19205-44-8Relevant academic research and scientific papers
Regioselective synthesis of 1,2- vs 1,3-squaraines
Ronchi, Elisabetta,Ruffo, Riccardo,Rizzato, Silvia,Albinati, Alberto,Beverina, Luca,Pagani, Giorgio A.
, p. 3166 - 3169 (2011)
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-regioisomers 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.
