Chloromethylated poly（phthalazinone ether sulfone ketone） （CMPPESK） was prepared from poly（phthalazinone ether sulfone ketone） （PPESK） using chloromethyl octyl ethers （CMOE） with lower toxicity as chlorometh...Chloromethylated poly（phthalazinone ether sulfone ketone） （CMPPESK） was prepared from poly（phthalazinone ether sulfone ketone） （PPESK） using chloromethyl octyl ethers （CMOE） with lower toxicity as chloromethylated regent. CMPPESK was soluble in N-methyl-2-pyrrolidone （NMP）, N,N-dimethylacetamide （DMAc） and chloroform. Quaternized poly（phthalazinone ether sulfone ketone） （QAPPESK） was prepared from CMPPESK by quaternization. QAPPESK had excellent solvent resistance, which was only partly soluble in sulfuric acid （98%） and swollen in N,N-dimethylformamide （DMF）. The vanadium redox flow battery （V-RFB） using QAPPESK anion-exchange membrane had better performance with 88.3% of overall energy efficiency.展开更多
Benzodioxole was monochloromethylated directly by aqueous formaldehyde and hydrogen chloride gas in CCl4 in the presence of quaternary ammonium salts: C16H33-（CH3）3NX（X=Br,Cl）, C12H25（CH3）3NCl,C12H25（CH3）2（C6...Benzodioxole was monochloromethylated directly by aqueous formaldehyde and hydrogen chloride gas in CCl4 in the presence of quaternary ammonium salts: C16H33-（CH3）3NX（X=Br,Cl）, C12H25（CH3）3NCl,C12H25（CH3）2（C6H5CH2）NCl and （C4H9）4NBr. With hexadecyltrimethylammonium bromide at temperature 6065 ℃ and for 15 hours of reaction, 1,3-benzodioxole was converted to piperonyl chloride with conversion more than 98% and selectivity up to 97%. The method has advantages of high selectivity, high conversion, negligible by-products and easy workup of the main product.展开更多
基金partly financed by the Major State Basic Research Development Program of China(No.2003 CB615700)the National Natural Science Foundation of China(No.20604005).
文摘Chloromethylated poly（phthalazinone ether sulfone ketone） （CMPPESK） was prepared from poly（phthalazinone ether sulfone ketone） （PPESK） using chloromethyl octyl ethers （CMOE） with lower toxicity as chloromethylated regent. CMPPESK was soluble in N-methyl-2-pyrrolidone （NMP）, N,N-dimethylacetamide （DMAc） and chloroform. Quaternized poly（phthalazinone ether sulfone ketone） （QAPPESK） was prepared from CMPPESK by quaternization. QAPPESK had excellent solvent resistance, which was only partly soluble in sulfuric acid （98%） and swollen in N,N-dimethylformamide （DMF）. The vanadium redox flow battery （V-RFB） using QAPPESK anion-exchange membrane had better performance with 88.3% of overall energy efficiency.
文摘Benzodioxole was monochloromethylated directly by aqueous formaldehyde and hydrogen chloride gas in CCl4 in the presence of quaternary ammonium salts: C16H33-（CH3）3NX（X=Br,Cl）, C12H25（CH3）3NCl,C12H25（CH3）2（C6H5CH2）NCl and （C4H9）4NBr. With hexadecyltrimethylammonium bromide at temperature 6065 ℃ and for 15 hours of reaction, 1,3-benzodioxole was converted to piperonyl chloride with conversion more than 98% and selectivity up to 97%. The method has advantages of high selectivity, high conversion, negligible by-products and easy workup of the main product.
