Adsorption of Cr(Ⅵ) and p-chloroaniline on three typical soil colloids and pH influence were studied using batch equilibrium method. Both of Cr(Ⅵ) and p-chloroaniline adsorption on the colloids could be well describ...Adsorption of Cr(Ⅵ) and p-chloroaniline on three typical soil colloids and pH influence were studied using batch equilibrium method. Both of Cr(Ⅵ) and p-chloroaniline adsorption on the colloids could be well described by general adsorption simulation equations. The adsorption processes changed with media pH. When Cr(Ⅵ) and p-chloroaniline coexisted on soil colloids, their interactions could be observed in a certain pH range to be accompanied with Cr(Ⅵ) reduction, which clearly suggested that a surface catalytic reaction occurred in this system. Soil colloid acted as an efficient catalyst for the interaction of Cr(Ⅵ) and p-chloroaniline. The pH values at which no interaction was observed were 4.0, 4.5 and 5.0 for the colloids of indigotic black soil, yellow-brown soil and latosol, respectively. Capillary electrophoresis used to analyze p-chloroaniline provided a high separation efficiency and short separation time, and needed no more extensive pretreatment of samples.展开更多
A novel phosphorus-containing copolycarbonate was synthesized from bisphenol-A,2-（6-oxido-6H-dibenz<c,e><1,2>oxa phosphorin-6-yl）-1,4-dihydroxy phenylene（ODOP-HQ） and triphosgene by interfacial polycon...A novel phosphorus-containing copolycarbonate was synthesized from bisphenol-A,2-（6-oxido-6H-dibenz<c,e><1,2>oxa phosphorin-6-yl）-1,4-dihydroxy phenylene（ODOP-HQ） and triphosgene by interfacial polycondensation,and a copolycarbonate with an inherent viscosity of 0.53 dL/g was obtained.The（copolymer） was characterized by elemental analysis,FT-IR,DSC,TGA,and NMR.DSC result shows that the Tg of the copolycarbonate is 149 ℃,which is higher than that of normal PC.The TGA（result） shows that the onset decomposition temperature of the copolycarbonate is 355 ℃,which indicates it（possesses） a good thermal stability.展开更多
Eight 5-substituted-1,3,4-oxadiazole-2-ones were synthesized using substituted benzoic hydrazides as starting materials and triphosgene as cyclization reagent at ambient temperature with high purity and good yields.Th...Eight 5-substituted-1,3,4-oxadiazole-2-ones were synthesized using substituted benzoic hydrazides as starting materials and triphosgene as cyclization reagent at ambient temperature with high purity and good yields.Their structures were characterized by IR,MS,1H NMR and elemental analysis.The salient features of this method included the simple reaction set-ups,safety,short reaction time and high yields of products.展开更多
文摘Adsorption of Cr(Ⅵ) and p-chloroaniline on three typical soil colloids and pH influence were studied using batch equilibrium method. Both of Cr(Ⅵ) and p-chloroaniline adsorption on the colloids could be well described by general adsorption simulation equations. The adsorption processes changed with media pH. When Cr(Ⅵ) and p-chloroaniline coexisted on soil colloids, their interactions could be observed in a certain pH range to be accompanied with Cr(Ⅵ) reduction, which clearly suggested that a surface catalytic reaction occurred in this system. Soil colloid acted as an efficient catalyst for the interaction of Cr(Ⅵ) and p-chloroaniline. The pH values at which no interaction was observed were 4.0, 4.5 and 5.0 for the colloids of indigotic black soil, yellow-brown soil and latosol, respectively. Capillary electrophoresis used to analyze p-chloroaniline provided a high separation efficiency and short separation time, and needed no more extensive pretreatment of samples.
文摘A novel phosphorus-containing copolycarbonate was synthesized from bisphenol-A,2-（6-oxido-6H-dibenz<c,e><1,2>oxa phosphorin-6-yl）-1,4-dihydroxy phenylene（ODOP-HQ） and triphosgene by interfacial polycondensation,and a copolycarbonate with an inherent viscosity of 0.53 dL/g was obtained.The（copolymer） was characterized by elemental analysis,FT-IR,DSC,TGA,and NMR.DSC result shows that the Tg of the copolycarbonate is 149 ℃,which is higher than that of normal PC.The TGA（result） shows that the onset decomposition temperature of the copolycarbonate is 355 ℃,which indicates it（possesses） a good thermal stability.
文摘Eight 5-substituted-1,3,4-oxadiazole-2-ones were synthesized using substituted benzoic hydrazides as starting materials and triphosgene as cyclization reagent at ambient temperature with high purity and good yields.Their structures were characterized by IR,MS,1H NMR and elemental analysis.The salient features of this method included the simple reaction set-ups,safety,short reaction time and high yields of products.
