N-羟基邻苯二甲酰亚胺与8-羟基喹啉氧钒(IV)配合物协同催化分子氧氧化乙苯(英文)  

Aerobic Oxidation of Ethylbenzene Co-catalyzed by N-Hydroxyphthalimide and Oxobis(8-Quinolinolato) Vanadium (IV) Complexes

作　　者：秦金伟 伏再辉[1] 刘亚纯[1] 何乡陵[1] 张德喜[1] 吴文锋[1] 王彦龙 龚兴浪 邓晓林[1] 武海涛 邹艳红 喻宁亚[1] 尹笃林[1] 

机构地区：[1]湖南师范大学化学化工学院湖南省资源精细化与先进材料重点实验室化学生物学和中药分析教育部重点实验室,湖南长沙410081

出　　处：《催化学报》2011年第8期1342-1348,共7页

基　　金：supported by the National Natural Science Foundation of China(20873040,20573035);the Natural Science Foundation of Hunan Province(10JJ2007)~~

摘　　要：研究了钒化合物对N-羟基邻苯二甲酰亚胺(NHPI)催化分子氧氧化乙苯反应中的调变效应.结果表明,由8-羟基喹啉及其衍生物与乙酰丙酮氧钒(IV)配位制得的8-羟基喹啉氧钒(IV)配合物的催化活性比乙酰丙酮氧钒(IV),NH4VO3和V2O5的高.在优化的反应条件下,乙苯转化率和苯乙酮选择性可分别达60%～69%和97%.基于液体反应的紫外光谱,推测钒催化剂能够促进NHPI转变为N-氧基邻苯二甲酰亚胺自由基和1-苯基过氧化氢转变为苯乙酮.The mediation effect of vanadium compounds on the N-hydroxyphthalimide （NHPI）-catalyzed aerobic oxidation of ethylbenzene （EB） was investigated at 90 °C in benzonitrile. Among the vanadium mediators examined, a series of oxobis（8-quinolinolato） vanadium （IV） complexes （VIVOQ2）, which were prepared by the coordination of 8-hydroxyquinoline or its derivatives with oxobis（2,4-pentanedionate） vanadium （IV） （VIV O（acac）2） showed a better mediation effect than VIVO（acac）2, NH4VO3, and V2O5 and they gave about 60%–69% EB conversion and 97% of acetophenone （AcPO） selectivity under optimum reaction conditions. This is due to the dual catalysis effects of these V mediators on the transformation of NHPI to the phthalimide-N-oxyl （PINO） radical and the decomposition of 1-phenylethyl hydroperoxide to AcPO, as supported by UV-Vis spectral characterization.

关 键 词：N-羟基邻苯二甲酰亚胺 8-羟基喹啉氧钒(IV) 需氧氧化 乙苯 苯乙酮 

分 类 号：O643.32[理学—物理化学]