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Chinese Chemical Letters 2016年第4期27卷 523-526页

作者： Zhuo-Ting Huang Cong-Cheng Fan Guo-Biao Xue Jia-Ke Wu Shuang Liu Huan-Bin Li Hong-Zheng Chen Han-Ying Li MOE key laboratory of Macromolecular synthesis and Functionalization State Key Laboratory of Silicon Materials Department of Polymer Science and Engineering Zhejiang University

Field-effect transistors（FETs） of three diketopyrrolopyrroles（DPP）-based small molecules, 3,6-bis（5-phenylthiophene-2-yl）-2,5-bis（2-ethylhexyl）pyrrolopyrrole-1,4-dione（PDPPP）, 3,6-bis（5-（4-fluorophenyl）thiophene-2-yl）-2,5-bis（2-ethylhexyl）pyrrolo pyrrole-1,4-dione（FPDPPPF） and 3,6-bis（5-（4-n-butylphenyl）thiophene-2-yl）-2,5-bis（2-ethylhexyl）pyrrolo pyrrole-1,4-dione（Bu PDPPPBu）, have been studied in this work. Well aligned crystals of the three molecules were grown from para-xylene by droplet-pinned crystallization method. FETs based on these aligned crystals exhibit a hole mobility up to0.19 cm^2 V 1s 1and electron mobility up to 0.008 cm^2 V 1s 1. The achieved hole mobility is of the same order of magnitude as reported highest hole mobility for DPP-based small molecules, but it is much lower than that of the high-performance DPP-based polymers. The relative low mobility is mainly attributed to the rough crystal surfaces with steps and, thus, non-smooth charge transport channels at the interfaces between the crystals and the dielectrics. This work has implications for understanding the low charge mobility of DPP-based small molecules.

关键词： Diketopyrrolopyrrole Crystals Solution processing Organic field-effect transistors Morphology

PREPARATION OF CHITOSAN/HYDROXYAPATITE GUIDED MEMBRANE USED FOR PERIODONTAL TISSUE REGENERATION

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Chinese Journal of Polymer Science 2010年第4期28卷 555-561页

作者：胡巧玲 Institute of Biomedical Macromolecules Department of Polymer Science and EngineeringKey Laboratory of Macromolecule Synthesis and FunctionalizationMinistry of EducationZhejiang University

In an effort to develop biomaterials to meet guided tissue regeneration （GTR） standards for periodontal tissue recovery, a homogeneous and transparent chitosan （CS）/hydroxyapatite （HA） membrane with potential applications as GTR barrier in periodontal therapy has been prepared via in situ compositing. The membrane has been designed to have a smoothrough asymmetric structure that meets the demand for GTR. Component and morphology of the membrane are characterized by XRD and SEM. It can be indicated that HA was in situ synthesized uniformly in the CS membrane. Mechanical experiments of the membranes with various HA contents show that their tensile strengths are adequate for periodontal therapy. Biological properties of the membrane have been performed by cell toxicity assays, hemolysis tests and animal experiments. Results indicate that the membrane has good biocompatibility and inductive effect for cell growth. Therefore this membrane can be potentially applied as GTR barrier membrane for periodontal tissue regeneration.

关键词： Chitosan membrane Hydroxyapatite In situ compositing Periodontal tissue regeneration

Highly insulating phase of Bi_(2)O_(2)Se thin films with high electronic performance

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Nano Research 2023年第2期16卷 3224-3230页

作者： Tao Wang Zhuokai Xu Ziye Zhu Mengqi Wu Zhefeng Lou Jialu Wang Wanghua Hu Xiaohui Yang Tulai Sun Xiaorui Zheng Wenbin Li Xiao Lin Department of Physics Fudan UniversityShanghai 200433China key laboratory for Quantum Materials of zhejiang province Department of PhysicsSchool of ScienceWestlake UniversityHangzhou 310024China key laboratory of 3D Micro/nano Fabrication and Characterization of zhejiang province School of EngineeringWestlake UniversityHangzhou 310024China Center for Electron Microscopy State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China

Bi_(2)O_(2)Se is highly competitive as a candidate of next-generation high-performance *** dubbed as semiconductor,Bi_(2)O_(2)Se films exhibited high conductance,i.e.,metallic behavior,due to spontaneously ionized ***/insulating films are of practical importance in broad applications based on low-power,high-performance electronics,the existence of which lacks firm ***,we synthesized highly insulating films in a controlled way,which exhibit semiconducting behavior with channel resistance up to 1 TΩ.The electron chemical potential lies within the band gap,in some cases,even below the charge neutrality level,signifying the trace of hole-type *** performance of insulating devices remains high,comparable to high-quality devices ***,the threshold voltage(Vth)is positive,contrary to common negative values *** indicate that our synthesis conditions suppress electron donors(Se vacancies(VSe))and promote the formation of compensating acceptors(Bi vacancies(VBi)),leading to insulating *** work offers insights into electron dynamics of Bi_(2)O_(2)Se,moves one step further towards p-type transistors and provides a valuable playground for engineering ferroelectricity in high-performance semiconductors.

关键词： Bi_(2)O_(2)Se field effect transistor high performance layered semiconductor highly insulating phase in-gap state

A Review on Graphene Oxide Two-dimensional Macromolecules: from Single Molecules to Macro-assembly

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Chinese Journal of Polymer Science 2021年第3期39卷 267-308,I0004页

作者： Wen-Zhang Fang Li Peng Ying-Jun Liu Fang Wang Zhen Xu Chao Gao Ministry of Education key laboratory of Macromolecular synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Graphene oxide(GO), which consists of two-dimensional(2 D) sp^(2) carbon hexagonal networks and oxygen-contained functional groups, has laid the foundation of mass production and applications of graphene materials. Made by chemical oxidation of graphite, GO is highly dispersible or even solubilized in water and polar organic solvents, which resolves the hard problem of graphene processing and opens a door to wet-processing of graphene. Despite its defects, GO is easy to functionalize, dope, punch holes, cut into pieces, conduct chemical reduction, form lyotropic liquid crystal, and assemble into macroscopic materials with tunable structures and properties as a living building block. GO sheet has been viewed as a single molecule, a particle, as well as a soft polymer material. An overview on GO as a 2 D macromolecule is essential for studying its intrinsic properties and guiding the development of relevant subjects. This review mainly focuses on recent advances of GO sheets, from single macromolecular behavior to macro-assembled graphene material properties. The first part of this review offers a brief introduction to the synthesis of GO molecules. Then the chemical structure and physical properties of GO are presented, as well as its polarity in solvent and rheology behavior. Several key parameters governing the ultimate stability of GO colloidal behavior, including size, p H and the presence of cation in aqueous dispersions, are highlighted. Furthermore, the discovery of GO liquid crystal and functionalization of GO molecules have built solid new foundations of preparing highly ordered, architecture-tunable, macro-assembled graphene materials, including 1 D graphene fibers, 2 D graphene films, and 3 D graphene architectures. The GO-based composites are also viewed and the interactions between these target materials and GO are carefully discussed. Finally, an outlook is provided in this field, where GO is regarded as macromolecules, pointing out the challenges and o

关键词： Graphene 2D macromolecules Macro-assembly

Solvent-free synthesis of zeolite catalysts

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Science China Chemistry 2015年第1期58卷 6-13页

作者： Xiangju Meng Qinming Wu Fang Chen Feng-Shou Xiao key Lab of Applied Chemistry of zhejiang province Department of Chemistry Zhejiang University

The most used method for preparation of zeolites is hydrothermal synthesis from silicate or aluminosilicate gels at temperatures in the range of 60-200 ℃. Excess water used in the industrial process results in several issues, including high autogeneous pressure, low efficiency, pollution, etc. To solve these problems, several strategies have been developed. This review describes the solvent-free synthesis of zeolites. The combination of solvent-free synthesis and organotemplate-free synthesis can open the pathway to a highly sustainable zeolite synthesis protocol in industry.

关键词： zeolites solvent-free sustainable

Fluorous Biphase System of C9F18 and Its Use in Esterification

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Chinese Journal of Chemical Engineering 2007年第6期15卷 906-908页

作者：史鸿鑫项菊萍武宏科 State key laboratory Breeding Base of Green Chemistry synthesis-Technology Zhejiang University of TechnologyHangzhou 310032China

Some apolar organic solvents is miscible with perfluorous nonene to form fluorous biphase *** nonene could be used as a green solvent in equimolar esterification of carboxylic acids with alcohols without removal of water or ester formed. Perfluorous nonene made the esterification equilibrium to move right and the yields of esterification to enhance in different degrees as compared with that in the absence of perfluorous nonene. After esterification perfluorous nonene is easy to be recovered and recycled.

关键词： perfluorous nonene fluorous biphase system esterification green solvent

Anionic Copolymerization of Carbonyl Sulfide with Epoxides via Alkali Metal Alkoxides

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Chinese Journal of Chemistry 2018年第7期36卷 625-629页

作者： Cheng-Jian Zhang Jia-Liang Yang Lan-Fang Hu Xing-Hong Zhang MOE key laboratory of Macromolecular synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou Zhejiang 310027 China

Carbonyl sulfide （COS）, an analogue of carbon dioxide （CO2）, can be converted to CO2 via the carbonic anhydride enzymes widely existing in nature. COS is an ideal monomer for making poly（monothiocarbonate）s, which are difficult to synthesize by traditional methods. Herein, for the first time, we describe an anionic copolymerization of COS with epoxides using alkali metal alkoxides as the catalysts （initiators）, affording poly（monothiocarbonate）s with 100% alternating degree, 〉99% tail-to-head （T-H） content, high number-average molecular weights （Mns, up to 90.3 kg/mol） with narrow molecular weight distributions （D=Mw/Mn, 1.05-1.31 for COS/propylene oxide copolymers） under solvent-free and mild conditions. Oxygen-sulfur exchange reaction （O/S ER）, which can result in the production of contaminated dithiocarbonate and carbonate units in the main chain, was nearly completely depressed at 0 ℃. In addition, in contrast to previously reported salen chromium （iron） complexes that required multiple synthetic steps, this work provides simple, low-cost, and effective catalysts for making colorless sulfur-containing polymers.

关键词： carbonyl sulfide copolyrnerization alkali metal alkoxides sulfur-containing polymer

Three-dimensional interconnected cobalt oxide-carbon hollow spheres arrays as cathode materials for hybrid batteries

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Progress in Natural Science:Materials International 2016年第3期26卷 253-257页

作者： Jiye Zhan Xinhui Xia Yu Zhong Xiuli Wang Jiangping Tu State key laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and School of Materials Science and Engineering Zhejiang University

Hierarchical porous metal oxides arrays is critical for development of advanced energy storage ***, we report a facile template-assisted electro-deposition plus glucose decomposition method for synthesis of multilayer CoO/C hollow spheres arrays. The CoO/C arrays consist of multilayer interconnected hollow composite spheres with diameters of350 nm as well as thin walls of20 *** hollow spheres architecture with 3D porous networks are achieved. As cathode of high-rate hybrid batteries, the multilayer CoO/C hollow sphere arrays exhibit impressive enhanced performances with a high capacity(73.5 m Ahg-1at 2 Ag-1), and stable high-rate cycling life(70 m Ahg-1after12,500 cycles at 2 Ag-1). The improved electrochemical performance is owing to the composite hollowsphere architecture with high contact area between the active materials and electrolyte as well as fast ion/electron transportation path.

关键词： Cobalt oxide Hollow spheres Cathode Arrays Hybrid battery

Separation of Recombinant Geranylgeranyl Diphosphate Synthase of Deinococcus radiodurans from Expressed Strain Cell Homogenate by Immobilized Metal Affinity Chromatography on a Characterized Monolithic Cryogel Column

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Chinese Journal of Chemical Engineering 2013年第6期21卷 663-669页

作者： SHEN Shaochuan WANG Liangyan SUN Zongtao LI Mingfeng LIU Chengzhi TIAN Bing YUN Junxian HUA Yuejin key laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and zhejiang province Instituteof Nuclear-Agricultural Sciences Zhejiang University Hangzhou 310029 China State key laboratory Breeding Base of Geen Chemistry synthesis Technology College of Chemical Engineering and Materials Science Zhejiang University of Technology Hangzhou 310032 China Department of Virology and-Biotechnology -Zhejiang Academy of-Agricultural Sciences Hangzhou 310021 China

Geranylgeranyl diphosphate synthase （GGPPS） plays a key role in the biosynthesis of antioxidative carotenoid from the extremely radioresistant bacterium Deinococcus radiodurans. In this work, the recombinantGGPPS expressed in Escherichia coli by cloning and transforming the gene dr1395 of D. radiodurans was isolated rapidly by an immobilized metal affinity supermacroporous cryogel, i.e., Cu2＋-iminodiacetic acid （IDA）-cryogel. The properties of the Cu2＋-IDA-cryogel were characterized using capillary-based mathematical model and experi- mental measurements. The obtained protein samples were analyzed by the sodium dodecyl sulfate-polyacrylamide gel electrophoresis （SDS-PAGE）. The porosity of the present Cu2＋-IDA-cryogel is 90.4% and the water permeability is 5.04x10-12 m2. From the capillary-based model, this cryogel presents a slightly wide normal pore （capillary） size distribution with the mean diameter of 55.2 μm, the standard deviation of 28.0 μm and the half of skeleton wall thickness of 2.8 μm. The pore size distribute from about 10 to 141 μm and the effective tortuosity of these capillary pores increases from 2.60 to 9.05. The isolation of the GGPPS from cell homogenate can be achieved at the flow velocity of 3.40x 10-4μm. s-1 by the Cu2＋-IDA-cryogel bed. High-purity GGPPS （about 91.4%） is obtained according to the SDS-PAGE analysis of the elution samples, indicating that the present method is a promising, simple and ef- fective atmroach to isolate GGPPS from cell homoenate of engineering, strains.

关键词： chromatography separation protein modeling bactenum

Homopolymerization and Copolymerization of Adipic Anhydride with ε-Caprolactone Catalyzed by Rare Earth Trisphenolate

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Chinese Journal of Chemistry 2007年第3期25卷 395-399页

作者：陈枫朱蔚璞沈之荃 key laboratory of Macromolecule synthesis and Functionalization of Ministry of Education Institute of Polymer Science Zhejiang University Hangzhou Zhejiang 310027 China

The ring-opening polymerization of adipic anhydride and the ring-opening copolymerization of adipic anhydride with ε-caprolactone catalyzed by single component rare earth trisphenolate have been reported. The structu... 详细信息

关键词： poly(adipic anhydride) block copolymer rare earth catalyst ring-opening polymerization