EnglishInteraction of oxacarbocyanines D-G with three polycations in aqueous solutions results in the formation of two types of likely small, distorted aggregates rather than the classical J aggregates. On the contrary, the latter are extensively and almost exclusively obtained in electrostatically self-assembled multilayers (ESAMs) prepared by alternate polycation/dye adsorption on quartz substrates. The J-aggregate growth on supported polycations is qualitatively shared by the four cyanines, a fact that reveals the crucial role of the double anionic substitutions on the dyes. On the other hand, films with D and E, which are known to have a stronger tendency to give dimers in water, exhibit higher J-band intensities and stability upon drying relative to those with F and G. Based on these observations, we suggest that energetic factors associated with cofacial dye/dye van der Waals interactions, ultimately related with the degree of planarity of the conjugated chromophores, may still play a major role in controlling aggregation equilibria in these complex systems.
| Data di pubblicazione: | 2006 |
| Titolo: | Aggregation modes of anionic oxacarbocyanines with polycations in solution and in ESAMs |
| Autore/i: | Lodi, A; Ponterini, Glauco |
| Autore/i UNIMORE: | |
| Rivista: | |
| Volume: | 2006 |
| Pagina iniziale: | 1 |
| Pagina finale: | 7 |
| Codice identificativo ISI: | WOS:000242570900001 |
| Codice identificativo Scopus: | 2-s2.0-34547648606 |
| Citazione: | Aggregation modes of anionic oxacarbocyanines with polycations in solution and in ESAMs / Lodi, A; Ponterini, Glauco. - In: INTERNATIONAL JOURNAL OF PHOTOENERGY. - ISSN 1110-662X. - ELETTRONICO. - 2006(2006), pp. 1-7. |
| Tipologia | Articolo su rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | |
|---|---|---|---|
| 072383.pdf | Versione editoriale | Open Access Visualizza/Apri |
http://hdl.handle.net/11380/612115
I documenti presenti in Iris Unimore sono rilasciati con licenza Creative Commons Attribuzione - Non commerciale - Non opere derivate 3.0 Italia, salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris
Copyright © 2020