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Template Syntheses and Crystal Structures of Hexaaza Macrocyclic Complexes with C-Methyl Substituents

Chinese Journal of Structural Chemistry 2005年第11期24卷 1259-1263页

作者： zhang Bing KOU hui-zhong CUI Ai-Li WANG Ru-Ji Department of Chemistry Tsinghua University Beijing 100084 China

Two new macrocyclic complexes with C-methyl substituents on the framework, namely, [CuL]（ClO4）2 （L = 5,12-dimethyl-1,8-dihydroxyethyl-1,3,6,8,10,13-hexaazacyclotetradecane） 1 and [NiL]（ClO4）2 2, have been synthesized and structurally characterized through X-ray diffraction analysis. Also, crystal structure of [CuL^1]（ClO4）2 （L^1 = 1,8-dimethyl- 1,3,6,8, [ 0,13- hexaazacyclotetradecane） 3 has been determined. Crystal data for 1： C14H32C12CuN6O10, Mr = 578.90, monoclinic, P2 1/n, α = 8.3529（11）, b = 10.8105（17）, c = 13.3709（17） ,A, β = 105.189（10）°, V= 1165.2（3） A3, Z = 2, Dc = 1.650 g/cm^3, F（000） = 602, λ（MoKct） = 0.71073 A,μ = 1.229 mm ^-1, R = 0.0474 and wR = 0.0895 for 2771 observed reflections （I 〉 2σ（Ⅰ））. Crystal data for 2： C14H32C12N6NiO10, Mr = 574.07, monoclinic, P2 1/c, a = 8.3636（12）, b = 12.997（2）, c = 10.764（2） A, β = 99.31（2）°, V = 1154.7（3） A^3, Z = 2, DC = 1.651 g/cm^3, F（000） = 600, λ（MoKa） = 0.71073 A,μ = 1. 134 mm^-1, R = 0.0380 and wR = 0.0796 for 2670 observed reflections （i 〉 2σ（Ⅰ））. Crystal data for 3： C 10H26Cl2CuN6O8, Mr = 492.81, monoclinic, P2 1/n, a = 8.4860（17）, b = 8.6320（17）, c = 12.662（3） ,A,β = 103.40（3）°, V = 902.2（3）A^3, Z = 2, Dc = 1.814 g/cm^3, F（000） = 510, λ（MoKa） = 0.71073A, μ = 1.562 mm^-1, R = 0.0505 and wR = 0.1061 for 1967 observed reflections （I〉 2σ（Ⅰ））. Complexes 1 and 2 are isostructural with the metal ions situated at the inversion center/Hydrogen bonds between O atoms of pendant and perchlorate anion give rise to a two-dimensional supramolecular layer. The Cu（Ⅱ） ions of compounds 1 and 3 adopt distorted axially-elongated octahedral coordinate geometry, and the nickel（Ⅱ） ion in complex 2 is four-coordinated with a square-planar configuration.

关键词： synthesis crystal structure macrocycle C-methyl substituent copper nickel synthesis crystal structure macrocycle C-methyl substituent copper nickel

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重楼总皂苷诱导乳腺癌MCF-7细胞铁死亡抗肿瘤机制研究

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中国中药杂志 2024年第9期49卷 2385-2392页

作者：张艺博张慧中阮意丹张永强张萍芝姚爱娜李诗曼徐晓涵倪健董晓旭北京中医药大学中药学院北京102488

探讨重楼总皂苷诱导乳腺癌MCF-7细胞的铁死亡作用及机制,为重楼总皂苷临床治疗乳腺癌提供理论依据。通过噻唑蓝(methyl thiazolyl tetrazolium,MTT)实验检测不同浓度重楼总皂苷对MCF-7细胞增殖能力的影响;倒置显微镜观察MCF-7细胞形态改... 详细信息

探讨重楼总皂苷诱导乳腺癌MCF-7细胞的铁死亡作用及机制,为重楼总皂苷临床治疗乳腺癌提供理论依据。通过噻唑蓝(methyl thiazolyl tetrazolium,MTT)实验检测不同浓度重楼总皂苷对MCF-7细胞增殖能力的影响;倒置显微镜观察MCF-7细胞形态改变;平板克隆实验检测MCF-7细胞克隆形成能力;乳酸脱氢酶(lactate dehydrogenase,LDH)释放实验检测MCF-7细胞膜的完整性;划痕实验检测MCF-7细胞迁移能力;利用荧光倒置显微镜检测MCF-7细胞中活性氧(reactive oxygen species,ROS)的水平,利用试剂盒检测MCF-7细胞中Fe2+的含量;透射电镜观察MCF-7细胞线粒体超微结构;采用Western blot检测重楼总皂苷对MCF-7细胞中p53、溶质载体家族7成员11(solute carrier family 7 member 11,SLC7A11)、谷胱甘肽过氧化物酶4(glutathione peroxidase 4,GPX4)、酰基辅酶A合成酶长链家族成员4(acyl-CoA synthetase long-chain family member 4,ACSL4)、转铁蛋白受体1(transferrin receptor protein 1,TFR1)表达的影响。结果显示,1.5、3、4.5、6、7.5、9μg·mL^(-1)重楼总皂苷均能显著抑制MCF-7细胞增殖,IC50为4.12μg·mL^(-1),对细胞形态有明显的损伤,导致细胞形成空泡,逐渐皱缩并脱落;抑制MCF-7细胞的克隆形成能力,破坏细胞膜促使细胞内LDH释放,缩短MCF-7细胞的迁移距离抑制迁移能力;显著提高MCF-7细胞中ROS的含量,诱导细胞氧化损伤,导致细胞内Fe^(2+)堆积,线粒体结构也发生明显的改变,线粒体膜密度增加,嵴减少甚至消失;促进p53蛋白表达,下调SLC7A11和GPX4表达并增强ACSL4和TFR1表达。因此,重楼总皂苷可显著抑制乳腺癌MCF-7细胞的增殖和迁移能力、破坏细胞结构,其机制可能与诱导细胞铁死亡有关。

关键词：重楼总皂苷乳腺癌铁死亡机制

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A novel synthesis of 5-aryl-3-cyano-2-pyridones by using vinamidinium salts

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Chinese Chemical Letters 2009年第7期20卷 771-774页

作者： Xue hui zhang Wu zhong Xing Zhou Li Song Li Beijing Institute of Pharmacology and Toxicology Beijing 100850 China

A variety of vinamidinium salts were condensated with cyanoacetamide in refluxing methanol that contained sodium methoxide to produce 5-aryl-3-cyano-2-pyridones in good yield. Simple experimental conditions were used to prepare ten different 5-aryl-3- cyano-2-pyridones, four of which are new compounds.C 2009 Song Li. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： 5-Aryl-3-cyano-2-pyridones Vinamidinium salts Cyclization

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Isolation and Characterization of a Dichlorvos-Degrading Strain DDV-1 of Ochrobactrum sp.

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Pedosphere 2006年第1期16卷 64-71页

作者： zhang Xiao-Hua zhang Guo-Shun zhang zhong-hui XU Jian-Hong LI Shun-Peng Key Lab of Microbiological Engineering of Agricultural Environment Ministry of Agriculture Nanjing Agricultural University Nanjing 210095 （China）. Jiangsu-Polytechnic College of Agriculture and Forestry Jurong 212400 （China）

The objective of this research was to isolate a dichlorvos (2,2-dichlorovinyl dimethyl phosphate)-degrading strain of Ochrobactrum sp., and determine its effectiveness in remediation of a dichlorvos-contaminated soil. A dichlorvos-degrading bacterium (strain DDV-1) was successfully isolated and identified as an Ochrobactrumsp. based on its 16S rDNA sequence analysis. Strain DDV-1 was able to utilize dichlorvos as a sole carbon source, and the optimal pH and temperature for its cell growth and degradation were 7.0 and 30 ℃, respectively. Also, the growth and degradation of strain DDV-1 showed the same response to dissolved oxygen. In addition, the soil degradation test indicated that in soil spiked with 100 mg L-1 or 500 mg L-1 dichlorvos and inoculated with 0.5% or 1.0% (v/v) strain DDV-1, complete degradation of dichlorvos could be achieved in 24 h. The present study showed that strain DDV-1 was a fast dichlorvos-degrading bacterium in soil. However, further research will be needed to clarify the degradation pathway and the properties of the key enzymes involved in its biodegradation.

关键词： degradation dichlorvos 16S rDNA soil test strain DDV-1

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Synthesis,chemical bonding and reactivity of new medium-sized polyarsenides

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Chinese Chemical Letters 2024年第7期35卷 497-501页

作者： Xu-hui Yue Xiang-Wen zhang hui-Min He Lei Qiao zhong-Ming Sun State Key Laboratory of Element-Organic Chemistry Tianjin Key Lab for Institution Rare Earth Materials and ApplicationsSchool of Materials Science and EngineeringNankai UniversityTianjin 300350China Department of Physics Institute of Computational and Applied PhysicsTaiyuan Normal UniversityJinzhong 030619China

Gaining an understanding of the growth mechanism from single atoms to clusters and bulk materials continues to present a ***,it is important to explore the evolving trends of clusters in the structure and properties during the size *** this work,we report the synthesis and characterization of two medium-sized chain-like polyarsenic anions.[As_(21)]^(3-)represents a trimeric example of polyarsenic anion assembled through oxidative coupling of As_(7)^(3-)*** anion As_(18)^(4-)included in[As_(18)MO_(2)(CO)_(8)]^(4-)is regarded as formed by two realgar-type As_(8)subunits connected by a dinuclear AsAs *** As_(18)cluster was previously predicted by theory,and this is the first time successfully synthesized using wet chemistry ***,small-sized polyarsenides As_(2)^(2-)and As_(10)^(2-)were found in compound[K(18-crown-6)]_(3)[As_(10)]_(0.5)[As_(4){Mo(CO)_(3)}_(2)]_(0.5)·*** these,the former exhibits coordination with metal ***-crystal X-ray diffraction combined with quantum chemical calculations revealed the formation of double bonded As_(2)^(2-)stabilized by metal carbonyl *** work demonstrates a novel synthetic approach for the preparation of new polyarsenides and highlights their intriguing bonding characteristics,laying the foundation for the synthesis of such compounds and paving the way for their potential applications.

关键词： Polyarsenide Zintl anions Chain-like cluster DFT calculations AdNDP

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锆基金属有机框架MOF-808的合成及相关材料在化学防护领域中的研究进展

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离子交换与吸附 2024年第3期40卷 227-236页

作者：张劝华肖春英刘大鑫鞠博张中慧翟玲娟耿谦海军装备部中国船舶集团有限公司第七一八研究所

文章阐述了金属有机框架MOF-808的合成及其在化学防护领域的应用，包括有毒工业化学品的吸附、化学战剂的吸附和降解、吸附剂再生等方面；总结了MOF-808在化学防护领域面临的挑战以及未来的研究方向，如提升材料的稳定性、功能化修饰、... 详细信息

文章阐述了金属有机框架MOF-808的合成及其在化学防护领域的应用，包括有毒工业化学品的吸附、化学战剂的吸附和降解、吸附剂再生等方面；总结了MOF-808在化学防护领域面临的挑战以及未来的研究方向，如提升材料的稳定性、功能化修饰、规模化生产以及加工成型等。研究结果不仅有助于深入理解MOF-808的合成与应用，也为化学防护领域提供了新的材料选择和发展方向。

关键词：金属有机框架 MOF-808 化学防护吸附降解

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Super-high bed sintering for iron ores:behaviors,causes and solutions of horizontal segregation on strand

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Journal of Iron and Steel Research International 2024年第7期31卷 1590-1596页

作者： Liang-ping Xu hui-bo Liu zhong-lin Dong Qiang zhong Yu-chao Zhao Guang-hui Li School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina

Horizontal segregation has been a constraint to the development and application of super-high bed *** eliminate the horizontal segregation of super-high bed sintering,several typical sintering machines were sampled and analyzed,and theoretical calculation was made to compare the bed depth and their differences in different areas within the mixture ***,solutions were proposed and applied to a 265 m^(2) sintering *** results showed that the horizontal seg-regation of the 265 m^(2) sintering machine was dominated by particles larger than 8 mm with horizontal segregation degree of 0.48,while 360 and 550 m^(2) sintering machines were affected by 5-8 mm and 1-3 mm particles with horizontal segregation degree of 0.27 and 0.31,*** analysis indicated the different segregation distribution results from the matching of the bed depth of each area within the mixture ***,the horizontal segregation degree not larger than 0.06 was achieved by optimizing the time parameters and the division of three zones on the 265 m^(2) sintering machine.

关键词： Super-high bed sintering Horizontal segregation Feeder Particle distribution Agglomeration

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Super-high bed sintering for iron ores: inhomogeneous phenomena and its mechanism during mineralizing

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Journal of Iron and Steel Research International 2024年第8期31卷 1850-1860页

作者： hui-bo Liu Liang-ping Xu Xi-duan Yang zhong-lin Dong Qiang zhong Guang-hui Li School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina

The inhomogeneous sinter properties in super-high bed sintering have been reported in our previous *** inves-tigate the reasons for the inhomogeneous phenomena,detailed sampling and analysis of mixed material bed and sintered bed in super-high bed sintering plant were *** results indicated that the higher porosity and thinner dendrite of silico-ferrite of calcium and aluminum in the upper layer as well as dense structure and higher secondary hematite content in the lower layer led to the heterogeneities of mechanical strength and reduction properties exceeding 20%and 10%,*** the bed top downward,the basicity of mixed material decreased from 2.13 to 1.68 because the average particle size increased from 2.65 to 4.56 *** and fuels gathered in finer particles(-3 mm)of mixed material,and the-3 mm particles of mixed material generated more liquid phase than+3 mm *** heat input of super-high sintering bed was inhomogeneous due to the heat accumulation effect and unreasonable fuel *** inhomo-geneous sintering heat condition in sintering bed resulted in the different quantities and properties of liquid *** inhomogeneous quantities and properties of liquid phase that were influenced by inhomogeneous distribution of chemical composition,particle size,and heat input led to inhomogeneous mineralizing *** mineralizing condition is the key for homogeneous super-high bed sintering.

关键词： Iron ore Super-high bed sintering Mineralization Material segregation Heat accumulation

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Effect of interplanetary magnetic field B_(x)on the polar electrojets as observed by CHAMP and Swarm satellites

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Earth and Planetary Physics 2024年第2期8卷 382-390页

作者： hui Wang ChengZhi Wang YunFang zhong Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430072China

Based on 16 years of magnetic field observations from CHAMP and Swarm satellites,this study investigates the influence of the Interplanetary Magnetic Field(IMF)Bx component on the location and peak current density of the polar electrojets(PEJs).We find that the IMF Bx displays obvious local time,seasonal,and hemispherical effects on the PEJs,as follows:(1)Compared to other local times,its influence is weakest at dawn and dusk.(2)In the midnight sectors of both hemispheres,the IMF Bx tends to amplify the westward PEJ when it is0 in the Southern Hemisphere;this effect is relatively stronger in the local winter hemisphere.(3)At noontime,the IMF Bx intensifies the eastward current when it is0,it reduces the westward current;this effect is notably more prominent in the local summer hemisphere.(4)Moreover,the noontime eastward current shifts towards higher latitudes,while the midnight westward current migrates towards lower latitudes when IMF Bx is0 in the Southern Hemisphere.

关键词： polar electrojet interplanetary magnetic field Bx local time asymmetry hemispheric difference

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Three‐dimensional(3D)‐printed MXene high‐voltage aqueous micro‐supercapacitors with ultrahigh areal energy density and low‐temperature tolerance

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Carbon Energy 2024年第8期6卷 36-48页

作者： Yuanyuan Zhu Qingxiao zhang Jiaxin Ma Pratteek Das Liangzhu zhang Hanqing Liu Sen Wang hui Li zhong‐Shuai Wu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes Suzhou UniversitySuzhouChina Shanghai Key Laboratory of Rare Earth Functional Materials and Education Ministry Key Laboratory of Resource Chemistry Shanghai Normal UniversityShanghaiChina University of Chinese Academy of Sciences BeijingChina Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalianChina

The rapid advancement in the miniaturization,integration,and intelligence of electronic devices has escalated the demand for customizable microsupercapacitors(MSCs)with high energy ***,efficient microfabrication of safe and high‐energy MXene MSCs for integrating microelectronics remains a significant challenge due to the low voltage window in aqueous electrolytes(typically≤0.6 V)and limited areal mass loading of MXene ***,we tackle these challenges by developing a highconcentration(18mol kg^(−1))“water‐in‐LiBr”(WiB)gel electrolyte for MXene symmetric MSCs(M‐SMSCs),demonstrating a record high voltage window of 1.8 ***,additive‐free aqueous MXene ink with excellent rheological behavior is developed for three‐dimensional(3D)printing customizable all‐MXene microelectrodes on various *** the synergy of a highvoltage WiB gel electrolyte and 3D‐printed microelectrodes,quasi‐solid‐state MSMSCs operating stably at 1.8 V are constructed,and achieve an ultrahigh areal energy density of 1772μWhcm^(−2)and excellent low‐temperature tolerance,with a long‐term operation at−40℃.Finally,by extending the 3D printing protocol,M‐SMSCs are integrated with humidity sensors on a single planar substrate,demonstrating their reliability in miniaturized integrated microsystems.

关键词： 3D printing aqueous electrolyte high voltage micro‐supercapacitors MXene

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