Fluorescent pH probes based on boron dipyrromethene dyes

Fluorescent pH probes based on boron dipyrromethene dyes
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基于硼二吡咯亚甲基染料的荧光 pH 探针

DOI:
10.1016/j.dyepig.2008.09.004
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发表时间:
2009-04
期刊:
影响因子:
4.5
通讯作者:
--
中科院分区:
材料科学2区
文献类型:
--
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基于4,4-二氟-4-硼杂-3a,4a-二氮杂-s-引达省染料的两种新型荧光pH探针被配置为“荧光团-间隔基-受体”系统。在水溶液中,基于光诱导电子转移,随着溶液酸度的增加,探针的荧光分别增强3倍(pH 8.70-4.93)和14倍(pH 9.02-3.29)。该探针可用作可见光激发的荧光pH探针;由荧光变化确定探针的pKa值。
Two novel fluorescent pH probes based on 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene dyes were configured as a “fluorophore-spacer-receptor” system. Their absorption and fluorescence properties were investigated in various solvents; in aqueous solution, based on their photo-induced electron transfer, the probes exhibited 3-fold (pH 8.70–4.93) and 14-fold (pH 9.02–3.29) fluorescence enhancement upon increase in the acidity of the solution, respectively. The probes can be used as fluorescent pH probes which are excitable with visible light; the pKavalues of the probes were determined from the fluorescence changes.
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