Vanadium Catalyst on Isostructural Transition Metal, Lanthanide, and Actinide Based Metal-Organic Frameworks for Alcohol Oxidation.
Xingjie WangXuan ZhangPeng LiKen-Ichi OtakeYuexing CuiJiafei LyuMatthew D KrzyaniakYuanyuan ZhangZhanyong LiJian LiuCassandra T BuruTimur IslamogluMichael R WasielewskiYufang WuOmar K FarhaPublished in: Journal of the American Chemical Society (2019)
The understanding of the catalyst-support interactions has been an important challenge in heterogeneous catalysis since the supports can play a vital role in controlling the properties of the active species and hence their catalytic performance. Herein, a series of isostructural mesoporous metal-organic frameworks (MOFs) based on transition metals, lanthanides, and actinides (Zr, Hf, Ce, Th) were investigated as supports for a vanadium catalyst. The vanadium species was coordinated to the oxo groups of the MOF node in a single-ion fashion, as determined by single-crystal X-ray diffraction, diffuse reflectance infrared Fourier transform spectroscopy, and diffuse reflectance UV-vis spectroscopy. The support effects of these isostructural MOFs were then probed using the aerobic oxidation of 4-methoxybenzyl alcohol as a model reaction. The turnover frequency was found to be correlated with the electronegativity and oxidation state of the metal cations on the supporting MOF nodes, highlighting an important consideration when designing catalyst supports.
Keyphrases
- metal organic framework
- high resolution
- transition metal
- hydrogen peroxide
- visible light
- electron transfer
- single molecule
- low grade
- solid state
- lymph node
- sentinel lymph node
- crystal structure
- nitric oxide
- magnetic resonance imaging
- heart failure
- computed tomography
- health risk
- early stage
- high intensity
- squamous cell carcinoma
- radiation therapy
- health risk assessment
- high grade
- neoadjuvant chemotherapy
- atrial fibrillation
- drinking water
- gold nanoparticles
- energy transfer
- dual energy
- locally advanced