A ring-shaped 12-Ti-substituted poly(polyoxometalate): synthesis, structure, and catalytic properties
作者:Hai-Lou Li、Chen Lian、Guo-Yu Yang
DOI:10.1007/s11426-022-1215-1
日期:2022.5
A new ring-shaped 12-Ti-substituted poly(polyoxometalate) (poly(POM)), K10H15[K2Na(H2O)3}@(Ti2O)2(Ti4O4)2(A-α-1,3,5-GeW9O36)2(A-α-2,3,4-GeW9O36)2}]·45H2O (1), has been made under hydrothermal conditions, showing the highest number of Ti centers in Keggin-type poly(POM) family to date. Its obvious feature is that two types of novel chiral trivacant [GeW9O36]14−(A-α-1,3,5-GeW9O36 and A-α-2,3,4-GeW9O36)
一种新型环状12-Ti取代的聚(多金属氧酸盐)(poly(POM)),K 10 H 15 [K 2 Na(H 2 O) 3 }@(Ti 2 O) 2 (Ti 4 O 4 ) 2 ( A - α -1,3,5-GeW 9 O 36 ) 2 ( A - α -2,3,4-GeW 9 O 36 ) 2 }]·45H 2 O ( 1),已在水热条件下制备,显示迄今为止 Keggin 型聚 (POM) 家族中 Ti 中心数量最多。其明显的特点是两种新型手性三空位[GeW 9 O 36 ] 14− ( A - α -1,3,5-GeW 9 O 36和A - α -2,3,4-GeW 9 O 36 )链段最早是在 POM 化学中发现的,四个[GeW 9 O 36 ] 14链段由两个 Ti 2 O 和两个 Ti 4 O 4交替连接核形成环形聚(POM),其中在POM中首次观察到两种类型的连接模式Ti 2