| 摘要: |
| 以2,6-二甲基吡啶为原料,通过氧化、酯化、羟甲基化、卤代、Wittig反应,最后进行甲基化反应得到甲基吡啶盐.该吡啶盐具有明显的溶致变色现象,可用于普通有机溶剂中含水量的检测,其中在四氢呋喃中水含量的检出极限(DL)为0.0293%,优于目前的文献报道值.通过非线性拟合得出了可见光区域的最大吸收波长变化与含水量的方程式,根据最大吸收波长的数值可以直接算出溶剂中的含水量,具有很好的实用性.此外,还具有水溶性好、灵敏度高、响应迅速等一系列优点,具有很好的应用前景. |
| 关键词: 吡啶盐 有机溶剂 水含量 检测 |
| DOI： |
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| 基金项目:上海师范大学重点学科项目(DZL123);上海市教委科研创新项目(13ZZ105);上海师范大学大学生创新创业活动计划项目 |
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| A novel methyl pyridinium salt for the detection of water content in organic solvents |
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ZHANG Mingyu, ZHUANG Zhuli, MA Xiaodong, CAI Xinjia, QIAO Yu, ZHU Linjia, QIU Jiaxin, TANG Zhihui, XIAO Haibo
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College of Life and Environmental Sciences,Shanghai Normal University
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| Abstract: |
| A novel pyridinium salt,TM was synthesized from 2,6-dimethylpyridin.TM exhibits pronounced negative solvatochromism and possesses high absorption spectral sensitivities to water content changes.TM could be used to measure the water content in organic solvents such as THF,1,4-dioxane,acetone,and methanol.The detection limit was 0.04% for THF.The calibration curve for the determination of water in THF was obtained.TM exhibited high selectivity and sensitivity in the absorbance detection of water in organic solvents. |
| Key words: pyridinium salt organic solvent water content detection |
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