Abstract
Fluorescent dyes with photoinduced intramolecular charge-transfer (ICT) process driven by β-enaminone group capable to form resonance-assisted hydrogen bond (RAHB) structure were prepared from aromatic and heterocyclic precursor molecules, such as 1-aminopyrene, 9-amino acridine, and adenine. The electronic ground and excited-state spectral properties of these new dyes are modulated by the type of substituent in the β-enaminone group and solvent interaction as well. The excited-state properties and the complex kinetics observed are results of the interplay between charge and proton transfer, together with the presence of possible conformers or tautomers associated with the keto-amine/enol-imine equilibrium. The applications of such dye derivatives as molecular probes in radical copolymerization with acrylic monomers and as reporters in silver nanoparticles dye interaction in solution are also discussed.
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Acknowledgments
The authors thank Brazilian Science Foundation FAPESP and CNPq for financial support. ERS and CAS are graduate fellows of CAPES. RVP thanks FAPESP for postdoctoral fellowship.
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Gehlen, M.H., Simas, E.R., Pereira, R.V., Sabatini, C.A. (2012). Modulation of Dye Fluorescence by Photoinduced Intramolecular Charge Transfer with Resonance-Assisted Hydrogen Bond. In: Geddes, C. (eds) Reviews in Fluorescence 2010. Reviews in Fluorescence, vol 2010. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9828-6_6
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