为合成新型精细化工品和功能高分子中间体,研究了磷钨杂多酸(PW)催化下芘与乙酰氯的Friedel-Craft酰基化反应,合成了新型精细化工产品及功能高分子中间体1-乙酰芘。用GC法考察了不同反应条件对1-乙酰芘收率和选择性的影响,当溶剂为1,2-...为合成新型精细化工品和功能高分子中间体,研究了磷钨杂多酸(PW)催化下芘与乙酰氯的Friedel-Craft酰基化反应,合成了新型精细化工产品及功能高分子中间体1-乙酰芘。用GC法考察了不同反应条件对1-乙酰芘收率和选择性的影响,当溶剂为1,2-二氯乙烷,催化剂PW质量分数为8%,n(芘)∶n(乙酰氯)=1∶6,反应温度60℃,反应时间8h时,1-乙酰芘收率可达79.2%,选择性100%。且PW对环境污染小,并可循环使用。采用萃取、重结晶等方法得到了1-乙酰芘纯品,通过GC、GC/MS、FT IR和1 H NMR对该产物进行了定性和定量分析。展开更多
为合成新型精细化工产品和功能高分子中间体,研究了氯代1-乙基3-甲基咪唑-三氯化铝([Emim]Cl-AlCl3)离子液体催化下,苊与苯甲酰氯的Friedel-Craft酰基化反应,GC-MS分析发现生成了5-苯甲酰基苊.通过正交试验,得到该酰基化反应的最优条件...为合成新型精细化工产品和功能高分子中间体,研究了氯代1-乙基3-甲基咪唑-三氯化铝([Emim]Cl-AlCl3)离子液体催化下,苊与苯甲酰氯的Friedel-Craft酰基化反应,GC-MS分析发现生成了5-苯甲酰基苊.通过正交试验,得到该酰基化反应的最优条件为:n(苊)∶n(苯甲酰氯)∶n([Emim]Cl-AlCl3)=1∶2∶1,反应温度35℃,反应时间45 min.此条件下,5-苯甲酰基苊的收率可达88.6%.[Emim]Cl-AlCl3离子液体5次循环使用后,5-苯甲酰基苊的收率变化很小.经萃取、重结晶等方法得到了5-苯甲酰基苊纯产品,并通过mp测定、GC/MS、FT-IR和1 H NMR对该产物进行了定性和定量分析.展开更多
We introduce bivariate normal distribution operator for state vector [ψ) and find that its marginal distribution leads to one-dimensional normal distribution corresponding to the measurement probability |λ,v〈x|...We introduce bivariate normal distribution operator for state vector [ψ) and find that its marginal distribution leads to one-dimensional normal distribution corresponding to the measurement probability |λ,v〈x|.ψ〉|^2, where |x〉λ,v is the coordinate-momentum intermediate representation. As a by-product, the one-dimensional normal distribution in statistics can be explained as a Radon transform of two-dimensional Gaussian function.展开更多
The lumped time distribution functions were proposed, which can be used for describing the dynamicsystems with two or more than two states of the end of growing polymer chain during chain addition polymerization.Numer...The lumped time distribution functions were proposed, which can be used for describing the dynamicsystems with two or more than two states of the end of growing polymer chain during chain addition polymerization.Numerical analysis of the lumped time distribution functions was carried out. The method for calculating molecularweight distribution of polymer in the stable free radical polymerization and more general cases was developed basedon the lumped time distribution functions.展开更多
文摘为合成新型精细化工品和功能高分子中间体,研究了磷钨杂多酸(PW)催化下芘与乙酰氯的Friedel-Craft酰基化反应,合成了新型精细化工产品及功能高分子中间体1-乙酰芘。用GC法考察了不同反应条件对1-乙酰芘收率和选择性的影响,当溶剂为1,2-二氯乙烷,催化剂PW质量分数为8%,n(芘)∶n(乙酰氯)=1∶6,反应温度60℃,反应时间8h时,1-乙酰芘收率可达79.2%,选择性100%。且PW对环境污染小,并可循环使用。采用萃取、重结晶等方法得到了1-乙酰芘纯品,通过GC、GC/MS、FT IR和1 H NMR对该产物进行了定性和定量分析。
文摘为合成新型精细化工产品和功能高分子中间体,研究了氯代1-乙基3-甲基咪唑-三氯化铝([Emim]Cl-AlCl3)离子液体催化下,苊与苯甲酰氯的Friedel-Craft酰基化反应,GC-MS分析发现生成了5-苯甲酰基苊.通过正交试验,得到该酰基化反应的最优条件为:n(苊)∶n(苯甲酰氯)∶n([Emim]Cl-AlCl3)=1∶2∶1,反应温度35℃,反应时间45 min.此条件下,5-苯甲酰基苊的收率可达88.6%.[Emim]Cl-AlCl3离子液体5次循环使用后,5-苯甲酰基苊的收率变化很小.经萃取、重结晶等方法得到了5-苯甲酰基苊纯产品,并通过mp测定、GC/MS、FT-IR和1 H NMR对该产物进行了定性和定量分析.
基金supported by National Natural Science Foundation of China under Grant No.10574647
文摘We introduce bivariate normal distribution operator for state vector [ψ) and find that its marginal distribution leads to one-dimensional normal distribution corresponding to the measurement probability |λ,v〈x|.ψ〉|^2, where |x〉λ,v is the coordinate-momentum intermediate representation. As a by-product, the one-dimensional normal distribution in statistics can be explained as a Radon transform of two-dimensional Gaussian function.
文摘The lumped time distribution functions were proposed, which can be used for describing the dynamicsystems with two or more than two states of the end of growing polymer chain during chain addition polymerization.Numerical analysis of the lumped time distribution functions was carried out. The method for calculating molecularweight distribution of polymer in the stable free radical polymerization and more general cases was developed basedon the lumped time distribution functions.
基金supported by the National Natural Science Foundation of China(No.81560231,81860251)“13th Five-Year”Science and Technology Project of Department of Education,Jilin Province(No.JJKH20200526KJ)the open funds of the State Key Laboratory of Medical Neurobiology,Fudan University,China。