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Hy.rothermal Preparation, Cry.tal Structure and Properties of {[ZnTCPP（EtOH）][Zn（en）]2}n（EtOH）2n with a Novel Two-Dimensional （2-D） Motif

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Chinese Journal of Chemistry 2012年第2期30卷 273-276页

作者： chen,Wentong School of Chemistry.and Chemical Engineering Institute of Applied ChemistryJiangxi Province Key Laboratory of Coordination ChemistryJinggangshan UniversityJi'anJiangxi343009China

A novel zinc porphy.in, {[ZnTCPP（EtOH）][Zn（en）]2},（EtOH）2, （1）（TCPP=meso-tetra（4-carboxy.heny.）- porphy.in; EtOH=ethanol; en=ethy.enediamine） was obtained via a hy.rothermal reaction and characterized by.single-cry.tal X-ray diffraction. Complex 1 cry.tallizes in the space group C2/c of the monoclinie sy.tem with eight formula units in a cell： a=32.465（4） A, b=10.527（3） A, c=31.845（3） A,β=95.524（6）°, V=10832（4） A3, C58H57NsOaIZn3, Mr= 1238.23, Dc= 1.518 g/cm3, S=1.005, μ（Mo Kα）= 1.388 mm-1, F（000）=5112, R=0.0650 and wR=0.1574. Complex 1 features a novel 2-D lay.red motif. The spectral data of UV-vis, FT-IR and fluorescence are reported.

关键词： cry.tal fluorescence hy.rothermal porphy.in meso-tetra(4-carboxy.heny.)-porphy.in (TCPP)

X-ray-charged bright persistent luminescence in Nay._(4):Ln^(3+)@Nay._(4) nanoparticles for multidimensional optical information storage

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Light(Science & Applications) 2021年第7期10卷 1362-1371页

作者： y.xi Zhuang Dunrong chen Wenjing chen Wenxing Zhang Xin Su Renren Deng Zhongfu An Hongmin chen Rong-Jun Xie State Key.Laboratory.of Phy.ical Chemistry.of Solid Surface Fujian Provincial Key Laboratory of Materials Genome and College of MaterialsXiamen UniversityXiamen 361005China Institute for Composites Science Innovation School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China School of Materials Science and Chemical Engineering Ningbo UniversityNingboZhejiang 315221China Key.Laboratory.of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech UniversityNanjing 211800China State Key.Laboratory.of Molecular Vaccinology.and Molecular Diagnostics&Center for Molecular Imaging and Translational Medicine School of Public HealthXiamen UniversityXiamen 361102China

Nay._(4):Ln^(3+),due to its outstanding upconversion characteristics,has become one of the most important luminescent nanomaterials in biological imaging,optical information storage,and anticounterfeiting ***,the large specific surface area of Nay._(4):Ln^(3+)nanoparticles generally.leads to serious nonradiative transitions,which may.greatly.hinder the discovery.of new optical functionality.with promising *** this paper,we report that monodispersed nanoscale Nay._(4):Ln^(3+),unexpectedly.can also be an excellent persistent luminescent(PersL)*** Nay._(4):Ln^(3+)nanoparticles with surface-passivated core–shell structures exhibit intense X-ray-charged PersL and narrow-band emissions tunable from 480 to 1060 nm.A mechanism for PersL in Nay._(4):Ln^(3+)is proposed by.means of thermoluminescence measurements and host-referred binding energy.HRBE)scheme,which suggests that some lanthanide ions(such as Tb)may.also act as effective electron traps to achieve intense *** uniform and spherical Nay._(4):Ln^(3+)nanoparticles are dispersible in solvents,thus enabling many.applications that are not accessible for traditional PersL phosphors.A new 3-dimensional(2 dimensions of planar space and 1 dimension of wavelength)optical information-storage application is demonstrated by.inkjet-printing multicolor PersL *** multicolor persistent luminescence,as an emerging and promising emissive mode in Nay._(4):Ln^(3+),will provide great opportunities for nanomaterials to be applied to a wider range of fields.

关键词： luminescence intense dimensions

Shear-induced Precursors of Fibrillar Cry.tals of Poly.butene-1):A Rheological Study

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Chinese Journal of Poly.er Science 2022年第6期40卷 618-623页

作者： Jia-Qi Zhang Quan chen State Key.Laboratory.of Poly.er Phy.ics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University.of Science and Technology.of China Hefei 230026China

Strong preshear flow stretches poly.butene-1)chains to form flow-induced precursors of fibrillar *** formation leads to further growth of shear/normal stress after the stress reaches the steady.*** this study.stress relaxation measurements are performed after intervals of a strong flow during which the precursors *** small-angle X-ray scattering(SAXS)and wide-angle X-ray diffraction(WAXD)measurements are conducted to characterize the cry.talline structure formed after the preshear and relaxation processes,each of different periods.A combination of the stress relaxation and scattering results reveal that for the precursors formed within 5 s,the stress can fully.relax and the orientation of the subsequent cry.tals(formed upon quenching the sample at different stress levels)decay. gradually.with the *** comparison,for those precursors formed after 5 s,the stress hardly.relaxes during~10^(4) s,and the orientation of the subsequent cry.tals hardly.decay.,suggesting that the precursors have been somehow stabilized during the *** features have been discussed with respect to the percolation of the precursors to form a reversible network.

关键词： PB-1 Rheology Precursor Fibrillar cry.tal

Highly.antibacterial rGO/Cu2O nanocomposite from a biomass precursor:Sy.thesis,performance,and mechanism

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Nano Materials Science 2020年第2期2卷 172-179页

作者： Mingguang chen Zhi Li Long chen Department of Materials Science and Engineering King Abdullah University of Science and Technology(KAUST)Thuwal23955-6900Saudi Arabia Department of Chemical and Environmental Engineering University of CaliforniaRiversideCA92521United States California State University San BernardinoCA92407United States Department of Civil and Environmental Engineering Northeastern UniversityBostonMA02115United States

Reduced graphene oxide(rGO)has been widely.used to fabricate electronics,sensors,photodetectors,and in other ***,the antibacterial performance of pristine rGO is relatively.*** application of rGO in biomedical devices,smart food packaging,and water desalination membranes requires further improvement of rGO’s antibacterial ***(I)oxide(Cu2O)is an effective antibacterial agent,which denatures protein and enhances the permeability.of cell *** this work,we report a simple method of sy.thesizing a highly.antibacterial rGO/Cu2O nanocomposite from cellulose acetate,a derivative of abundant natural *** sy.thesized rGO/Cu2O nanocomposite was thoroughly.characterized by.Raman spectroscopy.X-ray powder diffraction(XRD),X-ray photoelectron spectroscopy.XPS),atomic force microscopy.AFM),scanning electron microscopy.SEM),high-resolution transmission electron microscopy.HRTEM),and scanning transmission electron microscopy.STEM).Then,the antibacterial abilities of rGO/Cu2O nanocomposite were evaluated and a bactericidal mechanism was revealed from the molecular biology.*** indicate that our sy.thesized rGO/Cu2O nanocomposite owns strong antibacterial activity.mainly.stemming from the uniformly.incorporated Cu2O nanocry.tals with a lateral size of 5–40 nm.

关键词： Cellulose acetate rGO/Cu2O nanocomposite Antibacterial

Investigation on Electronic Property.of Passive Film on Nickel in Bicarbonate/Carbonate Buffer Solution

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Chinese Journal of Chemistry 2011年第2期29卷 243-253页

作者： Li Dangguo Wang Jiadao chen Haosheng chen Darong State Key.Laboratory.of Tribology Tsinghua University Beijing 100084 China

The electronic properties of passive film formed on nickel in bicarbonate/carbonate buffer solution were studied by.electrochemical impedance spectra （EIS） and Mott-Schottky.plot. The film composition was analy.ed by.X-ray photoelectron spectroscopy.（XPS）. The results showed that passive film exhibited p-ty.e semi-conductive character, and the acceptor density.（NA） decreased with increasing potential, prolonging time, decreasing temperature, increasing pH value and decreasing chloride/sulfur ions concentration. The transfer resistance and film resistance increased with the above factors changing. XPS results showed that passive film was composed of NiO and a little amount of Ni2O3.

关键词： nickel electrochemical impedance spectra (EIS) X-ray photoelectron spectroscopy.(XPS) passive films

Wear and transfer characteristics of carbon fiber reinforced poly.er composites under water lubrication

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中国有色金属学会会刊:英文版 2004年第Z1期14卷 332-340页

作者： JIA Jun-hong chen Jian-min ZHOU Hui-di chen Lei State Key.Laboratory.of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

The tribological characteristics of carbon fiber reinforced poly.er composites under distilled-water-lubricated-sliding and dry.sliding against stainless steel were comparatively.investigated. Scanning electron microscopy.(SEM) was utilized to examine composite microstructures and modes of failure. The ty.ical chemical states of elements of the transfer film on the stainless steel were examined with X-ray photoelectron spectroscopy.(XPS). Wear testing and SEM analy.is show that all the composites hold the lowered friction coefficient and show much better wear resistance under water lubricated sliding against stainless steel than those under dry.sliding. The wear of composites is characterized by.plastic deformation, scuffing, micro cracking, and spalling under both dry.sliding and water lubricated conditions. Plastic deformation, scuffing, micro cracking, and spalling, however, are significantly.abated under water-lubricated condition. XPS analy.is conforms that none of the materials produces transfer films on the stainless steel counterface with the ty.e familiar from dry.sliding, and the transfer of composites onto the counterpart ring surface is significantly.hindered while the oxidation of the stainless steel is speeded under water lubrication. The composites hinder transfer onto the steel surface and the boundary.lubricating action of water accounts for the much smaller wear rate under water lubrication compared with that under dry.sliding. The easier transfer of the composite onto the counterpart steel surface accounts for the larger wear rate of the poly.er composite under dry.sliding.

关键词： friction and wear transfer film water lubrication carbon fiber poly.er composite

MIL-101@MF复合材料-枪头高效固相萃取鸡蛋中酰胺醇类抗生素残留

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分析测试学报 2025年第1期44卷 180-187页

作者：王晓张洪铭常晨阳庞月红江南大学食品学院江苏无锡214122 枣庄海关山东枣庄277000 临沂海关综合技术服务中心山东临沂276000 聊城海关山东聊城252000

将Fe-MIL-101通过聚偏二氟乙烯固定在三聚氰胺泡沫(MF)上制备MIL-101@MF复合材料,将其用做枪头固相萃取(PT-SPE)的吸附剂,并结合液相色谱-串联质谱法实现了鸡蛋中酰胺醇类(CAPs)抗生素的高效测定。对MIL-101@MF的形貌、晶体结构和官能... 详细信息

将Fe-MIL-101通过聚偏二氟乙烯固定在三聚氰胺泡沫(MF)上制备MIL-101@MF复合材料,将其用做枪头固相萃取(PT-SPE)的吸附剂,并结合液相色谱-串联质谱法实现了鸡蛋中酰胺醇类(CAPs)抗生素的高效测定。对MIL-101@MF的形貌、晶体结构和官能团进行了表征,证实了Fe-MIL-101的成功合成并固定在MF上。优化了PT-SPE萃取条件,在多反应监测模式下,以基质标准曲线结合内标法同时测定氯霉素(CAP)、甲砜霉素(TAP)、氟苯尼考(FF)。由于氢键、π-π、静电等相互作用,MIL-101@MF对3种CAPs具有极高的萃取能力,萃取过程小于3 min,材料可重复使用60次。3种CAPs的定量下限为0.1μg/kg,加标回收率为78.2%~108%。采用该方法测定80批次鸡蛋样品,TAP的检出率2.50%,含量为0.21~1.2μg/kg;FF的检出率8.75%,含量为0.47~4.2μg/kg。该方法操作简便、灵敏度高且定量准确,有望应用于动物源性食品中多兽药残留的预处理中,为我国进出口食品安全残留监控提供技术支撑。

关键词：金属有机骨架材料三聚氰胺泡沫枪头固相萃取液相色谱-串联质谱法鸡蛋酰胺醇类

Soluble and Degradable Poly.mides with Pheny.-2-py.idy. Ether Structure:Sy.thesis and Characterization

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Chinese Journal of Poly.er Science 2015年第3期33卷 481-489页

作者：杨逢春 Jing Wang Lin chen Xin Wang Xiang-y. chen 张欣 Key.Laboratory.of Sy.thetic and Natural Functional Molecule Chemistry.of Ministry.of Education College of Chemistry and Materials ScienceNorthwest University Samsung China Semiconductor Company.Limited. Shaanxi Provincial Key.Laboratory.of Electroanaly.ical Chemistry Institute of Analytical ScienceNorthwest University

A diamine monomer o-pheny.enedioxy.is（5-amino-2-py.idine） was sy.thesized via reduction of a dinitro compound o-pheny.enedioxy.is（5-nitro-2-py.idine）, producing a series of new poly.mides from this diamine and various commercially.available aromatic dianhy.rides via conventional two-stage processes. The resulting poly.mides are able to form tough and transparent films, with decomposition temperatures in the range of 529-551 ℃, and can be dissolved in organic polar solvents. Meanwhile, these poly.mides can be degraded in a hy.razine hy.rate medium, a degradation mechanism proposed by.analy.ing the degradation products suggests that the degradable properties could be attributed to the pheny.-2-py.idy. ether structure in the poly.er. In addition, the transformation of the compound structure from dinitro compound to damine monomer in the sy.thetic process is discussed in respect to X-ray structure.

关键词： Monomer structure Poly.er solubility Degradable poly.mide.

Cataly.ically.active interfaces in titania nanorod-supported copper cataly.ts for CO oxidation

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Nano Research 2020年第2期13卷 533-542页

作者： Wasim U.Khan Season S.chen Daniel C.W.Tsang Wey.y.ng Teoh Xijun Hu Frank L.y.Lam Alex C.K.y.p Department of Chemical and Process Engineering The University.of Canterbury Christchurch 8041New Zealand Department of Civil and Environmental Engineering.The Hong Kong Poly.echnic University Hong Kong.China School of Chemical Engineering The University of New South WalesSydneyNSW 2052Australia Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyHong KongChina

One-dimensional titanium dioxide nanorod(TNR)-supported Cu cataly.ts(2.5 wt.%-12.5 wt.%)were sy.thesized using deposition-precipitation.X-ray photoelectron spectroscopy.temperature programmed reduction and CO chemisorption measurements showed that Cu doping over TNR offered metal-support interactions and interfacial active sites that had a profound impact on the cataly.ic *** role of the Cu-TNR interface was investigated by.comparing the cataly.ic activity.of Cu-TNR cataly.ts with that of pure CuO nanoparticles in CO *** presence of highly.dispersed copper species,a high number of interfacial active sites,CO adsorption capacity.and surface/lattice oxy.en were found to be responsible for the excellent activity.of 7.5CU-TNR(ie,Cu loading of 7.5 wt.%on TNR).Moreover,the Cu-TNR cataly.ts followed the Langmuir-Hinshelwood reaction mechanism with 7.5CU-TNR,exhibiting an apparent activation energy.of 44.7 kJ/*** TNR-supported Cu cataly.t gave the highest interfacial cataly.ic activity.in medium-temperature CO oxidation(120-240℃)compared to other commonly.used supports,including titanium dioxide nanoparticles(TiO2-P25),silica(SiO2)and alumina(Al20g)in which copper species were nonhomogeneously.*** study.confirms that medium-temperature CO oxidation is highly.sensitive to the morphology.and structure of the supporting material.

关键词： supported cataly.ts nanorod oxy.en species interfacial active sites CO oxidation