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Synthesis,structure and properties of an imidazolate bridged copper,zinc binuclear complex

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Chinese Journal of Chemistry 1992年第1期10卷 45-51页

作者： MAO,Zong-Wan CHEN,Dong tang,wen-xia Coordination Chemistry Institute,Nanjing University,Nanjing 210008 YU,Kai-Bei LIU,Li Analysis Center,Chengdu Branch of The Chinese Academy of Sciences,Chengdu 610015 1Coordination Chemistry Institute Nanjing University Nanjing 2100082Analysis Center Chengdu Branch of The Chinese Academy of Sciences Chengdu 610015

A new imidazolate bridged Cu^(2+),Zn^(2+)binuclear complex[(dtma) CulmZn (dtma)]ClO_4· 2.5H_2O taken as active site model for Cu,Zn-SOD has been synthesized and its crystal structure *** the bond lengths, bond angles and the distance between Cu and Zn atoms in Cu-Im- Zn core of the model complex are close to those in Cu,*** parameters of the model complex as a function of pH show that the imidazolate bridge is stable in pH range 10—12,and is broken on Zn side at pH～*** decreasing pH,the imidazole is released at pH～4 and the dtma ligand dissociates from the Cu containing fragment at pH～2.4.

关键词： Cu Synthesis,structure and properties of an imidazolate bridged copper,zinc binuclear complex Zn

Molecular structure of imidazolate bridged binuclear zinc complex and its single crystal ESR spectra doped with bridged Cu—Zn complex

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Chinese Journal of Chemistry 1993年第3期11卷 201-209页

作者： MAO,Zong-Wan CHEN,Dong HAN,Shi-Ying SUI,Yun-xia tang,wen-xia State Key Laboratory of Coordination Chemistry,Nanjing University,Nanjing 210008YU,Kai-Bei Analysis Center,Chengdu Branch of Chinese Aacdemy of Sciences,Chengdu 610015 1State Key Laboratory of Coordination Chemistry Nanjing University Nanjing 2100082Analysis Center Chengdu Branch of Chinese Academy of Sciences Chengdu 610015

The X-ray crystal structure of [(dtma)ZnImZn(dtma)]ClO_4·2.5H_2O (Hdtma=4-Diethyl- enetriamineacetic acid) was *** crystal is of orthorhombic,space group Pbcn with a- 14.104(5),b=14.897(5),c=25.384(9),and Z=*** least-square refinement of the structure leads to conventional R factor of *** magnetic properties of [(dtma)CulmZn(dtma)]CIO_4·2.5H_2O were *** the single crystal ESR spectra of Zn—Im—Zn dimer doped with Cu—Im—Zn complex,the anisotropic g and A tensors and electronic spin-density of the Cu—Zn complex are obtained and the bonding nature of Cu is discussed.

关键词： Molecular structure of imidazolate bridged binuclear zinc complex and its single crystal ESR spectra doped with bridged Cu Zn complex ESR

A CNDO/2 study on bonding mechanism of cis-dichlorodiammine platinum(Ⅱ)with DNA

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Acta Chimica Sinica(English Edition) 1983年第1期 11-18页

作者： ZHU Long-gen QU Yun tang wen-xia DAI An-bang Coordination Chemistry Research Institute,Nanjing University,Nanjing,Jiansu

Bonding mechanism of cis-Pt（NH3）2Cl2 with DNA has been studied by CNDO/2 *** computed results of the six models considered indicated that from the point of viewof overlap population Q)（AB）and two atoms energy EAB,the most favorable bonding form was thatbetween platinum and two N7 atoms,from guanines（G）to form [（NH3）2PtG2]2+.Thus,intrastrandcross-linkage mechanism which had been previously proposed by some authors was confirmed byour *** mechanism could not completely be *** certain conditions,it was possible for platinum to combine with a guanine through its N7 and O（C6）to form a chelate,but it was unstable as compared with [（NH3）2PtG3]2+.Although the intrastrand cross-linkage mechanism is favored by our calculation,the question ofhow such a mode of combination hampers replication of DNA remains to be solved.

关键词： Pt with DNA A CNDO/2 study on bonding mechanism of cis-dichlorodiammine platinum cis DNA

Thermodynamic analysis of Na−S−Fe−H_(2)O system for Bayer process

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Transactions of Nonferrous Metals Society of China 2022年第6期32卷 2046-2060页

作者： Xue-jiao ZHOU Fei TAN Yong-li CHEN Jian-guo YIN wen-tang xia Qing-yun HUANG Xu-dong GAO School of Metallurgical and Materials Engineering Chongqing University of Science and TechnologyChongqing 401331China

Thermodynamic diagrams of Na−S−Fe−H_(2)O system were constructed to analyze the behavior of sulfur and iron in the Bayer *** digestion,iron mainly exists as Fe_(3)O_(4) and Fe_(2)O_(3) in red mud,and partial iron transfers into solution as Fe(OH)_(3)^(−),HFeO_(2)^(−),Fe(OH)_(4)^(−)and Fe(OH)_(4)^(2−).The dominant species of sulfur is S^(2−),followed by SO_(4)^(2−),and then SO_(3)^(2−)and S_(2)O_(3)^(2−).The thermodynamic analysis is consistent with the iron and sulfur species distribution in the solution obtained by *** the temperature decreases,sulfur and iron can combine and *** low potential and reducing temperature are beneficial to removing them from the *** patterns show that NaFeS_(2)·2H_(2)O,FeS and FeS_(2) widely appear in red mud and precipitates of pyrite and high-sulfur bauxite digestion *** analysis can be utilized to guide the simultaneous removal of sulfur and iron in the Bayer process.

关键词： high-sulfur bauxite Na−S−Fe−H_(2)O system thermodynamic analysis simultaneous removal sulfur iron Bayer process

二(2-氨乙基)-1,3-丙二胺与镍(Ⅱ)的配合物的合成和晶体结构

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无机化学学报 1999年第4期15卷 423-428页

作者：朱海亮卜为铭唐雯霞南京大学配位化学研究所吉林大学超分子结构和谱学实验室

本文报道了二（２－氨乙基）－１，３－丙二胺［缩写为（２，３，２）］与镍的两个新配合物：［（２，３，２）Ｎｉ（ＩｍＨ）２］（ＣｌＯ４）２和［（２，３，２）２Ｎｉ２（Ｉｍ）］（ＣｌＯ４）３的合成和晶体结构（其中ＩｍＨ是咪... 详细信息

本文报道了二（２－氨乙基）－１，３－丙二胺［缩写为（２，３，２）］与镍的两个新配合物：［（２，３，２）Ｎｉ（ＩｍＨ）２］（ＣｌＯ４）２和［（２，３，２）２Ｎｉ２（Ｉｍ）］（ＣｌＯ４）３的合成和晶体结构（其中ＩｍＨ是咪唑）。配合物［（２，３，２）Ｎｉ（ＩｍＨ２）］（ＣｌＯ４）２属于正交晶系，空间群Ｐｎａ２１，晶胞参数为：ａ＝１６．７９８（３），ｂ＝１５．７２４（３），ｃ＝８．８９１（２），Ｚ＝２。Ｒ１＝０．０５６６，ｗＲ２＝０．０６５９。在配合物正离子中，Ｎｉ与（２，３，２）的四个配位Ｎ原子和两个咪唑的两个配位Ｎ原子构成ＮｉＮ６的八面体配位构型，（２，３，２）采取顺式构象。配合物［（２，３，２）２Ｎｉ２（Ｉｍ）］（ＣｌＯ４）３属于单斜晶系，空间群Ｃ２，晶胞参数为：ａ＝１２．０４４（１），ｂ＝１２．２２４（２），ｃ＝１１．８６８（１）；β＝１０８．０４°；Ｚ＝２，Ｒ１＝０．０３８４，ｗＲ２＝０．０５１６。在配合物正离子中，咪唑桥联两个等价的（２，３，２）Ｎｉ，每个镍原子都有四方锥的配位环境，（２，３，２）的四个配位Ｎ原子构成赤道平面，咪唑Ｎ原子占据轴向位置，分子内两个金属间的距离为６．

关键词：二(2-氨乙基)-1.3-丙二胺镍配合物晶体结构

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浅谈如何加强地区电网调度运行管理

装备制造技术 2014年第3期 251-252,255页

作者：汤文霞湖北孝感供电公司湖北孝感432100

电网调度工作关系到电力系统的安全、经济、持续运行。加强电网调度运行管理具有十分重要的作用。本文首先介绍电网调度的主要内容,然后提出电网调度运行管理中存在的问题,最后提出电网调度运行管理的有效对策。

关键词：电网调度运行管理优质服务经济效益

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我国未来实证会计研究发展的趋势

科技情报开发与经济 2006年第18期16卷 145-146页

作者：唐文霞徐州建筑职业技术学院江苏徐州221008

介绍了我国实证会计研究的发展历程,阐述了我国实证会计的研究领域和实证会计研究发展的推动力,指出了我国未来实证会计研究发展的侧重点。

关键词：实证会计研究资本市场会计信息质量

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对县级调度专业化管理问题的探讨

装备制造技术 2014年第2期 247-249页

作者：汤文霞湖北孝感供电公司湖北孝感432100

本文深入分析了当前县级电网调度运行管理工作中存在的漏洞,提出了针对性的改进措施,最后,对加强县调专业化管理工作提出管理对策。

关键词：县调标准化管理专业化管理

The potential mechanism and clinical application value of remote ischemic conditioning in stroke

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Neural Regeneration Research 2025年第6期20卷 1613-1627页

作者： Yajun Zhu xiaoguo Li Xingwei Lei Liuyang tang Daochen wen Bo Zeng xiaofeng Zhang Zichao Huang Zongduo Guo The First Affiliated Hospital of Chongqing Medical University ChongqingChina

Some studies have confirmed the neuroprotective effect of remote ischemic conditioning against stroke. Although numerous animal researches have shown that the neuroprotective effect of remote ischemic conditioning may be related to neuroinflammation, cellular immunity, apoptosis, and autophagy, the exact underlying molecular mechanisms are unclear. This review summarizes the current status of different types of remote ischemic conditioning methods in animal and clinical studies and analyzes their commonalities and differences in neuroprotective mechanisms and signaling pathways. Remote ischemic conditioning has emerged as a potential therapeutic approach for improving stroke-induced brain injury owing to its simplicity, non-invasiveness, safety, and patient tolerability. Different forms of remote ischemic conditioning exhibit distinct intervention patterns, timing, and application range. Mechanistically, remote ischemic conditioning can exert neuroprotective effects by activating the Notch1/phosphatidylinositol 3-kinase/Akt signaling pathway, improving cerebral perfusion, suppressing neuroinflammation, inhibiting cell apoptosis, activating autophagy, and promoting neural regeneration. While remote ischemic conditioning has shown potential in improving stroke outcomes, its full clinical translation has not yet been achieved.

关键词： Akt apoptosis autophagy cerebral perfusion cerebral vascular stenosis clinical transformation hemorrhagic stroke ischemic stroke neuroinflammation neuroprotection Notch1 PI3K remote ischemic conditioning stroke