed positive solvatofluorochromic properties and smaller HOMO-LUMO gaps compared with nonfunctionalized CPPs, which was confirmed by the theoretical study.
authors.affiliation: Department of Chemical Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan.
authors.forename: Shuhei
authors.initials: S
authors.lastname: Nishigaki
authors.affiliation: Department of Chemical Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan.|Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo, 184-8588, Japan.
authors.forename: Miho
authors.initials: M
authors.lastname: Fukui
authors.affiliation: Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology O-okayama, Meguro-ku, Tokyo, 152-8551, Japan.
authors.forename: Haruki
authors.initials: H
authors.lastname: Sugiyama
authors.affiliation: Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology O-okayama, Meguro-ku, Tokyo, 152-8551, Japan.
authors.forename: Hidehiro
authors.initials: H
authors.lastname: Uekusa
authors.affiliation: Department of Chemical Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Kawauchi
authors.affiliation: Department of Chemical Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Shibata
authors.affiliation: Department of Chemical Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan.|Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo, 184-8588, Japan.
authors.forename: Ken
authors.identifier: http://orcid.org/0000-0003-0534-7559
authors.initials: K
authors.lastname: Tanaka
keywords: cycloparaphenylenes; cyclotrimerization; donor-acceptor systems; rhodium; solvatochromism