Synthesis and Testing of a Novel Fluorescence Label for Carboxyls in Carbohydrates and Cellulosics
作者:Paul Kosma、Rainer Bohrn、Antje Potthast、Thomas Rosenau、Herbert Sixta
DOI:10.1055/s-2005-921923
日期:——
A carboxyl-selective fluorescence label, 9H-fluoren-2-yl-diazomethane (FDAM, 6) for the detection of carboxyl groups specifically in polysaccharides and low-molecular weight carbohydrates has been developed. Attached in a pre-column derivatization step, the label allows detection of minute amounts of oxidized functionalities in oligosaccharides and cellulosics under the relatively harsh conditions of GPC separation in the DMAc/LiCl eluant and without any fluorescence interference with light scattering (MALLS) detection, so that carboxyl profiles of polysaccharides were obtained for the first time. Synthetic carbohydrate model compounds (1-3) were used to optimize the labeling reaction.
本研究开发了一种羧基选择性荧光标签--9H-芴-2-基二氮甲烷(FDAM,6),专门用于检测多糖和低分子量碳水化合物中的羧基。在柱前衍生步骤中附加该标签,可在 DMAc/LiCl 洗脱液中相对苛刻的 GPC 分离条件下检测低聚糖和纤维素中的微量氧化官能团,且无需任何荧光干扰光散射(MALLS)检测,从而首次获得了多糖的羧基概况。合成碳水化合物模型化合物(1-3)用于优化标记反应。