Journal
ORGANIC LETTERS
Volume 13, Issue 12, Pages 3166-3169Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol201093t
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Funding
- PRIN [2007Y7JM-4M]
- PRISMA (ISOS)
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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.
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