Inorganic layered structures in hybrid double sulfates: related phases and thermal reactivity

摘要: The use of benzimidazole as an aromatic diamine template in the synthesis a series hybrid double sulfate salts containing transition metals provided new structure topology that gathers between supramolecular aspect and lamellar aspect, which is not very much encountered literature. obtained materials with general formula (C7H7N2)2[MII(H2O)6](SO4)2·4H2O (MII = Zn, Cu, Ni, Co) (C7H7N2)2[Fe(H2O)6](SO4)2·3H2O crystallize according to triclinic symmetry (S.G. P) monoclinic P21/n), respectively. mineral layer built from (SO4), hexaaquametal-complex[MII(H2O)6] free H2O molecules, linked together by hydrogen bonds only. amines are intercalated inorganic layers form chains through π⋯π interactions. orientation amine molecule two different directions can modify interlayer space, able vary 12.3 13.2 A depending upon on nature metal. thermal behaviour five metal compounds, studied TDXD TG, shows good stability precursors indicates dehydration proceeds differently incorporated into leading formation crystalline phases during heating. In particular, Fe-related compound becomes amorphous when subjected temperature increase.