Christian Panz

LMU-3: a new cobalt aluminophosphate with exclusively five-coordinated aluminium and octahedrally coordinated cobalt

Abstract A new cobalt aluminophosphate, named LMU-3, has been synthesized from a synthesis mixture containing the 1,1′-dimethylcobalticinium complex cation as a cobalt source. Although the yield of the compound is very low, single crystals can be obtained and a crystal structure analysis has been carried out. The structure of LMU-3 is related to that of a nickel aluminophosphate with the formula K[Ni(H2O)2Al2(PO4)3]. It possesses an open framework built up from distorted [CoO6] octahedra, [AlO5] trigonal byramids and [PO4] tetrahedra. The still somewhat tentative formula for LMU-3 is NH4Co(H2O)2Al2P3O12]. It crystallizes in the monoclinic space group C2/c (No. 15) with a = 13.110(2), b = 10.163(15), c = 8.7424(14) A , β = 108.830(13)°, V = 1102.8 A 3 and Z = 4 . The small amounts of LMU-3 available hamper further characterization.

Structure-directed materials syntheses : Metal complexes as structure-directing agents for zeolite-type solids

Abstract Metal complexes have been discovered as a novel class of structure-directing agents for the synthesis of porosils, i.e. zeolite-type solids with a pure silica framework. A survey is given about the different preparation methods used and the silica-metal complex host-guest compounds that have been synthesized so far. Special attention is given to differences between cobalticinium nonasil compounds that have been synthesized in basic or fluoride media.