title: Azepiphthalocyanine--an unprecedented large twist of a π-conjugation system upon core-modification with a seven-membered ring unit.
abstract: Aromatic dicarbonitrile bearing cyano groups in a 1,4-relationship was utilized for a phthalocyanine synthesis to give azepiphthalocyanine having a seven-membered ring unit instead of a five-membered ring unit. This molecule exhibits a significantly twisted structure and large splitting of the Q band absorption, indicative of its azachlorin-like conjugation system.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan. ssoji@m.tohoku.ac.jp
authors.forename: Soji
authors.initials: S
authors.lastname: Shimizu
authors.forename: Hua
authors.initials: H
authors.lastname: Zhu
authors.forename: Nagao
authors.initials: N
authors.lastname: Kobayashi