作者:Elisabetta Ronchi、Riccardo Ruffo、Silvia Rizzato、Alberto Albinati、Luca Beverina、Giorgio A. Pagani
DOI:10.1021/ol201093t
日期:2011.6.17
Squaraines have been known for many decades as very stable and versatile vis-NIR absorbing dyes. They have found applications for example as sensitizers in organic photovoltaics and photodetectors. The most common squaraine structure is the 1,3-regioisomer. Their 1,2-regiolsomers are seldom mentioned and unanimously regarded as side products. A facile direct synthesis of 1,2-squaraines, highlighting the role played by reaction conditions and electronic factors, is described. The first electrochemical characterization of these dyes is also shown.