一例多钒酸盐杂化材料的制备及高效催化烯烃环氧化  

Preparation and efficient catalysis for olefins epoxidation of a polyoxovanadate⁃based hybrid

作　　者：李宁 杜思宇 王雪怡 杨辉 周涛 关致敏 费鹏 马宏芳[1] 蒋尚 LI Ning;DU Siyu;WANG Xueyi;YANG Hui;ZHOU Tao;GUAN Zhimin;FEI Peng;MA Hongfang;JIANG Shang(School of Chemistry and Chemical Engineering,Shanxi Datong University,Datong,Shanxi 037009,China)

机构地区：[1]山西大同大学化学与化工学院,大同037009

出　　处：《无机化学学报》2024年第4期799-808,共10页Chinese Journal of Inorganic Chemistry

基　　金：山西省应用基础项目(No.202203021222296);山西省高等学校科技创新项目(No.2023L254,2022L425);大同市重点研发计划项目(No.2023003);山西大同大学校级项目(No.2017-B-04,2019-B-11,2022Q24)资助。

摘　　要：以2-(2-吡啶基)咪唑(pIM)、Co^(2+)和NaVO_(3)为原料,在水热条件下,制备了新的钒氧簇化合物[Co(pIM)V_(2)O_(6)](1)。采用X射线单晶衍射、粉末X射线衍射、傅里叶变换红外光谱和元素分析等方法对化合物进行了表征。单晶解析表明,该化合物由VO_(4)四面体和CoO_(3)N_(2)四方锥通过氧原子共边、共角连接成二维结构。基于钒氧簇在催化氧化体系中的高效活性,1作为非均相反应的催化剂,在以H_(2)O_(2)为氧化剂的催化烯烃环氧化反应中表现出优秀的催化性能,催化剂能够多次重复使用且活性基本保持不变。此外,磁化率研究表明1中存在反铁磁相互作用。A new polyoxovanadate compound[Co(pIM)V_(2)O_(6)](1)was hydrothermally synthesized,where pIM stands for 2-(2-pyridyl)imidazole.For its characterizations,an integration of X-ray single crystal diffraction,powder X-ray diffraction,Fourier transform infrared spectra,and elemental analysis was accomplished.The compound exhibited a 2D architecture composed of VO_(4) tetrahedra and CoO_(3)N_(2) square pyramids via both edge-and corner-sharing.Considering the excellent catalytic oxidation features of polyoxovanadate,compound 1 was used as an efficient heterogeneous catalyst for the epoxidation of olefins with H_(2)O_(2) as an oxidant,and could be reused without consuming activity.Besides,the magnetic studies indicated the antiferromagnetic interactions in 1.CCDC:2285966.

关 键 词：多钒酸盐 非均相催化剂 烯烃环氧化 磁性 

分 类 号：O614.511[理学—无机化学]