Construction of 2-D multilayer structures: silver(I) complexes with linear aromatic compounds
For the purpose of exploring the structural relations of organometallic compounds to their organic components, a series of linear polycyclic aromatic hydrocarbons (PAHs) benzo[a]phenanthrene (L1), dibenz[a,h]anthracene (L2), benz[a]anthracene (L3), and naphtho[2,3-a]pyrene (L4), have been studied towards complexation with silver(I) ion. The crystal structures of [Ag3(L1)(ClO4)3(H2O)2] 1, [Ag2(L2)(ClO4)2] 2, [Ag2(L3)(ClO4)2(H2O)] 3, and [Ag2(L4)(CF3SO3)2] 4 have been determined by single-crystal X-ray diffraction. Although each of these complexes exhibits distinct co-ordination behavior and different frameworks, all of them retain or partially keep the herringbone-packing pattern of their metal-free aromatic ligands in the crystalline state, and display similar two-dimensional multilayer architectures on a given plane. The fundamentals of the synthesis, possible formation mechanism of these polymeric networks and some properties are discussed.