Role of counteranions in acid-induced aggregation of isomeric tetrapyridylporphyrins in organic solvents (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Role of counteranions in acid-induced aggregation of isomeric tetrapyridylporphyrins in organic solvents (Articolo in rivista) (literal)

Anno

• 2005-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1021/jp0448797 (literal)

Alternative label

• Giovanna De Luca; Andrea Romeo; Luigi Monsù Scolaro (2005)
  Role of counteranions in acid-induced aggregation of isomeric tetrapyridylporphyrins in organic solvents
  in The journal of physical chemistry. B
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Giovanna De Luca; Andrea Romeo; Luigi Monsù Scolaro (literal)

Pagina inizio

• 7149 (literal)

Pagina fine

• 7158 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

• http://pubs.acs.org/doi/abs/10.1021/jp0448797 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 109 (literal)

Rivista

• ?The ?journal of physical chemistry. B (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Univ Messina, Dipartimento Chim Inorgan Chim Analit & Chim Fis, I-98166 Messina, Italy (literal)

Titolo

• Role of counteranions in acid-induced aggregation of isomeric tetrapyridylporphyrins in organic solvents (literal)

Abstract

• The effect of adding various kinds of acids HX (X = Cl, Br, I, CF3COO, CF3SO3, TFPB ((3,5-(CF3)2C6H3)4B) to isomeric tetra(2-pyridyl)porphyrin, tetra(3-pyridyl)porphyrin, and tetra(4-pyridyl)porphyrin (TpyP(2), TpyP(3), and TpyP(4)) in dichloromethane solution has been investigated through the combined use of UV/vis absorption, fluorescence emission, and resonance light scattering (RLS) techniques. The experimental evidence points to a marked dependence of the protonation and aggregation behavior on the nature of both acids and porphyrins. In general, three different trends can be recognized: (i) formation of a fully protonated species, followed by aggregation; (ii) formation of a tetraprotonated species, which aggregates and, on further addition of acid, disaggregates; and (iii) protonation of the four pyridyl moieties, leading to a tetraprotonated ion pair, in the unique case of the bulky TFPB- anion. In all cases, the protonated species and the resulting aggregates exhibit spectroscopic features that are markedly influenced by the nature of the counteranions. A model for J-aggregation has been proposed on the basis of an interplay of hydrogen bonding, electrostatic interactions, and dispersive interactions. Kinetic control of the aggregation process allows for a fine-tuning of the spectroscopic properties of the final aggregated species. (literal)

Prodotto di

• NUOVI MATERIALI FUNZIONALI ED ARCHITETTURE DI TRASDUZIONE INTEGRATE PER IL BIOSENSING (PM.P04.013.002) (Modulo)
• Institute for composite and biomedical materials (IMCB) (Istituto)
• Sintesi e crescita di film e superfici nanostrutturate (PM.P05.004.002) (Modulo)
• Istituto per lo studio dei materiali nanostrutturati (ISMN) (Istituto)

Autore CNR

• LUIGI MONSU SCOLARO (Unità di personale esterno)
• ANDREA ROMEO (Unità di personale esterno)
• GIOVANNA DE LUCA (Persona)

Incoming links:

Prodotto

• Institute for composite and biomedical materials (IMCB) (Istituto)
• Istituto per lo studio dei materiali nanostrutturati (ISMN) (Istituto)
• NUOVI MATERIALI FUNZIONALI ED ARCHITETTURE DI TRASDUZIONE INTEGRATE PER IL BIOSENSING (PM.P04.013.002) (Modulo)
• Sintesi e crescita di film e superfici nanostrutturate (PM.P05.004.002) (Modulo)

Autore CNR di

• GIOVANNA DE LUCA (Persona)
• LUIGI MONSU SCOLARO (Unità di personale esterno)
• ANDREA ROMEO (Unità di personale esterno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• ?The ?journal of physical chemistry. B (Rivista)