Temperature-Tuning of Optical Properties and Molecular Aggregation in AnE-PVstat Copolymer Solution
| Autor: | Ulrich S. Schubert, Samir Romdhane, H. Bouchriha, Harald Hoppe, Christoph Ulbricht, Christian Kästner, A. Saaidia, M.A. Saidani, E. Hleli, D.A.M. Egbe, Shahidul Alam, A. Ben Fredj |
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| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science Photoluminescence Intermolecular force 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Dissociation (chemistry) 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Absorbance chemistry.chemical_compound General Energy chemistry Phenylene Chlorobenzene Copolymer Physical chemistry Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 122:3965-3969 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | The correlation between the optical and morphological properties of an anthracene-containing poly(phenylene ethynylene)-alt-(phenylenevinylene) statistical copolymer (AnE-PVstat) in solution has been investigated. As a function of temperature, the molecular aggregation in chloroform/chlorobenzene (CF:CB) solution was examined by means of absorbance and photoluminescence measurements. The study of the evolution of the 0–0 to the 0–1 photoluminescence (PL) ratio with temperature in the framework of the HJ-aggregate model unveiled the presence of both H- and J-like behaviors at room temperature. Upon increasing temperature, the interchain intermolecular coupling decreases, leading to a dissociation of H-aggregates. Hence, molecular torsions are facilitated, polymer planarity is reduced, and the intrachain electronic coupling decreases. |
| Databáze: | OpenAIRE |
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