trans-stilbenes), a higher level of olefin conversion was attained using PW12/MIL-101. Moreover, confinement of PW12 within MIL-101 nanocages allowed us to reach higher epoxide selectivities at higher alkene conversions. The hybrid PWx/MIL-101 materials were stable to leaching, behaved as true heterogeneous catalysts, were easily recovered by filtration, and reused several times with the maintenance of the
聚氧
钨酸盐[PW 4 O 24 ] 3-(PW 4)和[PW 12 O 40 ] 3-(PW 12)已插入
金属有机骨架MIL-101的纳米笼中。已获得包含5-14 wt%的聚氧
钨酸盐的杂化材料PW x / MIL-101(x = 4或12),并通过元素分析,N 2吸附,FT-IR,拉曼和31 P NMR MAS光谱技术进行了表征。在温和的反应条件([H 2 O2 ] = 0.1-0.2 M,50°C,MeCN)。封入5 wt%的聚氧
钨酸盐的PW x / MIL-101在各种烯烃(3-烯,
柠檬烯,α-pine烯,
环己烯,环
辛烯,1-
辛烯)的环氧化,周转频率(TOF)和烯烃转化率接近均质PW x所达到的相应参数。对于具有芳族基团(
苯乙烯,顺式和反式-
苯乙烯基
苯甲酸酯)的底物的氧化,使用PW 12 / MIL-101可获得更高
水平的烯烃转化率。此外,将PW 12限制在MIL-101纳米笼中使我们