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TitleUltrasound promoted synthesis of Nile Blue derivatives
Author(s)Raju, B. Rama
Sampaio, Diogo
Silva, Maria Manuela
Coutinho, Paulo J. G.
Gonçalves, M. Sameiro T.
KeywordsUltrasound irradiation
Nile Blue derivatives
NIR fluorescent probes
Blue derivatives
Issue dateJan-2014
JournalUltrasonics Sonochemistry
Abstract(s)Ultrasound irradiation was used for the first time towards the synthesis of new Nile Blue related benzo[a]phenoxazinium chlorides possessing isopentylamino, (2-cyclohexylethyl)amino and phenethylamino groups at 5-position of the heterocyclic system. The efficacy of sonochemistry was investigated with some of our earlier reported synthesis of benzo[a]phenoxazinium chlorides. This newer protocol proved competent in terms of reaction times and enhanced yields. Photophysical studies carried out in ethanol, water and simulated physiological conditions, revealed that emission maxima occurred in the range 644-656 nm, with high fluorescent quantum yield. Other attractive feature exhibited by these materials includes good thermal stability. These properties might be useful in the development of fluorescent probes for biotechnology.
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AccessRestricted access (UMinho)
Appears in Collections:CDQuim - Artigos (Papers)

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