In order to construct the zwitterionic structure of phosphorylcholine onto the surface of biomaterials, five novel phospholanes containing hydroxyl group were synthesized from the corresponding diol and 2-chloro-2-oxo...In order to construct the zwitterionic structure of phosphorylcholine onto the surface of biomaterials, five novel phospholanes containing hydroxyl group were synthesized from the corresponding diol and 2-chloro-2-oxo-1,3,2-dioxaphospholane in the presence of THF. Then, five novel phosphorylcholines containing hydroxyl group were prepared by the corresponding phospholane and anhydrous trimethylamine in the presence of acetonitrile. Their structures were characterized by FTIR, 1H NMR and elemental analysis.展开更多
The two flame retardants of 3a and 3b are synthesized from neopentyl alcohol,phospous oxychloride,1,3-dihydroxybenzene and bisphenol-A by a facile and useful method with the yields of 75.2% and 89.7%.respectively.The ...The two flame retardants of 3a and 3b are synthesized from neopentyl alcohol,phospous oxychloride,1,3-dihydroxybenzene and bisphenol-A by a facile and useful method with the yields of 75.2% and 89.7%.respectively.The structures of the two flame retardants are identified and studied by FT-IR,1H NMR,ESIMS and elementary analysis.Reaction conditions are also optimived.The results of thermal analysis show that they have high thermal stability and excellent char-forming ability.Decomposition temperatures of compound 3a and 3b are 312.36 ℃ and 306.39 ℃,respectively.Residual carbons(w%) of compound 3a and 3b under 500 ℃ are 49%and 32%,respectively.展开更多
A nanosolid heteropoly acid of H 3PW 12 O 40 /SiO 2 was prepared with the sol-gel method and used to catalyze sythesis of methyl 5-amino-1,2,4,-trazolylformate sulfate.The structure of the nanosolid heteropoly acid H ...A nanosolid heteropoly acid of H 3PW 12 O 40 /SiO 2 was prepared with the sol-gel method and used to catalyze sythesis of methyl 5-amino-1,2,4,-trazolylformate sulfate.The structure of the nanosolid heteropoly acid H 3PW 12 O 40 /SiO 2 was characterized by IR,XRD and TEM.The following optimum condition were that the mole ratio of alcohol to carboxylic acid is 27∶1,the temperature is 75℃,the reaction time is 5 hours,and the catalyst is 2 5% of feedstock.Under the optimum conditions,the yield of esters was above 94%.展开更多
文摘In order to construct the zwitterionic structure of phosphorylcholine onto the surface of biomaterials, five novel phospholanes containing hydroxyl group were synthesized from the corresponding diol and 2-chloro-2-oxo-1,3,2-dioxaphospholane in the presence of THF. Then, five novel phosphorylcholines containing hydroxyl group were prepared by the corresponding phospholane and anhydrous trimethylamine in the presence of acetonitrile. Their structures were characterized by FTIR, 1H NMR and elemental analysis.
文摘The two flame retardants of 3a and 3b are synthesized from neopentyl alcohol,phospous oxychloride,1,3-dihydroxybenzene and bisphenol-A by a facile and useful method with the yields of 75.2% and 89.7%.respectively.The structures of the two flame retardants are identified and studied by FT-IR,1H NMR,ESIMS and elementary analysis.Reaction conditions are also optimived.The results of thermal analysis show that they have high thermal stability and excellent char-forming ability.Decomposition temperatures of compound 3a and 3b are 312.36 ℃ and 306.39 ℃,respectively.Residual carbons(w%) of compound 3a and 3b under 500 ℃ are 49%and 32%,respectively.
文摘A nanosolid heteropoly acid of H 3PW 12 O 40 /SiO 2 was prepared with the sol-gel method and used to catalyze sythesis of methyl 5-amino-1,2,4,-trazolylformate sulfate.The structure of the nanosolid heteropoly acid H 3PW 12 O 40 /SiO 2 was characterized by IR,XRD and TEM.The following optimum condition were that the mole ratio of alcohol to carboxylic acid is 27∶1,the temperature is 75℃,the reaction time is 5 hours,and the catalyst is 2 5% of feedstock.Under the optimum conditions,the yield of esters was above 94%.
