CAJ | 학술논문

采用浸渍法制备了 Au/MOF-5催化剂，用 X 射线衍射（XRD）、N2物理吸附、红外光谱（IR）、热重分析（TG-DTA）、电感耦合等离子体原子发射光谱（ICP-AES）和透射电镜（TEM）对催化剂进行表征，并探索其在醛、炔和胺三组分（A3）偶联反应中的催化性能。实验结果表明：Au/MOF-5对醛、炔和胺三组分偶联反应具有较好的催化活性，而且对产物炔丙基胺的选择性为100%。Au/MOF-5对反应底物具有较宽的适用范围，对于芳香醛和脂肪醛、二级胺和N-烷基取代苯胺、芳香炔和脂肪炔均具有较好的催化活性，而且对于吸电子芳香醛的催化活性大于供电子芳香醛。Au/MOF-5可以循环使用至少3次，催化活性变化不大。
채용침지법제비료 Au/MOF-5최화제，용 X 사선연사（XRD）、N2물리흡부、홍외광보（IR）、열중분석（TG-DTA）、전감우합등리자체원자발사광보（ICP-AES）화투사전경（TEM）대최화제진행표정，병탐색기재철、결화알삼조분（A3）우련반응중적최화성능。실험결과표명：Au/MOF-5대철、결화알삼조분우련반응구유교호적최화활성，이차대산물결병기알적선택성위100%。Au/MOF-5대반응저물구유교관적괄용범위，대우방향철화지방철、이급알화N-완기취대분알、방향결화지방결균구유교호적최화활성，이차대우흡전자방향철적최화활성대우공전자방향철。Au/MOF-5가이순배사용지소3차，최화활성변화불대。
Gold was supported on a functionalized MOF-5 by impregnation method. The catalyst Au/MOF-5 was characterized by powder X-ray diffraction (XRD), N2 adsorption-desorption, infrared spectra (IR), thermogravimetric analysis and differential thermal analyses (TG-DTA), transmission electro microscopy (TEM), and inductivity coupled plasma (ICP). Its catalytic performance was examined in one-pot synthesis of structurally divergent propargylaminesvia three component coupling of aldehyde, alkyne, and amine (A3) in 1,4-dioxane. The results showed that the Au/MOF-5 catalyst displayed high activity (high aldehyde consumption rate and turn-over number at 120℃: 18.7 mmol·(g Au)?1·h?1and 14.7, based on total gold content) and 100% selectivity for propargylamines. Various aromatic and aliphatic aldehydes were also able to undergo the A3 coupling on the catalyst Au/MOF-5. It was also found that the conversion of benzaldehyde was higher on the catalyst for aryl aldehydes with electron-withdrawing group bonded on benzene ring than for those with an electron-donating group. There was good conversion of benzaldehyde for secondary amines andN-alkyl aniline such as piperidine, pyrrolidine, morpholine, diethylamine, andN-methylaniline. It was also found that the conversion of benzaldehyde decreased with increasing chain length of straight-chain alkyl substituted phenylacetylene. Au/MOF-5 catalyst could be recycled at least three times, and the activity only decreased slightly.