一种新型pH荧光探针:中位-吡啶取代的硼二吡咯亚甲基(BDP)染料的合成、结构与光谱性质研究

摘要

A new bomn-dipyrromethene (BDP) dye with pyridine subunit at meso-position has been synthesized and structurally characterized by X-ray diffraction crystal structure analysis.The meso-pyridine ring is nearly perpendicular to the indacene plane with torsion angle being 88.2°.Its absorption and steady-state fluorescence properties are investigated.The compound shows strong fluorescent quenching upon increasing the solution acidity.The pK, value calculated from the pH dependent fluorescence emission spectra is 2.24.It can be used as a pH probe excited with visible light.CCDC: 297327.%本文报道了一种新型中位-吡啶取代的硼-二吡咯亚甲基(BDP)染料的合成与晶体结构表征,发现中位-吡啶环与因达省平面几乎正交,其二面角为88.2°.同时对它的吸收和稳态荧光性质研究表明:当溶液的酸性增强时,化合物的荧光减弱,pKa为2.24.该化合物在可见光激发下,可以作为比较灵敏的pH荧光探针.