title: Synthesis of Tetrasilatetrathia[8]circulenes by a Fourfold Intramolecular Dehydrogenative Silylation of C-H Bonds.
abstract: The first two examples of a tetrasilatetrathia[8]circulene were synthesized in two steps from a tetraiodotetrathienylene by using a fourfold intramolecular dehydrogenative silylation of C-H bonds as the key step. A single-crystal X-ray diffraction analysis revealed that tetrasilatetrathia[8]circulene contains a perfectly planar [8]radialene skeleton. The excited-state dynamics of tetrasilatetrathia[8]circulene were evaluated by steady-state and time-resolved spectroscopic measurements, revealing an efficient intersystem crossing in the excited state.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan.
authors.forename: Yuma
authors.initials: Y
authors.lastname: Serizawa
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan.
authors.forename: Shuhei
authors.initials: S
authors.lastname: Akahori
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan.
authors.forename: Shohei
authors.initials: S
authors.lastname: Kato
authors.affiliation: Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan.
authors.forename: Hayato
authors.initials: H
authors.lastname: Sakai
authors.affiliation: Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan.
authors.forename: Taku
authors.initials: T
authors.lastname: Hasobe
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Miyake
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Shinokubo
keywords: annulation; circulenes; silylation; thiophenes