A metal–organic framework immobilised iridium pincer complex

Abstract

An iridium pincer complex has been immobilised in the metal–organic framework NU-1000. The stable Ir-pincer modified NU-1000 is catalytically active in the hydrogenation of alkenes in condensed phase and under flow conditions.

Spatially isolated palladium in porous organic polymers by direct knitting for versatile organic transformations

“…It should be emphasized that unlike phosphine-coordinated homogeneous organometallic catalysts that are commonly unstable in air, no observable change in the morphology or the catalytic efficiency of the PPPd was found after exposure to air for several months. The enhancement of catalyst's stability is also observed in other porous material supported initially low-stable catalyst systems [31,32], most likely benefited from the spatial isolation effect of the framework by inhibiting aggregation.…”

Elucidating Charge Separation Dynamics in a Hybrid Metal–Organic Framework Photocatalyst for Light-Driven H2 Evolution

“…(16)(17)(18)(19)(20)(21)(22)(23) The versatility of these components not only offers the capability to tune their cavity but also allows incorporation of molecular functional units into its heterogeneous crystal matrix, opening up the possibility to address the stability issues and allow high resolution studies of the incorporated catalytic active sites using a suite of physical characterization methods. (24)(25)(26)(27)(28)(29)(30)(31) Due to these reasons, recent efforts on MOF photocatalysis have extended to incorporate molecular photosensitizers or/and catalysts into MOFs structure. While a large number of functionalized MOF systems with either molecular photosensitizers (PSs) or catalysts incorporated into the framework have been reported recently toward versatile applications, (24)(25)(26)(27)(32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45)(46)(47)(48)(49) there are only two examples that integrate both PS and catalysts for photocatalytic H2 generation.…”

“…(24)(25)(26)(27)(28)(29)(30)(31) Due to these reasons, recent efforts on MOF photocatalysis have extended to incorporate molecular photosensitizers or/and catalysts into MOFs structure. While a large number of functionalized MOF systems with either molecular photosensitizers (PSs) or catalysts incorporated into the framework have been reported recently toward versatile applications, (24)(25)(26)(27)(32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45)(46)(47)(48)(49) there are only two examples that integrate both PS and catalysts for photocatalytic H2 generation. One example includes the incorporation of [Ru(dcbpy)(bpy)2] 2+ (dcbpy = 2,2′-bipyridyl-5,5′-dicarboxylic acid) and Pt(dcbpy)Cl2 complex to the MOFs scaffold (UIO-67), which can serve as PSs and catalysts, respectively, for photocatalytic H2 generation from water.…”

Poison or Promoter? Investigating the Dual-Role of Carbon Monoxide in Pincer-Iridium-Based Alkane Dehydrogenation Systems via Operando Diffuse Reflectance Infrared Fourier Transform Spectroscopy

“…However, without an appropriate backbone tether, supporting these species on metal oxides such as alumina or silica results in the generation of a grafted iridium(III) center via oxidative addition of surface silanol groups. [44][45][46][47][48] While these complexes were found to be highly active for olefin hydrogenation, apart from a few exceptions in the literature, [39][40] the aforementioned pincer-ligated alkane dehydrogenation systems are based on Ir(I). In order to work around this propensity for interaction with the surface, numerous efforts focusing on tethering pincer-metal complexes to surfaces via backbone modifications have been attempted.…”