第41卷第4期2024年8月J.At.Mol.Phys.,2024,41:046002(6pp)N-丁基吡啶四氟硼酸盐/水二元体系的分子动力学模拟研究王玉"²,朱光来',王晨晨',徐建强',马赵鹏原子与分子物理学报JOURNALOFATOMICANDMOLECULARPHYSICSVol.41No.4Aug.2024(1.安徽师范大学物理系原子与分子物理研究所,芜湖241002;2.安徽达尔智能控制系统股份有限公司研发中心,芜湖241003)摘要:利用分子动力学模拟方法研究了离子液体N-丁基吡啶四氟硼酸盐([BPy]BF4)与Tip4p模型水分子的二元体系的微观结构:比较了各组分间的径向分布函数,结果表明随着离子液体比例的增加,水与阴离子、水与阳离子头部吡啶环、阳离子头部与阴离子上相关原子间的径向分布函数峰值都呈现递增的趋势,而阳离子上丁基链末端碳原子间的径向分布函数没有明显变化;空间分布函数则直观地反映出阴离子主要分布在阳离子的吡啶环周围,水分子在阴离子周围近似呈均等分布,且几率随离子液体比例增大而增加;另外还探讨了不同离子液体比例下的二元体系中氢键的数目和寿命,结果均呈现一定规律的变化关键词:离子液体;分子动力学模拟;径向分布函数;空间分布函数;氢键中图分类号:0641MoleculardynamicssimulationstudyofN-butylpyridinium文献标识码:Atetrafluoroborate/waterbinarysystemD0I:10.19855/j.1000-0364.2024.046002WANGYul.2,ZHUGuang-Lai',WANGChen-Chen',XUJian-Qiang',MAZhao-Peng(1.DepartmentofPhysics,InstituteofAtomicandMolecularPhysics,AnhuiNormalUniversity,Wuhu241002,China;2.ResearchandDevelopmentCenter,AnhuiDarintelligentControlSystemStockCo.,Ld,Wuhu241003,China)Abstract:Moleculardynamicssimulationmethodwasusedtostudythemicroscopicstructureofthebinarysys-temoftheionicliquidN-butylpyridiniumtetrafluoroborate([BPyJBF4)withwater.Radialdistributionfunc-tions(RDFs)fordifferentcomponentswerecompared.Theresultsshowedthat,withtheincreaseofthepropor-tionof[BPy]BF4,thepeaksofRDFsfortwocertainatomsbetweenwatermoleculeandanion,watermoleculeandpyridineringincation,anionandpyridineringincationpresentedanincreasingtrend,butthatoftheter-minalcarbonofthebutylside-chainin[BPy]JBFhadnoobviouschange.Spatialdistributionfunctionsintui-tivelyreflectedthattheanionsweremainlydistributedaroundthepyridineringofthecation,watermo...