Effects of the host molecular dynamics on the photoemission temperature dependence of host/guest photoluminescent blends
| Autor: | José Roberto Tozoni, Durval Bertoldo Menezes, Yvonne Primerano Mascarenhas, Silésia de Fátima Curcino da Silva, Alexandre Marletta, Leni Akcelrud, Teresa D. Z. Atvars, Débora Terezia Balogh |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Diffraction Photoluminescence Materials science Polymers and Plastics Organic Chemistry Analytical chemistry 02 engineering and technology Polymer Dynamic mechanical analysis 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Molecular dynamics Crystallography chemistry Ellipsometry BLENDAS Materials Chemistry 0210 nano-technology Spectroscopy Alkyl |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | In the present paper, the photoemission temperature dependence of host/guest blends has been investigated. The polymers blend is composed by poly( n -alkyl metacrylate) (PnMA) as a host and poly[(9,9-dihexyl-9H-fluorene-2,7-diyl)-1,2-ethenediyl-1,4-phenylene-1,2-ethenediyl] (LaPPS16) as a guest. The PnMAs/LaPSS16 blends presented high homogeneity and photoemission temperature stability (T∼30–410 K). Moreover, the PnMA/LaPPS16 blends photoemission in function of sample temperature allowed access to the PnMA molecular relaxations temperatures. This was possible due to the strong interaction between the PnMA n -alkyl side groups and the LaPPS16 aliphatic groups. In addition, the blends films were characterized by Wide-angle X-ray Diffraction, optical absorbance, steady-state photoluminescence spectroscopy, Emission Ellipsometry, and Dynamic Mechanical Analysis. |
| Databáze: | OpenAIRE |
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