简介：由硝酸镉和2，3-吡嗪二羧酸（简称pdc）水热反应，得到无色透明针状单晶．经X射线单晶衍射法测定了该晶体的分子结构，其组成为ECd（C6H2N2O4）n或ECd（pac）n．晶体学数据为：三斜晶系，P21／c空间群．a=1．0728（6）nm，b=0．7731（5）nm，c=0．8674（5）nm，β=110．068（5）°，Z=4，μ=3．21mm＆-1.R1=0．023，wR2=0．054．该化合物通过2个Cd与pac中的氧原子配位，形成一个新颖的二维结构．

简介：利用水热法合成了2个新的对咪唑基苯甲酸镉配合物Cd（C10N2O2H7）2·H2O（1）和Cd2（H2O）5（C10N2O2H7）（C9O6H3）·4H2O（2）,通过元素分析、红外光谱和X-射线单晶衍射进行了表征.结果表明：化合物1属于正交晶系,Pnna空间群,a=1.3895（5）nm,b=1.6654（5）nm,c=0.8282（5）nm,V=1.9165（15）nm3,Z=4,R1=0.0263,wR2=0.0793;化合物2属于单斜晶系,P21/c空间群,晶胞参数a=1.3702nm,b=1.7511nm,c=1.2557（4）nm,β=114.819（6）°,V=2.7346（14）nm3,Z=4,R1=0.0573,wR2=0.1667.

简介：采用氢化物发生一原子荧光光谱法测定镉锭中锡含量，研究了基体镉对锡的干扰及消除方法，优化了氢化物的发生条件，建立了镉锭中锡含量的快速分析方法。实验证明，原子荧光光谱法对锡的检出限为0.08mg／kg，回收率为99.0％～104.0％，方法准确、可靠，用于日常样品分析，取得了很好的效果。

简介：采用盐酸、氖氟酸、硝酸、高氯酸分步溶解的方式对具有硅、铁含量高等特性的铜原矿尾矿样品进行溶解。在体积分数为5％的盐酸介质中，利用原子吸收光谱法，采用扣除背景方式对样品溶液进行测定。样品溶解较完全，共存元素对镉的测定基本无干扰。方法重现性较好，准确度较高。相对标准偏差在2．3％～8．3％，加标回收率在96．7％～105％，标准样品分析结果与标准值基本一致。能满足日常分析检测的需要。

简介：采用微波消解-原子吸收光谱法测定了高活性干酵母中铁、铜、锰、铅及镉5种微量元素含量.用微波消解法处理样品,具有简便、快速的优点.方法的标准曲线线性关系良好（r=0.995～0.999）,方法加标回收率在96.0％～103.0％,相对标准偏差（RSD,n=6）在2.0％～4.9％.表明方法具有较好的准确性和重复性,用于实际酵母样品的测定,获得了满意的结果.

简介：在模拟生理条件下,采用分子荧光、紫外光谱法研究了水溶液中Cd2＋与牛血清蛋白（BSA）的相互作用.研究表明,在pH=7.0缓冲液中,以280nm作为激发波长,342nm作为发射波长,Cd2＋对BSA的荧光发射有较强猝灭作用.实验测定了Cd2＋与BSA在289K,306K和319K温度下的结合常数Ka分别为5.31×10^4,5.22×10^4,4.70×10^4,其热力学参数ΔHm=-3.07kJ·mol-1;ΔSm=79.83J·mol-1·K-1.结果表明导致BSA荧光猝灭是由于分子内的非辐射能量转移而引起的静态猝灭,他们之间的主要作用力是静电作用力.

简介：建立了氢还原重量法测定三氯化钌产品大样中钌含量的新方法,研究并优化了测定条件,结合原子吸收光谱法（AAS）、电感耦合等离子体原子发射光谱法（ICP-AES）和氯化铵纯度考察了杂质元素对了分析结果的误差影响.结果表明,钌含量为0.3～0.6g的三氯化钌与5～7g氯化铵能完全形成（NH4）2RuCl6配合物,于约100℃烘干水分、350℃分解铵盐、750℃氢还原为海绵钌和105℃干燥水气的条件下,测定3.94％,5.88％,7.32％,9.47％,10.84％和12.93％含量的钌,极差、标准偏差（S）、相对标准偏差（RSD,n=22）和重复性限（r）分别为±0.01％,0.0030％～0.0050％,0.0369％～0.0761％和0.008％～0.014％.样品加标回收率99.96％～99.98％.方法的结果准确,精密度好,且与YS/T562-2009标准分析方法的吻合.

简介：Twonewdicyanamidecoordinationpolymers,{Mn(dmpz)[N(CN)2]2}2(1)and{Cu(dmpz)[N(CN)2]2}2(2)(dmpz=3,5-dimethylpyrazole),weresynthesizedandcharacterizedbysinglecrystalX-raydiffractionanalysisandIRspectroscopy.In1and2themetalionshavetwodifferentcoordinationmodes,whereoneiscoordinatedtofourdicyanamideanionsandtwomonodentatedmpzmoleculestoformaslightlydistortedoctahedralgeometry,whiletheotheradoptsoctahedralgeometry,surroundedbyfournitrileNatomsandtwoamideNatomsofthedicyanamideanions.Bothcomplexescontaintwoalternatingchainsthatareparalleltoeachother.

简介：ThecrystalstructureofDi-nitratobis（ethylcaprolactam）uranyl（Ⅱ）UO2[CH2（CH2）4CONC2H5]2（NO3）2wasestablishedbyasingle-crystalX-raydiffractionstudy.Itistriclinie,spacegroupP1,witha=7.171（2）,b=8.655（3）,c=10.182（5）A,α=78.27（3）,β=70.63（3）,γ=81.76（3）°,V=581.7（4）A3,Z=l,Dc=1.94g.cm-3.FinalRvalueis0.0218.Theresultrevealsthaturanylioniscoordinatedtosixoxygenatoms,twoofthemarefromtwocarbonylgroupsofethylcaprolactamandtheotherfourarefromtwonitrategroups.

简介：采用量子化学密度泛函方法对N-烷基吡啶阳离子和阴离子AlCl4^-，Al2Cl7^-和Al3Cl10^-进行了全优化计算，得到了阴阳离子的几何构型和净电荷分布．计算发现，吡啶环上的电子数符合4n＋2规则，具有芳香性．吡啶阳离子的LUMO轨道主要由环上原子的2A所贡献，是反键π分子轨道．AlCl4^-，Al2Cl7^-和Al3Cl10^-的HOMO轨道主要由Cl原子的2px所贡献．推测吡啶阳离子的LUMO与阴离子的HOMO相互作用形成离子液体分子．

简介：　　Enantioimericallypure1,l'-bi-2-naphthol(BINOL)1anditsderivativesareimportantchiralligandsandauxiliariesforanumberofasymmetrictransformations1suchasaldolcondensations,alkylations,Diels-Alderreactions,Michaeladditions,epoxidations,etc.Opticallypure1andtheirderivativeshavealsobeenusedextensivelyinchiralrecognition,chiralseparationandintheconstructionoffunctionalisedmaterials2.Furthermore,(R)-and(S)-BINOLarealsofundamentalstartingmaterialsforthesynthesisofalargevarietyofotherchiralbinaphthylssuchasMOP(2c),NOBIN(2d)andBINAP(2e).Asaresultthedevelopmentofefficientandeconomicmethodsforthepreparationofopticallypure1hasattractedmuchattentioninrecentyears3andnovelmethodsfortheresolutionof(±)-1continuetobedeveloped.……

简介：Themononuclearcomplex,[NtCl2(trzCHzCHzCOPh)4]·6H2O(trz=1,2,4-triazole),wassynthesizedanditsstructurewasdeterminedbysinglecrystalX-raydetermination.Itcrystallizesinthemonoclinicsystem,spacegroupP21/c,withlatticepa-rameters:a=0.80391(2)nm,b=1.06215(2)nm,c=2.90133(2)nm,β=94.792(1)°andZ=2.EachnickelatomiscoordinatedbyfourNatomsoftriazolefromfourβ-(1,2,4-IriHole-1-yl)propiophenoneligandsandtwochlorideanionsinarrangementwithoctahedralcoordinationgeometry.Inadditiontothecoordinatingnickelcomplex,therearesixunco-ordinatedwatermolecules.TheNi—Ndistanceis0.24865(8)nmandtheNi—Ndistaneesareintherangeof0.2072(2)to0.2099(2)nm,respectively.Inthesolidstate,theUtiecom-poundformsthreedimensionalnetworkstructurethroughhy-drogenbonds.Theintermolecularhydrogenbondsconnectthe[NiCl2(C2H2N3CH2CH2COPh)4]andH2Omoieties.Thedeepgreencrystalswerealsoexaminedbyelementalanalysis,FT-IRandUVspectra,whichareinagreementwiththestructuralda-ta.

简介：AsimplespectrophotometricassayofH2O2andglucoseusingAgnanoparticleshasbeencarriedout.RelyingonthesynergisticeffectofH2O2reductionandultraviolet(UV)irradiation,Agnanoparticleswithenhancedabsorptionsignalsweresynthesized.H2O2servedasareducingagentintheAgnanoparticlesformationinwhichAg+wasreducedtoAg0byO2àgeneratedviathedecompositionofH2O2inalkalinemedia.Ontheotherhand,photoreductionofAg+toAg0underUVirradiationsalsocontributedtothenanoparticlesformation.ThesynthesizednanoparticleswerecharacterizedbyTEM,XPS,andXRD.TheproposedmethodcoulddetermineH2O2withconcentrationsrangingfrom5.010à7to6.010à5mol/L.Thedetectionlimitwasestimatedtobe2.010à7mol/L.SincetheconversionofglucosetogluconicacidcatalyzedbyglucoseoxidasewascompaniedwiththeformationofH2O2,thesensingprotocolhasbeensuccessfullyutilizedforthedeterminationofglucoseinhumanbloodsamples.Theresultswereingoodagreementwiththosedeterminedbyalocalhospital.Thiscolorimetricsensorthusholdsgreatpromisesinclinicalapplications.

简介：Thecopper(Ⅱ）complex[Cu3(nta)2(azpy)2(H2O2)]·6H2O(nta=nitrilotriacetate,azpy=4,4′-azobispyridine)hasbeensynthesizedandcharacterized.TheX-rayanalysisrevealsthattherearetwokindsofcopper(Ⅱ）coordinationenvironments.Cu(1)hasadistortedsquareplanesymmetryandCu(2)hasadistortedoctahedralsymmetry.Cu(1)islinkedtoCu(2)throughntaandboundtoCu(1C)byazpy,andCu(2)islinkedtoCu(2A)throughazpy,whichextendstotwo-dimensionalnetworkwithlargerhombus1.2nm×1.7nm.

简介：The2-Dheteronuclearcoordinationpolymer{[Ag4Fe2(SCN)12(H2O)2][(inaH)2(H2O)2]}n(1)(inaHistheabbreviationofprotonatedisonicotinicacid)withchemicalformulaC24H20Ag4Fe2N14O8S12hasbeensynthesizedandcharacterizedbysinglecrystalX-raydiffraction,elementalanalysisandIRspectroscopy.TheAgES2ringsconnecttwokindsofoctahedralgeometriesofFe(Ⅲ)ions,[Fe(NCS)6]^3-and[Fe(H2O)E(NCS)4]^-unitswithbridgingthiocyanateionsleadingto2-D[Ag4Fe2(SCN)12(H2O)2]^2-anionframework.Fourkindsofringsincludingtheunprecedentedthirty-twomemberedAg4Fe4(SCN)8ringssharecomersoredgesinthe2-Danionlayerstructure.AllthiocyanatescoordinatetothemetalionsaccordingtotheHSABprinciplewithNatomsbindingtotheFe(Ⅲ)ionsandwithSatomsbindingtoAg(I)ions.Pronoatedinacationsstabilizethelayerstructureascounterionsandhydrogenbondswereformedwithinthepronoatedinacationsdimerandbetweenthedimersandthelatticewaters.Crystaldata:Mr=1560.44,triclinic,P-↑1,a=0.76082(1)nm,b=0.9234nm,c=1.85611(4)nm,α=103.0170(10)°,β=93.7780(10)°,γ=97.4080(10)°,V=1.25385(3)nm^3,Z=1,μ(MoKα)=2.650mm^-1,Dc=2.067g·cm^-3,F(000)=758,R1=0.0412,wR2=0.1003.

简介：SodiumdithioniteinitiatedsulfinatodehalogenationofBrCF2CF2Risstudied.

简介：Thecanonicalandlocatizedmolecutarorbitersof[NCCuS2NoS2]2-clusterwerecalculatedbymeansofCNDOquantumchemistrymethod.Thentheenergyandpropertiesofcorrespondingchemicatbondswerediscussed,especially,Cu-Sb-NothreecenterconjugatedπbondsandNo-St-Noconjugatedπbondswereaccountedfor.

简介：用离子交换法将具有Keggin结构TBA4H3PW7Mo3Cu2O38（H2O）2（M=Fe2＋，Co2＋，Cu2＋，Ni2＋和Mn2＋）嵌入到Zn2A1黏土中，得到层状化合物LDH-PW7Mo3Cu2O38（H2O）2（M=Fe2＋，Co2＋，Cu2＋，Ni2＋和Mn2＋），并用XRD，IR，uV对其进行了表征．结果表明：杂多阴离子进入黏土后，仍保留了其Keggin结构．利用合成的层状化合物为催化剂，以顺丁烯二酸与HzO。的环氧化反应为模型反应考察其催化活性，结果表明：层状化合物在环氧化反应中显示优良的催化性能．

简介：ＮＯＶＥＬＯＸＩＤＡＴＩＯＮＯＦＨＥＸＡＢＥＮＺＹＬＨＥＸＡＡＺＡ－ＩＳＯＷＵＲＴＺＩＴＡＮＥＢＹＭｅ２ＣＨＮＯ２／ＣｕＣｌ／Ｐｙ／Ｏ２ＸｉａｏＰｅｉＧＵＡＮ；ＨｏｎｇＹＡＮ；ＪｉａｎＧｕａｎｇＳＵＮ；ＹｏｎｇＺｈｏｎｇＹＵ(ＳｃｈｏｌｏｆＣｈｅ?..

简介：以银离子、3,3′,4,4′-二苯硫酮四羧酸阴离子（tdpc）和4,4′-联吡啶（bipy）,合成了一种新型化合物[十二水合（3,3,′4,4′-二苯硫酮四羧酸）（4,4′-联吡啶）水合银][Ag2（tdpc）（bipy）2][Ag2（bipy）2（H2O）].12H2O,该化合物为链状结构,Ag…Ag相互作用,bipy间的π-π相互作用和氢键作用将化合物联接为三维超分子结构.