搜索到334篇“ TETRANUCLEAR“的相关文章
基于四核铜簇单元构筑的配位聚合物及光催化降解性能
2024年
以1,3-双咪唑基丙烷(1,3-BIP)、1,3,5-苯三甲酸(H_(3)BTC)和Cu(NO_(3))_(2)·3H_(2)O为原料,在溶剂热条件下合成了Cu(II)配位聚合物[Cu_(2)(μ_(3)-OH)(1,3-BIP)(BTC)]_(n)(SNUT-20),并用元素分析、热重分析、红外光谱、单晶X射线衍射等表征手段对配位聚合物进行了表征。单晶X射线衍射解析结果表明,配位聚合物SNUT-20是一个以四核铜簇作为次级结构单元,通过混合配体的进一步连接,形成一个3,8双节点的拓扑结构。此外,配位聚合物SNUT-20对罗丹明B(RhB)、亚甲基蓝(MB)和甲基橙(MO)表现出良好的光催化降解性能,对RhB、MB、MO的降解率分别达到了81.5%、89.4%和48.3%。
潘会宾吴婷婷葛婧黄沛沛拓梦琪卢久富
关键词:晶体结构热重分析光催化降解
Green Oxidation of Isochromans to Isochromanones with Molecular Oxygen Catalyzed by a Tetranuclear Vanadium Cluster
2023年
Comprehensive Summary Isochromanone is the core structure of many bioactive compounds.Direct oxidation of isochromans is one of leading methods for the construction of isochromanones,while most established processes remain suffering from the use of environmentally unfriendly metal oxidants,harsh reaction conditions,and the difficulty in catalyst recycling and product separation.Herein,we report a convenient,cost-effective,and green method for the synthesis of high-value added isochromanones via isochroman oxidations with O_(2) by a novel heterogeneous vanadium cluster catalyst(Cat.1)under mild conditions.This reaction protocol demonstrates high catalytic activity with good catalyst recyclability and reusability for a wide scope of substrates.
Huixin HuangBaokuan ChenYiru FuJing SunYanfeng BiMing-Dong Zhou
关键词:ORGANOCATALYSIS
氯桥联四核Bi(Ⅲ)配合物的合成和晶体结构及其抗癌活性
2023年
以2-吡啶甲醛和3-吡咯-氨基硫脲合成了缩氨基硫脲配体,再与氯化铋反应合成了铋配合物。通过单晶衍射获得其单晶结构,每个铋配合物分子里面包含四个配体和四个铋中心。通过MTT实验测试了铋配合物在体外对多种癌细胞株(人膀胱癌细胞株T24、人肺癌细胞株A549、人胃癌细胞株MGC-803和人乳腺癌细胞株MDA-MB-231)的抗肿瘤活性。结果显示铋配合物展现出良好的抗肿瘤活性,且活性优于顺铂。
盖爽爽蒋才云
关键词:铋配合物抗肿瘤活性缩氨基硫脲
氯桥联四核Bi(Ⅲ)配合物的合成和晶体结构及其抗癌活性
2023年
以2-吡啶甲醛和3-吡咯-氨基硫脲合成了缩氨基硫脲配体,再与氯化铋反应合成了铋配合物。通过单晶衍射获得其单晶结构,每个铋配合物分子里面包含四个配体和四个铋中心。通过MTT实验测试了铋配合物在体外对多种癌细胞株(人膀胱癌细胞株T24、人肺癌细胞株A549、人胃癌细胞株MGC-803和人乳腺癌细胞株MDA-MB-231)的抗肿瘤活性。结果显示铋配合物展现出良好的抗肿瘤活性,且活性优于顺铂。
盖爽爽蒋才云
关键词:铋配合物抗肿瘤活性缩氨基硫脲
两个具有Sn4O8簇结构的二丁基锡芳氧乙酸酯配合物的合成、晶体结构及除草活性
2023年
以二丁基氧化锡分别与苯氧乙酸(L1)、邻氯苯氧乙酸(L2)反应,合成了2个四核二丁基锡芳氧乙酸酯配合物[(o-R—C6H4—OCH_(2)COOSn(n-Bu)_(2))_(2)O]_(2)(R=H (C1)、Cl (C2))。经元素分析、IR、^(1)H和^(13)C NMR以及X射线单晶衍射表征其结构。在配合物C1、C2的独立分子中,分别存在1个以Sn2O_(2)平面四元环为中心的Sn4O_(4)梯形结构,梯的两侧分别由羧基的2个O原子与梯边的Sn—O—Sn链桥联成六元环,形成一个含Sn4O8的锡氧簇结构。配合物在220℃(C1)、250℃(C2)的空气气氛下具有较好的热稳定性。除草活性结果表明,配合物C1对决明具有较好的生长调节作用,配合物C2在50 mg·L^(-1)浓度下可高效、选择性地抑制刺苋的茎和根的生长。
谭宇星冯泳兰张复兴庾江喜蒋伍玖邝代治
关键词:晶体结构热稳定性除草活性
四核钬配合物的结构、慢磁驰豫行为及CO_(2)催化转化性质
2023年
使用多齿希夫碱配体通过溶剂热的方法合成了一例新的Ho_(4)配合物,即[Ho_(4)(NO_(3))_(2)(acac)_(4)(L)_(2)(CH_(3)OH)_(2)]·2CH_(3)CN,其中H_(4)L=(E)-2-(羟甲基)-2-(((2-羟基萘-1-基)亚甲基)氨基)丙烷-1,3-二醇,acac=乙酰丙酮。X射线衍射分析表明,配合物呈中心对称的四核结构,中心的Ho1(Ⅲ)和Ho2(Ⅲ)均为八配位的三角十二面体几何构型。配合物1具有良好的溶剂稳定性。磁性研究表明配合物1具有慢磁弛豫行为。据我们所知,配合物1是一例少有的在零直流场下具有慢磁驰豫行为的Ho_(4)配合物。值得一提的是,配合物1在催化CO_(2)与环氧化合物的环加成反应中表现出较高的催化活性。
王文敏乔娜董汕汕陈英辛晓艳杨国利方明
关键词:催化二氧化碳转化
Dramatic Impact of Auxiliary Ligands on the Dynamic Magnetic Relaxation in Tetranuclear Dy^(III)_(2)Zn^(II)_(2) Single Molecule Magnets被引量:1
2022年
Better understanding the determining factors of dynamic magnetic relaxation in polynuclear lanthanide based single-molecule magnets(SMMs)remains a challenge due to the complexity of such architectures involving interactions between the magnetic centers.To address this issue,two structurally related heterometal Dy^(III)_(2)Zn^(II)_(2) SMMs,[Zn_(2)Dy_(2)(L)_(4)(Ac)_(2)(DMF)(CH_(3)OH)]·CH_(3)OH·2H_(2)O(1)and[Zn_(2)Dy_(2)(L)_(4)(Ac)_(2)(DMF)_(2)]·4CH_(3)CN(2)(H_(2)L=(E)-2-((2-hydroxy-3-methoxybenzylidene)amino)-4-methyphenol,DMF=N,N-dimethylformamide),are introduced and investigated.Through modifying the auxiliary ligands on one Dy^(III) site while retaining that on the other Dy^(III),the intramolecular magnetic interactions and relaxation dynamics in these two heterometallic-Dy^(III)_(2)Zn^(II)_(2) SMMs can be tuned,demonstrating a dramatic change in the magnet relaxation behavior with energy barrier changing from a negligible value for 1 to 305 K for 2.Ab initio calculations reveal that changing the coordination geometries on the Dy^(III) sites can significantly affect the magnetic interactions as well as single-ion anisotropy.
Gao-Peng LiHong-Fang XieShi-Rui YangYun-Long FuYi-Quan ZhangYao-Yu Wang
关键词:DYSPROSIUM
一例四核Gd(Ⅲ)簇的结构、磁性、抑菌活性及大的磁热效应被引量:1
2022年
以多齿配体1,3-二(三(羟甲基)甲胺基)丙烷(H_(6)L)为原料,采用溶剂热法合成了一例有趣的多核Gd(Ⅲ)簇合物1,分子式为[Gd_(4)(CH_(3)COO)_(6)(H_(3)L)_(2)]·2CH_(3)OH。系统地研究了簇1的结构、磁性及抑菌活性。结构分析表明,簇1包含一个蝴蝶形的Gd_(4)核,且Gd(Ⅲ)离子中心存在2种不同的配位环境。磁性研究表明,簇1中存在反铁磁相互作用,并且表现出显著的低温磁制冷性能(T=2.0 K和ΔH=7.0 T时,-ΔS_(m)=40.6 J·kg^(-1)·K^(-1))。同时,簇1对5种常见细菌均具有抑菌活性,其中对藤黄微球菌的抑菌效果最好。
侯银玲季甲左瑶陆胜桃王欣超胡晓蒙黄晓强
关键词:磁性磁热效应抑菌活性
A Water-stable Tetranuclear Cd(Ⅱ)Bicyclic Complex Used for the Picric Acid Detection
2021年
By solvothermal reaction of Cd(II)with organic ligand N,N’-bis(3,5-dicarboxylphenyl)-thiophene-2,5-dicarboxamide(H_(4)L),a water-stable complex[Cd_(4)(H_(2)L)_(4)(H_(2)O)_(10)]·2CH_(3)OH·8H_(2)O·4DMF(1,C_(102)H_(120)Cd_(4)N_(12)O_(64)S_(4))has been successfully synthetized(DMF=N,N-dimethylformamide).1 crystallizes in the triclinic space group of P1 with a=11.815(7),b=16.209(9),c=16.742(9)Å,α=82.224(13)°,β=76.741(13)°,γ=70.313(12)°,V=2932(3)Å^(3),M_(r)=3115.93,Z=1,F(000)=1584,D_(c)=1.765 Mg/cm^(3),μ=0.901 mm^(-1),GOOF=1.101,the final R=0.0391 and wR=0.1297 for 9007 observed reflections(I>2σ(I)).1 is a tetranuclear Cd(II)bicyclic complex with strong ligand-based blue emission and can stably exist in aqueous solutions over the pH range of 2~11.1exhibits high sensitivity,selectivity and anti-interference capability for picric acid(PA)detection in aqueous solution by luminescent quenching.The value of quenching constant(K_(sv))is 3.2×10^(4)M^(-1) within the PAconcentration range of 0~40μM and the detection limit is 6.89×10^(-7) M.Lastly,we went into depth on possible mechanism of the luminescent quenching.
WANG MingWANG Xiao-MeiCHEN Ming-YuLIU ChengDING GeZHOU Xin-Hui
关键词:SENSORSCOMPLEXFLUORESCENCE
A Tetranuclear Cuprous Halide Cluster Exhibiting Efficient Blue Thermally Activated Delayed Fluorescence
2021年
A new tetranuclear cuprous halide complex,(CuBr)_(4)(PN)_(2)(PN=2-(diphenylphosphaneyl)-6-methoxypyridine),was synthesized and fully characterized.In solid state,this complex exhibits efficient blue emission with a photoluminescence quantum yield of 43.3%and a decay time of 19μs at room temperature.The theoretical calculations,combined with the temperature dependence of spectroscopic properties and emission decay behaviors,indicate that the emission in the solid state originates from the ^(1,3)(MLCT+XLCT)excited states,which are in thermal equilibrium with a small energy gap of about 0.1 eV.
WANG PeiHUANG Chun-HuaCHEN Xu-LinLU Can-Zhong
关键词:PHOTOLUMINESCENCE

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刘杰
作品数:75被引量:339H指数:11
供职机构:河北大学
研究主题:精神科 精神科护士 精神分裂症 精神分裂症患者 暴力