分子筛上糖类催化转化的核磁共振研究

Progress in NMR Studies of Carbohydrates Conversion on Zeolites

葡萄糖、果糖和木糖等糖类是一类重要的绿色生物质资源,其高效利用是生物质转化的重要研究方向.具有Lewis酸性的分子筛在糖类催化转化中表现出优异的性能,对其活性中心结构、性质以及反应机理的认识是糖类高效转化研究中亟待解决的关键科学问题.核磁共振是分子筛上活性中心表征和反应机理研究的重要手段.本文讨论了先进核磁共振技术与方法在分子筛上糖类转化反应中的应用,包括催化剂活性中心表征、催化转化反应机理研究和催化反应产物分析3个方面,总结了核磁共振在糖类转化反应研究中所取得的新进展并对其未来发展方向进行了展望.

Carbohydrates are important biomass feedstock which can be transformed to expected products by catalytic processes.Metal-containing zeolites with Lewis acidity have been found to exhibit excellent reactivity in conversion of carbohydrates.Understanding the nature of active sites and reaction mechanism is essential for the development of highly active catalyst towards carbohydrates conversion.Nuclear magnetic resonance(NMR)spectroscopy is a powerful tool to provide useful information on active site and reaction mechanism in zeolite catalysis.This review focuses on the recent progress of NMR studies of active centers,interactions between catalysts and reactants,reaction mechanisms and product distributions in catalytic conversion of carbohydrates on zeolites.Challenges and opportunities in this field are also discussed.