Supercritical CO Synthesis of Porous Metalloporphyrin Frameworks: Application in Photodynamic Therapy.

A series of porous metalloporphyrin frameworks prepared from the 5,10,15,20-tetra(4-pyridyl)porphyrin (HTPyP) linker and four metal complexes, M(hfac) M = Cu(II), Zn(II), Co(II), and Ni(II) (hfac: 1,1,1,5,5,5-hexafluoroacetylacetonate), were obtained using supercritical CO (scCO) as a solvent. All the materials, named generically as [M-TPyP] , formed porous metal-organic frameworks (MOFs), with surface areas of ∼450 m g. All MOFs were formed through the coordination of the metal to the exocyclic pyridine moieties in the porphyrin linker.

Photocatalytic Hydrogen Production using Porous 3D Graphene-Based Aerogels Supporting Pt/TiO Nanoparticles.

Composites involving reduced graphene oxide (rGO) aerogels supporting Pt/TiO nanoparticles were fabricated using a one-pot supercritical CO gelling and drying method, followed by mild reduction under a N atmosphere. Electron microscopy images and N adsorption/desorption isotherms indicate the formation of 3D monolithic aerogels with a meso/macroporous morphology. A comprehensive evaluation of the synthesized photocatalyst was carried out with a focus on the target application: the photocatalytic production of H from methanol in aqueous media.