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从缺位的keggin结构杂多阴离子出发,合成含过渡金属离子的三元杂多钨酸盐。由于其比二元的XW_(12)型杂多酸盐在氧上具有更大的表面负电荷密度,可能具有更好的催化性能,而得到广泛的研究。本文以α-、β-S_1W_9(即从Keggin结构的S_1W_(13)阴离子的不同的W_3O_(13)基团上分别失去三个W原子)和Cr(NO_3)_3.9H_2O为原料,合成出了八种未见文献报道的α-,β-S_1W_(10)Cr_2异构体的钾盐和有机铵盐。
Starting from the absence of heteropolyanions of keggin structure, ternary heteropolytungstates containing transition metal ions were synthesized. Due to its larger surface negative charge density on oxygen than the binary XW 12 type heteropolyacid salt, it may have better catalytic performance and has been widely studied. In this paper, three W atoms and one Cr (NO_3) _3.9H_2O have been lost from α-, β-S_1W_9 (ie, from different W_3O_ (13) groups in the S_1W_ (13) anion of Keggin structure) Eight kinds of potassium salts and organic ammonium salts of α-, β-S 1 W 10 Cr 2 isomers which have not been reported in the literature.