溴化N-正丙基吡啶的合成及其在水中的电导率研究

用溴代正丙烷与吡啶合成了离子液体溴化N-正丙基吡啶,并对其结构进行红外光谱表征,表明合成产物为目标产物。对离子液体溴化N-正丙基吡啶进行紫外光谱分析,测定了其在水、乙醇、乙腈三种溶剂中的紫外光谱。实验结果表明离子液体溴化N-正丙基吡啶的紫外吸收光谱受到溶剂极性和酸碱性的影响,在对离子液体与其他溶剂的混合溶液进行紫外光谱分析时,要指明所使用的溶剂。测定了不同质量摩尔浓度离子液体溴化N-正丙基吡啶在水中的电导率,将测得的电导率对质量摩尔浓度进行拟合,得到经验方程式:y=18.903 03-60.532 49/(1+exp((C+0.937 58)/1.073 67)),相关系数为0.999 59,结果表明离子液体溴化N-正丙基吡啶的电导率随质量摩尔浓度的增大而增大。

On preparation and conductivity of N-Propylpyridine bromide

In this paper,the intermediates of ionic liquids N-Propyl Pyridine Bromide is compound by N-propyl bromide and pyridine,and its structure was characterized by infrared spectroscopy.It analyzed the specific location of the peak,then the spectrogram indicating that the synthetic product is the target product.Using the ultraviolet spectrophotometer for N-Propyl Pyridine Bromide to analysis,we determine the ionic liquid N-Propyl Pyridine Bromide in ethanol,methanol,acetonitrile by the ultraviolet spectrum,spectrum analysis can be concluded that: the ionic liquid intermediates N-Propyl Pyridine Bromide ultraviolet absorption spectra by solvent polarity and pH effects.We should pay attention to the use of solvents when the ionic liquid mixture with other solvents for ultraviolet spectra.Conductivity was measured using the different molality of the ionic liquid intermediates N-Propyl Pyridine Bromide in water,and draw the linear whit the molality and conductivity.The empirical equation is y=18.90303-60.53249/(1+exp((C+0.93758)/1.07367)),the correlation coefficient is 0.99959.It can be seen,the conductivity of ionic liquids intermediate N-Propyl Pyridine Bromide increased with the molality and has a good linear relationship.