ABSTRACT: Absorption, photoluminescence, and Raman scattering measurements have been performed on a fourfold alkoxy-substituted phthalocyanine in solution and in the discotic liquid crystal phase. As already known for this class of compounds, the features of the electronic spectra in the condensed state are determined by the spatial closeness and arrangement of the systems of the phthalocyanine cores, with the occurrence of collectively excited states and excimer-like emission. Quantitative information about the alignment of the molecules which compose the liquid crystal phase has been obtained from the analysis of polarized Raman spectra of homeotropically aligned samples.
Absorption, photoluminescence and polarized Raman spectra of a four-fold alkoxy-substituted phthalocyanine liquid-crystal / E. Venuti; R.G. Della Valle; I. Bilotti; A. Brillante; M. Cavallini; A. Calo'; Y.H. Geerts. - In: JOURNAL OF PHYSICAL CHEMISTRY. C. - ISSN 1932-7447. - STAMPA. - 115:(2011), pp. 12150-12157. [10.1021/jp202926j]
Absorption, photoluminescence and polarized Raman spectra of a four-fold alkoxy-substituted phthalocyanine liquid-crystal
VENUTI, ELISABETTA;DELLA VALLE, RAFFAELE GUIDO;BILOTTI, IVANO;BRILLANTE, ALDO;
2011
Abstract
ABSTRACT: Absorption, photoluminescence, and Raman scattering measurements have been performed on a fourfold alkoxy-substituted phthalocyanine in solution and in the discotic liquid crystal phase. As already known for this class of compounds, the features of the electronic spectra in the condensed state are determined by the spatial closeness and arrangement of the systems of the phthalocyanine cores, with the occurrence of collectively excited states and excimer-like emission. Quantitative information about the alignment of the molecules which compose the liquid crystal phase has been obtained from the analysis of polarized Raman spectra of homeotropically aligned samples.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
