论文部分内容阅读
A new fluorescent probe(BPbl) for Pb~(2+) has been synthesized,where diethanolamine(receptor) is linked with 4,4-difluoro-4-bora-3a, 4a-diaza-s-indacene(BODIPY)(fluorophore) via a methylene group(spacer).The absorption(496 nm) and emission (505 nm) wavelengths are in visible range.The fluorescence quantum yields of the lead-free and lead-bound states of BPb_1 in acetonitrile are 0.013 and 0.693,respectively.The large chelation enhanced fluorescence effect(CHEF) with Pb~(2+) can be explained by the blocking of the photoinduced electron transfer(PET) process.
A new fluorescent probe (BPbl) for Pb ~ (2+) has been synthesized, where diethanolamine (receptor) is linked with 4,4-difluoro-4-bora-3a, 4a- diaza-s-indacene (496 nm) and emission (505 nm) wavelengths are in visible range. The fluorescence quantum yields of the lead-free and lead-bound states of BPb_1 in acetonitrile are 0.013 and 0.693, respectively. The large chelation enhanced fluorescence effect (CHEF) with Pb ~ (2+) can be explained by the blocking of the photoinduced electron transfer (PET) process.