(1,3-Dimethylimidazolidine-2-selone-κSe)bis(1,10-phenanthroline-κ2N,N′)copper(II) bis(perchlorate) and bis(2,2′-bipyridyl-κ2N,N′)(imidazolidine-2-thione-κS)copper(II) bis(perchlorate)
摘要:
In the rst title salt, [ Cu( C12H8N2) (2)( C5H10N2Se)]( ClO4) (2), the Cu-II centre occupies a distorted trigonal - bipyramidal environment de ned by four N donors from two 1,10- phenanthroline ( phen) ligands and by the Se donor of a 1,3- dimethylimidazolidine-2-selone ligand, with the equatorial plane defined by the Se and by two N donors from different phen ligands and the axial sites occupied by the two remaining N donors, one from each phen ligand. The Cu - N distances span the range 1.980 ( 10) - 2.114 ( 11) angstrom and the Cu - Se distance is 2.491 ( 3) angstrom. Intermolecular pi-pi contacts between imidazolidine rings and the central rings of phen ligands generate chains of cations. In the second salt, [ Cu( C10H8N2)(2-)( C3H6N2S)]( ClO4) (2), the Cu-II centre occupies a similar distorted trigonal-bipyramidal environment comprising four N donors from two 2,20- bipyridyl ( bipy) ligands and an S donor from an imidazolidine- 2- thione ligand. The equatorial plane is de ned by the S donor and two N donors from different bipy ligands. The Cu - N distances span the range 1.984 ( 6)-2.069 ( 7) angstrom and the Cu - S distance is 2.366 ( 3) angstrom. Intermolecular pi-pi contacts between imidazolidine and pyridyl rings form chains of cations. A major difference between the two structures is due to the presence in the second complex of two N - H center dot center dot center dot O hydrogen bonds linking the imidazolidine N H hydrogen- bond donors to perchlorate O- atom acceptors.
Inhibition of Lactoperoxidase-Catalyzed Oxidation by Imidazole-Based Thiones and Selones: A Mechanistic Study
作者:Gouriprasanna Roy、P. N. Jayaram、Govindasamy Mugesh
DOI:10.1002/asia.201300274
日期:2013.8
N‐disubstituted thiones and selones that contain an imidazole pharmacophore. The N,N‐disubstituted thiones do not show any inhibitory activity towards LPO‐catalyzed oxidation reactions, but their corresponding N,N‐disubstituted selones exhibit inhibitory activity towards LPO‐catalyzed oxidation reactions. Substituents on the N atom of the imidazole ring appear to have a significant effect on the inhibition of LPO‐catalyzed
在本文中,我们描述了一系列包含咪唑药效基团的N,N-二取代的硫酮和色氨酸的合成和仿生活性。N,N-二取代的硫酮对LPO催化的氧化反应没有任何抑制活性,但它们相应的N,N-二取代的紫杉醇对LPO的氧化反应具有抑制作用。咪唑环N原子上的取代基似乎对LPO催化的氧化和碘化反应的抑制具有显著作用。Selones 16,17,和19,其中包含甲基,乙基,和苄基的取代基,表现出对与IC LPO催化氧化反应类似的抑制活性50个24.4,22.5,和22.5μ值中号,分别。但是,它们的活性几乎比常用的抗甲状腺药甲巯咪唑(MMI)低三倍。与此相反,selone 21,其中包含A N CH 2 CH 2 OH取代基,显示出高抑制活性,具有的IC 50值的7.2μ中号,这是类似于MMI的。这些selones对LPO催化的氧化/碘化反应的抑制活性是由于它们能够通过催化还原H 2 O 2来降低共底物(H 2 O
Synthesis and reactivity of subvalent compounds. Part 13: Reaction of triethyl orthoformate with amines and selenium—a convenient one-step three-component synthesis for selenoureas
作者:Yuehui Zhou、Michael K. Denk
DOI:10.1016/s0040-4039(02)02818-6
日期:2003.2
Selenoureas are obtained by a novel three-component condensation reaction from metallic selenium, triethyl orthoformate and a primary or secondary amine. The reaction is carried out as solvent-free one pot-procedure at 180–190°C under inert gas with a reaction time of 8 h. The reaction was tested for piperidine, isopropylamine, N,N′-dimethylpropylenediamine (Me-NH-CH2-CH2-CH2-NH-Me) and N,N′-disubstituted
Precursor reaction kinetics control compositional grading and size of CdSe<sub>1−x</sub>S<sub>x</sub> nanocrystal heterostructures
作者:Leslie S. Hamachi、Haoran Yang、Ilan Jen-La Plante、Natalie Saenz、Kevin Qian、Michael P. Campos、Gregory T. Cleveland、Iva Rreza、Aisha Oza、Willem Walravens、Emory M. Chan、Zeger Hens、Andrew C. Crowther、Jonathan S. Owen
DOI:10.1039/c9sc00989b
日期:——
We report a method to control the composition and microstructure of CdSe1-x S x nanocrystals by the simultaneous injection of sulfide and selenide precursors into a solution of cadmium oleate and oleic acid at 240 °C. Pairs of substituted thio- and selenoureas were selected from a library of compounds with conversion reaction reactivity exponents (k E) spanning 1.3 × 10-5 s-1 to 2.0 × 10-1 s-1. Depending
我们报告了一种通过在 240 °C 下将硫化物和硒化物前体同时注入油酸镉和油酸溶液中来控制 CdSe1-x S x 纳米晶体的组成和微观结构的方法。一对取代的硫代和硒脲选自化合物库,其转化反应反应指数 (k E) 跨越 1.3 × 10-5 s-1 至 2.0 × 10-1 s-1。根据相对反应性 (k Se/k S),获得核/壳和合金结构。使用注射泵方法生长厚 CdS 外壳可在单个反应容器中提供克数量的明亮光致发光量子点 (PLQY = 67 至 90%)。动力学模拟预测,小于 10 的相对前体反应率会导致合金成分,而较大的反应性差异会导致突然的界面。CdSe1-x S x 合金 (k Se/k S = 2.4) 显示出两种纵向光学声子模式,具有合金微观结构的成分相关频率特征。当一种前体比另一种更具反应性时,其转化反应性和摩尔分数控制核数、完全转化时的最终纳米晶体尺寸和元素组成。讨论了控制反应性在调整合金微观结构中的作用。
Synthesis, X-ray structures and anticancer activity of gold(I)-carbene complexes with selenones as co-ligands and their molecular docking studies with thioredoxin reductase
作者:Adam A.A. Seliman、Muhammad Altaf、Abdulmujeeb T. Onawole、Saeed Ahmad、Mohammed Yagoub Ahmed、Abdulaziz A. Al-Saadi、Saleh Altuwaijri、Gaurav Bhatia、Jatinder Singh、Anvarhusein A. Isab
DOI:10.1016/j.jorganchem.2017.07.034
日期:2017.10
[Au(IPr)(Selenone)]+ and PF6− ions. In the complex ions, gold(I) atom adopts a linear geometry. In vitro cytotoxicity was appraised for all complexes against HCT15, A549 and MCF7 cancer cell lines. The IC50 values showed that the complexes exhibited poor activity as compared to cisplatin. However, the complex 1 showed a promising anticancer activity (IC50 = 33 ± 1 μM) similar to that exhibited by cisplatin