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1Preparation of high purity 1,2-diols by catalytic oxidation of linear terminal alkenes with H_2O_2 in the presence of carboxylic acids under solvent-free conditions显示文摘The oxidation of terminal alkenes was smoothly catalyzed by a recyclable and environmentally friendly catalytic system: [(C18H37)2N(CH3)2]3[PW4O16]/H2O2/formic acid. This new catalytic system is not only capable of catalyzing oxidation of terminal alkenes with a phase-transfer character, but also under solvent-free conditions, avoiding the use of chlorinated solvents. Many different kinds of terminal alkenes could be converted to the corresponding 1,2-diols of high purity in high yields. The catalyst could be easily separated and reused after reaction. Both fresh and used [(C18H37)2N(CH3)2]3[PW4O16] catalyst was characterized by Raman and FTIR.Xu-Wei Wu Bin-Dong Li 2014Chinese Chemical Letters2014,25,3:1
2拉曼光谱技术在灵敏检测气味物质中的应用进展显示文摘气味物质是食品和药品品质评价的重要指标之一。拉曼光谱技术,尤其是表面增强拉曼光谱技术,具有无损、高灵敏、检测速度快等优点,在气味物质灵敏检测方面具有突出优势。本文总结和梳理了气味物质化学结构与拉曼位移之间的关系,系统综述了拉曼光谱技术在甜、苦、酸、鲜和混合气味物质检测方面中的应用,并展望了该技术在气味物质检测领域的未来发展方向。文有青 李芷瑶 宁滢 王海霞 2023分析试验室2023,42,10:0
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