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Preparation and Characterization of Dichlorocarbene Modified Multiple-walled Carbon Nanotubes

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Chemical Research in Chinese Universities 2007年第5期23卷 505-507页

作者： YU Jin-gang huang ke-long HONG Yong huang Du-shu Institute of Functional Material and Chemistry College of Chemistry and Chemical Engineering Central South University Changsha 410083 P. R. China

Multiple-walled carbon nanotubes were functionalized by cycloaddition of *** chemical modification was performed by using chloroform and sodium *** phase transfer catalysts were used to increase the efficiency of the *** chloride used as phase transfer catalyst could highly enhance the effect of *** analysis was used to evaluate the degree of *** was performed using scanning electron microscopy（SEM）and transmission electron microscopy（TEM）.Fourier transform infrared spectroscopy（FTIR）and energy-dispersive X-ray spectroscopy（EDS）were used to confirm the resulting material.

关键词： Multiple-wa/led carbon nanotubes Modification Dichlorocarbene

Hydrothermal Synthesis and Crystal Structure of a New 2D Layered Cadmium(II) Coordination Polymer:[Cd(bimc)_2]_n(bimc=1H-Benzimidazole-5-carboxylate)

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Chinese Journal of Structural Chemistry 2006年第8期25卷 975-978页

作者： DENG Qian-Jun ZENG Ming-Hua LIANG Hong huang ke-long College of Chemistry and Chemical Engineering Central South-University Changsha Hunan 410000 China Department of Chemistry and Chemical Engineering Guangxi Normal University Guilin Guangxi 541004 China Science School Foshan University Foshan Guangdong 528000 China

A new coordination polymer [Cd（bimc）2]n was obtained by the reaction of Hbimc with Cd（NO3） 2·4H2O in NaOH solution, and characterized by elemental analysis, IR and singlecrystal X-ray diffraction. The crystal belongs to orthorhombic, space group Pbcn with a = 12.533（4）, b = 15.705（5）, c = 15.200（5） A, V= 2991.8（15） A^3, Mr = 434.68, Z = 8, Dc = 1.930 g/cm^3, F（000） = 1712,μ（MoKa） = 1.492 mm^-1, the final R = 0.0410 and wR = 0.0804 for 1661 observed reflections （I 〉 2σ（I））. The Cd atom exhibits a distorted six-coordinate CdNzOa octahedral coordination geometry. The complex molecules are linked by both μ2-（η2-O, O^-）, NI and μ2-（η2-O, O^-）, N3 coordination modes of ligands to form cross-like wave （4, 4） layer structures which are further stacked through interlayer hydrogen bonds and π-π stacking interactions in an offset fashion to form a 3D supramolecular structure.

关键词： hydrothermal synthesis cadmium(Ⅱ) polymer 1H-benzimidazole-5-carbonate 2D layer

Synthesis of MnZn Ferrite Nanoscale Particles by Hydrothermal Method

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Journal of Central South University 2000年第1期12卷 37-39页

作者： GU Ying-ying SANG Shang-bin huang ke-long LIU Jian-shen College of Chemistry and Chemical Engineering Central South University of TechnologyChangsha 410083China

Hydrothermal method was used to synthesize nanoscale particles of MnZn ferrites. The crystallites were characterized by XRD, TEM and SEM. The effects of the reaction time, temperature and additives on the product were investigated. Crystallization process would be carried out above 160 ℃ for 5 h or more, higher temperature can reduce the reaction time. Additives were used to remove impurities such as Fe 2O 3, ZnMnO 3.10～15 nm pure slightly agglomerated MnZn ferrite crystallites with a narrow grain size distribution were obtained.

关键词： hydrothermal method MnZn ferrite nanoscale particles additives

Selective recognition in molecularly imprinted polymer and its chromatographic characterization for cinchonine

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Journal of Central South University of Technology 2005年第z1期12卷 102-107页

作者： ZHONG Shi-an huang ke-long LEI Qi-fu XIANG Hai-yan School of Chemistry and Chemical Engineering Central South University Changsha 410083 China School of Chemistry and Chemical Engineering Central South University Changsha 410083 China School of Chemistry and Chemical Engineering Central South University Changsha 410083 China School of Chemistry and Chemical Engineering Central South University Changsha 410083 China

A molecularly imprinting polymer (MIP) was synthesized via bulk polymerization under different conditions using anti-ague drug cinchonine (CN) as template. Infrared spectra (IR) results show that the template CNand functional monomer α-methyl acrylic acid (MAA) formed complexes before polymerization and the structure of complexes was simulated by Hyperchem. The results indicate that there are hydrogen bond or ionic bond between functional monomer and template molecule in acetonitrile solution. The MIP made in cold-initiated photo-polymerization has higher separation performance than that in the therm-initiated polymerization. The separation of the isomers CN and cinchonidine (CD) can be successfully obtained when its separate factor α reaches 1.82. Scatchard analysis suggests that the MIP recognizing CN with two classes of binding sites. The partition coefficient Kd, 1 and apparent maximum number nmax, 1 of binding sites with high affinity are 131.43 μmol/L and 58. 90 μmol/g, respectively,while Kd, 2 and nmax, 2 of binding sites with low affinity are 2.32 mmol/L and 169.08 mmol/g, respectively.

关键词： molecular imprinting cinchonine chiral separation HPLC

Effects of Oxalic Acid Addition on the Hydrothermal Synthesis of Kaolinite

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Journal of Central South University 2000年第1期12卷 34-36页

作者： LIU Su qin,huang ke long (College of Chemistry and Chemical Engineering, Central South University of Technology, Changsha 410083, China) 1. College of Chemistry and Chemical Engineering Central South University of Technology 410083 Changsha China

Kaolinite was hydrothermally synthesized from alumina gel and silicate by dissolving alumina gel in oxalic acid before it was mixed with silicate, effects of the amount of addition on the species of synthetic products were discussed. The reaction product was characterized by X ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that analcite is the only phase of the reaction solution without oxalic acid, the proportion of kaolinite in product increases with the amount of addition, and kaolinite is the main species when the molar ratio of oxalic acid to alumina reaches 0.6∶1.0. This is because oxalic acid addition is beneficial to the formation of kaolinite through changing the coordination number of aluminium from four to six, while the mixture of alumina gel, before it was dissolved in oxalic acid with silicate interfered with the crystallization of kaolinite.

关键词： kaolinite hydrothermal synthesis oxalic acid

HPLC Fingerprint with Multi-components Analysis for Quality Consistency Evaluation of Traditional Chinese Medicine Si-Mo-Tang Oral Liquid Preparation

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Chemical Research in Chinese Universities 2011年第5期27卷 756-763页

作者： YI Yue-neng CHENG Xue-mei LIU Ling-an HU Gao-yun CAI Guang-xian DEN G Yi-de huang ke-long WANG Chang-hong College of Chemistry ＆ Chemical Engineering Central South University Changsha 410083 P. R. China key Laboratory of Standardization of Chinese Medicines Ministry of Education Shanghai University of Traditional Chinese Medicine Shanghai 201203 P. R. China Hunan Hansen Pharmaceutical Co. Yiyang 413000 P. R. China College of Pharmacy Central South University Changsha 410083 R R. China Laboratory of Chinese Internal Medicine Hunan University of Chinese Medicine Changsha 410007 R R. China

Si-Mo-Tang（SMT） oral liquid preparation, a traditional Chinese medicine, was prepared from four crude herbal drugs, Fructus Aurantii Submaturus, Radix Aucklandiae, Semen Arecae and Radix Linderae Aggregatae. A combinative method using HPLC fingerprint and quantitative analysis was developed and validated for quality consistency evaluation of SMT. Individual HPLC chromatograms were evaluated against the mean chromatogram generated via a similarity evaluation computer program. Data from chromatographic fingerprints were also processed with principal component analysis（PCA） and hierarchical cluster analysis（HCA）. Additionally, six components （naringin, isonaringin, hesperidin, neohesperidin, norisoboldine and potassium sorbate） in SMT were simultaneously determined to interpret the quality consistency. For fingerprint analysis, 20 peaks were selected as the characteristic peaks to evaluate the similarities of 26 SMT collected from different manufacturers. Among the 20 characteristic peaks, 10 peaks were assigned to be naringin, hesperidin, neohesperidin, isonaringin, neoeriocitrin, tangeretin, nobiletin, norisoboldine, 5-（ethoxymethyl）furan-2-carbaldehyde and potassium sorbate, respectively. The results of similarity analysis, PCA and HCA, indicate that the samples from different manufacturers were consistent with each other in composition. The results from the quantitative data show that the contents of six compounds were significantly different in SMT oral liquid preparations from different manufacturers. The combinative method of chromatographic fingerprint with quantitative analysis developed here offered an efficient way for the quality consistency evaluation of the traditional Chinese medicine SMT.

关键词： Si-Mo-Tang oral liquid preparation Quality consistency evaluation High-performance liquid chromato-graphy(HPLC) fingerprint Quantitative determination

Absorbed Bioactive Compounds Replicate GuanxinⅡ-Induced Endothelium-Associated in/ex vivo Vasodilation

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Chinese Journal of Integrative Medicine 2024年第5期30卷 387-397页

作者： XU Min LIU Hao SU Meng-qing LI Lan YU Ai-ling CHEN ken huang Yun-ke ZHAO Qiu-long huang Wen-ya huang Xi Institute of Traditional Chinese Medicine Related Comorbid Depression Nanjing University of Chinese MedicineNanjing 210029China Department of Gynecology Women's HospitalZhejiang University School of MedicineHangzhou 310053China

Objective:To develop an interference-free and rapid method to elucidate GuanxinⅡ(GXⅡ)'s representative vasodilator absorbed bioactive compounds(ABCs)among enormous ***:The contents of ferulic acid,tanshinol,and hydroxysafflor yellow A(FTA)in GXⅡ/rat serum after the oral administration of GXⅡ(30 g/kg)were detected using ultra-performance liquid chromatography-mass *** 18 rats were randomly assigned to the control group(0.9%normal saline),GXⅡ(30 g/kg)and FTA(5,28 and 77 mg/kg)by random number table *** coronary flow velocity-time integral(VTI),i.e.,coronary flow or coronary flow-mediated dilation(CFMD),and endothelium-intact vascular tension of isolated aortic rings were *** 12 h of exposure to blank medium or 0.5 mmol/L H_(2)O_(2),endothelial cells(ECs)were treated with post-dose GXⅡof supernatant from deproteinized serum(PGSDS,300μL PGSDS per 1 m L of culture medium)or FTA(237,1539,and 1510 mg/m L)for 10 min as control,H_(2)O_(2),PGSDS and FTA *** oxide(NO),vascular endothelial growth factor(VEGF),endothelin-1(ET-1),superoxide dismutase(SOD),malondialdehyde(MDA)and phosphorylated phosphoinositide 3 kinase(p-PI3K),phosphorylated protein kinase B(p-AKT),phosphorylated endothelial nitric oxide synthase(p-e NOS)were *** was developed as a GXⅡproxy of ex vivo herbal crude ***:PGSDS effectively eliminates false responses caused by crude GXⅡ*** doses equaled the contents in GXⅡ/its post-dose serum,FTA accounted for 98.17%of GXⅡ-added CFMD and 92.99%of PGSDS-reduced vascular *** ECs,FTA/PGSDS was found to have significant antioxidant(lower MDA and higher SOD,Pkedly abolished by NG-nitro-L-arginine methyl ester(L-NA,e NOS inhibitor)and wortmannin(PI3K/AKT inhibitor

关键词： ultra-performance liquid chromatography-mass spectrometry endothelium-dependent vasodilation herbal extract GuanxinⅡ absorbed bioactive compound

Li_(1．15-x)Ni_(0．33)Co_(0．33)Mn_(0．33)O_(2+δ)溶胶-凝胶法合成、表征及合成机理

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无机材料学报 2006年第2期21卷 397-402页

作者：唐爱东黄可龙中南大学化学化工学院功能材料化学研究所长沙410083

以可溶性盐为原料采用溶胶-凝胶法合成了具有六方层状结构的Li1．15-xNi0．33Co0．33- Mn0．33O2+δ(LNCMO)固溶体．用X射线衍射(XRD)、光电子能谱(XPS)、扫描电镜(SEM)、循环伏安(CV)、充放电测试等表征了其结构、形貌、过渡金属元素... 详细信息

以可溶性盐为原料采用溶胶-凝胶法合成了具有六方层状结构的Li1．15-xNi0．33Co0．33- Mn0．33O2+δ(LNCMO)固溶体．用X射线衍射(XRD)、光电子能谱(XPS)、扫描电镜(SEM)、循环伏安(CV)、充放电测试等表征了其结构、形貌、过渡金属元素的离子价态及电化学性能,结合热重-差热分析(TG-DTA)及变温过程XRD结果分析了合成机理．950℃样品以 0．1mA／cm2的电流密度在2．5-4．5V间首次放电容量为190mAh／g,循环10次后为180mAh/g, 表明样品具有较好的电化学性能．前驱物在较低温度下分解即可形成层状LNCMO主相,高温焙烧不仅可稳定材料的层状结构,而且能显著提高其结晶性,固溶体的形成可分为以下三步: (1)前驱物氧化分解的同时生成Li-Ni-Co-Mn-O固溶体;(2)残余的Li2CO3分解产生Li2O; (3)表面的Li2O逐步扩散到固溶体内部,形成单相Li-Ni-Co-Mn-O固溶体．

关键词： Li1.15-xNi0.33Co0.33Mn0.33O2+δ 溶胶-凝胶法反应机理

Atomic Manganese Manipulating Polysulfide Speciation Pathway for Room-Temperature Na-S Batteries

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CCS Chemistry 2024年第9期6卷 2289-2304页

作者： Hong Zhang Mingli Wang Xiang-long huang Songtao Lu ke Lu Xiaohong Wu School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbinHeilongjiang 150001 Institutes of Physical Science and Information Technology Anhui UniversityHefeiAnhui 230601 Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054

Sluggish polysulfide redox kinetics,especially the high energy barrier of rate-determining short-chain polysulfide conversion and the high activation barrier of Na_(2)S decomposition during sulfur recovery,compromise the full potential of rechargeable Na-S *** we construct the hierarchical sandwich-structured carbon matrix with atomically dispersed Mn-N4 Lewis acidic sites,taking advantage of their bidirectional electrocatalytic behavior toward interface-mediated reversible sulfur *** and theoretical results reveal that the spatial confinement and catalytic effects facilitated via strong Lewis acid-base electron interactions synergistically manipulate the low kinetically direct Na_(2)S_(4) to Na_(2)S conversion,and the formation of Mn-S bond minimizes the energy barrier of Na_(2)S electrochemical activation during battery recharging,thereby rendering a reversible and tunable polysulfide speciation ***,the degradation of the Na-S cell is due to the depletion of metal anode rather than the loss of active sulfur species and/or aggregation of inactive dead *** expected,the S@Mn/NC cathode delivers outstanding rate capability and ultrahigh cycling ***,a proof-of-concept pouch cell was also demonstrated capable of delivering an energy density up to 840 Wh kgcathode−*** tunable sulfur redox electrochemistry invoked by the bidirectional monodispersed Mn catalytic hot spots facilitates the efficient polysulfide speciation for practical Na-S cells.

关键词： single-atom manganese catalysts polysulfide manipulation reaction kinetics bidirectional catalysts sodium-sulfur batteries