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
The acylation of isobutylbenzene by using catalytic amount of Bi(OTf) 3 has been investigated as function of reaction time, reaction temperature, catalyst dosage and acetyl chloride. It was found that the catalytic ac...The acylation of isobutylbenzene by using catalytic amount of Bi(OTf) 3 has been investigated as function of reaction time, reaction temperature, catalyst dosage and acetyl chloride. It was found that the catalytic activity of Bi(OTf) 3 could be greatly enhanced in the presence of LiClO 4 in nitromethane. Under the optimum condition: Bi(OTf) 3 20%, 4 mol/L LiClO 4-CH 3NO 2, 8 h and 100 ℃, the yield of 4-isobutylacetophenone was up to 90%.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The acylation of isobutylbenzene by using catalytic amount of Bi(OTf) 3 has been investigated as function of reaction time, reaction temperature, catalyst dosage and acetyl chloride. It was found that the catalytic activity of Bi(OTf) 3 could be greatly enhanced in the presence of LiClO 4 in nitromethane. Under the optimum condition: Bi(OTf) 3 20%, 4 mol/L LiClO 4-CH 3NO 2, 8 h and 100 ℃, the yield of 4-isobutylacetophenone was up to 90%.
