Synthesis and Properties of the <i>p</i>-Sulfonamide Analogue of the Green Fluorescent Protein (GFP) Chromophore: The Mimic of GFP Chromophore with Very Strong N–H Photoacid Strength
作者:Yi-Hui Chen、Robert Sung、Kuangsen Sung
DOI:10.1021/acs.orglett.8b00257
日期:2018.4.6
The para-sulfonamide analogue (p-TsABDI) of a green fluorescent protein (GFP) chromophore was synthesized to mimic the GFP chromophore. Its S1 excited-state pKa* value in dimethylsulfoxide (DMSO) is −1.5, which is strong enough to partially protonate dipolar aprotic solvents and causes excited-state proton transfer (ESPT), so it can partially mimic the GFP chromophore to further study the ESPT-related
的对位-磺酰胺类似物(p绿色荧光蛋白(GFP)的发色团的-TsABDI)合成以模仿GFP发色团。它在二甲亚砜(DMSO)中的S 1激发态p K a *值为-1.5,足以使部分偶极非质子溶剂质子化并引起激发态质子转移(ESPT),因此它可以部分模拟GFP发色团进一步研究与ESPT有关的光物理和GFP的闪烁现象。与8-羟基py 1,3,6-三磺酸盐(HPTS)(p K a = 7.4,p K a * = 1.3在水中)相比,p -TsABDI(p K a= 6.7,在DMSO中,p K a * = -1.5)是用于pH跳跃研究的更好的光酸。