Regioselective Synthesis of 1,2- vs 1,3-Squaraines

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• 作者：Elisabetta Ronchi ; Riccardo Ruffo ; Silvia Rizzato ; Alberto Albinati ; Luca Beverina ; Giorgio A. Pagani
• 刊名：Organic Letters
• 出版年：2011
• 出版时间：June 17, 2011
• 年：2011
• 卷：13
• 期：12
• 页码：3166-3169
• 全文大小：746K
• 年卷期：v.13,no.12(June 17, 2011)
• ISSN：1523-7052

文摘

Squaraines have been known for many decades as very stable and versatile vis鈥揘IR 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.