The title bis(imidazol-4-yl)porphyrin 1 gave supramolecular assemblies through hydrogen bonding; efficient excited energy transfer followed by electron transfer to quenchers has been observed in toluene.

Amphiphilic bis(imidazolyl)tris(porphyrinatozinc) complexes having omega-carboxyalkyl meso substituents were prepared. The barrel-type porphyrin macroring organized through their complementary coordination was incorporated into a liposomal bilayer membrane with orientation normal to the surface. Under the conditions concentrated in the membrane, introduction of a fullerotripyridyl ligand into the cavity of the macroring quenched fluorescence not only from the host ring itself but also from other surrounding macrorings. Energy transfer among antenna macrorings in the membrane mimics the assembly of a bacterial light-harvesting antenna system.

Large supramolecular assemblies of 5,15-bis(imidazol-4-yl)porphinatogallium 2Ga have been synthesized by hexacoordination of two imidazolyl groups to Ga(III) in a staircase arrangement of porphyrin planes as each '' step ''. The structure of the supramolecular assembly was characterized by UV, X-ray diffraction, and AFM. The conductivity of 2Ga films was enhanced 8 times by photoirradiation.

Mono‐ (Cu or Au) and bi‐metallic AuCu nanoparticles were prepared by a modified polyol reduction method and deposited onto Al2O3 followed by calcination at 500 °C in air. The synthesised catalysts were tested for their activity for NO reduction with CO in excess H2O between 50 and 500 °C at a contact time relevant for automotive convertors. The bi‐metallic catalysts showed a significantly higher activity than Cu/Al2O3 and Au/Al2O3, and the latter was inert for the target reaction. In addition, the activity depended greatly on the Au/Cu ratio, which thus demonstrates a synergy effect between these two metals. Operando UV/Vis spectroscopy provided direct evidence for the transformation of initially oxidised CuOx species into metallic Cu0, which is the only active species for NO reduction. Promotion with Au was found to accelerate the reduction of Cu2+/Cu+ to Cu0.

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