Fluorescence Switching of Imidazo[1,5-<i>a</i>]pyridinium Ions: pH-Sensors with Dual Emission Pathways
作者:Johnathon T. Hutt、Junyong Jo、András Olasz、Chun-Hsing Chen、Dongwhan Lee、Zachary D. Aron
DOI:10.1021/ol3012524
日期:2012.6.15
Imidazo[1,5-a]pyridinium ions are identified as highly emissive and water-soluble fluorophores accessed by an efficient three-component coupling reaction. Synthetic modifications of groups conjugated to the polyheterocyclic core are shown to profoundly impact the emission properties of these molecules. Notably, two structural isomers of functionalized imidazo[1,5-a]pyridinium ions were found to exhibit
咪唑并[1,5- a ]吡啶离子被鉴定为通过有效的三组分偶联反应获得的高发射性和水溶性荧光团。已显示出与多杂环核心共轭的基团的合成修饰深刻地影响了这些分子的发射特性。值得注意的是,发现官能化的咪唑并[1,5- a ]吡啶鎓离子的两个结构异构体表现出不同的去激发途径,这引起荧光开启或对pH值变化的比例响应。