[Show abstract][Hide abstract] ABSTRACT: A nanoscale aluminium-based metal organic framework (NMOF) with high thermal stability has been synthesized, which shows high H(2) and CO(2) uptake capacities and an excellent selectivity for CO(2) over N(2) and O(2).
Chemical Communications 12/2011; 48(5):759-61. DOI:10.1039/c1cc15106a · 6.72 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Spherical nitrogen-containing polymer and microporous carbon materials have been synthesized by using hexamethylenetetramine as nitrogen source and one of the carbon precursors under solvothermal conditions, without using any surfactant or toxic reagent such as formaldehyde. The synthesis strategy is user-friendly, cost-effective, and can be easily scaled up for production. The microporous carbon spheres exhibit high surface areas of 528–936 m2 g−1 with a micropore size of 0.6–1.3 nm. The synthesized microporous carbons show a good capacity to store CO2, which is mainly due to the presence of nitrogen-containing groups and a large amount of narrow micropores (<1.0 nm). At 1 atm, the equilibrium CO2 capture capacities of the obtained microporous carbons are in the range of 3.9–5.6 mmol g−1 at 0 °C and 2.7–4.0 mmol g−1 at 25 °C.
[Show abstract][Hide abstract] ABSTRACT: The encapsulation of functional species on magnetic core is a facile approach for the synthesis of core-shell magnetic materials, surface encapsulating matrices play crucial roles in regulating their properties and applications. In this work, two core-shell palladium N-heterocyclic carbene (NHC) particles (Fe3O4@PNP1 and Fe3O4@PNP2) were prepared by one-pot reaction of semi-rigid tripodal imidazolium salts and palladium acetate in the presence of magnetite nanoparticles. The magnetite nanoparticles are encapsulated inside main-chain palladium NHC matrices as the core. The conjugated effects of triphenyltriazine and triphenylbenzene in the imidazolium salts have important effects on their physical properties and catalytic performances. Fe3O4@PNP2 shows better recyclability than Fe3O4@PNP1. Unexpectedly, Pd(II) is well maintained after six consecutive catalytic runs in Fe3O4@PNP2, while Pd(0) and Pd(II) coexist in Fe3O4@PNP1 under the same conditions, the morphologies of these spherical core-shell particles have no significant variation after six consecutive catalytic runs
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