Construction of 2-D multilayer structures: silver(I) complexes with linear aromatic compounds

Abstract

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.