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Self-Assembly of Discrete Porphyrin/Calix[4]tube Complexes Promoted by Potassium Ion Encapsulation

The pivotal role played by potassium ions in the noncovalent synthesis of discrete porphyrin-calixarene nanostructures has been examined. The flattened-cone conformation adopted by the two cavities of octa-cationic calix[4]tube C4T was found to prevent the formation of complexes with well-defined st...

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Autores principales: Gaeta, Massimiliano, Rodolico, Elisabetta, Fragalà, Maria E., Pappalardo, Andrea, Pisagatti, Ilenia, Gattuso, Giuseppe, Notti, Anna, Parisi, Melchiorre F., Purrello, Roberto, D’Urso, Alessandro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7866244/
https://www.ncbi.nlm.nih.gov/pubmed/33572895
http://dx.doi.org/10.3390/molecules26030704
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author Gaeta, Massimiliano
Rodolico, Elisabetta
Fragalà, Maria E.
Pappalardo, Andrea
Pisagatti, Ilenia
Gattuso, Giuseppe
Notti, Anna
Parisi, Melchiorre F.
Purrello, Roberto
D’Urso, Alessandro
author_facet Gaeta, Massimiliano
Rodolico, Elisabetta
Fragalà, Maria E.
Pappalardo, Andrea
Pisagatti, Ilenia
Gattuso, Giuseppe
Notti, Anna
Parisi, Melchiorre F.
Purrello, Roberto
D’Urso, Alessandro
author_sort Gaeta, Massimiliano
collection PubMed
description The pivotal role played by potassium ions in the noncovalent synthesis of discrete porphyrin-calixarene nanostructures has been examined. The flattened-cone conformation adopted by the two cavities of octa-cationic calix[4]tube C4T was found to prevent the formation of complexes with well-defined stoichiometry between this novel water-soluble calixarene and the tetra-anionic phenylsulfonate porphyrin CuTPPS. Conversely, preorganization of C4T into a C(4v)-symmetrical scaffold, triggered by potassium ion encapsulation (C4T@K(+)), allowed us to carry out an efficient hierarchical self-assembly process leading to 2D and 3D nanostructures. The stepwise formation of discrete CuTPPS/C4T@K(+) noncovalent assemblies, containing up to 33 molecular elements, was conveniently monitored by UV/vis spectroscopy by following the absorbance of the porphyrin Soret band.
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spelling pubmed-78662442021-02-07 Self-Assembly of Discrete Porphyrin/Calix[4]tube Complexes Promoted by Potassium Ion Encapsulation Gaeta, Massimiliano Rodolico, Elisabetta Fragalà, Maria E. Pappalardo, Andrea Pisagatti, Ilenia Gattuso, Giuseppe Notti, Anna Parisi, Melchiorre F. Purrello, Roberto D’Urso, Alessandro Molecules Article The pivotal role played by potassium ions in the noncovalent synthesis of discrete porphyrin-calixarene nanostructures has been examined. The flattened-cone conformation adopted by the two cavities of octa-cationic calix[4]tube C4T was found to prevent the formation of complexes with well-defined stoichiometry between this novel water-soluble calixarene and the tetra-anionic phenylsulfonate porphyrin CuTPPS. Conversely, preorganization of C4T into a C(4v)-symmetrical scaffold, triggered by potassium ion encapsulation (C4T@K(+)), allowed us to carry out an efficient hierarchical self-assembly process leading to 2D and 3D nanostructures. The stepwise formation of discrete CuTPPS/C4T@K(+) noncovalent assemblies, containing up to 33 molecular elements, was conveniently monitored by UV/vis spectroscopy by following the absorbance of the porphyrin Soret band. MDPI 2021-01-29 /pmc/articles/PMC7866244/ /pubmed/33572895 http://dx.doi.org/10.3390/molecules26030704 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Gaeta, Massimiliano
Rodolico, Elisabetta
Fragalà, Maria E.
Pappalardo, Andrea
Pisagatti, Ilenia
Gattuso, Giuseppe
Notti, Anna
Parisi, Melchiorre F.
Purrello, Roberto
D’Urso, Alessandro
Self-Assembly of Discrete Porphyrin/Calix[4]tube Complexes Promoted by Potassium Ion Encapsulation
title Self-Assembly of Discrete Porphyrin/Calix[4]tube Complexes Promoted by Potassium Ion Encapsulation
title_full Self-Assembly of Discrete Porphyrin/Calix[4]tube Complexes Promoted by Potassium Ion Encapsulation
title_fullStr Self-Assembly of Discrete Porphyrin/Calix[4]tube Complexes Promoted by Potassium Ion Encapsulation
title_full_unstemmed Self-Assembly of Discrete Porphyrin/Calix[4]tube Complexes Promoted by Potassium Ion Encapsulation
title_short Self-Assembly of Discrete Porphyrin/Calix[4]tube Complexes Promoted by Potassium Ion Encapsulation
title_sort self-assembly of discrete porphyrin/calix[4]tube complexes promoted by potassium ion encapsulation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7866244/
https://www.ncbi.nlm.nih.gov/pubmed/33572895
http://dx.doi.org/10.3390/molecules26030704
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