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Mono- and bis-dialkylaminophenylbuta-1,3-dienyl boron-dipyrromethenes(BODIPYs) 1–12 were synthesized in 36%–42% yields by a Knoevenagel-type condensation. The absorption and emission maxima(labs= 614–739 nm; lem= 655–776 nm in CHCl3) of 1–12 covered from the visible to the nearinfrared region. Probe 1 was ratiometric Vis p H probes. Such probe was almost non-fluorescent. Upon the protonation of the tertiary amine function of 1, the strong fluorescence(Φf= 0.97) was released and the florescence intensity was dramatically increased by one thousand folds. The sharp isosbestic points were discovered at 590 nm, which was a ratiometric p H probe.
Mono- and bis-dialkylaminophenylbuta-1,3-dienyl boron-dipyrromethenes (BODIPYs) 1-12 were synthesized in 36% -42% yields by a Knoevenagel-type condensation. The absorption and emission maxima (labs = 614-739 nm; lem = 655-776 nm in CHCl3) of 1-12 covered from the visible to the near infrared region. Probe 1 was ratiometric Vis p H probes. the strong fluorescence (Φf = 0.97) was released and the florescence intensity was was increased by one thousand folds. The sharp isosbestic points were discovered at 590 nm, which was a ratiometric p H probe.