Photoinduoed reaction of chloranil (TCBQ) with 2-methylfuran la and 2,5-dimethylfuran 1b in benzene gave addition products 2a and 2b respecvely together with tetrachlorohydroquinone 3. A mechanism of sequential electr...Photoinduoed reaction of chloranil (TCBQ) with 2-methylfuran la and 2,5-dimethylfuran 1b in benzene gave addition products 2a and 2b respecvely together with tetrachlorohydroquinone 3. A mechanism of sequential electron and proton transfer from la or 1b to ~3TCBQ followed by coupling of the furfuryl and semiquinone radical pairs was proposed and is evidenced by the photo-CIDNP studies of the TCBQ-1a and TCBQ-1b systems.展开更多
Pentachlorophenol（PCP）has been extensively used as a fungicide,bactericide,herbicide,molluscicide.algaecide and insecticide worldwide（Ahlborg and Thunberg,1980：Choudhury et al.,1986）.Although PCP is primarily use...Pentachlorophenol（PCP）has been extensively used as a fungicide,bactericide,herbicide,molluscicide.algaecide and insecticide worldwide（Ahlborg and Thunberg,1980：Choudhury et al.,1986）.Although PCP is primarily used as a preservative for wood and wood products,it has been also used in a variety of other products,including adhesives,construction materials,leather and paper.展开更多
建立了一种基于荷移反应的高效液相色谱测定氨基丁醇含量的分析方法。在p H 8.4的硼砂-硼酸缓冲溶液中,氨基丁醇与四氯苯醌于60℃反应60 min,利用高效液相色谱法-紫外检测器进行分析。荷移络合物采用Agilent Ex tend C18色谱柱(250 m m&...建立了一种基于荷移反应的高效液相色谱测定氨基丁醇含量的分析方法。在p H 8.4的硼砂-硼酸缓冲溶液中,氨基丁醇与四氯苯醌于60℃反应60 min,利用高效液相色谱法-紫外检测器进行分析。荷移络合物采用Agilent Ex tend C18色谱柱(250 m m×4.6 m m,5μm)分离,以0.001%(体积分数)三乙胺甲醇溶液为流动相进行梯度洗脱,流速为1 m L/min,检测波长为350 nm。该方法对氨基丁醇的定量限为0.01 g/L,线性范围为0.1~0.6g/L,相关系数(R^2)为0.999 4;方法的加标回收率为98.3%~103.6%,相对标准偏差(RSD)为0.9%~1.6%。该法简便快捷,适用于氨基丁醇含量的快速检测。展开更多
文摘Photoinduoed reaction of chloranil (TCBQ) with 2-methylfuran la and 2,5-dimethylfuran 1b in benzene gave addition products 2a and 2b respecvely together with tetrachlorohydroquinone 3. A mechanism of sequential electron and proton transfer from la or 1b to ~3TCBQ followed by coupling of the furfuryl and semiquinone radical pairs was proposed and is evidenced by the photo-CIDNP studies of the TCBQ-1a and TCBQ-1b systems.
基金Alberta Health,the Natural Sciences and Engineering Research Council of Canada,and the University of Alberta for their support
文摘Pentachlorophenol（PCP）has been extensively used as a fungicide,bactericide,herbicide,molluscicide.algaecide and insecticide worldwide（Ahlborg and Thunberg,1980：Choudhury et al.,1986）.Although PCP is primarily used as a preservative for wood and wood products,it has been also used in a variety of other products,including adhesives,construction materials,leather and paper.
文摘建立了一种基于荷移反应的高效液相色谱测定氨基丁醇含量的分析方法。在p H 8.4的硼砂-硼酸缓冲溶液中,氨基丁醇与四氯苯醌于60℃反应60 min,利用高效液相色谱法-紫外检测器进行分析。荷移络合物采用Agilent Ex tend C18色谱柱(250 m m×4.6 m m,5μm)分离,以0.001%(体积分数)三乙胺甲醇溶液为流动相进行梯度洗脱,流速为1 m L/min,检测波长为350 nm。该方法对氨基丁醇的定量限为0.01 g/L,线性范围为0.1~0.6g/L,相关系数(R^2)为0.999 4;方法的加标回收率为98.3%~103.6%,相对标准偏差(RSD)为0.9%~1.6%。该法简便快捷,适用于氨基丁醇含量的快速检测。
