| Heteropolymolybdates with arsenic as a hetero atom are an important class of polyacid compounds.They not only have novel and complex topologies,but also have excellent physical and chemical properties,including reversible multi-electron redox ability,thermal stability and Molecular conductivity makes this type of material have a wide range of potential applications in electrocatalysis,photocatalysis,and energy storage and electrode material fabrication.At present,there are few reports on molybdate,and the study of energy storage properties is just beginning.Therefore,this paper uses simple inorganic materials as raw materials,selects suitable organic ligands,and synthesizes two kinds of{As2Mo6}and six Well-Dawson{As2Mo18}hybrid functional materials by hydrothermal method by controlling different pH of solution.The molecular formula was determined by elemental composition analysis and single crystal X-ray diffraction:[Fe?Na?Hptp?2(As2Mo6O26)]?1?,[{Cu??pyr?2}6(As2Mo6O26)]·H2O?2?,?H2bipd?3[As2?As2VMo18O62]·3H2O?3?,?H2biyb?3(As2Mo18O62)?4?,?H4bib?2?H2bpy?2[(As2Mo18O62)]2·5H2O?5?,?Hbiz?3?biz?9[As3?(As2Mo18O62)2)]·2H2O?6?,{Na2?H2O?4[As2?(As 2VMo18O62)]}·H2O?7?,{Ag?trz?2}3[{Ag?trz?2}3(As2Mo18O62)]·H2O?8?,?ptp=4'-?3,5-pyrimidine?-2,2':6',2'-tripyridine;pyr=pyrazole;bipd=2,5-bis?1-imidazolv?pyridine;biyb=1,4-Bis?imidazol-l-ylmethyl?benze;bpy=4,4?-bipyridine;bib=1,4-Bis?1,2,4-triazol-1-yl?hexane;biz=benzimidazole;trz=1,2,4-triazole?Crystal structure analysis showed that compound 1 is a two-dimensional layered{As2Mo6}derivative extended from the unique trinuclear complex linking unit{FeNa2?Hptp?2},wherein the complex ligand ptp is 2,2'-bipyridine.And pyrimidine ligands formed by in-situ synthesis;compound 2 is formed by alternating{Cu?pyr?2}complex bridging units and{As2Mo6}polyacid clusters with new topologies{26·448·612}{2}6 2,12-linked three-dimensional open skeleton,which represents the highest connected{As2Mo6}-based organic-inorganic hybrid material;Compound 3 is a double protonated biped arsenic cap Dawson Supramolecular compound;Compound 4 is a supramolecular three-dimensional network extended by biprotonated biyb;Compound 5 is a Dawson-type supramolecular derivative of two different protonated organic ligand-modified tri-arsenic caps;Compound 6 is composed of three a protonated Hbiz organic ligand and nine protonated biz organic ligands and two zero-dimensional Dawson-type arsenate molybdates composed of two lattice waters;Compound 7 is a Dawson structural unit consisting of a symmetric bis-arsenic cap and four Two-dimensional Dawson structural unit composed of Na2?H2O?4 linking units;compound 8 is composed of A three-dimensional Dawson-type arsenic molybdate formed by the association of Ag and1,2,4-triazole.Compounds 1-8 all exhibit dual electrocatalysis,which can catalytically reduce inorganic nitrite?NO2-?and catalytically oxidize bio-organic molecule dopamine?DA?.It is a promising dual-function sensing material.Supercapacitor performance of compound 1-8 was studied for the first time,the experimental results show that{As2Mo6}type and{As2Mo18}type arsenic molybdateorganic-inorganichybridmaterialsasactivematerialof supercapacitor electrode showed good electrode activity,high specific capacitance and good cycle stability,which are development value and application prospect of super capacitor electrode materials.Compound 1-8 exhibited excellent activity for degradation of methylene blue?MB?and rhodamine B?RhB?dyes under ultraviolet light irradiation.Eight compounds degraded both MB and RhB by more than 90%.Among them,the catalytic effect of 3-D high-connected arsenomolybdate is far better than that of0-D similar compounds,which indicates that the implantation of organometallic ligands and the channel of structure facilitate electron transfer in the catalytic process. |
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