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时间:2020-03-26
《K3H3[As2W21O69(H2O)]·19H2O的合成及晶体结构.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
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—
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