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锰/铁卟啉基纳米金属-有机框架催化烯烃环氧化

发表时间:2017-07-13  浏览量:74  下载量:17
全部作者: 常岚,姚希源,赵芳瑶,李悦
作者单位: 南开大学化学学院;南开大学先进能源材料化学教育部重点实验室
摘 要: 以5,10,15,20-四(4-羧基苯基)卟啉铁/锰为桥连配体、Zn2+为金属节点、4,4’-联吡啶(4,4’-bipyridine,bpy)为辅助配体,采用溶剂热法合成了两种分别含有锰卟啉和铁卟啉结构单元的金属-有机框架(metal-organic framework,MOF)催化剂(MOF-Mn和MOF-Fe)。这两种催化剂均具有纳米级的颗粒尺寸和均一的形貌。将两种催化剂用于催化一系列烯烃底物的环氧化反应,实验结果表明,两者在反应中均表现出较高的活性、选择性和稳定性。通过与游离金属卟啉配体的催化性能进行对比发现,在MOF-Mn和MOF-Fe中,bpy与中心金属的轴向配位对其高的催化选择性至关重要。
关 键 词: 物理化学;金属-有机框架;金属卟啉;纳米尺度;烯烃环氧化
Title: Nanoscale Mn/Fe porphyrin based metal-organic frameworks for the catalysis of alkene epoxidation
Author: CHANG Lan, YAO Xiyuan, ZHAO Fangyao, LI Yue
Organization: College of Chemistry, Nankai University; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University
Abstract: In this paper, Mn and Fe porphyrin based metal-organic framework (MOF) catalysts (MOF-Mn and MOF-Fe) were synthesized by the solvothermal reaction among MTCPPCl [M for Mn or Fe, H2TCPP=5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin], Zn2+ (used as metal node) and 4,4’-bipyridine (bpy, used as auxiliary ligand). Both of these catalysts present nanoscale particle sizes and homogeneous morphology. MOF-Mn and MOF-Fe could be used to promote the epoxidation of a series of alkene substrates, and exhibited good activity, selectivity and stability in reactions. By the comparison with the catalytic performance of free metalloporphyrin ligands, we assume that the axial coordination of 4,4’-bipyridine to the metal center of metalloporphyrin component is crucial to the high selectivity of MOF-Mn and MOF-Fe.
Key words: physical chemistry; metal-organic framework; metalloporphyrin; nanoscale; alkene epoxidation
发表期数: 2017年7月第13期
引用格式: 常岚,姚希源,赵芳瑶,等. 锰/铁卟啉基纳米金属-有机框架催化烯烃环氧化[J]. 中国科技论文在线精品论文,2017,10(13):1465-1472.
 
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