A new Ce^(3+)modified Dawson-like polyoxometalate cluster(C_(2)H_(8)N)_(12)Na_(2)[H_(10){Ce(H_(2)O)_(5)}_(2)(Te_(2)W_(37)O_(132))]·^(39)H_(2)O was synthesized using pH and temperature-controlled one-pot strategy....A new Ce^(3+)modified Dawson-like polyoxometalate cluster(C_(2)H_(8)N)_(12)Na_(2)[H_(10){Ce(H_(2)O)_(5)}_(2)(Te_(2)W_(37)O_(132))]·^(39)H_(2)O was synthesized using pH and temperature-controlled one-pot strategy.The compound was characterized by single-crystal X-ray structure analysis,IR spectroscopy,thermogravimetric(TG)analysis,X-ray photoelectron spectroscopy(XPS),and electrospray ionization mass spectrometry(ESI-MS).Singlecrystal X-ray structure analysis revealed that there was a new{Te_(2)W_(37)O_(132)}structure and two Ce^(3+)in this compound.Moreover,it is notable that this compound presents excellent Lewis acid-and Lewis base activities in the condensation cyclization of 1,3-diketones with hydrazines/hydrazides or diamines.All the desired products were obtained in moderate to good yields(up to 99%)and with a high turnover number(up to 4347).展开更多
基金Natural Science Foundation of China(21501010,21231002,21671019)the 111 Project(B07012)for financial support.
文摘A new Ce^(3+)modified Dawson-like polyoxometalate cluster(C_(2)H_(8)N)_(12)Na_(2)[H_(10){Ce(H_(2)O)_(5)}_(2)(Te_(2)W_(37)O_(132))]·^(39)H_(2)O was synthesized using pH and temperature-controlled one-pot strategy.The compound was characterized by single-crystal X-ray structure analysis,IR spectroscopy,thermogravimetric(TG)analysis,X-ray photoelectron spectroscopy(XPS),and electrospray ionization mass spectrometry(ESI-MS).Singlecrystal X-ray structure analysis revealed that there was a new{Te_(2)W_(37)O_(132)}structure and two Ce^(3+)in this compound.Moreover,it is notable that this compound presents excellent Lewis acid-and Lewis base activities in the condensation cyclization of 1,3-diketones with hydrazines/hydrazides or diamines.All the desired products were obtained in moderate to good yields(up to 99%)and with a high turnover number(up to 4347).
