Gas-phase organometallic catalysis in MFM-300(Sc) provided by switchable dynamic metal sites

Abstract

MFM-300(Sc) was explored as a catalyst for the gas-phase hydrogenation of acetone. The catalysis results support the presence of non-permanent open Sc(III) sites within the structure due to the requirement...

Lewis Acid‐Catalyzed Ring‐Opening Alcoholysis of Cyclohexene Oxide: The Role of Open Metal Sites in the Bi(III)‐based Metal‐Organic Framework SU‐101

“…[18] MOF materials have been applied for gas and liquid phase reaction catalysts with high conversion and successful selectivity. [19,20] One of the most promising candidates to catalyze chemical reactions in MOFs is open-metal sites (OMS). OMS is described as vacant Lewis acid sites (electrons acceptor) on the metal ions, generated by water/solvent de-coordination after an activation process (vacuum/temperature).…”

“…Selected MOFs have been used as catalysts for several reactions exhibiting different kinds of active sites, [13] such as single atoms, [14] defect sites, [15] metal clusters, [16] functional groups, [17] and, recently, semi‐open metal sites [18] . MOF materials have been applied for gas and liquid phase reaction catalysts with high conversion and successful selectivity [19,20] . One of the most promising candidates to catalyze chemical reactions in MOFs is open‐metal sites (OMS).…”

“…Highlighting its well‐defined open Bi +3 sites (Figure 1), which can act as Lewis acid centers for different catalytic applications [27] . The role of OMS within this MOF material was demonstrated in the transformation of H 2 S into polysulfides [28] . Additionally, SU‐101 was applied for transfer hydrogenation, [29] CO 2 adsorption, [30] and pollutants adsorption [31] .…”

MOF-based catalysts: insights into the chemical transformation of greenhouse and toxic gases

“…Several improved properties have arisen from switching the organic linker or metal ions to functionalization and pre- and post-synthetic modifications. 28 These functionalized materials possess excellent catalytic sites for unlimited reaction systems, 29 of which have enabled them to perform reactions in gas-phase, 30 liquid-phase, 31 and liquid-gas phase systems. 32 In brief, single atoms, 33 defects, 34 metal clusters, 35 functional groups, 36 and dynamic sites 37 are the main catalytic sites in MOF catalyst materials.…”

“…Furthermore, the straightforward product separation from the catalyst in heterogenous systems makes this process more attractive. 12,13 A wide range of different heterogenous catalysts have been investigated for specific reactions. The most representative is zeolites: structurally arranged aluminosilicate based on a tetrahedron geometry.…”