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Travagliante G, Gaeta M, Purrello R, Urso AD. Supramolecular Chirality in Porphyrin Self-assembly Systems in Aqueous Solution. CURR ORG CHEM 2022. [DOI: 10.2174/1385272826666220330112648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
The self-assembly process appears as a powerful and attractive strategy for constructing complex supramolecules by the spontaneous organization of appropriate building blocks. In this scenario, water-soluble porphyrinoids lend themselves as ideal paradigms to disclose the self-assembly phenomenon by exploiting their well-known tendency to build aggregates in aqueous media via weak non-covalent forces. Nevertheless, the spontaneous organization of achiral porphyrins can result in a final chiral superstructure moving away from single-molecule behaviour to supramolecular chirality. Therefore, over the years numerous attempts have been implemented to investigate how a porphyrin aggregate, made up of achiral monomers, becomes not-symmetric and which processes govern the bias for a certain enantiomeric assembly rather than another. Thus, in this mini-review, we exclusively discuss the main strategies for designing and building chiral aggregates in water from achiral porphyrin monomers, with particular regard to their chiroptical features.
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Affiliation(s)
- Gabriele Travagliante
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, 95125 Catania, Italy,
| | - Massimiliano Gaeta
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, 95125 Catania, Italy,
| | - Roberto Purrello
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, 95125 Catania, Italy,
| | - Alessandro D’ Urso
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, 95125 Catania, Italy,
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Anantharaman SB, Kohlbrecher J, Rainò G, Yakunin S, Stöferle T, Patel J, Kovalenko M, Mahrt RF, Nüesch FA, Heier J. Enhanced Room-Temperature Photoluminescence Quantum Yield in Morphology Controlled J-Aggregates. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:1903080. [PMID: 33643780 PMCID: PMC7887577 DOI: 10.1002/advs.201903080] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/04/2020] [Indexed: 05/12/2023]
Abstract
Supramolecular assemblies from organic dyes forming J-aggregates are known to exhibit narrowband photoluminescence with full-width at half maximum of ≈9 nm (260 cm-1). Applications of these high color purity emitters, however, are hampered by the rather low photoluminescence quantum yields reported for cyanine J-aggregates, even when formed in solution. Here, it is demonstrated that cyanine J-aggregates can reach an order of magnitude higher photoluminescence quantum yield (increase from 5% to 60%) in blend solutions of water and alkylamines at room temperature. By means of time-resolved photoluminescence studies, an increase in the exciton lifetime as a result of the suppression of non-radiative processes is shown. Small-angle neutron scattering studies suggest a necessary condition for the formation of such highly emissive J-aggregates: the presence of a sharp water/amine interface for J-aggregate assembly and the coexistence of nanoscale-sized water and amine domains to restrict the J-aggregate size and solubilize monomers, respectively.
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Affiliation(s)
- Surendra B. Anantharaman
- Laboratory for Functional PolymersEmpaSwiss Federal Laboratories for Materials Science and TechnologyÜberlandstrasse 129DübendorfCH‐8600Switzerland
- Institut des MatériauxÉcole Polytechnique Fédérale de LausanneEPFL Station 12LausanneCH‐1015Switzerland
- Present address:
Department of Electrical and Systems EngineeringUniversity of PennsylvaniaSäumerstrasse 4, RüschlikonPhiladelphiaPA19104USA
| | - Joachim Kohlbrecher
- Laboratory for Neutron Scattering and Imaging (LNS)Paul Scherrer InstituteVilligenCH‐5232Switzerland
| | - Gabriele Rainò
- Laboratory of Inorganic ChemistryDepartment of Chemistry and Applied BiosciencesETH ZürichVladimir Prelog‐Weg 1ZürichCH‐8093Switzerland
- Laboratory for Thin Films and PhotovoltaicsEmpaSwiss Federal Laboratories of Materials Science and TechnologyÜberlandstrasse 129, DübendorfZürichCH‐8600Switzerland
| | - Sergii Yakunin
- Laboratory of Inorganic ChemistryDepartment of Chemistry and Applied BiosciencesETH ZürichVladimir Prelog‐Weg 1ZürichCH‐8093Switzerland
- Laboratory for Thin Films and PhotovoltaicsEmpaSwiss Federal Laboratories of Materials Science and TechnologyÜberlandstrasse 129, DübendorfZürichCH‐8600Switzerland
| | - Thilo Stöferle
- IBM Research–ZurichSäumerstrasse 4, RüschlikonZürichCH‐8803Switzerland
| | - Jay Patel
- Laboratory for Functional PolymersEmpaSwiss Federal Laboratories for Materials Science and TechnologyÜberlandstrasse 129DübendorfCH‐8600Switzerland
| | - Maksym Kovalenko
- Laboratory of Inorganic ChemistryDepartment of Chemistry and Applied BiosciencesETH ZürichVladimir Prelog‐Weg 1ZürichCH‐8093Switzerland
- Laboratory for Thin Films and PhotovoltaicsEmpaSwiss Federal Laboratories of Materials Science and TechnologyÜberlandstrasse 129, DübendorfZürichCH‐8600Switzerland
| | - Rainer F. Mahrt
- IBM Research–ZurichSäumerstrasse 4, RüschlikonZürichCH‐8803Switzerland
| | - Frank A. Nüesch
- Laboratory for Functional PolymersEmpaSwiss Federal Laboratories for Materials Science and TechnologyÜberlandstrasse 129DübendorfCH‐8600Switzerland
- Institut des MatériauxÉcole Polytechnique Fédérale de LausanneEPFL Station 12LausanneCH‐1015Switzerland
| | - Jakob Heier
- Laboratory for Functional PolymersEmpaSwiss Federal Laboratories for Materials Science and TechnologyÜberlandstrasse 129DübendorfCH‐8600Switzerland
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Manganaro N, Zagami R, Trapani M, Castriciano MA, Romeo A, Scolaro LM. Role of Cobalt(III) Cationic Complexes in the Self-Assembling Process of a Water Soluble Porphyrin. Int J Mol Sci 2020; 22:ijms22010039. [PMID: 33375184 PMCID: PMC7792976 DOI: 10.3390/ijms22010039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 12/18/2020] [Accepted: 12/20/2020] [Indexed: 12/26/2022] Open
Abstract
Under moderate acidic conditions, the cationic (+3) complexes ions tris(1,10-phenanthroline)cobalt(III), [Co(phen)3]3+, and hexamminecobalt(III), [Co(NH3)6]3+, efficiently promote the self-assembling process of the diacid 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (H2TPPS4) into J-aggregates. The growth kinetics have been analyzed according to a well-established autocatalytic model, in which the rate determining step is the initial formation of a nucleus containing m porphyrin units (in the range 2–3), followed by a stage whose rate constant kc evolves as a power of time. The observed catalytic rate constants and the extent of J-aggregation increase on increasing the metal complex concentration, with the phen complex being the less active. The UV/Vis extinction spectra display quite broad envelops at the J-band, especially for the amino-complex, suggesting that electronic dipolar coupling between chromophores is operative in these species. The occurrence of spontaneous symmetry breaking has been revealed by circular dichroism and the measured dissymmetry g-factor decreases on increasing the aggregation rates. The role of these metal complexes on the growth and stabilization of porphyrin nano-assemblies is discussed in terms of the different degree of hydrophilicity and hydrogen bonding ability of the ligands present in the coordination sphere around the metal center.
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Affiliation(s)
- Nadia Manganaro
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina and C.I.R.C.M.S.B V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (N.M.); (A.R.)
| | - Roberto Zagami
- CNR—ISMN Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (R.Z.); (M.T.); (M.A.C.)
| | - Mariachiara Trapani
- CNR—ISMN Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (R.Z.); (M.T.); (M.A.C.)
| | - Maria Angela Castriciano
- CNR—ISMN Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (R.Z.); (M.T.); (M.A.C.)
| | - Andrea Romeo
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina and C.I.R.C.M.S.B V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (N.M.); (A.R.)
- CNR—ISMN Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (R.Z.); (M.T.); (M.A.C.)
| | - Luigi Monsù Scolaro
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina and C.I.R.C.M.S.B V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (N.M.); (A.R.)
- CNR—ISMN Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (R.Z.); (M.T.); (M.A.C.)
- Correspondence: ; Tel.: +39-090-6765711
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Occhiuto IG, Castriciano MA, Trapani M, Zagami R, Romeo A, Pasternack RF, Monsù Scolaro L. Controlling J-Aggregates Formation and Chirality Induction through Demetallation of a Zinc(II) Water Soluble Porphyrin. Int J Mol Sci 2020; 21:ijms21114001. [PMID: 32503280 PMCID: PMC7313071 DOI: 10.3390/ijms21114001] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/01/2020] [Accepted: 06/01/2020] [Indexed: 12/13/2022] Open
Abstract
Under acidic conditions and at high ionic strength, the zinc cation is removed from its metal complex with 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS4) thus leading to the diacid free porphyrin, that subsequently self-organize into J-aggregates. The kinetics of the demetallation step and the successive supramolecular assembly formation have been investigated as a function of pH and ionic strength (controlled by adding ZnSO4). The demetallation kinetics obey to a rate law that is first order in [ZnTPPS4] and second order in [H+], according to literature, with k2 = 5.5 ± 0.4 M−2 s−1 at 298 K (IS = 0.6 M, ZnSO4). The aggregation process has been modeled according to an autocatalytic growth, where after the formation of a starting seed containing m porphyrin units, the rate evolves as a power of time. A complete analysis of the extinction time traces at various wavelengths allows extraction of the relevant kinetic parameters, showing that a trimer or tetramer should be involved in the rate-determining step of the aggregation. The extinction spectra of the J-aggregates evidence quite broad bands, suggesting an electronic coupling mechanism different to the usual Frenkel exciton coupling. Resonance light scattering intensity in the aggregated samples increases with increasing both [H+] and [ZnSO4]. Symmetry breaking occurs in these samples and the J-aggregates show circular dichroism spectra with unusual bands. The asymmetry g-factor decreases in its absolute value with increasing the catalytic rate kc, nulling and eventually switching the Cotton effect from negative to positive. Some inferences on the role exerted by zinc cations on the kinetics and structural features of these nanostructures have been discussed.
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Affiliation(s)
- Ilaria Giuseppina Occhiuto
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina and C.I.R.C.M.S.B V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy;
| | - Maria Angela Castriciano
- CNR-ISMN Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (M.T.); (R.Z.)
- Correspondence: (M.A.C.); (A.R.); (L.M.S.); Tel.: +39-090-6765711 (L.M.S.)
| | - Mariachiara Trapani
- CNR-ISMN Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (M.T.); (R.Z.)
| | - Roberto Zagami
- CNR-ISMN Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (M.T.); (R.Z.)
| | - Andrea Romeo
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina and C.I.R.C.M.S.B V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy;
- CNR-ISMN Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (M.T.); (R.Z.)
- Correspondence: (M.A.C.); (A.R.); (L.M.S.); Tel.: +39-090-6765711 (L.M.S.)
| | - Robert F. Pasternack
- Department of Chemistry, Swarthmore College, 500 College Avenue, Swarthmore, PA 19081, USA;
| | - Luigi Monsù Scolaro
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina and C.I.R.C.M.S.B V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy;
- CNR-ISMN Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D’Alcontres, 31-98166 Messina, Italy; (M.T.); (R.Z.)
- Correspondence: (M.A.C.); (A.R.); (L.M.S.); Tel.: +39-090-6765711 (L.M.S.)
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Trapani M, Mazzaglia A, Piperno A, Cordaro A, Zagami R, Castriciano MA, Romeo A, Monsù Scolaro L. Novel Nanohybrids Based on Supramolecular Assemblies of Meso-tetrakis-(4-sulfonatophenyl) Porphyrin J-aggregates and Amine-Functionalized Carbon Nanotubes. NANOMATERIALS 2020; 10:nano10040669. [PMID: 32252418 PMCID: PMC7221796 DOI: 10.3390/nano10040669] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/14/2020] [Accepted: 03/26/2020] [Indexed: 12/12/2022]
Abstract
The ability of multiwalled carbon nanotubes (MWCNTs) covalently functionalized with polyamine chains of different length (ethylenediamine, EDA and tetraethylenepentamine, EPA) to induce the J-aggregation of meso-tetrakis(4-sulfonatophenyl)porphyrin (TPPS) was investigated in different experimental conditions. Under mild acidic conditions, protonated amino groups allow for the assembly by electrostatic interaction with the diacid form of TPPS, leading to hybrid nanomaterials. The presence of only one pendant amino group for a chain in EDA does not lead to any aggregation, whereas EPA (with four amine groups for chain) is effective in inducing J-aggregation using different mixing protocols. These nanohybrids have been characterized through UV/Vis extinction, fluorescence emission, resonance light scattering and circular dichroism spectroscopy. Their morphology and chemical composition have been elucidated through transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM). TEM and STEM analysis evidence single or bundles of MWCNTs in contact with TPPS J-aggregates nanotubes. The nanohybrids are quite stable for days, even in aqueous solutions mimicking physiological medium (NaCl 0.15 M). This property, together with their peculiar optical features in the therapeutic window of visible spectrum, make them potentially useful for biomedical applications.
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Affiliation(s)
- Mariachiara Trapani
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, V. le F. Stagno D’Alcontres 31, 98166 Messina, Italy; (M.T.); (A.C.); (R.Z.); (A.R.); (L.M.S.)
| | - Antonino Mazzaglia
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, V. le F. Stagno D’Alcontres 31, 98166 Messina, Italy; (M.T.); (A.C.); (R.Z.); (A.R.); (L.M.S.)
- Correspondence: (A.M.); (M.A.C.)
| | - Anna Piperno
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, V. le F. Stagno D’Alcontres 31, 98166 Messina, Italy;
- Consorzio Interuniversitario Nazionale di Ricerca in Metodologie e Processi Innovativi di Sintesi, C.I.N.M.P.I.S., Unità Operativa dell’Università di Messina, V. le F. Stagno D’Alcontres, 3198166 Messina, Italy
| | - Annalaura Cordaro
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, V. le F. Stagno D’Alcontres 31, 98166 Messina, Italy; (M.T.); (A.C.); (R.Z.); (A.R.); (L.M.S.)
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, V. le F. Stagno D’Alcontres 31, 98166 Messina, Italy;
| | - Roberto Zagami
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, V. le F. Stagno D’Alcontres 31, 98166 Messina, Italy; (M.T.); (A.C.); (R.Z.); (A.R.); (L.M.S.)
| | - Maria Angela Castriciano
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, V. le F. Stagno D’Alcontres 31, 98166 Messina, Italy; (M.T.); (A.C.); (R.Z.); (A.R.); (L.M.S.)
- Correspondence: (A.M.); (M.A.C.)
| | - Andrea Romeo
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, V. le F. Stagno D’Alcontres 31, 98166 Messina, Italy; (M.T.); (A.C.); (R.Z.); (A.R.); (L.M.S.)
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, V. le F. Stagno D’Alcontres 31, 98166 Messina, Italy;
- Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici, C.I.R.C.M.S.B, Unità Operativa dell’Università di Messina, V. le F. Stagno D’Alcontres, 31, 98166 Messina, Italy
| | - Luigi Monsù Scolaro
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, V. le F. Stagno D’Alcontres 31, 98166 Messina, Italy; (M.T.); (A.C.); (R.Z.); (A.R.); (L.M.S.)
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, V. le F. Stagno D’Alcontres 31, 98166 Messina, Italy;
- Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici, C.I.R.C.M.S.B, Unità Operativa dell’Università di Messina, V. le F. Stagno D’Alcontres, 31, 98166 Messina, Italy
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Trapani M, De Luca G, Romeo A, Castriciano MA, Scolaro LM. Spectroscopic investigation on porphyrins nano-assemblies onto gold nanorods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 173:343-349. [PMID: 27685002 DOI: 10.1016/j.saa.2016.09.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 09/06/2016] [Accepted: 09/17/2016] [Indexed: 05/25/2023]
Abstract
The interaction between gold nanorods (Au NRs), synthesized by a conventional seeded growth protocol, and the anionic tetrakis-(4-sulfonatophenyl)porphyrin (TPPS4) has been investigated through various spectroscopic techniques. At neutral pH, the formation of H-aggregates and the inclusion of porphyrin monomers in CTAB micelles covering the nanorods have been evidenced. Under mild acidic conditions (pH=3) a nano-hybrid assembly of porphyrin J-aggregates and Au NRs has been revealed. For the sake of comparison, Cu(II) and Zn(II) metal porphyrin derivatives as well as a cationic porphyrin have been studied in the same experimental conditions, showing that: i) CuTPPS4 forms porphyrin H-dimers onto the Au NRs; ii) ZnTPPS4 undergoes to demetallation, followed by acidification of the central core and eventually aggregation onto Au NRs; iii) cationic porphyrin does not interact with Au NRs.
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Affiliation(s)
- Mariachiara Trapani
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D'Alcontres, 31 98166 Messina, Italy
| | - Giovanna De Luca
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina and C.I.R.C.M.S.B, V.le F. Stagno D'Alcontres, 31 98166 Messina, Italy; CNR-IPCB Istituto dei Polimeri, Compositi e Biomateriali - P.le Enrico Fermi 1, 80055 Portici (NA), Italy
| | - Andrea Romeo
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D'Alcontres, 31 98166 Messina, Italy; Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina and C.I.R.C.M.S.B, V.le F. Stagno D'Alcontres, 31 98166 Messina, Italy
| | - Maria Angela Castriciano
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D'Alcontres, 31 98166 Messina, Italy.
| | - Luigi Monsù Scolaro
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina, V.le F. Stagno D'Alcontres, 31 98166 Messina, Italy; Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina and C.I.R.C.M.S.B, V.le F. Stagno D'Alcontres, 31 98166 Messina, Italy.
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Romeo A, Angela Castriciano M, Scolaro LM. Spectroscopic and kinetic investigations on porphyrin J-aggregates induced by polyamines. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424610002586] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A non-covalent supramolecular approach to build up mesoscopic fractal J-aggregates of meso-tetrakis(4-sulfonatophenyl)porphyrin by using different polyamines under mild acidic conditions is reported. Spermine-induced J-aggregates have been treated as a model system for a kinetic investigation. The kinetic analysis has been performed through two non-conventional approaches as function of a different reagent mixing protocol. In particular, an autocatalytic pathway in which the formation of aggregation nuclei is the rate-determining step is found when porphyrin is added to the reaction mixture as first reagent. In order to gain information on this early stage, a kinetic investigation has been carried out as function of different parameters, such as pH, and both spermine and porphyrin concentration. The nucleation becomes particularly evident when polyamines with fewer than three protonable nitrogen atoms are used. In these cases, a sort of "YES/NO" effect for the aggregation process has been found as a function of the reagent mixing order protocol. Most importantly, the observed kinetic behavior strongly affects the mesoscopic structure of the final aggregates.
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Affiliation(s)
- Andrea Romeo
- Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina, Salita Sperone 31, 98166 Vill.S.Agata, Messina, Italy
- C.I.R.C.M.S.B. Salita Sperone 31, 98166 Vill.S.Agata, Messina, Italy
| | | | - Luigi Monsù Scolaro
- Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina, Salita Sperone 31, 98166 Vill.S.Agata, Messina, Italy
- C.I.R.C.M.S.B. Salita Sperone 31, 98166 Vill.S.Agata, Messina, Italy
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Castriciano MA, Carbone A, Saccà A, Donato MG, Micali N, Romeo A, De Luca G, Scolaro LM. Optical and sensing features of TPPS4 J-aggregates embedded in Nafion® membranes: influence of casting solvents. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b924667c] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Castriciano MA, Donato MG, Villari V, Micali N, Romeo A, Scolaro LM. Surfactant-like behavior of short-chain alcohols in porphyrin aggregation. J Phys Chem B 2009; 113:11173-8. [PMID: 19627096 DOI: 10.1021/jp903430u] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
UV/vis absorption and time-resolved fluorescence measurements on alcoholic solutions of meso-tetrakis(4-sulfonatophenyl)porphyrin (TPPS(4)) in neutral and acid form have been performed as a function of the alcohol polarity. These solutions show a peculiar behavior that mimics porphyrin in confined water solutions. In alcohols, TPPS(4) exhibits a metastable phase showing the formation of new species in analogy with the confined water environment of AOT microemulsions. Various species have been detected at different pH values and on aging the solutions. Under neutral pH conditions, the porphyrin is present as free base monomer (S415) with a small amount of H-dimeric species (S400). On aging, the S415 leads to the formation of a new species (S423), which has been assigned as a J-type dimer of the neutral porphyrin. The species S400 and S423 are not present in bulk water solution but are typical of TPPS(4) in confined water. On decreasing pH, the S415 almost immediately converts into the diacid form (S438), which evolves toward red-shifted J-aggregates (S490) and blue-shifted H-aggregates (S420). On decreasing alcohol polarity, the kinetic evolution from fresh to aged solution and from the monomeric diacid species to H- and J-aggregates speeds up. Exploiting the amphiphilic character of short chain alcohols and widely varying their polarity, we were able to enhance in bulk conditions the peculiar behavior observed in close proximity to the microemulsion wall.
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Micali N, Villari V, Castriciano MA, Romeo A, Monsù Scolaro L. From fractal to nanorod porphyrin J-aggregates. Concentration-induced tuning of the aggregate size. J Phys Chem B 2007; 110:8289-95. [PMID: 16623510 DOI: 10.1021/jp060730e] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A structural change from fractal to nanorod J-aggregates of tetrakis(4-sulfonatophenyl)porphyrin has been obtained by acting on the intermolecular interaction potential. The size and shape of these self-assembled porphyrin clusters have been monitored under different experimental conditions, by means of polarized and depolarized dynamic light scattering and small and wide angle elastic light scattering. At sufficiently low porphyrin concentration and high ionic strength, the shielded repulsive potential seems to be responsible for the fractal structure of the aggregates. On the contrary, at low ionic strength (nonshielded potential) and high porphyrin concentration, these species self-assemble in a rodlike arrangement. The length of the so-formed rod-shaped aggregates decreases on increasing porphyrin concentration. Moreover, both fractals and rods display a structure-dependent optical activity induced by a chiral template.
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Affiliation(s)
- Norberto Micali
- CNR-Istituto per i Processi Chimico-Fisici, Via La Farina 237, I-98123 Messina, Italy
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Micali N, Villari V, Romeo A, Castriciano MA, Scolaro LM. Evidence of the early stage of porphyrin aggregation by enhanced Raman scattering and fluorescence spectroscopy. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 76:011404. [PMID: 17677438 DOI: 10.1103/physreve.76.011404] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2007] [Indexed: 05/16/2023]
Abstract
The early stage of fractal porphyrin diffusion-limited aggregation (DLA), induced by addition of a polyamine, is observed in aqueous solution by enhanced Raman scattering and fluorescence quenching. The enhancement of Raman scattering is due to nonlinear optical properties typical of fractal composites. Although this early stage (reaction-limited aggregation) has been theoretically predicted (by mean-field theory and molecular dynamics simulation), it is experimentally difficult to observe. During this initial stage, fluorescence quenching gives direct information on the decrease of the concentration of monomeric porphyrins, whereas Raman scattering (through characteristic vibrational modes of the aggregate) reports on the concentration of porphyrins in the aggregated form. These small clusters constitute the seeds for the DLA aggregation process leading to micrometric-sized fractals.
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Affiliation(s)
- Norberto Micali
- Istituto per i Processi Chimico-Fisici, CNR, Via La Farina 237, I-98123, Messina, Italy.
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Gucciardi PG, Trusso S, Vasi C, Patanè S, Allegrini M. Near-Field Raman Spectroscopy and Imaging. APPLIED SCANNING PROBE METHODS V 2007. [DOI: 10.1007/978-3-540-37316-2_10] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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