The new room-temperature molten salt was prepared based on LiTFSI[LiNC(SO 2CF 3) 2] with OZO(C 3H 5NO 2) which were not reported in literature. Its thermal and electrochemical properties were studied by differential s...The new room-temperature molten salt was prepared based on LiTFSI[LiNC(SO 2CF 3) 2] with OZO(C 3H 5NO 2) which were not reported in literature. Its thermal and electrochemical properties were studied by differential scanning calorimetry, ac impedance spectroscopy and cyclic voltammertry respectively. The results indicated that the structure symmetry of the molecule was depressed and the extent of charges delocalization was expanded, because of introducing oxygen atom of differential electronegativity in OZO molecule. DSC analysis showed that the LiTFSI-OZO molten salt has the excellent thermal stability and its eutectic temperature is below about 223.15 K. Meanwhile, the conductivity of LiTFSI-OZO molten salt at a molar ratio of 1∶4.5 is 0.75×10 -3 S/cm at 298.15 K and 3.50×10 -3 S/cm at 333.15 K. CV analysis showed that the electrochemical window of the sample is about 4 V.展开更多
2,4Dimethyl2(4methyl3Pentenyl)1,3dioxolane were synthesized with the phosphotungstic acid supported on cationic exchange resin as a catalyst.Various factors that affect the condensation yield were inve...2,4Dimethyl2(4methyl3Pentenyl)1,3dioxolane were synthesized with the phosphotungstic acid supported on cationic exchange resin as a catalyst.Various factors that affect the condensation yield were investigated.The results showed that the optimum conditions were as follows:6methyl5heptene2one:1,2Propandiol:catalyst:dehydrating agent is 1 mol:15mol∶12g∶200ml;reaction temperature was reflux temperature;reaction time was 25h.The yield was above 915% under the optimum conditions.The catalyst can be used repeatedly.展开更多
二苯并-1,3-二氧杂-环辛烷-2-羧酸丙酮肟酯(SYP-185)是沈阳化工研究院正在进行前期开发的除草剂。由二苯并-1,3-二氧杂-环辛烷-2-羧酸经两步反应制得,总收率70%。其结构经红外、核磁共振谱和元素分析确证。标题化合物在100 g a.i./hm2...二苯并-1,3-二氧杂-环辛烷-2-羧酸丙酮肟酯(SYP-185)是沈阳化工研究院正在进行前期开发的除草剂。由二苯并-1,3-二氧杂-环辛烷-2-羧酸经两步反应制得,总收率70%。其结构经红外、核磁共振谱和元素分析确证。标题化合物在100 g a.i./hm2剂量下可防多种杂草;在300 g a.i./hm2对小麦安全。展开更多
文摘The new room-temperature molten salt was prepared based on LiTFSI[LiNC(SO 2CF 3) 2] with OZO(C 3H 5NO 2) which were not reported in literature. Its thermal and electrochemical properties were studied by differential scanning calorimetry, ac impedance spectroscopy and cyclic voltammertry respectively. The results indicated that the structure symmetry of the molecule was depressed and the extent of charges delocalization was expanded, because of introducing oxygen atom of differential electronegativity in OZO molecule. DSC analysis showed that the LiTFSI-OZO molten salt has the excellent thermal stability and its eutectic temperature is below about 223.15 K. Meanwhile, the conductivity of LiTFSI-OZO molten salt at a molar ratio of 1∶4.5 is 0.75×10 -3 S/cm at 298.15 K and 3.50×10 -3 S/cm at 333.15 K. CV analysis showed that the electrochemical window of the sample is about 4 V.
文摘2,4Dimethyl2(4methyl3Pentenyl)1,3dioxolane were synthesized with the phosphotungstic acid supported on cationic exchange resin as a catalyst.Various factors that affect the condensation yield were investigated.The results showed that the optimum conditions were as follows:6methyl5heptene2one:1,2Propandiol:catalyst:dehydrating agent is 1 mol:15mol∶12g∶200ml;reaction temperature was reflux temperature;reaction time was 25h.The yield was above 915% under the optimum conditions.The catalyst can be used repeatedly.
文摘二苯并-1,3-二氧杂-环辛烷-2-羧酸丙酮肟酯(SYP-185)是沈阳化工研究院正在进行前期开发的除草剂。由二苯并-1,3-二氧杂-环辛烷-2-羧酸经两步反应制得,总收率70%。其结构经红外、核磁共振谱和元素分析确证。标题化合物在100 g a.i./hm2剂量下可防多种杂草;在300 g a.i./hm2对小麦安全。
