Cage-like mesoporous organosilicas with isocyanurate bridging groups synthesized by soft templating with poly(ethylene oxide)–poly(butylene oxide)–poly(ethylene oxide) block copolymer

Tunable‐Sized Polymeric Micelles and Their Assembly for the Preparation of Large Mesoporous Platinum Nanoparticles

“…By virtue of their large pore size, these structures have ahigh surface area that is accessible to reagents. [8] If these micelle templates could be applied to the preparation of noble metals,i np articular, materials such as platinum, these ultralarge accessible surfaces would be of great utility for electrocatalysis.Mesoporous noble-metal materials (e.g.,A u, Pt, Pd) have most of the physical and chemical properties that make these metals good catalysts.C onsequently,t hese structures exhibit enhanced catalytic properties for ar ange of reactions, including small-organic-molecule oxidation, the oxygen reduction reaction, and hydrogenation. [1] Both pore size and the porous structure of the materials can be controlled by tuning the inter-a nd intramolecular forces that drive the self-assembly of surfactants and block copolymers.…”

“…[1] Both pore size and the porous structure of the materials can be controlled by tuning the inter-a nd intramolecular forces that drive the self-assembly of surfactants and block copolymers. [8] If these micelle templates could be applied to the preparation of noble metals,i np articular, materials such as platinum, these ultralarge accessible surfaces would be of great utility for electrocatalysis. [3] Forexample,Zhao and co-workers reported that three-dimensional (3D) ordered mesoporous silica with ultralarge accessible mesopores can be synthesized on highmolecular-weight block-copolymer templates.T hey used solvent evaporation to make composite micelles composed of ab lock copolymer and as ilica precursor to assemble the ordered mesostructure.…”

“…[3] Forexample,Zhao and co-workers reported that three-dimensional (3D) ordered mesoporous silica with ultralarge accessible mesopores can be synthesized on highmolecular-weight block-copolymer templates.T hey used solvent evaporation to make composite micelles composed of ab lock copolymer and as ilica precursor to assemble the ordered mesostructure. [8] If these micelle templates could be applied to the preparation of noble metals,i np articular, materials such as platinum, these ultralarge accessible surfaces would be of great utility for electrocatalysis. [8] If these micelle templates could be applied to the preparation of noble metals,i np articular, materials such as platinum, these ultralarge accessible surfaces would be of great utility for electrocatalysis.…”

Periodic Mesoporous Organosilicas: from simple to complex bridges; a comprehensive overview of functions, morphologies and applications

“…160 Like cyclam units, isocyanurate rings are well known for their binding ability to transition metals. Jaroniec et al 161,162 achieved the first ICS-PMO with a cubic mesostructure (Im % 3m symmetry). Attempts to prepare bifunctional PMO materials containing isocyanurate and mercaptopropyl groups were reported by Fischer et al, 163 Jaroniec et al 164,165 and Kim et al 166 The presence in the same material of two different functional groups with metal-chelating properties could have enormous advantages for selective adsorption.…”

Tunable‐Sized Polymeric Micelles and Their Assembly for the Preparation of Large Mesoporous Platinum Nanoparticles

“…[4] Although the synthesis of these large-pore materials have been demonstrated, their compositions are still limited to carbon, [5] silica, [4,6] metal oxides, [7] and organosilicates. [8] If these micelle templates could be applied to the preparation of noble metals,i np articular, materials such as platinum, these ultralarge accessible surfaces would be of great utility for electrocatalysis.Mesoporous noble-metal materials (e.g.,A u, Pt, Pd) have most of the physical and chemical properties that make these metals good catalysts.C onsequently,t hese structures exhibit enhanced catalytic properties for ar ange of reactions, including small-organic-molecule oxidation, the oxygen reduction reaction, and hydrogenation. [9] Our previous studies demonstrated that mesostructured noble metals with large pores could be synthesized by using pore-directing agents, such as the block copolymer polystyrene-block-poly(ethylene oxide) (PS-b-PEO), through electrochemical deposition.…”