Sythese,Characterizations And Properties Of Arm-type Tungstophosp-Hate Estertinderivatives With Keggin Sandwich-type Structure

Using the sandwich-type tungstophosphate K₁₀[?M?₄?H₂O?₂(B-?-PW₉O₃₄)₂].nH₂O?M=Mn,Zn?as an inorganic precursor,and estertin?Cl₃SnCH₂CH₂COOCH₃ or Cl₃SnCH₂CH?CH₃?CO-OCH₃?as an organic precursor,three arm-type tungstophosphates with Keggin sandwich-ty-pe structure decorted by carboxytin/transition metal,namely Na₈K₂[Zn₂{Sn?CH₂?₂COO}₂-?B-?-PW9O34?2]·13H2O?PW₉-Zn-RSn?;K10[Mn2{Sn?CH2?2COO}2?B-?-PW9O34?2]·14H2O?PW₉-Mn-RSn?;Na3K7[Zn2{SnCH2CH?CH3?COO}2?B-?-PW9O34?2]·20H2O?PW₉-Zn-RSn-?CH₃??have successfully assembled in aquous solution by routine synthetic method.Single-crystal X-ray diffrations,NMR,IR,TG analysis,XRD and electrochemical analysis have been used to characterize compounds.Catalytic activity and the electrocatalytic activity towards the reduction of hydrogen peroxide have been also investigated.Moreover,preliminary study on the fluorescence properties.After compoundsloaded on TiO₂,the appearance of fluorescence quenching were clearly observed,the result shows that the compounds may be excellent candidates for photoactive materials.