title: A new route to the synthesis of near-infrared absorbing pyrazinopyrazine bridged dyes with intramolecular charge transfer character.
abstract: A simple and versatile procedure was developed for the synthesis of pyrazino[2,3-b]thieno[3,4-e]pyrazine derivatives with intramolecular charge transfer character. The compounds obtained exhibited a narrower band gap compared to those with one pyrazine bridge.
authors.affiliation: Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China. waichan@hku.hk.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhang
authors.forename: Kin Cheung
authors.initials: KC
authors.lastname: Lo
authors.forename: Wai Kin
authors.initials: WK
authors.lastname: Chan