Keywords: Association Reactions, Chirality, Crystalline Materials, Supramolecular Chemistry, X Ray Diffraction Analysis, Achiral Analogues, Aromatic Systems, Supramolecular Structure, Template Imprinting Agents, Porphyrins,
Affiliations: *** IBB - CNR ***
Dipartimento di Chimica, Università degli Studi di Roma La Sapienza, P. le A. Moro 5, 00185 Roma, Italy
Dipartimento di Scienze e Tecnologie Chimiche, Universitài di Torvergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy
IBB, CNR-Sezione di Catania, Dipartimento di Scienze Chimiche, Viale A. Doria 6, 95125 Catania, Italy
References: Not available.
Supramolecular structure of extrinsically chiral porphyrin hetero-assemblies and achiral analogues
The first structural determination of a porphyrin (chiral) hetero-aggregate through energy dispersive X-ray diffraction analysis (EDXD) due to poor crystalline character of the aggregates is demonstrated. Some of the porphyrins possess an extended aromatic system, though the structure is flexible and several ways of inducing nonplanar deformations of the macrocycle are known. The incorporation of the metal atoms of different sizes in the center of the macrocycle and porphyrins peripheral substitutions influence the non-planar distortion. The suprachiral structure is strictly related to the use of a single isomer of the template imprinting agent. The use of a template racemic mixture yields porphyrin hetero-aggregates without the association of circular dichroism.
Supramolecular structure of extrinsically chiral porphyrin hetero-assemblies and achiral analogues
No results.
Supramolecular structure of extrinsically chiral porphyrin hetero-assemblies and achiral analogues