K3H3[As2W21O69(H2O)]·19H2O的合成及晶体结构.pdf

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1、第25卷第3期化学研究中国科技核心期刊2014年5月CHEMICALRESEARCHhttp：／／hxya．chinajourna1．net．cnSynthesisandcrystalstructureofK3H3[As2W2lO69(H2o)]·19H2OZHANGFang，MAXing，ZHANGJing，CHENLijuan(CollegeofChemistryandChemicalEngineering，HenanProvincialKeyLaboratoryofP0Dz0mPf口f8ChemsitryHenanUniversity，Kaifeng47

2、5004，Henan，China)Abstract：Plenarypo1yoxotungstateK3H3[As2w21O6g(H20)]·19H2O(1)wasobtainedthroughthestructuraltransformationofdivacantprecursorK14[As2W19O67]·nH2Oinacidicaqueousso—lution．Thestructureofas—obtainedplenarypo1yoxotungstatewascharacterizedbymeansofFouriertransforminfrared

3、spectrometryandsingle—crystalX—raydiffraction．Resultsindicatethatthepolyoxoanionicskeleton[-As2、v21O69(H2O)]一ofcompound1isconstructedfromtwoidenticaltrivacant一AsWgO33]fragmentsthroughthreeW一0groups．Moreover，whatisworthmentioningisthatthereexistsafreewatermoleculeinthecentra1cavityof

4、thepolyoxoanionof1．Keywords：polyoxometalate；arsentungstate；synthesis；crystalstructureCLCnumber：O614．3Documentcode：AArticleID：1008一i011(2014)03—0242一O5K3H3EAs2W2。069(H2o)]·19HO的合成及晶体结构张芳，马杏，张静，陈利娟(Tq南大学化学化工学院，河南省多酸化学重点实验室，河南开封475004)摘要：利用二缺位K[ASWl。O]·nHO前驱体在酸性条件下的结构转变得到了饱和的砷钨酸盐K3H3[A

5、sw。O。(H0)]·19HO(1)，借助傅立叶变换红外光谱和x射线单晶衍射对其结构进行了表征．结果表明，化合物1的多阴离子骨架由两个相同的三缺位—ASw。0。。]9一片段通过三个w—O基团连接而成．值得提及的是，在化合物1的阴离子骨架中t7空腔中存在一个游离的水分子．关键词：多金属氧酸盐；砷钨氧酸盐；合成；晶体结构Asisknowntoall，polyoxotungstates(POTs)areauniqueclassofpolynuclearmetal—oxygenanionicclustersthatexhibitadiversecompositiona

6、lrangeandsignificantstructuralversatility，andtheyareusuallycomposedoftheearlytransitionmetalcenteredWO6polyhedralinkedbysharedcorners，edgesorfaces，sometimeswithadditionalheteroatoms(suchasP。Si，As，etc)incorporatedwithintheclusters[卜．Uptonow，KegginandWells-Dawsonpolyoxoanionsareprobab

7、lythemostfamousPOTs．Duetotheadvantagesoftheirspecificmolecularcomposition，chargedensity，redoxpotentials，solubilitycharacteristicsandwidespreadapplicationsincatalysis，medicine，magnet—ismandmaterialscience．thesynthesisandcharacterizationofnove1arsenotungstates(ATs)arealluringL．IntheRe

8、ceiveddate：20l4—01—