The branching generation during the free radical copolymerization of chain transfer monomer p-vinyl benzene sulfonyl chloride （VBSC） with styrene was investigated by a simple mathematic model. Chain transfer constan...The branching generation during the free radical copolymerization of chain transfer monomer p-vinyl benzene sulfonyl chloride （VBSC） with styrene was investigated by a simple mathematic model. Chain transfer constant of VBSC was determined to be around 0.3 by fitting the 1H-NMR monitored experimental results with a mathematic model. According to the theoretical analysis, the obtained poIy（VBSC） and its copolymers were substantiated to have a grafting-like main chain with residual pendent sulfonyl chloride groups after consuming most of the vinyl groups. The copolymerization results of VBSC with styrene at varied feed ratios demonstrated that conversion of sulfonyl chloride groups was lower than that of the monomer, which was in agreement with the theoretical results. The glass transition temperature, number average molecular weight and distribution of those obtained polymers were primarily investigated. Comparing with other chain transfer monomers, VBSC has a chain transfer constant much closer to unity therefore a more branched polymer is expected. Additionally, the branched polystyrene with residual sulfonyl chloride groups is hopefully to be further used as ATRP macro- initiators or reactive intermediates to synthesize functional polymers with complex structure.展开更多
A facile synthesis of 3,5-diaryl 1,2,4-selenadiazoles was provided by treatment of aryl selenoamides with p-methylphenyl sulfonyl chloride in chloroform.
We report the novel synthesis of azetidin-2-one derivatives containing aryl sulfonate moiety from the reaction of 2-hydroxy benzaldehyde with p-toluene sulfonyl chloride afforded firstly 2-formylphenyl 4-methylbenzene...We report the novel synthesis of azetidin-2-one derivatives containing aryl sulfonate moiety from the reaction of 2-hydroxy benzaldehyde with p-toluene sulfonyl chloride afforded firstly 2-formylphenyl 4-methylbenzene sulfonate (2). The compound (2) on reaction with p-aminobenzoic acid or 2-aminopyridine gave the corresponding aldimines (3). Furthermore, the aldimines are on reaction with chloroacetyl chloride gives corresponding azetidin-2-ones in good to moderate yield. Among the eight synthesized azetidin-2-ones, five selected compounds have been screened for the an-ti-inflammatory activity, few of them showed good anti-inflammatory activity compared with standard drugs. Anti- microbial activity of all synthesized compounds has been tested and most of the compounds showed good anti-bacterial and anti-fungal activities.展开更多
采用UASB处理以甲醇为有机溶剂的对乙酰氨基苯璜酰氯(p-ASC)生产废水。通过逐步减少HRT,考察有机负荷(OLR)从2.0 g COD/(L·d)逐步提高到24.0 g COD/(L·d)过程中反应器处理效果的变化。结果表明,在最优的OLR 7.0 g COD/(L·...采用UASB处理以甲醇为有机溶剂的对乙酰氨基苯璜酰氯(p-ASC)生产废水。通过逐步减少HRT,考察有机负荷(OLR)从2.0 g COD/(L·d)逐步提高到24.0 g COD/(L·d)过程中反应器处理效果的变化。结果表明,在最优的OLR 7.0 g COD/(L·d)的条件下,p-ASC和COD的去除率分别能达到76%和100%。虽然进水没有硫酸盐,但是出水却有硫化物和硫酸盐的产生。进一步保持最优的OLR条件下的HRT(0.45 d)不变,逐步增加进水p-ASC浓度到1 100 mg/L,产甲烷菌没有发现受到抑制。持续增加进水硫酸盐浓度到3 000 mg/L,发现硫酸盐还原菌没有受到抑制,但是产甲烷菌却受到抑制,最后减少硫酸盐浓度到1 000 mg/L,厌氧系统在1周后几乎完全恢复。展开更多
基金supported by the National Natural Science Foundation of China(No.51003091)the Education Research Foundation of Yunnan Province(No.2010Y240)+1 种基金the Research Foundation of Yunnan University(No.2009B06Q)the Backbone Teacher Training Program of Yunnan University(No.21132014)
文摘The branching generation during the free radical copolymerization of chain transfer monomer p-vinyl benzene sulfonyl chloride （VBSC） with styrene was investigated by a simple mathematic model. Chain transfer constant of VBSC was determined to be around 0.3 by fitting the 1H-NMR monitored experimental results with a mathematic model. According to the theoretical analysis, the obtained poIy（VBSC） and its copolymers were substantiated to have a grafting-like main chain with residual pendent sulfonyl chloride groups after consuming most of the vinyl groups. The copolymerization results of VBSC with styrene at varied feed ratios demonstrated that conversion of sulfonyl chloride groups was lower than that of the monomer, which was in agreement with the theoretical results. The glass transition temperature, number average molecular weight and distribution of those obtained polymers were primarily investigated. Comparing with other chain transfer monomers, VBSC has a chain transfer constant much closer to unity therefore a more branched polymer is expected. Additionally, the branched polystyrene with residual sulfonyl chloride groups is hopefully to be further used as ATRP macro- initiators or reactive intermediates to synthesize functional polymers with complex structure.
文摘A facile synthesis of 3,5-diaryl 1,2,4-selenadiazoles was provided by treatment of aryl selenoamides with p-methylphenyl sulfonyl chloride in chloroform.
文摘We report the novel synthesis of azetidin-2-one derivatives containing aryl sulfonate moiety from the reaction of 2-hydroxy benzaldehyde with p-toluene sulfonyl chloride afforded firstly 2-formylphenyl 4-methylbenzene sulfonate (2). The compound (2) on reaction with p-aminobenzoic acid or 2-aminopyridine gave the corresponding aldimines (3). Furthermore, the aldimines are on reaction with chloroacetyl chloride gives corresponding azetidin-2-ones in good to moderate yield. Among the eight synthesized azetidin-2-ones, five selected compounds have been screened for the an-ti-inflammatory activity, few of them showed good anti-inflammatory activity compared with standard drugs. Anti- microbial activity of all synthesized compounds has been tested and most of the compounds showed good anti-bacterial and anti-fungal activities.
文摘采用UASB处理以甲醇为有机溶剂的对乙酰氨基苯璜酰氯(p-ASC)生产废水。通过逐步减少HRT,考察有机负荷(OLR)从2.0 g COD/(L·d)逐步提高到24.0 g COD/(L·d)过程中反应器处理效果的变化。结果表明,在最优的OLR 7.0 g COD/(L·d)的条件下,p-ASC和COD的去除率分别能达到76%和100%。虽然进水没有硫酸盐,但是出水却有硫化物和硫酸盐的产生。进一步保持最优的OLR条件下的HRT(0.45 d)不变,逐步增加进水p-ASC浓度到1 100 mg/L,产甲烷菌没有发现受到抑制。持续增加进水硫酸盐浓度到3 000 mg/L,发现硫酸盐还原菌没有受到抑制,但是产甲烷菌却受到抑制,最后减少硫酸盐浓度到1 000 mg/L,厌氧系统在1周后几乎完全恢复。
