Evaluation of Heterogeneous Metal−Organic Framework Organocatalysts Prepared by Postsynthetic Modification
作者:Sergio J. Garibay、Zhenqiang Wang、Seth M. Cohen
DOI:10.1021/ic1011549
日期:2010.9.6
a building block is shown to undergo chemical modification with a set of cyclic anhydrides. The modification of the aluminum-based MOF known as MIL-53(Al)-NH2 (MIL = Matérial Institut Lavoisier) by these reagents is demonstrated by using a variety of methods, including NMR and electrospray ionizationmassspectrometry (ESI-MS), and the structural integrity of the modified MOFs has been confirmed by
Facile mechanochemical synthesis of MIL-53 and its isoreticular analogues with a glance at reaction reversibility
作者:Fillipp Edvard Salvador、Zhuorigebatu Tegudeer、Halie Locke、Wen-Yang Gao
DOI:10.1039/d4dt00372a
日期:——
MIL-53 represents one of the most notable metal–organic frameworks given its unique structural flexibility and remarkable thermal stability. In this study, a shaker-type ball milling method has been developed into a facile and generalizable synthetic strategy to access a family of MIL-53 type materials under ambient conditions. During the explorations of [M(OH)(fumarate)] (M = Al, Ga, and In), we report
Palladium nanoparticles embedded in MOF matrices: Catalytic activity and structural stability in iodobenzene methoxycarbonylation
作者:Vera I. Isaeva、Oleg L. Eliseev、Vladimir V. Chernyshev、Tatyana N. Bondarenko、Vadim V. Vergun、Gennady I. Kapustin、Albert L. Lapidus、Leonid M. Kustov
DOI:10.1016/j.poly.2018.10.065
日期:2019.1
This paper reports for the first time iodobenzene methoxycarbonylation over Pd-containing catalysts based on MOF materials differed in topology, texture properties and organic and inorganic building blocks: MIL-53(Al) (AlOHbdc, bdc = benzene-1,4-dicarboxylate), NH2-MIL-53(Al) (AlOHabdc, abdc=2-aminobenzene-1,4-dicarboxylate), NH2-MIL-101(Al) (Al(3)Oabdc)(3), and ZIF-8 (Zn(Melm)(2). Melm = 2-methylimidazolate). Low-loaded nanocatalysts (0.1-0.5 wt.% Pd) based on MIL-53(Al) and ZIF-8 demonstrated a superior activity as compared to those on conventional supports such as silica and alumina. The catalytic performance of the synthesized nanocatalysts is affected both by the MOF support nature and Pd loading. Another important factor governing the performance of the Pd/MOF catalysts is the preparation procedure of the metal-organic matrices which affects their crystal size and morphology. This effect was studied for ZIF-8 materials. (C) 2018 Published by Elsevier Ltd.
Amino-functionalized Al-MIL-53 for dimethoate pesticide removal from wastewater and their intermolecular interactions
作者:Reda M. Abdelhameed、Mohamed Taha、Hassan Abdel-Gawad、Bahira Hegazi
DOI:10.1016/j.molliq.2020.114852
日期:2021.4
Small-angle X-ray scattering documents the growth of metal-organic frameworks
作者:Maarten G. Goesten、Eli Stavitski、Jana Juan-Alcañiz、Alberto Martiñez-Joaristi、Andrei V. Petukhov、Freek Kapteijn、Jorge Gascon
DOI:10.1016/j.cattod.2012.08.044
日期:2013.4
We present a combined in situ small-and wide-angle scattering (SAXS/WAXS) study on the crystallization of two topical metal-organic frameworks synthesized from similar metal and organic precursors: NH2-MIL-53(Al) and NH2-MIL-101(Al). A thorough analysis of SAXS data reveals the most important phenomena occurring during crystallization and unravels the effect of the solvent. NH2-MIL-53(Al) growth follows two routes: (i) through direct hydrolysis of AlCl3 center dot 6H(2)O in water, and (ii) via the intermediate NH2-MOF-235(Al), which forms in pure DMF or DMF/H2O mixtures. In the case of pure H2O as solvent, formation of NH2-MIL-53(Al) crystals proceeds through steady growth in all three dimensions. The addition of DMF to the synthesis mixture results in amorphous scattering entities forming very rapidly and subsequently arranging into the intermediate phase, NH2-MOF-235(Al). In DMF/H2O mixtures, amorphous precursors develop in rapid fashion with fractal character dominating, followed by densification, crystallization of NH2-MOF-235(Al) and slow transformation into NH2-MIL-53(Al). Formation of NH2-MIL-101(Al) only occurs when pure DMF is used as solvent, and it always proceeds through the formation of the intermediate NH2-MOF-235(Al). In this case a smooth scatterer surface is observed, with morphology and size constant in time. (C) 2012 Elsevier B.V. All rights reserved.