A series of isostructural d/f molecular compounds Zn（H2L）Ln（NO3）3·CH3OH（Ln = Dy（1）, Tb（2） and Sm（3）） were synthesized by the introduction of a designed multifunctional ligand N,N？,N？？,N？？？-tetra...A series of isostructural d/f molecular compounds Zn（H2L）Ln（NO3）3·CH3OH（Ln = Dy（1）, Tb（2） and Sm（3）） were synthesized by the introduction of a designed multifunctional ligand N,N？,N？？,N？？？-tetra（2-hydroxy-3-methoxy-5-methylbenzyl）-1,4,7,10-tetraazacyclododecan（H4L = C（44）H（60）N4O8）. In the isostructural molecules, each crystallographically independent Zn2＋ and Ln3＋ centers are connected by two phenolic oxygen atoms. For the six-coordinate Zn-（2＋） ion, the coordination geometry can be viewed as a regular bicapped square pyramid. While for the ten-coordinate Ln-（3＋） ion, if each O,O？-chelated nitrate ligand is seen as a single coordination site, the coordination geometry can be viewed as a distorted pentagonal bipyramid. The fluorescent spectra show that compounds 2 and 3 exhibited characteristic sharp emissions of Tb-（3＋） and Sm-（3＋）, respectively, while compound 1 was found to be a single-component white-light-emitting complex in the solid state. Thermal stabilities of the three compounds were investigated by using thermal gravimetric analysis. In addition, the thermal decomposition of compound 1 was confirmed by temperature-dependent powder X-ray diffraction technique.展开更多
目的:探讨维生素D受体基因FokⅠ酶切位点多态性与胃癌的相关性.方法:随机选取2013-03/2015-05新疆肿瘤医院就诊的维吾尔族胃癌患者147例(A组)及维吾尔族健康对照者151例(B组),采用多聚酶链反应-限制性酶切片段长度多态性方法测定维生素...目的:探讨维生素D受体基因FokⅠ酶切位点多态性与胃癌的相关性.方法:随机选取2013-03/2015-05新疆肿瘤医院就诊的维吾尔族胃癌患者147例(A组)及维吾尔族健康对照者151例(B组),采用多聚酶链反应-限制性酶切片段长度多态性方法测定维生素D受体基因FokⅠ酶切位点多态性,进行两组间比较;将本研究全部胃癌患者经PCR-RFLP测定后按是否带有f基因分为FF组(a组)与Ff+ff组(b组),进行组间D-二聚体测定水平比较.结果:胃癌患者的f等位基因表达频率高于对照组(57.8%vs 47.4%,P<0.05).多因素分析显示:含f等位基因(Ff+ff)的研究对象患胃癌的风险高于不含f等位基因(FF)的研究对象(OR=2.85);含f等位基因组中D-二聚体测定水平较不含f等位基因组明显升高(2.79±1.21 vs 1.09±0.65,P<0.05);随胃癌患者分化严重程度的逐步加重,单纯含F基因(FF)的患者的比例逐步下降(P<0.05).结论:维生素D受体基因FokⅠ酶切位点多态性与维吾尔族胃癌易感性相关联,f等位基因可能是维吾尔族胃癌发生的危险因素之一,而F位点可能是维吾尔族胃癌发生的保护因素.f等位基因可能是调节D-二聚体水平的因素之一,从而影响了维吾尔族胃癌患者的发生或预后.展开更多
Two d-f heterodinuclear cryptates Eu(Ⅲ)-M(Ⅱ)(M=Zn 2+, Ni 2+) were synthesized and characterized by elemental analysis, IR and ES-MS. The fluorescence properties of the cyptates in acetonitrile solution show that inc...Two d-f heterodinuclear cryptates Eu(Ⅲ)-M(Ⅱ)(M=Zn 2+, Ni 2+) were synthesized and characterized by elemental analysis, IR and ES-MS. The fluorescence properties of the cyptates in acetonitrile solution show that inclusion of Zn 2+ in the mononuclear europium(Ⅲ) cryptate increases the energy transfer between cryptand and europium(Ⅲ) ion, while the inclusion of Ni 2+ in the cavity quenches the fluorescence of Eu(Ⅲ) cryptate.展开更多
基金supported by the Natural Science Foundation of China(No.21171165,21201165 and 91122015)
文摘A series of isostructural d/f molecular compounds Zn（H2L）Ln（NO3）3·CH3OH（Ln = Dy（1）, Tb（2） and Sm（3）） were synthesized by the introduction of a designed multifunctional ligand N,N？,N？？,N？？？-tetra（2-hydroxy-3-methoxy-5-methylbenzyl）-1,4,7,10-tetraazacyclododecan（H4L = C（44）H（60）N4O8）. In the isostructural molecules, each crystallographically independent Zn2＋ and Ln3＋ centers are connected by two phenolic oxygen atoms. For the six-coordinate Zn-（2＋） ion, the coordination geometry can be viewed as a regular bicapped square pyramid. While for the ten-coordinate Ln-（3＋） ion, if each O,O？-chelated nitrate ligand is seen as a single coordination site, the coordination geometry can be viewed as a distorted pentagonal bipyramid. The fluorescent spectra show that compounds 2 and 3 exhibited characteristic sharp emissions of Tb-（3＋） and Sm-（3＋）, respectively, while compound 1 was found to be a single-component white-light-emitting complex in the solid state. Thermal stabilities of the three compounds were investigated by using thermal gravimetric analysis. In addition, the thermal decomposition of compound 1 was confirmed by temperature-dependent powder X-ray diffraction technique.
文摘目的:探讨维生素D受体基因FokⅠ酶切位点多态性与胃癌的相关性.方法:随机选取2013-03/2015-05新疆肿瘤医院就诊的维吾尔族胃癌患者147例(A组)及维吾尔族健康对照者151例(B组),采用多聚酶链反应-限制性酶切片段长度多态性方法测定维生素D受体基因FokⅠ酶切位点多态性,进行两组间比较;将本研究全部胃癌患者经PCR-RFLP测定后按是否带有f基因分为FF组(a组)与Ff+ff组(b组),进行组间D-二聚体测定水平比较.结果:胃癌患者的f等位基因表达频率高于对照组(57.8%vs 47.4%,P<0.05).多因素分析显示:含f等位基因(Ff+ff)的研究对象患胃癌的风险高于不含f等位基因(FF)的研究对象(OR=2.85);含f等位基因组中D-二聚体测定水平较不含f等位基因组明显升高(2.79±1.21 vs 1.09±0.65,P<0.05);随胃癌患者分化严重程度的逐步加重,单纯含F基因(FF)的患者的比例逐步下降(P<0.05).结论:维生素D受体基因FokⅠ酶切位点多态性与维吾尔族胃癌易感性相关联,f等位基因可能是维吾尔族胃癌发生的危险因素之一,而F位点可能是维吾尔族胃癌发生的保护因素.f等位基因可能是调节D-二聚体水平的因素之一,从而影响了维吾尔族胃癌患者的发生或预后.
文摘Two d-f heterodinuclear cryptates Eu(Ⅲ)-M(Ⅱ)(M=Zn 2+, Ni 2+) were synthesized and characterized by elemental analysis, IR and ES-MS. The fluorescence properties of the cyptates in acetonitrile solution show that inclusion of Zn 2+ in the mononuclear europium(Ⅲ) cryptate increases the energy transfer between cryptand and europium(Ⅲ) ion, while the inclusion of Ni 2+ in the cavity quenches the fluorescence of Eu(Ⅲ) cryptate.
