A new Gd coordination polymer based on 2-（pyridin-3-yl）-lH-imidazole-4,5-dicar- boxylate, formulated as {[Gd2（HPyIDC）2（H2O）5]·（bpy）·（NO3）2·3H2O}n （1, bpy = 4,4＇-bipyridine） has been synthes...A new Gd coordination polymer based on 2-（pyridin-3-yl）-lH-imidazole-4,5-dicar- boxylate, formulated as {[Gd2（HPyIDC）2（H2O）5]·（bpy）·（NO3）2·3H2O}n （1, bpy = 4,4＇-bipyridine） has been synthesized under hydrothermal conditions. The compound crystallizes in triclinic, space group Pi with a = 11.451（2）, b = 11.596（2）, c = 15.7333（3） A, β = 79.47（3）°, Z = 2, V= 1948.6（7） A^3, C30H34Gd2N10O22, Dc = 2.047 g/cm^3, Mr= 1201.17, 2（MoKa） = 0.71073 A,μ = 3.477 mml, F（000） = 1176, the final R = 0.0554 and wR = 0.1181. Polymer 1 is a 2D network built up from 4-connected HPylDC2- anion and 4-connected Gd ions. Dielectric constant of complex 1 was measured at different frequencies with temperature variation.展开更多
A new luminescent compound, {[Eu3（L）4（H2 O）8]·（NO3）·4 H2 O}n（1, H2 L = 2-（pyridine-3-yl）-imidazole-4,5-dicarboxylic acid） has been solvothermally synthesized and structurally characterized by eleme...A new luminescent compound, {[Eu3（L）4（H2 O）8]·（NO3）·4 H2 O}n（1, H2 L = 2-（pyridine-3-yl）-imidazole-4,5-dicarboxylic acid） has been solvothermally synthesized and structurally characterized by elemental analyses, IR and single-crystal X-ray diffraction. 1 crystallizes in monoclinic, space group C2/c with a = 21.0183（19）, b = 9.5227（6）, c = 28.227（3） ?, β = 106.885（5）o, V = 5406.1（8） ?3, Dc = 2.038 g/cm3, μ = 3.358 mm-1, Mr = 1658.76, F（000） = 3247, Z = 4, the final R = 0.0488, wR = 0.1195 and S = 1.075. The deprotonated L ligand employs a μ4-bridge to coordinate with three Eu（Ⅲ） ion, forming a wave-like（3,4）-connected 2 D structure. The existence of π···π interaction between the pyridine rings of L ligands leads to an infinite 3 D network. Furthermore, the thermal analysis, powder diffraction and solid-state photoluminescent properties of compound 1 have also been investigated.展开更多
Objective：To investigate the anticancer activity of the total flavonoids isolated from a herbal formula,Xianhe Yanling Recipe（仙鹤延龄方）,a recipe commonly used in cancer patients in China.Methods： The in vitro an...Objective：To investigate the anticancer activity of the total flavonoids isolated from a herbal formula,Xianhe Yanling Recipe（仙鹤延龄方）,a recipe commonly used in cancer patients in China.Methods： The in vitro anticancer activity of the total flavonoids was determined using the 3-（4,5-dimethylthiazole-2-yl）-2,5- diphenyltetrazolium bromide（MTT） assay on three cancer cell lines：MCF-7（a human breast adenocarcinoma cell line）,HepG-2（a human hepatocellular carcinoma cell line） and ES-2（a human ovarian cancer cell line）. The in vivo anticancer effect of the total flavonoids was assessed in a mouse tumor model bearing H22-induced hepatocellular carcinoma,and cisplatin was used as a positive control.Results：The total flavonoids exerted a powerful inhibitory effect on the three cell lines,with 50%inhibiting concentrations（IC_（50）） of 24.948,31.569 and 6.923μg/mL,respectively.In vivo studies showed that the total flavonoids had dose-dependent inhibitory effects on hepatocellular carcinoma in mice.Conclusion：The total flavonoids from Xianhe Yanling Recipe have potential anticancer activity,and further researches and development are warranted.展开更多
基金Supported by the National Natural Science Foundation of China(No.21201087)Jiangsu Province NSF BK20131244+1 种基金the Foundation of Jiangsu Educational Committee(11KJB150004)Qing Lan Project of Jiangsu Province
文摘A new Gd coordination polymer based on 2-（pyridin-3-yl）-lH-imidazole-4,5-dicar- boxylate, formulated as {[Gd2（HPyIDC）2（H2O）5]·（bpy）·（NO3）2·3H2O}n （1, bpy = 4,4＇-bipyridine） has been synthesized under hydrothermal conditions. The compound crystallizes in triclinic, space group Pi with a = 11.451（2）, b = 11.596（2）, c = 15.7333（3） A, β = 79.47（3）°, Z = 2, V= 1948.6（7） A^3, C30H34Gd2N10O22, Dc = 2.047 g/cm^3, Mr= 1201.17, 2（MoKa） = 0.71073 A,μ = 3.477 mml, F（000） = 1176, the final R = 0.0554 and wR = 0.1181. Polymer 1 is a 2D network built up from 4-connected HPylDC2- anion and 4-connected Gd ions. Dielectric constant of complex 1 was measured at different frequencies with temperature variation.
基金financially supported by the Youth Teachers’Training Foundation of Minnan Science and Technology Institute,Young and Middle-age Academic Leader Plan of Quanzhou University,National University Student Innovation and Entrepreneurship Project(201812992001)the undergraduate education teaching reform in Fujian province(2017)
文摘A new luminescent compound, {[Eu3（L）4（H2 O）8]·（NO3）·4 H2 O}n（1, H2 L = 2-（pyridine-3-yl）-imidazole-4,5-dicarboxylic acid） has been solvothermally synthesized and structurally characterized by elemental analyses, IR and single-crystal X-ray diffraction. 1 crystallizes in monoclinic, space group C2/c with a = 21.0183（19）, b = 9.5227（6）, c = 28.227（3） ?, β = 106.885（5）o, V = 5406.1（8） ?3, Dc = 2.038 g/cm3, μ = 3.358 mm-1, Mr = 1658.76, F（000） = 3247, Z = 4, the final R = 0.0488, wR = 0.1195 and S = 1.075. The deprotonated L ligand employs a μ4-bridge to coordinate with three Eu（Ⅲ） ion, forming a wave-like（3,4）-connected 2 D structure. The existence of π···π interaction between the pyridine rings of L ligands leads to an infinite 3 D network. Furthermore, the thermal analysis, powder diffraction and solid-state photoluminescent properties of compound 1 have also been investigated.
文摘Objective：To investigate the anticancer activity of the total flavonoids isolated from a herbal formula,Xianhe Yanling Recipe（仙鹤延龄方）,a recipe commonly used in cancer patients in China.Methods： The in vitro anticancer activity of the total flavonoids was determined using the 3-（4,5-dimethylthiazole-2-yl）-2,5- diphenyltetrazolium bromide（MTT） assay on three cancer cell lines：MCF-7（a human breast adenocarcinoma cell line）,HepG-2（a human hepatocellular carcinoma cell line） and ES-2（a human ovarian cancer cell line）. The in vivo anticancer effect of the total flavonoids was assessed in a mouse tumor model bearing H22-induced hepatocellular carcinoma,and cisplatin was used as a positive control.Results：The total flavonoids exerted a powerful inhibitory effect on the three cell lines,with 50%inhibiting concentrations（IC_（50）） of 24.948,31.569 and 6.923μg/mL,respectively.In vivo studies showed that the total flavonoids had dose-dependent inhibitory effects on hepatocellular carcinoma in mice.Conclusion：The total flavonoids from Xianhe Yanling Recipe have potential anticancer activity,and further researches and development are warranted.
