title: [2]Catenanes and inclusion complexes derived from self-assembled rectangular Pd(II) and Pt(II) metallocycles.
abstract: New inclusion complexes and [2]catenanes were self-assembled from a fluorescent diazapyrenium based ligand, a PdII or PtII complex, and cyclic or acyclic electron rich aromatic guests in aqueous and organic media. The molecular rectangles display a π-deficient cavity suitable to incorporate π-donor aromatic systems. The inclusion complexes between the metallocycles and phenylenic (2a,b) and naphthalenic (3a,b–5a,b) derivatives were studied by NMR, UV-vis and fluorescence spectroscopy. The crystal structure of (3b) ⊂ 1a·6PF(6) confirmed the insertion of the guest into the cavity of the metallocycle. Following the same self-assembly strategy, the use of polyethers 6,7 as π-donors resulted in the self-assembly of the [2]catenanes 1a(6,7)·6PF(6). Single-crystal X-ray analysis of 1a(7)·6PF6 revealed the [2]catenane structure being stabilized by π-stacking and [C–H···O] interactions.
authors: Departamento de Química Fundamental, Universidade da Coruña, Campus da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain.
authors: Cristina
authors: C
authors: Alvariño
authors: Alessio
authors: A
authors: Terenzi
authors: Víctor
authors: V
authors: Blanco
authors: Marcos D
authors: MD
authors: García
authors: Carlos
authors: C
authors: Peinador
authors: José M
authors: JM
authors: Quintela