简介：ＴＨＥＲＥＶＩＳＥＤＳＴＲＵＣＴＵＲＥＯＦＧＮＥＴＩＦＯＬＩＮＡ￥ＺｈｉＭｉｎＷＡＮＧ；ＸｉａｏＴｉａｎＬＩＡＮＧａｎｄＳｈｕＦｅｎｇＣＨＥＮ（ＩｎｓｔｉｔｕｔｅｏｆＭａｔｅｒｉａＮｅｄｉｃａ，Ｃｈｉｎｅｓｅ．ＡｃａｄｅｍｙｏｆＭｅｄｉｃａｌＳｃｉｅ...

简介：Potassiumα-andβ-trivanadoenneatungstogermanateswerepreparedandcharacterizedbymeansofelementalanalysis,IR,51Vand183WNMRspectraandpolarography.Thesinglecrystalstructureofa-isomerwasdetermined.ThefinalRis0.083.TheresultsshowthattwopreparedheteropolyanionshaveKegginstructure,anda-isomerbelongstoA-typeandhasstrongeroxidizingabilitythanβ-isomer.

简介：Theelectrochemicaloxidationofdiphenylamineinacetonitrileproducesanadherentuniformpolymerfilmwhichexhibitsmutiplecolourvariation(yellow-green-blue)inawiderangeofpotentialscan.Thepolymerizationmechanismandthestructureofthepolymerwerestudiedbycyclicvoltammetry,FT-IRandinsituESR.Theresultsindicatethattheelectrochemicalpolymerizationofdiphenylaminebelongstoacationicradicalpolymerizationprocess.Duringelectrolysis,onlyoligomerswereinitialyproduced,thenpolymerfilmwasformedontheelectrodesurface.Theelectropolymerizationperformsviathe4,4’C-Cphenyl-phenylcouplingmechanism.

简介：Tetradecyldimethylbenzylammoniumsalt(TDMBA)cationswereintercalatedintosodiummontmorillonite(Na-MMT)byanionexchangereaction.TheresultingTDMBA-MMTwascharacterizedbyFourier-transforminfraredspectroscopy(FTIR),thermogravimetricanalysis(TGA),andX-raydiffraction(XRD).Moreover,theantibacterialactivityandwater-resistanceofTDMBA-MMTwereinvestigated.TheresultsshowthatTDMBAcationsareintercalatedintotheNa-MMT.TheonsettemperatureofdecompositionofTDMBAcationsinTDMBA-MMTisraisedabout60℃higherthanthatoftetradecyldimethylbenzylammoniumchloride(TDMBACl),andthed_((001))spacingenlargedfrom1.23nmto2.10nm.0.1mg/mLTDMBA-MMTisfullyenoughtokillalltheStaphylococciaureus(S.aureus)andmorethan99.99%oftheEscherichiacoli(E.coli)inasamplesolutionwithin6.0htouch,andtheTDMBA-MMTalsoshowslongactingproperties.

简介：ＴＨＥＣＨＥＭＩＣＡＬＳＴＲＵＣＴＵＲＥＯＦＣＥＬＡＳＴＲＩＮＥＦＲＯＭＣＥＬＡＳＴＲＵＳＦＬＡＧＥＬＬＡＲＩＳ￥ＭｉｎｇＡｎＷＡＮＧ；ＭｉｎＷＡＮＧ；ＪｕｎＬＩＵ；ＦｕＨｅｎｇＣＨＥＮ（ＤｅｐａｔｍｅｔｏｆＡｐｐｌｉｅｄＣｈｅｍｉｓｔｒｙ，Ｂｅｉｊ...

简介：ThecrystalstructureofNi(Ⅱ)complexwith3-hydroxyl-1,5-diazacycloheptane-N,N’-diacetatewasdeterminedbyX-raydiffractionmethod.CrystaldataforNi2(C9H14N2O5)2·2H2O:monoclinic,spacegroupP21/n,a=1.1717(5),b=0.9794(3),c=1.2971(2)nm,β=96.62(3),V=1.4786(7)nm3,Dc=1.377g/cm3,Z=2,μ=13.321cm-1(Mo-Kα),F(000)=640.ThefinalRandRware0.075and0.089respectively.TheNi(Ⅱ)ionforms2:2complexwithligand.TwoligandsarebridgedbytwoNi(Ⅱ)atomswhicharebridgedbytwoOatoms.EveryNi(Ⅱ)iscoordinatedbytwoNatomsandfour0atoms.ThecoordinationpolyhedronoftheNi(Ⅱ)ionisadistortedoctahedron.

简介：Anovellayeredoxouraniumphosphiteopen-structure[(C10H24N2)(H2O)][(UO2)2(HPO3)3](denotedasTJPU-8,TJPU=TianjinPolytechnicUniversity)washydrothermallysynthesizedwithisophorondiamine(IPDA)asthetemplate.SinglecrystalstructurerefinementdisclosedthatTJPU-8crystallizedinthemonoclinicspacegroupP21cwithcellparametersa=1.8346(9)nm,b=0.6734(1)nm,c=2.0639(0)nm,β=114.61(5)°,V=2.3182(8)nm3,Z=2.TJPU-8wasconstructedbyUO7monomer,U2O12dimerandHPO3groups.ThemonomericUO7ordimericU2O12wasconnectedbyHPO3groupstoformtwotypesof4-ringchains.AnundulatingsheetwasthengeneratedbyconnectingthesetwotypesofchainsviaHPO3bridges.ThelayerstructureformedbystackingthesheetsalongtheadirectionviathestrongH-bondsoforganoaminecationsandwatermoleculesintercalatedintheinterlayerspaceswiththeframeworkoxygenatoms.Althoughamixtureofcis-andtrans-IPDAwasused,onlycis-IPDAservedasthetemplate.AtypicalgreenlightemissionofTJPU-8isobservedwhenexcitedby266nmlaser.

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简介：Themetalcomplexesofpolyazacryptandhaveattractedmuchattentionowingtotheirspecialstructure,unusualphoto-chemical,electricalandcatalyticproperties.Recently,LehnandNelsonsynthesizedsuccessivelyaseriesofcryptandsandcrypatateswithhighyieldby(2+3)schiff-basecondensationoftris(2-aminoethyl)amineandaryldialdehyde.Butsofar,littleworkabouttheanalogueswithlargercavitiesandflexiblechainscondensedbytris(3-aminopropyl)amine(abbr.

简介：Thecrystallinityofethylene-butenecopolymerspreparedbycopolymerizationofethyleneandbuteneinthepresenceofanewhighlyactivecatalystwasstudiedbymeansofDSC,WAXDandDMA.Theresultsshowthatthemeltingtemperature,thecrystallinityandthecrystallitesizedecreasedwithincreasingthecontentofbuteneinthecopolymers.Thecopolymershaveahighdegreeofbranching,thebutenesegmentsaremainlyintheamorphousregionsofthecopolymers,whilethepolyethylenesequenceformscrystalphaseactingascrosslinkingbondagebetweenthemoleculesatroomtemperature.Theethylene-butenecopolymershavealowmodulus,alowstressandahighstrainanalogoustothestress-strainbehaviorofnon-crossthermoplasticelastomer.

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简介：Theexactstructureofanarginine-carboxylatesaltbridgeindifferentchemicalenvironmentsremainsacontroversialproblem.Inthepresentwork,thezwitterionicandneutralformsofarginine-carboxylatesaltbridgewerestudiedbytheB3LYP/6-311G(d,p)//PM3method.Itturnsoutthattheneutralformsaremorestablethanthezwitterioniccoumterpartsingasphase.However,whnenboundbyα-cyclodextrin,thezwitterionicformsbecomemorestablethanthecorrespondingneutralones.Itissuggestedthatthehydrophobicenvironmentprovidedbythecyclodextrincavityleadstosuchbehavior.Therefore,thesaltbridgestillcouldbeinazwitterionicforminthehydrophobicinterioroftherealproteins.

简介：Theelectronicstructureof(001)polarsurfaceofcubiczirconiawasstudiedbyGGA(WC)approximation.Wefoundthecubiclatticenear(001)surfaceshowedanintensivetendencytotransfertotetragonallattice.Themetallicstateappearedonboththeterminations.ForO-termination,someO2pstateswerevacatedandholecarriersconcentratedonsurfaceoxygen-ions.ForZr-ermination,someZr4dstatesbecamepartialoccupiedforthelossofO2pstates.Weobservedtheholestatesweremainlylocalizedatthecorrespondingionsonsurfaceforboththeterminations,whilethechargestatesonZr-terminationweredispersedonsurface.

简介：在这研究，trans芪的相片异构化在由使用钠dodecyl硫酸盐(SDS)的微乳液，dodecyl修剪乙醇铵溴化物(DTAB)和cetyl整修的油(W/O)在水里被执行乙醇铵溴化物(CTAB)作为表面活化剂分别地。这反应上的微乳液的催化效果是仔细与表面活化剂的结构有关。当没有photosensitizer9,10-dicyanoanthracene(DCA)时，，有更短的恐水病的链的表面活化剂面对DCA被比较喜欢，与一个离子的极的组一起的表面活化剂被比较喜欢。

简介：有0.2–的直径的新宏观规模的SBA-15范围；0.5公里被sol–准备；胶化方法，tetrabutylorthosilicate(TBOS)在被用作硅来源和triblock共聚物和polyoxyethylene辛基酚醚(OP-10)(P123)被用作模板。结果球形的样品被XRD描绘，N2adsorption–；解吸附作用，TEM和SEM方法。结果证明SBA-15宏范围的内部结构有宏多孔的隧道(0.5μ；m)并且我酣睡的骨骼(4–；5nm)。有层次毛孔结构的这些SBA-15宏范围为Emodin分子表明高吸收能力。

简介：ThestructureofaggregationstateandisothermalcrystallizationbehaviorofNylon-1010havebeenstudiedbyWAXD,DSE,Variance-RangeFunctionanddensitymeasurement.TheresultsshowthatcrystallizationofNylon-1010hasthemostsuitableannealingtemperature,thecrystalsoftheNxlon-1010aretwo-dimensionheterogeneousnucleation.Bothlowtreatmenttemperatureandhighcrystallizationte,temperaturearedisadvantageousforNylon-1010crystalgrowth.

简介：Thermalstabilizationisanimportantprocessincarbonfibers＇production,duringwhichthepolyacryloni-trilefibersareheatedfrom180℃to280℃inair.Inthisstudy,thesampleswerecharacterizedbyX-raydiffraction,Fourierinfraredspectroscopy,differentialscanningcalorimetry,smallangleX-rayScattering（SAXS）andmechanicaltensiletests.Anewrulewassuggestedbytheresultsofstructuralcharacterizationforthecyclization,dehydrogena-tionandoxidationreactionsthatwereobservedtobedrasticfrom200℃to220℃,from220℃to250℃,andinthelaterperiodofthethermalstabilizationreactions,respectively.Thesizes,shapesanddistributionsofthesealedmicroporeswereobtainedfromtheSAXSdata.Thebreakingelongationwassignificantlyaffectedbythedrasticcyclizationanddehydrogenationreactions.Thebreakingforcewasaffectedconsiderablybythebiggermicropores,especiallyfrom220℃to250℃,owingtothedrasticdehydrogenationreactions.

简介：Thefollowingdocumentationisanevaluationofthetwo-dimensionalMadelungconstantfortheNaClstructure.TheinfiniteseriesforthestructureisformultedasThefirsttermintheformulaconvergesto41n2.TheseriesafterK=2inthesecondtermisputtogetherwiththethirdtermandaconstant-4/2isleft.ThecombinationofthethirdtermandtheseriesafterK=2inthesecondtermisassumedtobe8Sn.TheconvergingseriesSncanbesolvedonacomputer.Thesevensignificantfiguresofthetwo-dimensionalMadelungconstantfortheNaClstructureisthendeterminedas1.615558.

简介：ThetitlecomplexEu(Ⅲ)(TTA)3(phen)(whereTTA=thenoyltrifluoroacetonemonoanion;phen=1,10-phenanthroline)hasbeensynthesizedinmixedsolventsofacetoneandethanol(1:1volumeratio)anditscrystalstructurehasbeendeterminedbyX-raydiffraction.Thecomplexcrystalsaretriclinic,spacegroupP1(#2)withcelldimensionsofa=1.3241(2)nm,6=1.5278(4)nm,c=0.9755(3)nm,α=92.49(2)°,β=102.57(2)°,γ=91.62(2)°,V=1.9268(8)nm3,Z=2,μ(MoKα)=18.77cm-1,Dx=1.720g/cm3.ThecoordinationgeometryofEuatomisadistortedsquareantiprism,andtheencapsulatedstructurethatcanmeetthestructuralrequirementofthetypicaleuropiumluminescentsensor.Thefluorescencespectrumsuggeststhatthecomplexisastrongphotoluminescentmaterial.

简介：Theaggregationbehaviorandstructureofhydrophobicallymodifiedblockcopolymersofacrylamideand2-phenoxylethylacrylatewereinvestigatedbyviscometry,1HNMRrelaxation,2DNOESY,fluorescenceanddynamiclightscattering.Itwasfoundthattheaggregationbehaviorwasstronglydependentontheconcentrationofpolymersolutionandthehydrophobecontents.Withvaryingconcentrationfrom2.0,6.0,8.0to12.0g/L,thereweredifferentaggregatemorphologiesdistributedinaqueoussolutions,suchasmonopolymerchain,micelle-likeaggregate,multi-micelleaggregateandcross-linkednetwork.Accordingtothemodelofaggregation,itcangiveareasonableexplanationonthelargemagnitudeenhancementofviscositywiththeincreasingofpolymerconcentration.Additionaldataof2DNOESYandfluorescenceshowthatthecopolymerwithhigherhydrophobecontent(molarfraction≥1%)islikelytoformintra-molecularassociation.