synthesis and optical study of a new oligophenylene
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ID: 231457
2012
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Abstract
A new substituted oligophenylene was prepared by the Knoevenagel condensation of 4-methoxybezaldehyde with a functionalized oligophenylene (OMPA). The latter was obtained by (4-methoxy phenyl) acetonitrile electrochemical oxidation.<strong> </strong>The resulting modified oligomer was characterized by various spectroscopic techniques: NMR, FTIR and UV. The thermal study showed that the modified material exhibited a lower thermal stability compared with OMPA. Finally, the optical study revealed that in solution, the emission was red-shifted when compared with the non-modified oligomer emission and that the optical gap changed from 3.1 eV to 2.75 eV. In thin layer solid state, photoluminescence was again red-shifted by 120 nm, which is probably due to an interaction between the oligomer chains. In addition, a transient photoluminescence study was undertaken for the synthesized materials. It showed that the lifetimes of the photo-generated species were shortened by the conjugation extension in the modified oligomer and by the inter-chain interactions in the solid state.
| Reference Key |
roudesli2012polymerssynthesis
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|---|---|
| Authors | ;Sadok Roudesli;Kamel Alimi;Eric Faulques;Jany Wéry;Mourad Chemek;Florian Massuyeau;Ayoub Haj Said;Sarra Ben Amor |
| Journal | Journal of Fluorescence |
| Year | 2012 |
| DOI |
10.3390/polym4021226
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| URL | |
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