Efficient synthesis of α/β-isomeric oxadiazolyl and triazolopyridyl BODIPYs for sensing of Hg2+ ions and pH sensors
作者:Bintu Kumar、Prakriti Saraf、Madhushree Sarkar、Dalip Kumar
DOI:10.1016/j.tet.2023.133380
日期:2023.3
triazolopyridyl substituent in 6a has affected its binding ability with metal ions and has rendered unique photophysical response by 6a selectively in presence of Hg2+ ions. Compound 6a showed high affinity towards Hg2+ (Ka = 1.8 × 104 M−1) with 2.1 μM limit of detection. The binding stoichiometry between 6a and Hg2+ was determined to be 2:1 by Job's plot analysis. Under acidic conditions, compounds 4c, 5c, 6a and
开发了一种简单的连续一锅法方案,通过使用碘 (III) 促进的 BODIPY 酰肼-腙的氧化环化来制备恶二唑基和三唑并吡啶基-BODIPY 衍生物4-6 ,这很容易从甲酰基 BODIPY 与芳基酰肼的反应中获得。与母体 BODIPY 相比,制备的化合物 4-6 的光物理研究表明吸收和发射最大值发生显着红移。6a中三唑并吡啶基取代基的存在影响了其与金属离子的结合能力,并在 Hg 2+离子存在下选择性地赋予6a独特的光物理响应。化合物6a显示出对 Hg 2+ 的高亲和力(K a = 1.8 × 10 4 M −1 ),检测限为 2.1 μM。6a和 Hg 2+之间的结合化学计量由 Job 的图分析确定为 2:1。在酸性条件下,化合物4c、5c、6a和6b在 BODIPY 单元的 α/β 位置带有二甲基氨基和三唑并吡啶基部分,表现出蓝移吸收(10-15 nm)和发射光谱(7-34 nm)。化合物4c