Synthesis and photophysical characterisation of long alkyl side-chain derivatives of benzo[a]phenoxazinium salts

Carla Alves; Paulo Coutinho; M. Gonçalves

doi:10.3390/ecsoc-12-01229

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Highly Regioselective Synthesis of Functionalized Aminonitriles Starting from 2-(w-cyanoalkyl)aziridines

Synthesis and photophysical characterisation of long alkyl side-chain derivatives of benzo[a]phenoxazinium salts

Carla M. A. Alves

¹,

Paulo J. G. Coutinho

²,

M. Sameiro T. Gonçalves

^{*

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

Published: 07 November 2008 by MDPI in The 12th International Electronic Conference on Synthetic Organic Chemistry session General Organic Synthesis

https://doi.org/10.3390/ecsoc-12-01229

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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Carla Alves

Paulo Coutinho

M. Gonçalves