Hierarchical Porphyrin Self-Assembly in Aqueous Solution

J. Am. Chem. Soc., 126 (19), 5934 -5935, 2004. 10.1021/ja0494757 S0002-7863(04)09475-2
Web Release Date: April 23, 2004

Hierarchical Porphyrin Self-Assembly in Aqueous Solution

Massimo De Napoli, Sara Nardis, Roberto Paolesse, M. Graça H. Vicente,* Rosaria Lauceri,* and Roberto Purrello*

Dipartimento di Scienze Chimiche, Università di Catania, Viale A, Doria 6, 95125 Catania, Italy, Dipartimento di Scienze e Tecnologie Chimiche, Università Tor Vergata, Via della Ricerca Scientifica 1, 00175 Roma, Italy, Chemistry Department, Louisiana State University, Baton Rouge, Louisiana 70803, and Istituto di Biostrutture e Bioimmagini-Sezione di Catania, C.N.R., Viale A, Doria 6, 95125 Catania, Italy

rpurrello@dipchi.unict.it; slauceri@dipchi.unict.it; vicente@lsu.edu

Received January 29, 2004

Abstract:

In aqueous solution meso-tetrakis(4-phosphonatophenyl)porphyrin shows self-aggregation processes controlled by the "sergeant-soldier rule". After partial protonation of the external phosphonic groups, it is possible (i) to further protonate the inner nitrogen atoms of the molecules or (ii) to allow, over time, the system to aggregate. Therefore, the two procedure lead to a different system evolution, producing species with different chemico-physical properties.

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