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自从Dawson首次利用X-射线衍射法测定了K6[P2W18O62]·14H2O的结构以来,有关Dawson型杂多化合物的研究已有许多报道．研究表明,Dawson型杂多化合物具有活性高,选择性好等优点,有关以Se作杂原子的硒钨钒三元杂多配合物仅仅见于H8[SeW8V4O40],H9[SeW7V5O40], H6[SeW10V2O40],H7(SeW9V3O40]．前3种杂多配合物均只在溶液中通过光度法测定了其组成,未能得到固体,也未能确定结构．H7[SeW9V3O40]得到了无定形固体．本文合成了Dawson型硒钨钒杂多配合物,并对其结构进行了表征．
Since Dawson’s first determination of the structure of K6 [P2W18O62] · 14H2O by X-ray diffraction, there have been many reports on Dawson-type heteropoly compounds. The results show that Dawson-type heteropoly compounds have the advantages of high activity and good selectivity. Selenium-tungsten-vanadium ternary heteropoly complexes containing heteroatoms as Se atoms are only found in H8 [SeW8V4O40], H9 [SeW7V5O40], H6 [SeW10V2O40] , H7 (SeW9V3O40] .The first three kinds of heteropoly complexes were only in solution by spectrophotometry to determine the composition, failed to get a solid, also failed to determine the structure.H7 [SeW9V3O40] obtained an amorphous solid. Dawson selenotungstovanadophosphoric complex, and its structure was characterized.