Calixarene-Porphyrin Supramolecular Complexes: pH-Tuning of the Complex Stoichiometry

Luigi Di Costanzo; Silvano Geremia; Lucio Randaccio; Roberto Purrello; Rosaria Lauceri; Domenico Sciotto; Fabio Giuseppe Gulino; Vincenzo Pavone

doi:10.1002/1521-3773(20011119)40:22<4245::AID-ANIE4245>3.0.CO;2-#

Calixarene-Porphyrin Supramolecular Complexes: pH-Tuning of the Complex Stoichiometry

Angew Chem Int Ed Engl. 2001 Nov 19;40(22):4245-4247. doi: 10.1002/1521-3773(20011119)40:22<4245::AID-ANIE4245>3.0.CO;2-#.

Authors

Luigi Di Costanzo¹, Silvano Geremia¹, Lucio Randaccio¹, Roberto Purrello², Rosaria Lauceri³, Domenico Sciotto², Fabio Giuseppe Gulino², Vincenzo Pavone⁴

Affiliations

¹ Centro di Eccellenza di Biocristallografia Dipartimento di Scienze Chimiche, Università di Trieste via Licio Giorgieri 1, 34127 Trieste, Italy.
² Dipartimento di Scienze Chimiche Università di Catania via Andrea Doria 6, 95125 Catania, Italy.
³ ISSN, CNR Valverde, Catania, Italy.
⁴ Dipartimento di Chimica, Università "Federico II" Complesso Universitario di Monte S. Angelo via Cynthia 45, 80131 Napoli, Italy.

PMID: 29712104
DOI: 10.1002/1521-3773(20011119)40:22<4245::AID-ANIE4245>3.0.CO;2-#

Abstract

Self-aggregation of water-soluble pyridinium-substituted porphyrins with functionalized calixarenes leads to well-defined pH-tunable stoichiometries. Two assemblies with different porphyrin:calixarene ratios that crystallized at pH 2 and 6 have been structurally characterized. The Job plots of Soret band broadenings indicate that these structures are also preserved in solution.

Keywords: calixarenes; host-guest systems; porphyrinoids; self-assembly; supramolecular chemistry.