简介:Thesolidaddofthefirstprotonatedzincoborophosphate,(H3O)Zn(H2O)2BP2O8·H2O(1),wassoventothermallysyn-thesizedbythereactionofZn(NO3)2·6H2OandH3BO3withH3PO4inamixedsolvent,andstructurallycharacterizedbysingle-ystalX-raydiffractionanalysis.ItcrystallizesinthehexagonalP6122,a=0.9604(4)nm,c=1.5297(6)nm,V=1.2218(8)nm^3,Dc=2.921g/cm^3,Z=6,F(000)=1080,μ=3.495mm^-1.Thestmchwefeaturesthatthetetrahedra-te-trahedrahdlcesinterconnectedbyoctahedraandstronghydro-gembondinteractionsformathree-dimensionalframework.Theprotonatedwatermoleculesarelocatedatuniquepositions.othercharacterizationsbyIRandthermalanalysisarealsode-scribed.
简介:Theground-stateandthermodynamicpropertiesofquantummixed-spinchainsof1/2-1/2-1-1and3/2-3/2-1-1areinvestigatedbyaquantumMonteCarlosimulationwiththeloop-clusteralgorithm.For1/2-1/2-1-1chain,wefindithastwophasesseparatedbyanenergy-gapvanishingpointintheground-state.For3/2-3/2-1-1chain,thenumericalresultsshowtwoenergy-gapvanishingpointsisolatedbydifferentphasesinitsground-state.Ourcalculationsindicatethatallthesegroundstatephasescanbeunderstoodbymeansofvalence-bond-solidpicture,andthethermodynamicbehavioratfinitetemperaturesiscontinuousasafunctionofparameterα=J2/J1.
简介:AnEmissionofComplexParticlesinCoulombInstabilityinReactions30MeV/u40Ar+159TbandnatAg¥DaiGuangxi,;FuYanbiao;HeZhigong;?..
简介:Light Charged Particles Emitted from Central Collision in Reaction of 25MeV/u 40Ar on natAgLightChargedParticlesEmittedf...
简介:MassYieldDistributionofTargetResiduesfromInteractionofCopperwith40MeV/u40ArIons¥YinXinmin;LiWenxin;ZhangXiang?..
简介:ComparisonbetweenThreefoldFragmentationandSequentialFissionin40Ar+159TbReactionsat30MeV/u¥DaiGuangxi;FuYanbiao;HeZhiyong...
简介:Particle-particleCorrelationandEmissionTimefor40Ar+197AuCollisionsat25MeV/u¥HeZhiyong;DuanLimin;LiZuyu;JinGenmin...
简介:MassYieldDistributionofTargetResiduesfromInteractionofIronwith135MeV/u12CIons¥QinZhi;LiWenxin;ZhaoLin;WenWanx...
简介:Thedipole-length,velocityandaecelerationabsorptionoscillatorstrengthsforthe1s^22p-ls^2nd(3_
简介:Thecrystalandmolecularstructuresof[(C3H7O)2PS2]2(CCDCNo.217201)weredeterminedbymeansofX-raycrystallography.ItcrystallizedinatriclinicsystemwithspacegroupP1^-andlatticeparametersa=0.82794(3)nm,b=0.84764(2)nm,c=0.85034(3)nm,α=97.78(3)°β=110.77(3)°,γ=94.95(3)°,V=0.54701(9)nm^3,Z=1.Inthismolecule,thetwodiisopropyldithiophosphategroups,[(C3H7O)2PS2]2,whichareparalleltoeachother,arelinkedbyanS--Sbondandthereexistinversioncentersinthemolecule,Inthestructure,theP=Sbondsinthetwodithiophosphateunitsaretrans-orientedtoeachother.
简介:Thethermalbehavior,mechanismandkineticparametersoftheexothermicfirst-stagedecompositionofthetitlecompoundinatemperature-programmedmodewereinvestigatedbymeansofDSC,TG-DTGandIR.Thereactionmechanismwasproposed.Thekineticmodelfunctionindifferentialform,apparentactivationenergy(Ea)andpre-exponentialfactor(A)ofthisreactionare(3/2)(1-a)[-In(1-a)]^1/3,185.52kJ/moland10^17.78s^-1,respectively.Thecriticaltemperatureofthethermalexplosionofthecompoundis201.30℃.Thevaluesof△S^≠,△H^≠and△G^≠ofthisreactionare72.46J/(mol·K),175.1kJ/moland141.50kJ/mol,respectively.
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简介:Anewapproachtothesynthesisof2,2″-biflavanonesbythereductivedimerizationoffla-vonesisreported.Theproducts,theracemateandmesobiflavanones,havebeenseparatedandtheirstructureshavebeendeterminedonthebasisoftheirspectraldata.Theconfigurationof3bhasbeendeterminedbyX-raycrystallographyaswell.