This article describes highly luminescent ionic compounds in liquid and crystalline states, where a naphthalene moiety is conjugated to an imidazolium center decorated with alkyl chains of different lengths. We have characterized, by X-ray diffraction of a single crystal and the liquid, that these compounds are organized in rod-shaped assemblies. The formation of this molecular architecture is governed by ionic interactions that dominate those of the lesser π-π and van der Waals interactions. Consequently, aromatic naphthalene rings are confined to the environment of alkyl chains (diluted in an apolar solvent), thus avoiding the extinction of luminescence by the formation of chromophore excimers, as shown in photophysical data.
Luminescent imidazolium-naphthalene salts in liquid and solid states / M. L'Her, Y. Atoini, J. Fouchet, B. Heinrich, N. Del-Giudice, E. Scrafton, E. Bordes, L. Karmazin, L. Charboniere, L. De Cola, L. Douce. - In: NEW JOURNAL OF CHEMISTRY. - ISSN 1144-0546. - 43:32(2019), pp. 12529-12532. [10.1039/c9nj02972a]
Luminescent imidazolium-naphthalene salts in liquid and solid states
L. De Cola;
2019
Abstract
This article describes highly luminescent ionic compounds in liquid and crystalline states, where a naphthalene moiety is conjugated to an imidazolium center decorated with alkyl chains of different lengths. We have characterized, by X-ray diffraction of a single crystal and the liquid, that these compounds are organized in rod-shaped assemblies. The formation of this molecular architecture is governed by ionic interactions that dominate those of the lesser π-π and van der Waals interactions. Consequently, aromatic naphthalene rings are confined to the environment of alkyl chains (diluted in an apolar solvent), thus avoiding the extinction of luminescence by the formation of chromophore excimers, as shown in photophysical data.File | Dimensione | Formato | |
---|---|---|---|
c9nj02972a.pdf
accesso riservato
Tipologia:
Publisher's version/PDF
Dimensione
2.09 MB
Formato
Adobe PDF
|
2.09 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.