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The Influence of the Closure of the East Paleo-Tethys Ocean on Southern South China:Evidences from Kinematics and^(40)Ar/^(39)Ar Geochronology of the Rongxian Ductile Shear Zone in Southeastern Guangxi

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Acta Geologica Sinica(English Edition) 2024年第5期98卷 1125-1140页

作者： huang wenqiang LI Saisai XIN Liangwei FENG Zuohai ZHANG Hongrui GENG Jieli LIU Kun SHI Chunyan Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources by the Province and Ministry Guilin University of TechnologyGuilinGuangxi 541004China College of Earth Sciences Guilin University of TechnologyGuilinGuangxi 541004China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China College of Tourism and Landscape Architecture Guilin University of TechnologyGuilinGuangxi 541004China

The Triassic was a crucial period in the tectonic evolution of the South China *** on tectonic deformation during this period provides information on intracontinental orogenic mechanisms in South *** this study,alongside thermochronological analyses,we examine the macroscopic and microscopic structural features of the Rongxian ductile shear zone,located south of the Darongshan granite in the southeastern part of Guangxi Province,on the southern margin of South *** shear is indicated by the characteristics of rotatedσ-type feldspar porphyroclasts,stretching lineations defined by elongated quartz grains and the orientations of quartz ***-ICP-MS U-Pb dating of zircons from two samples of granitic mylonite and one of granite yielded ages of ca.256 ***,two samples of granitic mylonite yield muscovite^(40)Ar/^(39)Ar plateau ages of 249-246 *** results indicate that the Rongxian ductile shear zone resulted from Early Triassic deformation of the late Permian Darongshan *** deformation was likely related to the closure of the eastern Paleo-Tethys Ocean and the subsequent collision of the South China and Indochina blocks,during the early stage of the Indosinian orogeny.

关键词： ductile shear zone ^(40)Ar/^(39)Ar geochronology Triassic South China Block East Paleo-Tethys Ocean

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SOLID PHASE SYNTHESIS OF ISOXAZOLINES

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Chinese Journal of Reactive Polymers 2002年第1期11卷 55-60页

作者： SUNWeimin LUOJuntao huang wenqiang State Key Laboratory of Functional Polymer Material for Adsorption and Separation Institute of Polymer ChemistryNankai UniversityTianjin 300071China

The solid-phase synthesis of isoxazolines on 2-polystyrylsulfonamidoethanol resin is reported. 2-Polystyrylsulfonamidoethanol resin 1 was reacted with acryloyl chloride to afford 2-polystyrylsulfonylamidoethyl acrylate resin 2, which was further reacted with brominated aldoximes by [3+2] cycloaddition to give isoxazoline resin 4. Resin 4 was treated with aqueous 6 mol/L HCl solution to obtain isoxazolines in good yield and purity.

关键词： Solid phase synthesis 2-Polystyrylsulfonamidoethanol Isoxazoline

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High room-temperature magnetization in Co-doped TiO_(2) nanoparticles promoted by vacuum annealing for different durations

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Journal of Semiconductors 2021年第7期42卷 71-77页

作者： wenqiang huang Rui Lin Weijie Chen Yuzhu Wang Hong Zhang College of Mechanical and Electrical Engineering Fujian Agriculture and Forestry UniversityFuzhou 350002China

To clarify the contribution of oxygen vacancies to room-temperature ferromagnetism(RTFM)in cobalt doped TiO_(2)(Co-TiO_(2)),and in order to obtain the high level of magnetization suitable for spintronic devices,in this work,Co-TiO_(2) nano-particles are prepared via the sol-gel route,followed by vacuum annealing for different durations,and the influence of vacu-um annealing duration on the structure and room-temperature magnetism of the compounds is *** results reveal that with an increase in annealing duration,the concentration of oxygen vacancies rises steadily,while the saturation magnetiza-tion(Ms)shows an initial gradual increase,followed by a sharp decline,and even *** maximum Ms is as high as 1.19 emu/g,which is promising with respect to the development of spintronic *** analysis reveals that oxygen va-cancies,modulated by annealing duration,play a critical role in tuning room-temperature *** appropriate concentra-tion of oxygen vacancies is beneficial in terms of promoting RTFM in Co-TiO_(2).However,excessive oxygen vacancies will result in a negative impact on RTFM,due to antiferromagnetic superexchange interactions originating from nearest-neighbor Co^(2+)ions.

关键词： Co-doped TiO_(2)nanoparticles room-temperature ferromagnetism different annealing duration oxygen vacancy high magnetization

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POLYSTYRYLSULFINATE RESIN AS REACTIVE INTERMEDIATE IN SOLID-PHASE ORGANIC SYNTHESIS AND SEPARATION

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Chinese Journal of Reactive Polymers 1996年第1期5卷 1-6页

作者： huang wenqiang Li Chenxi He Binglin State Key Laboratory of Functional Polymer Materials for Adsorption and Separation Institute of Polymer ChemistryNankai UniversityTianjin 300071China

This review deals with the preparation and application of Polymeric sulfinate resins as reactive intermediate in solid phase organic synthesis and separation.

关键词：反应媒介聚亚磺酸苯乙烯酯树脂固相有机合成固相有机分离

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APPLICATION OF THE SULFONATE ESTER GROUP AS A LINKER FOR SOLID PHASE ORGANIC SYNTHESIS

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Chinese Journal of Reactive Polymers 2001年第1期10卷 21-26页

作者： SUN Weimin LUO Juntao huang wenqiang ZHU Xiaoxia The State Key Laboratory of Functional Polymer Material for Adsorption and Separation Institute of Polymer ChemistryNankai UniversityTianjin 300071China Department of Chemistry University of MontrealMontrealQuebecCANADA H3C 3J7

A use of Sulfonate ester as a linker in synthesis of (-aminoalkanols was reported. Diols were tethered onto polystyryl sulfonyl chloride resin, yielding sulfonate resins (2). After cleaved by diethyl amine, diisopropy... 详细信息

关键词： Polystyryl sulfonate ester Immobilization of diol (-Aminoalkanol Solid phase organic synthesis.

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ADSORPTION SELECTIVITY FOR Cu^(2+),Ni^(2+),Co^(2+)IONS USING CROSSLINKING CHITOSAN RESINS IMPRINTED BY METAL IONS

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Chinese Journal of Reactive Polymers 1999年第1期8卷 10-11页

作者： huang wenqiang HAN Lijun LI Chenxi HE Binglin The State Key Laboratory of Functional Polymer Materials for Adsorption and Separation Institute of Polymer Chemistry Nankai University UniversityTianjin 300071 China

Metal ion-imprintedly crosslinked chitosan resin 1 and resin 2 were prepared by theuse of Cu2+ and Ni2+ as template ions and glutaraldehyde as crosslinking agent, *** investigation on the adsorption capacities and binding constants for Cu2+, Ni2+andCo2+ ions on chitosan resins, resin 1 and resin 2 exhibit the adsorption selectivity for themixture solution of 1:1 Cu2+ and Ni2+ ions. The adsorption selectivity of metal ion-imprintedresins for their template ions is much higher than that of uncrosslinked chitosan resin.

关键词： Chitosan Metal ion-imprinted chitosan resin Crosslinked chitosan resin Separation of metal ions Adsorption selectivity

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STUDIES ON THE CHEMICAL STRUCTURES OFACTIVATED CARBON FIBERS BY SOLID STATE NMR

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Chinese Journal of Reactive Polymers 1999年第1期8卷 12-19页

作者： FU Ruowen LIU Ling ZENG Hanmin huang wenqiang SUN Pingchuan Materials Science Institute Zhongshan University Guangzhou China State key laboratory of functional polymer materials for adsorption and separationNankai University Tianjin China

The solid stale C13-NMR spectra of different ACFs from various precursor fiberswere recorded in this paper. The effects of activation conditions on chemical structuresOf ACFs, as well as the changes of chemical structures during carbonization and redoxreaction were investigated by NMR technique. At same time, the solid state P31-NMRspectra of ACFs are studied The C13-NMR spectra of ACFs can be divided into sixbands that are assigned to methyl and methylene groups, hydroxyl and ether groups,acetal (or methylenedioxy carbon, graphite-like aromatic carbon structure, phenol,and quinone groups, respectively. Only phosphorous pentoxide exists on ACFs andCFs. Moreover, most of them are stuck over the crystal face but not at the edge ofgraphite-like micro-crystaL The carbonization and activation conditions affect theC13-NMR spectra of ACFs. The experimental results indicate that the redox reactionof ACFs with oxidants greatly consumes C-H group.

关键词： Activated carbon fiber Solid state C13-NMR Solid state P31-NMR Oxidation-reduction

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A NEW POLYMER-BOUND 1,2-DIOL AS A PROTECTING AGENT FOR SYMMETRICAL DIALDEHYDE

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Chinese Journal of Polymer Science 1989年第4期7卷 346-353页

作者：任启生黄文强赵芬芝何炳林 Institute of Polymer Chemistry Nankai UniversityTianjin

A novel polymer-bound 1,2-diol, 3-polystyrylsulfonyl-1,2-propanediol (6) had been prepared by the reaction of sodium polystyrylsulfinate with allyl bromide, followed by oxidation and. hydrolysis or directly with 3-chloro-1,2-propanediol in the presence of a phase transfer catalyst, n-tetrabutylammonium iodide. The capacity of resin 6 for terephthaidehyde reached 1.43 mmol/g. The aldehydic groups attached to polymer 6 reacted with hydroxylamine hydrochloride or reduced by sodium borohydride giving p-formylbenzaldoxime (yield: 89%)and p-formyl-benzalcohol (yield: 734%), respectively. The high yields of these polymer-supported reactions showed that the polymer 6 possessed the effective isolation of its reactive sites.

关键词： 3-polystyrylsulfonyl-1 2 - propanediol polymer-supported protecting group,solid - phase organic synthesis cleavage of aldol linkages

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SYNTHESIS OF NEW POLY (p-PHENYLENEVINYLENE) DERIVATIVES WITH IMPROVED SOLUBILITY

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Chinese Journal of Reactive Polymers 2000年第2期9卷 129-137页

作者： ZHANG Fuqiang YIN Shougen LIU Xiaohang huang wenqiang HE Binling The State Key Laboratory of Functional Polymer Materialsfor Adsorption and Separation Institute of Polymer ChemistryNankai UniversityTianjin 300071P.R.China

PPV-based copolymers with cyano group in the main chain have been synthesized by Wittig-type polycondensation of alkoxy-substituted dialdehydes and 4,4’-bis(cyanomethyl)-substituted diphenyl ether: [―C6H4―O―C6H4―C(CN)(CH―C6H2(OR)2―C(C(CN)―]n (POPPV). The copolymers are highly soluble in common solvents and their super highly transparent homogeneous thin films can be formed by spin coating directly without heat treatment. The chemical structures are determined by NMR and IR spectroscopys and evaluated using photoluminescence, gel-permeation chromatography (GPC) and DSC (or TGA) methods. The incorporation of ether group into the PPV backbone has an interruption of the main-chain conjugation, that results in the blue-shift of electroluminescence spectra and enhancement the solubility.

关键词： PPV Polycondesation Organic electroluminescence Solubility

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COMBINATORIAL SYNTHESIS OF MANNICH BASES IN SOLUTION/POLYMER REAGENT WORKUP

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Chinese Journal of Reactive Polymers 2000年第2期9卷 169-173页

作者： huang wenqiang CHENG Shaoling CHEN Yu SUN Weimin HE Binglin Institute of Polymer Chemistry Nankai University Tianjin 300071 China

This paper describes a combinatorial Synthesis of the Mannich Bases in Solution through the Mannich reaction using 3 ketones, 5 amines and formaldehyde in solution and hydrochloride as a catalyst and then using a macroporous quarterized ammonium resin (CO32- form) as a scavenge agent to remove the acid catalyst when the Mannich reaction is completed. It was found by GC/MS analysis that the symmetrical ketone, such as acetone, in the Mannich reaction mainly produces one Mannich base; while the asymmetrical ketone, such as 2-pentanone, gives two Mannich bases. The reactivity depends on the tereo-hinder of both ketones and amines.

关键词： Combinatorial Synthesis in Solution Mannich reaction Mannich Bases macroporous quarterized ammonium resin Scavenge Resin$

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