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Quality analysis of automotive fuel using solvatochromic probes

机译:使用溶剂变色探针对汽车燃料进行质量分析

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摘要

The effect of ethanol addition to pure gasoline on the solvatochromic band of dyes 2,6-diphenyl-4-(2,4,6-triphenylpyridinium-l-yl)phenolate (1), 2,6-di(4-terf-butylphenyl)-4-[2,4,6-tri(4-terf-butylphenyl)pyridinium-l-yl]phenolate (2), l-(4-dimethylaminophenyl)-2-nitroethylene (3), and l-(4-dimethylaminophenyl)-2-nitropropene (4) was investigated. The dyes are very soluble in gasoline-ethanol mixtures. The data show the occurrence of strong preferential solvation of the dyes by ethanol in all mixtures. Solutions of dye 2 are blue-green in gasoline, violet in ethanol, and green-blue in gasoline with 25 percent of ethanol, which allows a naked-eye detection of the presence of ethanol in gasoline. Also, the use of solvatochromic dyes to develop an analytical method for the determination of the quality of fuels is discussed.
机译:在纯汽油中添加乙醇对染料2,6-二苯基-4-(2,4,6-三苯基吡啶-1-基)酚盐(1),2,6-二(4-terf-丁基苯基)-4- [2,4,6-三(4-叔丁基苯基)吡啶-1-基]酚盐(2),1-(4-二甲基氨基苯基)-2-硝基乙烯(3)和1-(研究了4-二甲基氨基苯基)-2-硝基丙烯(4)。染料非常溶于汽油-乙醇混合物。数据显示在所有混合物中,染料均会被乙醇强烈强烈地优先溶解。染料2的溶液是汽油中的蓝绿色,乙醇中的紫罗兰色和含25%乙醇的汽油中的蓝绿色,可以肉眼检测汽油中乙醇的存在。此外,还讨论了使用溶剂变色染料开发用于确定燃料质量的分析方法。

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