A Novel Fluorescent Probe for Lead Ions

O6; A new fluorescent probe for lead ions, p-nitrophenyl 3H-phenoxazin-3-one-7-ylphosphoric acid (NPPA), has been synthesized by linking resorufin (serving as a fluorophore andelectron acceptor) to p-nitrophenol (serving as a fluorescence quencher and electron donor)through phosphodiester bonds. Whe...

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Veröffentlicht in:中国化学快报(英文版) 2003-10, Vol.14 (10), p.1024-1026
Hauptverfasser: Ming SUN, Di Hua SHANG GUAN, Hui Min MA, Li Hua NIE, Xiao Hua LI, Shao Xiang XIONG
Format: Artikel
Sprache:eng
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Zusammenfassung:O6; A new fluorescent probe for lead ions, p-nitrophenyl 3H-phenoxazin-3-one-7-ylphosphoric acid (NPPA), has been synthesized by linking resorufin (serving as a fluorophore andelectron acceptor) to p-nitrophenol (serving as a fluorescence quencher and electron donor)through phosphodiester bonds. When NPPA was irradiated with light, intramolecularfluorescence self-quenching took place due to the PET (photoinduced electron transfer) from thedonor to the acceptor. However, upon addition of Pb , the phosphate ester bonds in the probe werecleaved and the fiuorophore was released, accompanying the retrievement of fluorescence.
ISSN:1001-8417