1. 11,11,12,12-Tetracyano-4,5-pyrenoquinodimethanes: Air-Stable Push–Pull o-Quinodimethanes with S2 Fluorescence
- Author
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Sandeep More, Aurelio Mateo-Alonso, Raúl García, Manuel Melle-Franco, and Universidade do Minho
- Subjects
Ciências Químicas [Ciências Naturais] ,Science & Technology ,Engenharia e Tecnologia::Outras Engenharias e Tecnologias ,Organic Chemistry ,Photochemistry ,Ciências Naturais::Ciências Químicas ,Biochemistry ,Fluorescence ,3. Good health ,chemistry.chemical_compound ,chemistry ,Intramolecular force ,Outras Engenharias e Tecnologias [Engenharia e Tecnologia] ,Dicyanomethane ,Pyrene ,Organic chemistry ,Physical and Theoretical Chemistry ,Push pull - Abstract
The synthesis and properties of 11,11,12,12-tetracyano-4,5-pyrenoquinodimethanes (4,5-TCNPs), a new family of isolable and air-stable o-quinodimethanes, are reported. The ortho disposition of the dicyanomethane substituents strongly polarizes the pyrene framework to promote broad and intense intramolecular charge-transfer transitions. In addition, spectroscopic studies reveal that 4,5-TCNPs violate Kasha’s rule and emit from the S2 level., Fundação para a Ciência e a Tecnologia (FCT)
- Published
- 2014