波谱学杂志2026，Vol.43Issue(2)：146-163,18.DOI:10.11938/cjmr20253182
单糖在咪唑基离子液体/DMSO-d6中构型分布的NMR研究
NMR Study of Tautomeric Distribution of Monosaccharides in Imidazolyl Ionic Liquids/DMSO-d6
摘要
Abstract
The tautomeric distribution of monosaccharides could influence reaction pathways and product selectivity during their conversion and utilization.Using DMSO-d6 as cosolvent,we investigated the tautomeric distribution of monosaccharides in imidazolyl ionic liquids at 25℃by quantitative 1H NMR.In acidic ionic liquids,the results indicate that the proportion of β-pyranose after equilibrium decreases in the following order:D-glucose>D-glucosamine hydrochloride>N-acetyl-D-glucosamine>D-mannose.D-fructose is almost completely converted to 5-hydroxymethylfurfural(formed from the furanose)in[HSO3-BMIM]HSO4.In other ionic liquids,the proportion of furanose even exceeds that of pyranose after equilibrium.The introduction of amphoteric metal chloride and fluorine may lead to a higher proportion of furanose.The addition of[BMIM]BF4 and other reagents may inhibit the tautomeric conversion of monosaccharides.The fundamental data on monosaccharide tautomer distribution can guide the selection and design of ionic liquids for biomass conversion.关键词
单糖/咪唑基离子液体/NMR/构型分布Key words
monosaccharides/imidazolyl ionic liquids/NMR/tautomeric distribution分类
数理科学引用本文复制引用
刘佳,王英雄,赵建成..单糖在咪唑基离子液体/DMSO-d6中构型分布的NMR研究[J].波谱学杂志,2026,43(2):146-163,18.基金项目
国家自然科学基金项目(22075308). （22075308）
