A surface-renewable tris(1, 10-phenanthroline-5,6-dione)iron (Ⅱ)hexafluorophosphate (FePD) modified carbon ceramic electrode was constructed by dispersing FePD andgraphite powder in methyltrimethoxysilane (MTMOS) bas...A surface-renewable tris(1, 10-phenanthroline-5,6-dione)iron (Ⅱ)hexafluorophosphate (FePD) modified carbon ceramic electrode was constructed by dispersing FePD andgraphite powder in methyltrimethoxysilane (MTMOS) based gels. The FePD-modified electrode presentedpH-dependent voltammetric behavior, and its peak currents were diffusion-controlled in 0.1 mol/LNa_2SO_4 + H_2SO_4 solution (pH = 0.4). In the presence of iodate, clear electrocatalytic reductionwaves were observed and thus the chemically modified electrode was used as an amperometric sensorfor iodate in common salt. The linear range, sensitivity, detection limit and response time of theiodate sensor were 5 x 10^(-6)―1 x 10~2 mol/L, 7.448 μA·L/mmol, 1.2 x 10^(-6) mol/L and 5 s,respectively. A distinct advantage of this sensor is its good reproducibility of surface-renewal bysimple mechanical polishing.展开更多
The light emission produced by thiourea in oxidation process by permanganate in acidic solution in the presence of Ru(phen) 2+ 3 is used to determine 1.0×10 -8 \|1.0×10 -5 mol/L thiourea. The ...The light emission produced by thiourea in oxidation process by permanganate in acidic solution in the presence of Ru(phen) 2+ 3 is used to determine 1.0×10 -8 \|1.0×10 -5 mol/L thiourea. The limit of detection is 9.8×10 -9 mol/L and the relative standard deviation is 1.1% for a 1.0×10 -5 mol/L thiourea solution ( n =10). The method was applied satisfactorily to the determination of thiourea.展开更多
实验主要研究了磷酸三(1,3-二溴丙基)酯(TDCPP)全生命周期暴露对斑马鱼子代甲状腺功能的干扰.实验设置0、1、3、5、10、50μg/L浓度暴露组,分别考察暴露150 d F1代幼鱼急性发育毒性、甲状腺激素水平的变化以及功能基因的表达.结果如下:...实验主要研究了磷酸三(1,3-二溴丙基)酯(TDCPP)全生命周期暴露对斑马鱼子代甲状腺功能的干扰.实验设置0、1、3、5、10、50μg/L浓度暴露组,分别考察暴露150 d F1代幼鱼急性发育毒性、甲状腺激素水平的变化以及功能基因的表达.结果如下:全生命周期暴露TDCPP能够影响子代幼鱼的发育,表现为存活率降低、畸形率增加、孵化率降低以及体长受到显著的抑制.同时,全生命周期暴露TDCPP能够影响子代幼鱼甲状腺功能,表现为T3增加,T4降低,甲状腺系统功能的有效生物标志物tg基因表达上调,ttr基因表达下调,说明母体暴露TDCPP能够诱发子代产生甲状腺内分泌干扰效应.展开更多
将三(1-氧代-1-磷杂-2,6,7-三氧杂双环[2,2,2]辛烷-4-亚甲基)磷酸酯(trimer)用于阻燃聚碳酸酯(PC),研究了它对 PC 阻燃性能、机械性能、热分解行为及灼烧残炭的影响。将 trimer 用于 PC 时,其质量分数为8%的用量即可使 PC 的阻燃级别达...将三(1-氧代-1-磷杂-2,6,7-三氧杂双环[2,2,2]辛烷-4-亚甲基)磷酸酯(trimer)用于阻燃聚碳酸酯(PC),研究了它对 PC 阻燃性能、机械性能、热分解行为及灼烧残炭的影响。将 trimer 用于 PC 时,其质量分数为8%的用量即可使 PC 的阻燃级别达到 UL 94 V-O(试样厚度为3.2 mm)级,极限氧指数达33%。值得注意的是,加入 trimer 可改善 PC 的拉伸强度,特别是弯曲强度及弯曲模量。热分析数据表明,trimer 可提前并加速 PC 的交联成炭,但不能提高PC 的成炭率。此外,扫描电子最微镜照片显示,trimer 可使炭层轻微发泡膨胀,也可改善炭层质量。展开更多
Hydrothermal reactions of two imidazole derivatives （1,3,5-tib = 1,3,5-tris（1H- imidazol- 1 -yl）benzene, 1,4-bimb = 1,4-bis（1 H-imidazol- 1 -ylmethyl）benzene） and the ZnⅡ cations in the presence of oxalic acid ...Hydrothermal reactions of two imidazole derivatives （1,3,5-tib = 1,3,5-tris（1H- imidazol- 1 -yl）benzene, 1,4-bimb = 1,4-bis（1 H-imidazol- 1 -ylmethyl）benzene） and the ZnⅡ cations in the presence of oxalic acid （H2ox） afford two coordination polymers, namely, {[Zn（ox）（1,3,5- tib）]·2（H20）}n （1） and [Znl.5（OX）1.5（1,4-bimb）l.5]n （2）. Their structures have been determined by single-crystal X-ray diffraction analyses, elemental analyses, IR spectra, and powder X-ray diffraction （PXRD） analyses. Both complexes 1 and 2 are based on the 1D zigzag [Zn（ox）]n chains, and their final structures are controlled by the two different imidazole linkers, which expanded the structure along different directions, finally giving a 3D dia net for 1 and a 2D sql layer for 2. Moreover, the luminescent properties of 1 and 2 have been investigated.展开更多
基金theMinistryofScienceandTechnologyofChina (No .2 0 0 1BA2 10A0 4 )
文摘A surface-renewable tris(1, 10-phenanthroline-5,6-dione)iron (Ⅱ)hexafluorophosphate (FePD) modified carbon ceramic electrode was constructed by dispersing FePD andgraphite powder in methyltrimethoxysilane (MTMOS) based gels. The FePD-modified electrode presentedpH-dependent voltammetric behavior, and its peak currents were diffusion-controlled in 0.1 mol/LNa_2SO_4 + H_2SO_4 solution (pH = 0.4). In the presence of iodate, clear electrocatalytic reductionwaves were observed and thus the chemically modified electrode was used as an amperometric sensorfor iodate in common salt. The linear range, sensitivity, detection limit and response time of theiodate sensor were 5 x 10^(-6)―1 x 10~2 mol/L, 7.448 μA·L/mmol, 1.2 x 10^(-6) mol/L and 5 s,respectively. A distinct advantage of this sensor is its good reproducibility of surface-renewal bysimple mechanical polishing.
文摘The light emission produced by thiourea in oxidation process by permanganate in acidic solution in the presence of Ru(phen) 2+ 3 is used to determine 1.0×10 -8 \|1.0×10 -5 mol/L thiourea. The limit of detection is 9.8×10 -9 mol/L and the relative standard deviation is 1.1% for a 1.0×10 -5 mol/L thiourea solution ( n =10). The method was applied satisfactorily to the determination of thiourea.
文摘实验主要研究了磷酸三(1,3-二溴丙基)酯(TDCPP)全生命周期暴露对斑马鱼子代甲状腺功能的干扰.实验设置0、1、3、5、10、50μg/L浓度暴露组,分别考察暴露150 d F1代幼鱼急性发育毒性、甲状腺激素水平的变化以及功能基因的表达.结果如下:全生命周期暴露TDCPP能够影响子代幼鱼的发育,表现为存活率降低、畸形率增加、孵化率降低以及体长受到显著的抑制.同时,全生命周期暴露TDCPP能够影响子代幼鱼甲状腺功能,表现为T3增加,T4降低,甲状腺系统功能的有效生物标志物tg基因表达上调,ttr基因表达下调,说明母体暴露TDCPP能够诱发子代产生甲状腺内分泌干扰效应.
文摘将三(1-氧代-1-磷杂-2,6,7-三氧杂双环[2,2,2]辛烷-4-亚甲基)磷酸酯(trimer)用于阻燃聚碳酸酯(PC),研究了它对 PC 阻燃性能、机械性能、热分解行为及灼烧残炭的影响。将 trimer 用于 PC 时,其质量分数为8%的用量即可使 PC 的阻燃级别达到 UL 94 V-O(试样厚度为3.2 mm)级,极限氧指数达33%。值得注意的是,加入 trimer 可改善 PC 的拉伸强度,特别是弯曲强度及弯曲模量。热分析数据表明,trimer 可提前并加速 PC 的交联成炭,但不能提高PC 的成炭率。此外,扫描电子最微镜照片显示,trimer 可使炭层轻微发泡膨胀,也可改善炭层质量。
基金supported by the National Natural Science Foundation of China(20873150)the Natural Science Foundation of Shandong Province(ZR2010BL012,ZR2010BQ023)
文摘Hydrothermal reactions of two imidazole derivatives （1,3,5-tib = 1,3,5-tris（1H- imidazol- 1 -yl）benzene, 1,4-bimb = 1,4-bis（1 H-imidazol- 1 -ylmethyl）benzene） and the ZnⅡ cations in the presence of oxalic acid （H2ox） afford two coordination polymers, namely, {[Zn（ox）（1,3,5- tib）]·2（H20）}n （1） and [Znl.5（OX）1.5（1,4-bimb）l.5]n （2）. Their structures have been determined by single-crystal X-ray diffraction analyses, elemental analyses, IR spectra, and powder X-ray diffraction （PXRD） analyses. Both complexes 1 and 2 are based on the 1D zigzag [Zn（ox）]n chains, and their final structures are controlled by the two different imidazole linkers, which expanded the structure along different directions, finally giving a 3D dia net for 1 and a 2D sql layer for 2. Moreover, the luminescent properties of 1 and 2 have been investigated.
