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Toward Dynamic,Magnetic MetaI-Carboxylate Coordination polymers

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Toward Dynamic,Magnetic MetaI-Carboxylate Coordination Polym...

中国化学会第五届全国结构化学学术会议

作者： Xiao-Ming Chen Xiao-Ning Cheng MOE Laboratory of bioinorganic and Synthetic chemistry,school of chemistry & chemical engineering sun yat-sen university,guangzhou 5102.5.

＜正＞Metal-organic frameworks（MOFs）,including metal-carboxylate coordination polymers,are of intensive current interest and importance for their potentially useful *** fact, organic carboxylates exhibit rich coordi...

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Heterogeneous engineering of MnSe@NC@reS_(2) core-shell nanowires for advanced sodium-/potassium-ion batteries

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rare Metals 2024年第8期43卷 3713-3723页

作者： Sheng-Jun Lu Jin-Yi Lin Cai-Hong Wang Yu-Fei Zhang Yi Zhang Hao-sen Fan College of Materials Science and Metallurgy engineering Guizhou university Guiyang 550025China school of Energy Science and engineering Nanjing Tech UniversityNanjing 211816China school of chemistry and chemical engineering Guangzhou UniversityGuangzhou 510006China

Sodium-ion batteries(SIbs) and potassium-ion batteries(pIbs) have been attracting great attentions and widely been exploited due to the abundant sodium/potassium ***,the preparation of high-powered anode materials for SIbs/pIbs plays a decisive role for the commercial applications of SIbs/pIbs in the *** selenides are a class of potential anode materials for SIbs/pIbs because of their small band gap and high electrical *** this work,MnSe and reS_(2) core-shell nanowires connecting by polydopamine derived carbon nanotube(MnSe@NC@reS_(2)) have been successfully synthesized from growing reS_(2) nanosheets array on the surface of MnSe@NC nano wires,which present excellent Na^(+)/K^(+) storage *** applied as SIbs anode,the specific capacity of 300 mAh·g^(-1) was maintwined after 400 cycles at the current density of 1.0 A·g^(-1).besides,it could also keep 120 mAh·g^(-1) specific capacity after 900 cycles at 1.0 A·g^(-1) for the anode of *** heterogeneous engineering and one-dimensional-two-dimensional(1D-2D) hybrid strategies could provide an ideal strategy for the synthesis of new hetero-structured anode materials with outstanding battery performance for SIbs and pIbs.

关键词： Heterogeneous engineering Core-shell nanowires MnSe@NC@reS_(2)nanowires Na^(+)batteries K^(+)batteries

微波消解-原子荧光光谱法测定番茄不同部位中微量汞

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分析测试学报 2005年第1期24卷 89-92页

作者：朱芳刘翅杨中艺中山大学化学与化学工程学院广东广州510275 中山大学测试中心广东广州510275 中山大学生命科学学院广东广州510275

在汞污染的土壤上种植不同品种番茄 ,采用微波溶样技术和原子荧光光谱法 ,测定番茄不同部位的汞含量 ,初步研究了汞在番茄植株各个部位的分布情况 ,同时确定了微波消解该类样品的最佳条件 ,优化了原子荧光光谱仪的工作参数。该方法具有... 详细信息

在汞污染的土壤上种植不同品种番茄 ,采用微波溶样技术和原子荧光光谱法 ,测定番茄不同部位的汞含量 ,初步研究了汞在番茄植株各个部位的分布情况 ,同时确定了微波消解该类样品的最佳条件 ,优化了原子荧光光谱仪的工作参数。该方法具有快速、简便、准确等特点 ,汞含量在0.01～20μg/L范围内线性良好 ,相关系数r=0.9998。研究结果还表明 ,汞含量在番茄各部位中的分布规律是根叶>茎果实 ,只有1/10的供试番茄品种在汞胁迫下果实中汞含量超标。

关键词：微波消解原子荧光光谱法番茄汞

CHArACTErIZATION OF rEGENErATED CELLULOSE MEMbrANES HYDrOLYZED FrOM CELLULOSE ACETATE

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Chinese Journal of polymer Science 2002年第4期20卷 369-375页

作者： Yun Chen Xiao-peng Xiong Guang Yang Li-na Zhang sen-lin Lei Hui Liang Electron Microscope Lab of Medical school, Wuhan university Wuhan 430072, china College of chemistry and Molecular Sciences, Wuhan university, Wuhan 430072, china Wuhan Univ Coll Chem & Mol Sci Wuhan 430072 Peoples R China Wuhan Univ Sch Med Electron Microscope Lab Wuhan 430072 Peoples R China

A series of cellulose acetate membranes were prepared by using formamide as additive, and then were hydrolyzed in 4 wt% aqueous NaOH solution for 8 h to obtain regenerated cellulose membranes. The dependence of degree of substitution, structure, porous properties, solubility and thermal stability on hydrolysis time was studied by chemical titration, Fourier transform infrared spectroscopy, scanning electron microscopy, wide-angle X-ray diffraction, and differential scanning calorimetry, respectively. The results indicated that the pore size of the regenerated cellulose membranes was slightly smaller than that of cellulose acetate membrane, while solvent-resistance, crystallinity and thermostability were significantly improved. This work provides a simple way to prepare the porous cellulose membranes, which not only kept the good pore characteristics of cellulose acetate membranes, but also possessed solvent-resistance, high crystallinity and thermostability. Therefore, the application range of cellulose acetate membranes can be expanded.

关键词： hydrolysis cellulose acetate thermal stability regenerated cellulose membrane pore size solvent-resistance SEM

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麦角甾醇及其衍生物的氢化学位移溶剂效应

分析测试学报 2004年第3期23卷 26-30页

作者：李厚金林永成中山大学化学与化学工程学院广东广州510275

首次研究了麦角甾醇及其衍生物的氢化学位移溶剂效应。发现麦角甾醇和3β,5α,6β_三羟基麦角甾醇分别以CDCl3、CD3COCD3、DMSO_d6为溶剂 ,测 1HNMr谱 ,甾醇中羟基附近的氢有明显的溶剂效应现象。麦角甾醇和3β,5α,6β_三羟基麦角甾醇... 详细信息

首次研究了麦角甾醇及其衍生物的氢化学位移溶剂效应。发现麦角甾醇和3β,5α,6β_三羟基麦角甾醇分别以CDCl3、CD3COCD3、DMSO_d6为溶剂 ,测 1HNMr谱 ,甾醇中羟基附近的氢有明显的溶剂效应现象。麦角甾醇和3β,5α,6β_三羟基麦角甾醇中19位的甲基虽然和羟基的距离相对比较远 ,但也存在明显的位移改变。当把麦角甾醇羟基乙酰化之后 ,明显的溶剂效应现象消失 ,说明溶剂效应现象跟甾醇羟基有关。不同的溶剂有不同的介电常数 ,和甾醇羟基形成氢键的能力也不同 ,羟基氧的电子云密度不同 ,它能通过空间的相互作用 ,对19位甲基及羟基附近的氢产生不同的屏蔽作用 ,导致了不同的化学位移改变。

关键词：麦角甾醇 3β,5α,6β-三羟基麦角甾醇 ^1H NMr 化学位移溶剂效应

Calix[4]arene Derivatives Containing Amide Functionality Coordinated with Transition Metal Ions

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Calix[4]arene Derivatives Containing Amide Functionality Coo...

中国化学会第五届全国结构化学学术会议

作者： Ying-Hua Zhou~a Li Wang~b Zong-Wan Mao~(*a) Liang-Nian Ji~a a school of chemistry and chemical engineering,sun yat-sen university,guangzhou 5102.5 b Department of chemistry,Tongji university,Shanghai 200092

＜正＞Over these years calixarenes have been focused on molecular receptors in supramolecular chemistry due to the high preorganization and complementarity with the *** with functional group at the up or lower rims ma... 详细信息

关键词： tert-butylcalixarene complexes structures zinc(Ⅱ) copper(Ⅱ) cadmium(Ⅱ)

Improving the Solubility via pharmaceutical Cocrystals

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Improving the Solubility via Pharmaceutical Cocrystals

2011年全国药物化学学术会议——药物的源头创新

作者： Jia-Mei Chen,Sai-Li Zheng,Qian Tao,Yan Yan,and Tong-bu Lu school of pharmaceutical Sciences/school of chemistry and chemical engineering,sun yat-sen university,guangzhou,5102.5,china

＜正＞Less than 1%of active compounds eventually make it into the marketplace,and the poor biopharmaceutical property caused by the low solubility is the main ***,cocrystals have become a new and powerful technology in pharmaceutical science,as the solubility and bioavailability for a given active pharmaceutical ingredient（ApI） can be improved through cocrystals.A

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Assembly of an M3L2 Supramolecular Host

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Assembly of an M3L2 Supramolecular Host

中国化学会第五届全国结构化学学术会议

作者： Qing-Yuan Yang Xue-Li Zhang Cheng-Yong Su school of chemistry and chemical engineering,sun Yet-sen university,guangzhou 5102.5,Guangdong,china,

＜正＞Supramolecular chemistry utilizes self-assembly to create large discrete structures with complicated *** cavity-containing assemblies can act as isolated hosts to modulate the properties of a small molecule by v...

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3D-QSAr and Docking Analyses of c-Src Inhibitors

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3D-QSAR and Docking Analyses of c-Src Inhibitors

第十届全国计算(机)化学学术会议

作者： Wen Juan Wua,b,rong Zhanga,Yong Shenb,Kang-Cheng Zhengb~* a Department of physical chemistry,Guangdong pharmaceutical university,guangzhou,510006, b.school of chemistry and chemical engineering,sun yat-sen university,guangzhou,5102.5,

Three-dimensional quantitative structure-activity relationship(3D-QSAr) and docking studies were performed on a series of cyanoquinoline derivatives inhibiting c-Src *** statistically significant model was established of 50 molecules,which were validated by a test set of 20 *** CoMFA model yielded a q=0.609,non cross-validated r of 0.891,F value of 196.267,and standard error of estimate=0.118 while the CoMSIA model yielded the best predictive model with a q=0.653,non cross-validated r of 0.843,F value of 122.735,and standard error of estimate=*** indicate that the 3D topology structure of active site of c-Src kinase from the docking analysis is in good agreement with 3D-QSAr model for this series of *** on the contour maps obtained from 3D-QSAr and docking analyses,some key structural factors of the compounds were revealed as follows:(1)The substituent r should be higher electronegativity and small steric volume groups.(2)Higher electronegativity on the first atom of substituent r is favorable to the activity.(3) Selecting substituent r’ to be a pyridyl group may increase the activity of compound,***,the interation information between target and ligand was presented in *** results will be useful for design of novel and potent c-Src kinase inhibitors.

关键词： cyanoquinoline derivatives c-Src docking 3D-QSAr