title: Novel azepino-perylenebisimides: synthesis, structure, and properties.
abstract: The first example of an azepine ring formation by counterintuitive nucleophilic participation of DBU was observed at the sterically crowded bay area of electron-deficient perylenebisimide (PBI). This is also a rare example of the formation of a seven-membered ring via two consecutive C-N bond formations in a single step. Azepino-PBIs reveal panchromatic absorption covering the whole visible region. Further novelty of these PBIs lies within the fact that their photophysical characteristics can easily be modulated by suitable substituents.
authors.affiliation: Department of Chemistry, Indian Institute of Science Education and Research , Bhopal 462 066, India.
authors.forename: Ruchika
authors.initials: R
authors.lastname: Mishra
authors.forename: Piyush
authors.initials: P
authors.lastname: Panini
authors.forename: Jeyaraman
authors.initials: J
authors.lastname: Sankar