ZnWO_4纳米微粒高效催化合成5-苯基-1H-四氮唑  

ZnWO_4 Nanoparticles as Catalyst for Synthesis of 5-Phenyl-1H-tetrazoles with High Activity

作　　者：宋继梅[1] 赵绍娟[1] 王勇[2] 胡海琴[1] 师亚利[1] 任明松[1] 

机构地区：[1]安徽大学化学化工学院,功能无机材料化学安徽省重点实验室,合肥230601 [2]中国科学技术大学化学系,合肥230026

出　　处：《无机化学学报》2013年第9期1813-1818,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21171002);安徽省自然科学基金(No.11040606M55);安徽省教育厅自然科学基金(No.KJ2010A015)资助项目

摘　　要：约10 nm大小的ZnWO4纳米微粒通过简单的溶剂热方法成功合成出来,将其应用于催化苯甲腈[3+2]环加成合成5-苯基-1H-四氮唑的反应。结果表明,0.2 mmol的ZnWO4纳米微粒110℃催化反应10 h,合成产物的产率达到81%;非晶态、纳米棒ZnWO4作为催化剂的产率分别为43%和65%。显然,催化剂用量少,反应时间短,反应条件温和,催化效率高。这或许归因于ZnWO4纳米微粒的小尺寸和高分散性,导致其比表面积大,活性位点多。ZnWO4纳米微粒表面的不饱和W原子与腈基作用,活化了腈基从而加速了反应的进行。ZnWO4 nanoparticles were synthesized by a facile solvothermal method. ZnWO4 nanoparticles were utilized as the catalyst for the formation of 5-phenyl-1H-tetrazoles from cyclo-addition reaction. The results show that the yield reaches 81% when 0.2 mmol catalyst is used at 110 ℃ for 10 h. However, the yield only reaches 43% and 65% for amorphous and nanorods ZnWO4, respectively. Clearly, ZnWO4 nanoparticles display superior catalytic performance. This high activity might be attributed to the larger surface area and more active sites that originate from the small size and good dispersibility of ZnWO4 nanoparticles. The unsaturated W atoms on the surface of ZnWO4 nanoparticles can activate the nitriles and enhance the reactivity for azides.

关 键 词：纳米微粒 ZnWO4 催化 5-苯基-1H-四氮唑 

分 类 号：O643.3[理学—物理化学] O614.241[理学—化学]