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N-Alkyl-N-[5-(propylamino)-9H-benzo[a]phenoxazin-9-ylidene]alkan-1- aminium chlorides: synthesis and photophysical studies
Published:
31 October 2009
by MDPI
in The 13th International Electronic Conference on Synthetic Organic Chemistry
session General Organic Synthesis
Abstract: Fluorescent benzo[a]phenoxazinium chlorides with dipropyl-, dioctyl- didecyl- and didodecyl-chains as the amino substituents of the 9-positions of the tetracyclic system were synthesised in moderate to good yields. All the compounds absorbed in the wavelength range of 638-641 nm and emitted at 673 or 676 nm with quantum yields of 0.17-0.19 in ethanol.
Keywords: Benzo[a]phenoxazinium dyes; Near-infrared fluorescence probes; Cationic dyes; Nile Blue derivatives
