title: 2,6-Diphospha-s-indacene-1,3,5,7(2 H,6 H)-tetraone: a phosphorus analogue of aromatic diimides with the minimal core exhibiting high electron-accepting ability.
abstract: Phosphorus analogues of pyrromellitic diimides (PyDIs), which represent a family of privileged electron-accepting organic compounds, have been successfully synthesized as novel electron-accepting π-conjugated molecules. Investigation into their physicochemical properties uncovered their prominent electron-accepting abilities over the corresponding PyDI. Furthermore, theoretical studies revealed the significant contribution of σ*-π* hyperconjugation in stabilizing the LUMO+1.
authors.affiliation: Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871 (Japan); Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871 (Japan). takeda@chem.eng.osaka-u.ac.jp.
authors.forename: Youhei
authors.initials: Y
authors.lastname: Takeda
authors.forename: Takuya
authors.initials: T
authors.lastname: Nishida
authors.forename: Satoshi
authors.initials: S
authors.lastname: Minakata
keywords: aromatic diimides; electron acceptors; phosphorus heterocycles; photophysics; π conjugation