研究了在对甲基苯磺酸的催化作用下,2,2-二羟甲基丙酸与苯乙酮的缩合反应,从催化剂用量,带水剂用量,物料比以及反应时间四个方面对反应条件进行了优化,实验结果表明:对甲基苯磺酸对2,2-二羟甲基丙酸缩环己酮的缩酮化反应具有较好的催化...研究了在对甲基苯磺酸的催化作用下,2,2-二羟甲基丙酸与苯乙酮的缩合反应,从催化剂用量,带水剂用量,物料比以及反应时间四个方面对反应条件进行了优化,实验结果表明:对甲基苯磺酸对2,2-二羟甲基丙酸缩环己酮的缩酮化反应具有较好的催化作用,其最佳反应为:催化剂用量为3%,n(DMPA):n(苯乙酮)=1:1.2,反应时间为7 h,反应温度105℃,带水剂(环已烷)的用量为10 m L,产率为85.18%。展开更多
A new quaternary complex with 2,2-dihydroxymethyl propionic acid and 1,10-phenanthroline, Sm(CH3C(CH2OH)2COO)(NO3)2(phen), was synthesized in ethanol solution and characterized by elemental analysis, IR and solid-stat...A new quaternary complex with 2,2-dihydroxymethyl propionic acid and 1,10-phenanthroline, Sm(CH3C(CH2OH)2COO)(NO3)2(phen), was synthesized in ethanol solution and characterized by elemental analysis, IR and solid-state 13C NMR. The result of molar electrolytic conductivity of the complex indicates that it is non-electrolyte. Solution and thermal properties of the complex further verifies that the complex and ligant are different. In addition, the analytical results also imply that the two hydroxyl groups of 2,2-dihydroxymethyl propionic acid are not involved in the coordinate reaction. This will provide a new way for producing new multifunctional polymer materials with excellent fluorescent property. The fluorescence spectra of the complex were also studied. The main fluorescence emission peak of the complex appeared at 555, 604 and 646 nm. These fluorescent emission peaks correspond to transitions from 4G5/2 to 6H5/2, 6H7/2 and 6H9/2 energy levels of samarium(Ⅲ) ion, respectively. The most intense peak is at 646 nm, which lies in the range of absorption wavelength of chlorophyll a and chlorophyll b (600～680 nm), and it is beneficial to the crops to grow up.展开更多
文摘研究了在对甲基苯磺酸的催化作用下,2,2-二羟甲基丙酸与苯乙酮的缩合反应,从催化剂用量,带水剂用量,物料比以及反应时间四个方面对反应条件进行了优化,实验结果表明:对甲基苯磺酸对2,2-二羟甲基丙酸缩环己酮的缩酮化反应具有较好的催化作用,其最佳反应为:催化剂用量为3%,n(DMPA):n(苯乙酮)=1:1.2,反应时间为7 h,反应温度105℃,带水剂(环已烷)的用量为10 m L,产率为85.18%。
文摘A new quaternary complex with 2,2-dihydroxymethyl propionic acid and 1,10-phenanthroline, Sm(CH3C(CH2OH)2COO)(NO3)2(phen), was synthesized in ethanol solution and characterized by elemental analysis, IR and solid-state 13C NMR. The result of molar electrolytic conductivity of the complex indicates that it is non-electrolyte. Solution and thermal properties of the complex further verifies that the complex and ligant are different. In addition, the analytical results also imply that the two hydroxyl groups of 2,2-dihydroxymethyl propionic acid are not involved in the coordinate reaction. This will provide a new way for producing new multifunctional polymer materials with excellent fluorescent property. The fluorescence spectra of the complex were also studied. The main fluorescence emission peak of the complex appeared at 555, 604 and 646 nm. These fluorescent emission peaks correspond to transitions from 4G5/2 to 6H5/2, 6H7/2 and 6H9/2 energy levels of samarium(Ⅲ) ion, respectively. The most intense peak is at 646 nm, which lies in the range of absorption wavelength of chlorophyll a and chlorophyll b (600～680 nm), and it is beneficial to the crops to grow up.
