文章摘要
曹成,闫盆吉,籍向东,李宽兵,李芳,岳国仁.新型氨基脲衍生物的合成及其阴离子识别性能[J].精细化工,2021,38(2):
新型氨基脲衍生物的合成及其阴离子识别性能
A High Selectivity of New Semicarbazide Derivative for the Recognition of CN-
投稿时间:2020-06-30  修订日期:2020-09-07
DOI:
中文关键词: 氨基脲  阴离子识别  CN-化学传感器  功能材料
英文关键词: semicarbazide  anion recognition  chemosensor for CN-  functional materials
基金项目:国家自然科学基金;甘肃省科技计划资助项目;甘肃省高等学校科研项目;大学生创新创业训练计划项目
作者单位E-mail
曹成 河西学院 caochxu@126.com 
闫盆吉 河西学院  
籍向东 河西学院 jxdsn@163.com 
李宽兵 河西学院  
李芳 河西学院  
岳国仁 Hexi University  
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中文摘要:
      以3-异氰酸丙基三乙氧基硅烷和2, 4-二硝基苯肼为原料,制备了一种氨基脲衍生物阴离子受体R,其结构通过1H/13C NMR等方法表征。在纯DMSO体系下,受体R通过紫外-可见吸收光谱的变化及溶液颜色的显著差别对F-、Ac-和CN-离子表现出良好的识别能力。此外,通过向体系中加入30%的竞争溶剂H2O可以达到对CN-离子的单一识别效应。根据Benesi-Hidebrand方程,受体R单一识别氰根离子的络合常数为8.58 ? 103 L/mol,且检出限为1.47 uM,Job曲线分析证实受体与阴离子的结合比为1 : 1。利用1H NMR滴定实验及理论计算表明受体R与阴离子是以氢键形式相结合的识别机制,未发现脱质子过程。
英文摘要:
      A semicarbazide derivative R has been synthesized using 3-propyl isocyanate triethoxysilane and 2, 4-Dinitrophenylhydrazine as raw material and characterized by 1H/13C NMR and other methods. The receptor R exhibited excellent recognition capability for F-, Ac- and CN- by obvious changes of UV-Vis spectral and solution color in DMSO solution. In addition, The single recognition effect of the receptor R on CN- can be achieved by adding 30% of the competitive solvent H2O to the DMSO system. According to the Benesi-Hidebrand equation, receptor R recognized CN- with a complex constant of 8.58 ? 103 L/mol and a detection limit of 1.47 uM, and form a 1 : 1 hydrogen bond complex with anions by Job curve. The recognition mechanism of receptor R and anion using hydrogen bonding was explained through 1H NMR titration and theoretical calculation, and no deprotonation behavior was found.
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