title: Yellow NIR dye: π-fused bisbenzoBODIPYs with electron-withdrawing groups.
abstract: Bicyclo[2.2.2]octadiene-fused (BCOD-fused) bis(benzoborondipyrromethene)s (bisbenzoBODIPYs) bearing electron-withdrawing groups such as fluorine and cyano groups were prepared either by incorporating tetrafluoroisoindole moieties into BODIPY chromophores or by introducing cyano or ethoxycarbonyl groups at the 3,5-positions. The BCOD-fused bisbenzoBODIPYs were quantitatively converted to the corresponding benzene-fused bisbenzoBODIPYs by a retro-Diels-Alder reaction. The π-fused bisbenzoBODIPYs were found to have intense absorption in the near-infrared region and not to have any strong absorption bands in the visible region. Moreover, the bisbenzoBODIPYs were stable under atmospheric conditions.
authors.affiliation: Department of Chemistry and Biology, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan. uno@ehime-u.ac.jp.
authors.forename: Mitsunori
authors.initials: M
authors.lastname: Nakamura
authors.forename: Manami
authors.initials: M
authors.lastname: Kitatsuka
authors.forename: Kohtaro
authors.initials: K
authors.lastname: Takahashi
authors.forename: Toshi
authors.initials: T
authors.lastname: Nagata
authors.forename: Shigeki
authors.initials: S
authors.lastname: Mori
authors.forename: Daiki
authors.initials: D
authors.lastname: Kuzuhara
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Okujima
authors.forename: Hiroko
authors.initials: H
authors.lastname: Yamada
authors.forename: Takahiro
authors.initials: T
authors.lastname: Nakae
authors.forename: Hidemitsu
authors.initials: H
authors.lastname: Uno