Extended architectures constructed of thiourea‐modified SBA‐15 nanoreactor: A versatile new support for the fabrication of palladium pre‐catalyst

Abstract

We designed and synthesized a novel catalyst consisting of ordered mesoporous silica (SBA‐15) functionalized with bis(thiourea) (BTU) linker. The regular and unique pore channels of BTU‐SBA‐15 ensure proper control of the size and homogeneous distribution of palladium nanoparticles. The physiochemical properties of the hybrid Pd@BTU‐SBA‐15 pre‐catalyst were investigated using various techniques. The proposed catalyst is found to be very active, reusable, stable and scalable, and has excellent reactivity and selectivity for Suzuki and Heck coupling reactions under very mild and sustainable reaction conditions.

Sulourea-coordinated Pd nanocubes for NIR-responsive photothermal/H2S therapy of cancer

“…KBr can induce the preferential growth of {100} crystal planes in Pd nanocubes, which was attributed to the selective and strong adsorption of Br – ions on Pd {100} crystal planes [ 31 ]. Then, Su was loaded into Pd nanocubes to synthesize the Pd-Su nanomedicine via the coordination of thione sulfur and amino nitrogen with the surface Pd atoms [ 32 – 34 ]. The transmission electron microscopy (TEM) and the scanning electron microscopy (SEM) images (Fig.…”

Single-pot tandem oxidative/C–H modification amidation process using ultrasmall PdNP-encapsulated porous organosilica nanotubes

“…Synthesis of SBA-15 using an aqueous solution of the Pluronic copolymer P123 (E21P67E21), 2 M HCl and tetraethyl orthosilicate (TEOS) was executed step-by-step according to our previous method. 42–54 Loading of Pd NPs in SBA-15 pore channels was performed according to the abovementioned method.…”

A novel strategy for stabilization of sub-nanometric Pd colloids on kryptofix functionalized MCM-41: nanoengineered material for Stille coupling transformation

“…In parallel, Shi and co-workers explored the synthesis of Pd colloids grafted mesoporous silica materials SBA-15 in Mizoroki–Heck reactions 25 . Moreover, the authors’ previous study 17 , 19 , 26 – 28 and other studies 29 – 37 have proven that colloidal Pd, Pd NPs, and Pd complex can greatly boost C–C bond formations.…”