A mild heteroatom (O-, N-, and S-) methylation protocol using trimethyl phosphate (TMP)-Ca(OH)2 combination

A mild heteroatom methylation protocol using trimethyl phosphate (TMP)-Ca(OH)2 combination has been developed, which proceeds in DMF, or water, or under neat conditions at 80 oC or at room temperature. A series of O-, N- and S-nucleophiles, including phenols, sulfonamides, N-heterocycles such as 9H-carbazole, indole derivatives, 1,8-naphthalimide, and aryl/alkyl thiols are suitable substrates of this protocol. The high efficiency, operational simplicity, scalability, cost-efficiency, and environmental friendly nature of this protocol make it an attractive alternative to the conventional base prompted heteroatom methylation procedures.

Investigating on physical and electrochemical properties of high concentrated electrolytes based on LiBF4 salt for 5 V Li-ion rechargeable batteries

In this work, highly concentrated electrolytes were prepared by dissolving tetrafluoroborate (LiBF4) salt in the two solvents including tetramethylene sulfone (TMS) and trimethyl phosphate (TMP) with different mole ratios. The results indicated that the electrolyte LiBF4/TMS (1:3) (~3.4 M) possessed the highest oxidation stability of 6.2 V (vs. Li+/Li) and high ionic conductivity of 1.0 mS/cm that could be promising for high voltage Li-ion batteries operated in the voltage range of 3.5-4.9 V. The electrolyte compatibility with high voltage cathode Li || LiNi0.5Mn1.5O4 (LNMO) was evaluated in coin-cell configuration, which displayed high reversible discharge capacity of 113 mAh/g in the first cycle and high initial Coulombic efficiency >91% and remained >80% of the initial capacity at the 100th cycle. By using the cyclic voltammetry (CV) method, the diffusion coefficient was also calculated as about 4.51×10-11 cm2/s.

High-voltage and intrinsically safe supercapacitors based on a trimethyl phosphate electrolyte

The trimethyl phosphate-based electrolyte system can be considered as a promising candidate for high-voltage and intrinsically safe supercapacitors.

Kinetics of the gas-phase reaction of hydroxyl radicals with trimethyl phosphate over the 273–837 K temperature range

Rate constant of reaction 1 at 1 bar, over the temperature range 273–837 K.