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Magnetic mineralogy of the Hongqiling Cu-Ni sulphide deposit: Implications for ore genesis

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Progress in Natural Science:Materials International 2007年第10期17卷 1192-1198页

作者： Xi Aihua1,2. Ge Yuhui1, Cai Yuanfeng2.and Zhang Xuefeng3(1. Faculty of Resources & Environment, Southwest Petroleum university, Chengdu 610500, china {2., nanjing university, nanjing 210093. china 3. Department of Natural Resources & Technology Information, china university of Petroleum, Beijing 102.49, china) Faculty of Resources & Environment Southwest Petroleum University Chengdu 610500 China state key {2. for endogenic metal deposit research Nanjing University Nanjing 210093 China Department of Natural Resources & Technology Infor- mation China University of Petroleum Beijing 102249 China

Pyrrhotite is one of the common ore minerals in Cu-Ni sulphide deposits, but only monoclinic pyrrhotite is ferromagnetic at room temperature. X-ray and EPA analyses reveal that most pyrrhotite forming sideronitic texture in the Hongqiling Cu-Ni sulphide deposit is monoclinic, but that in the massive ore is a mixture of monoclinic and hexagonal pyrrhotites. Differential thermal and magnetic- thermogravimetric analyses of massive ore indicate a magnetic transition and heat absorption at 32.℃, suggesting that this temperature is the thermomagnetic and phase transition point of pyrrhotite. For massive pyrrhotite ores heated at 400oC for 30 h and then quenched by cool water, the monoclinic pyrrhotite (mpo) transforms completely into the hexagonal pyrrhotite (hpo). However, all the pyrrhotites resulting from slow cooling of the sample in air are mpo. These results indicate that transformation between hpo and mpo depends upon the cooling rate. Therefore, massive ores in this deposit might have been formed via rapid cooling of ore melts. On the other hand, it is significant to study the effect of the ratio of the magnetite in total ores on the genesis of magmatic Cu-Ni suphide deposits.

关键词： pyrrhotite magnetite genesis of Cu-Ni sulphide deposit Hongqiling.

Sensitive biosensing strategy based on functional nanomaterials

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Science china Chemistry 2011年第8期54卷 1202-1217页

作者： JU HuangXian state key {2. of Analytical Chemistry for Life Science Department of Chemistry, nanjing university, nanjing 210093. china state key {2. of Analytical Chemistry for Life Science Department of Chemistry Nanjing University Nanjing China

The first decade of the 2.st century has been labeled as "the sensing decade". The functional nanomaterials offer excellent platforms for fabrication of sensitive biosensing devices, including optical and electronic biosensors. A lot of works have fo- cused on the biofunctionalization of different nanomaterials, such as metal nanoparticles, semiconductor nanoparticles and carbon nanostructures, by physical adsorption, electrostatic binding, specific recognition or covalent coupling. These biofunc- tionalized nanomaterials can be used as catalysts, electronic conductors, optical emitters, carriers or tracers to obtain the ampli- fied detection signal and the stabilized recognition probes or biosensing interface. The designed signal amplification strategies have greatly promoted the development of stable, specific, selective and sensitive biosensors in different fields. This review in- troduces some novel principles and detection strategies in the area of biosensing, based on functional nanomaterials. The gen- eral methods for biofunctionalization of nanomaterials with biomolecules and their biosensing application in immunoassay of protein, DNA detection, carbohydrate analysis and cytosensing are also described.

关键词： nanobiosensing biosensors nanomaterials biofunctionalization signal amplification bioanalysis biological recognition

Syntheses,crystal structures and properties of three novel coordination polymers with tripodal imidazole-containing ligands and benzenetetracarboxylate

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Science china Chemistry 2010年第10期53卷 2164-2169页

作者： SU Zhi, FAN Jian & SUN WeiYin state key {2. of Coordination Chemistry nanjing National {2. of Microstructures Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, nanjing university, nanjing 210093. china state key {2. of Coordination Chemistry nanjing National laboratory of Microstructures Coordination Chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing China

Three novel coordination polymers, [Ni2.tib)2.btec)]·2.2. (1), [Co2.tib)2.btec)]·2.2. (2. and [Zn4(tib)2.btec)Cl4]·2.2. (3), have been synthesized by using mixed ligands of 1,3,5-tris(1-imidazolyl)benzene (tib) and 1,2.4,5-benzenetetracarboxylic acid (H4btec) under hydrothermal conditions. Complexes 1 and 2.have the same structure and are rare three-dimensional (3D) self-penetrating (3,4,5)-connected nets, while complex 3 is an unprecedented (3,4)-connected 3D net. The different structures of 1 (2. and 3 are ascribed to the distinct coordination geometry of the metal centers. The thermal stability and photoluminescence property of the complexes were investigated.

关键词： coordination polymer self-penetration crystal structure thermal stability photoluminescence property

One-dimensional metal phosphonates based on 6-phosphononicotinic acid:A structural and magnetic study

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Science china Chemistry 2010年第10期53卷 2112-2117页

作者： WANG PengFei, DUAN Yan & ZHENG LiMin state key {2. of Coordination Chemistry Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, nanjing university, nanjing 210093. china state key {2. of Coordination Chemistry Coordination Chemistry Institute School of Chemistry and Chemical Engineering Nanjing University Nanjing China

The reactions of 6-phosphononicotinic acid (pnaH3) and metal salts result in three new compounds, namely, M(pnaH)-(H2.)3·H2. [M = Co(Ⅱ) (1), Ni(Ⅱ) (2., Zn(Ⅱ) (3)]. These compounds are isostructural and contain 2. helical chains made up of corner-sharing {MO5N} octahedra and {PO3C} tetrahedra. The chains are further connected by extensive hydrogen bonds to form a three-dimensional supramolecular structure. Magnetic studies reveal that dominant antiferromagnetic interactions are mediated in both 1 and 2. Interestingly the dehydrated compound 1 shows metamagnetic behavior at low temperature.

关键词： carboxylate-phosphonate coordination polymer magnetic property metamagnetism

LOW POTENTIAL ELECTROPOLYMERIZATION OF ANISOTROPIC CONDUCTIVE POLYTHIOPHENE FILMS AND FABRICATION OF ELECTRICAL DEVICES

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Chinese Journal of Polymer Science 1999年第2期17卷 99-111页

作者： Xiao-bo Wan Yun Lu Xiao-rong Liu Liang Zhou Shi Jin Gi Xue Department of Polymer Science and Engineering, the state key {2. of Coordination Chemistry, nanjing university, nanjing 210093. china 南京大学配位化学国家重点实验室江苏南京 210093 南京大学配位化学国家重点实验室江苏南京

The Complexation of thiophene with a Lewis acid with moderate acidity as a solvent, such as BF3-ethyl ether (BFEE) remarkedly lowered the electrochemical polymerization potential. The positively charged metal surface of electrode in the process of electrochemical deposition enhanced the coordination interaction between pi-electrons of thiophene unit and the metal, which makes thiophene rings lie parallel to the surface of electrode, resulting in a highly ordered polymeric structure. Because of the large intra-chain transfer integrals, the transport of charge is believed to be principally along the conjugated chains, which is much greater than the inter-chain hopping. The specific electrical resistance across the polythiophene film thickness is more than 10(4) times than that along the surface plane of the film. In this paper we review the recent development of polymerization technique by low potential electrochemical method performed in our lab and several electrical devices in which the compact polythiophene films, such as anionic and cationic sieves, and laminate film junction of undoped polythiophene derivatives were used.

关键词： conductive polymer polythiophene anisotropy electric device film junction

Syntheses, properties and structures of copper and nickel complexes of 6,7-dihydro-5H-1,4-dithiepin-2.3-dithiolate

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Chinese Journal of Chemistry 1994年第3期12卷 248-257页

作者： YAO, Tian-Ming YOU, Xiao-ZengCoordination Chemistry Institute, state key {2. of Coordination Chemistry, nanjing university,nanjing 2.0008, chinaYANG, Qing-ChuanChemistry Department, Beijing university, Beijing 100871, china Coordination Chemistry Institute State Key Laboratory of Coordination Chemistry Nanjing University Nanjing 210008 China Chemistry Department Beijing University Beijing 100871 China

The reaction of CuCl2.2.2. or NiCl2.6H2. with K2.C5H6S4) [potassium salt of 6,7-dihydro-5H-1,4-dithiepin-2.3-dithiolate] under nitrogen atmosphere resulted in the isolation of [Cu(C5H6S4)2.- or [Ni(C5H6S4)2.- as the tetrabutylammonium salt. Both complexes show characteristic IR and UV-Vis absorptions of transition metal dithiolenes. Cyclic voltammograms contain two waves indicating a two step electrochemical procedure [M(C5H6S4)2.0 = [M(C5H6S4)2.1-= [M(C5H6S4)2.2.. Single crystal structure study has been carried out on the nickel complex. Crystal of [Bu4N][Ni(C5H6S4)2. belongs to monoclinic space group P2./c with a=17.576(5), 6=10.883(2., c=17.773(4) A,B=91.07(2.0, Z=4, and o(calcd.)=1.348 g/cm3. Final result is R=0.059 for 2.59 reflections. The NiS4 core exhibits square planar coordination with average Ni-S bond length of 2.134(5) A. There are not anion pairs in crystal. The anions stack along a and c axes while the cations intercalate in them. The nearest S-S contact is 4.42. A. The solid powder ESR spectrum of the nickel complex shows three broadening signals at g1=2.097, g2.2.042. g3=2.02.. Magnetic susceptibility data for [Bu4N][Ni(CgH6S4)2. reveal enhanced anti-ferromagnetic interaction.

关键词： Dithiolene complex copper nickel single crystal.

A Study of Sr, Nd and O Isotopes of the K-rich Melanocratic Dykes in the Late Mesozoic Gold Field in the Jiaodong Peninsula

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Acta Geologica Sinica(English Edition) 2001年第4期75卷 432-444页

作者： SUN Jinggui, HU Shouxi, LIU Jianmin, SHEN Kun and LING Hongfei Earth Science Institute, Jilin university, Changchun 130062.state {2. laboratory of research on metallogenesis of endogenic Ore deposits,nanjing university, nanjing 210093.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101 Shandong Institute and laboratory of Geological Sciences, Jinan 2.0013 Jilin Univ Inst Earth Sci Changchun 130062 Peoples R China nanjing Univ State Key Lab Res Metallogenesis Endogen Ore Depo Nanjing 210093 Peoples R China Chinese Acad Sci Inst Geol & Geophys Beijing 100101 Peoples R China Shandong Inst Jinan 250013 Peoples R China Lab Geol Sci Jinan 250013 Peoples R China

Geologic, petrographic and petrochemical studies of the late Mesozoic K-rich melanocratic dykes, including lamprophyres, andesite porphyrites and dacite-porphyry in the gold field system in the Jiaodong Peninsula, china, have shown that these dykes are characterized by rich potassium and alkali but poor titanium. They belong to an ultra-high potassic, shoshonitic and high potassic calc-alkaline rock series. The parental magma has relatively high initial strontium ratios ((87Sr/86Sr),=0.70895-0.71140) and low (143Nd/144Nd)1 ratios (varying from 0.51135 to 0.512.1); and its δ18Osmow, whole rock values vary from +5.8%c to +10.6%c with a mean of +7.1%c. These features suggest that the source region of the magma is an enriched mantle wedge transformed from a continental lithosphere mantle which has experienced metasomatism by mantle-derived fluids with H2.-dominated fluids that were provided during the underthrusting of an ocean crust. The initial magma was generated by low-degree partial melting of the enriched mantle in its mature stage in the back-arc spreading environment. The evolution of magmas is associated with two trends, i.e., fractional crystallization and mixing with or intensive contamination by palaeo-crust materials or metamorphic rocks. The former process is evident in the gold field system of quartz-vein type, whereas the latter is dominated in the gold field system of the altered-rock type. This conclusion is very important for more detailed study of petrogenesis and mineralization through the crust-mantle interaction (exchange) in the Mesozoic in this region.

关键词： late Mesozoic K-rich melanocratic dykes Sr Nd and O isotope geochemistry gold field system in the Jiaodong Peninsula

Crystal Structure and Third-order Nonlinear Optical Property Studies on Copper(Ⅱ) Complex Containing NS Donor Ligand

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Chinese Chemical Letters 1998年第7期9卷 691-693页

作者： Fu Xin XIE Yu Peng TIAN Shi Sheng NI (Department of Chemistry, Anhui university, Hefei 2.0039)(state {2. laboratory of Coordination Chemistry, nanjing university, Naning 210093. Anhui Univ Dept Chem Hefei 230039 Peoples R China nanjing Univ State Key Lab Coordinat Chem Nanjing 210093 Peoples R China

A novel Schiff base ligand (HL) derived from S-methyldithiocabazate and pmethoxylbenzaldehyde was prepared and characterized. The Schiff base ligand acts as a single negatively charged bidentate ligand fondng D-M-D type comPlex (D=donor, M=metal). Single crystal X-ray diffraction analysis of the copper(Ⅱ) complex established that the geometry around Cu (Ⅱ) is square-planar with two equivalent M-N and M-S bonds. The two phenyl rings and the coordinated plane are almost in one plane fotheng an electronic delocalization system. Their thirdorder response was also studied.

关键词： copper (Ⅱ) complex third-order nonlinear optical property NS donor ligand

DNA Cleavage by Copper (Ⅱ) Complexes Without added Coreactants

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Chinese Chemical Letters 1999年第5期10卷 383-386页

作者： Rui REN Pin YANG Gao Yi HAN(Institute of Coordination Chemistry. state key {2. of Coordination Chemistry.nanjing university. nanjing 210093.nstitute of Molecular Science. Shanxi university. Taiyuan 030006) Institute of Coordination Chemistry State Key Lab. of Coord. Chemistry Nanjing University Nanjing 210093 China Institute of Molecular Science Shanxi University Taiyuan 030006 China

The cleavage activity of complexes between copper (Ⅱ) and four different amino acidor amino acid methyl ester on DNA was tested at physioloical pH and temperature., It was found that Cu (Ⅱ)-L-His and Cu (Ⅱ)-L-His methyl ester complexes could cleane DNA. The extent ofDNA cleavage is largely dependent on the metal ion-to-ligand ratio. The cleavage of doublestranded DNA mediated by Cu (Ⅱ)-L-His complexes occurs via a hydrolytie mechanism.

关键词： Copper (Ⅱ) complexes DNA hydrolytic cleavage