| Weak intermolecular interactions play vital roles in the aggregation of molecular components in materials of biological and technological importance. The results reported herein concentrates on two areas: the weak charge transfer interactions between electron donors, metalloporphyrins and polyhaloazatriquinacenes, with curved aromatic surfaces of fullerenes, and the metallophilic interaction of silver(I) and gold(I) compounds.;In charge transfer complexes of fullerenes, the molecular aggregates contained orientationally fixed fullerene cages. Specifically with the polyhaloazatriquinacenes-fullerene systems, regular patterns of interactions are observed between the halogens with the pi system. In all structures, the halogen centers approached very close to the fullerene surfaces, and in many cases with X···C distances shorter than the combined Van der Waal radii of the respective halogen species involved. The direct result of these interactions is that the fullerene cages in these structures are not rotationally disordered.;The aggregation of both cationic and anionic species of silver(I) and gold(I) are also reported herein. While the metallophilically aggregated anionic silver(I) and gold(I) compounds gave interesting solid state structures with well defined hydrogen bonding networks, the aggregation of the cationic gold(I) yielded compounds with tunable luminescent properties. The shapes and sizes of the counter ions influenced the luminescent properties of these complexes by modulating the gold(I)···gold(I) distances through the hydrogen bonding backbone. In AsF6- solvated structures, guest solvent molecules sterically forced the anions to shift relative to the cation chains. These minor modulations in the positions of the anions result in observable changes in the emission properties of these compounds. |
