Further studies on the biodegradation of ionic liquids
作者:Leigh Ford、Jitendra R. Harjani、Farzad Atefi、M. Teresa Garcia、Robert D. Singer、Peter J. Scammells
DOI:10.1039/c0gc00082e
日期:——
A range of ionic liquids (ILs) containing a pyridinium cation were synthesised and their biodegradability was evaluated using the CO2 headspace test (ISO 14593). ILs bearing a 1-(2-hydroxyethyl) side chain were prepared from either pyridine or nicotinic acid derivatives. These ILs showed high levels of biodegradation under aerobic conditions and can be classified as ‘readily biodegradable’. In contrast, pyridinium ILs with methyl or ethyl ether side chains showed significantly lower levels of biodegradability in the same test. Biodegradation studies on a range of novel ILs with acetal and carbamate functionalities, as well as thiazolium-based salts, also showed low levels of mineralization.
我们合成了一系列含有吡啶阳离子的离子液体 (IL),并使用二氧化碳顶空试验(ISO 14593)对其生物降解性进行了评估。含有 1-(2-羟乙基)侧链的离子液体由吡啶或烟酸衍生物制备而成。这些 IL 在有氧条件下显示出较高的生物降解水平,可归类为 "易生物降解"。相比之下,带有甲基或乙基醚侧链的吡啶鎓惰性聚合体在同一测试中的生物降解能力明显较低。对一系列具有缩醛和氨基甲酸酯官能团的新型 IL 以及噻唑盐进行的生物降解研究也显示出较低的矿化水平。