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Synthesis and photophysical characterisation of long alkyl side-chain derivatives of benzo[a]phenoxazinium salts
1 , 2 , * 1
1  Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
2  Centro de Física, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal

Abstract: Several fluorescent benzo[a]phenoxazinium chlorides possessing a long hydrocarbon chain terminated with methyl, hydroxyl, carboxylic acid or ester groups as substituent at the 5-amino function of the heterocycle were efficiently synthesised. Studies of their photophysical properties revealed that all compounds absorbed and emitted at longer wavelengths with moderate to good fluorescent quantum yields.
Keywords: Benzo[a]phenoxazines; Fluorescent labels; Functionalised fluorophores; Longwavelength fluorophores

 
 
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