2,2,3,3-tetrafluoropropyl acrylate(TFPA)was prepared by esterification of acrylic acid and 2,2,3,3-tetrafluoropropanol in the presence of polymerization retarder,dehydration agent and concentrated sulfuric acid.The ef...2,2,3,3-tetrafluoropropyl acrylate(TFPA)was prepared by esterification of acrylic acid and 2,2,3,3-tetrafluoropropanol in the presence of polymerization retarder,dehydration agent and concentrated sulfuric acid.The effect of polymerization retarader,the amount of sulfuric acid and reaction duration on the yield of TFPA was reported.The results showed that the yield of TPFE was 65～70% based on the theoretical calculation under optimized experimental conditions.展开更多
One\|pot”reaction of 1,3,5 tribromobenzene with nonylmagnesium bromide,prepared by 1\|bromononane with magnesium in THF,catalyzed by Ni(PPh\-3)\-2Cl\-2,was used to obtain hyperbranched polyphenylene 1.The macromolecu...One\|pot”reaction of 1,3,5 tribromobenzene with nonylmagnesium bromide,prepared by 1\|bromononane with magnesium in THF,catalyzed by Ni(PPh\-3)\-2Cl\-2,was used to obtain hyperbranched polyphenylene 1.The macromolecule was characterized by GPC with molecular weight M n=4247 and polydispersity PD =1 36.Under the conditin of Heck reaction catalyzed by palladium\|complexes,the terminal bromine groups on this macromolecule coupled with styrene and phenylacetylene,respectively,to provide correspondign hyperbranched polyphenylene 2 and 3 with stilbenyl and diphenylacetyl fluorophores on their surface.These two polymers both exhibited two bands E\-1 and E\-2 at near 260 nm and 300 nm in their UV spectra.In their powder photoluminescence spectra,the maximum emitting peaks at 401 nm and 386 nm in the range of blue luminescence were observed,respectively.展开更多
文摘2,2,3,3-tetrafluoropropyl acrylate(TFPA)was prepared by esterification of acrylic acid and 2,2,3,3-tetrafluoropropanol in the presence of polymerization retarder,dehydration agent and concentrated sulfuric acid.The effect of polymerization retarader,the amount of sulfuric acid and reaction duration on the yield of TFPA was reported.The results showed that the yield of TPFE was 65～70% based on the theoretical calculation under optimized experimental conditions.
文摘One\|pot”reaction of 1,3,5 tribromobenzene with nonylmagnesium bromide,prepared by 1\|bromononane with magnesium in THF,catalyzed by Ni(PPh\-3)\-2Cl\-2,was used to obtain hyperbranched polyphenylene 1.The macromolecule was characterized by GPC with molecular weight M n=4247 and polydispersity PD =1 36.Under the conditin of Heck reaction catalyzed by palladium\|complexes,the terminal bromine groups on this macromolecule coupled with styrene and phenylacetylene,respectively,to provide correspondign hyperbranched polyphenylene 2 and 3 with stilbenyl and diphenylacetyl fluorophores on their surface.These two polymers both exhibited two bands E\-1 and E\-2 at near 260 nm and 300 nm in their UV spectra.In their powder photoluminescence spectra,the maximum emitting peaks at 401 nm and 386 nm in the range of blue luminescence were observed,respectively.
