Pf/clay hybrid materials: a simple method to modulate the optical properties

Pf/clay hybrid materials: a simple method to modulate the optical properties

Author Chen Em, Marcio Chao Autor UNIFESP Google Scholar
Barbosa, Camila Gouveia Autor UNIFESP Google Scholar
Peres, Laura Oliveira Autor UNIFESP Google Scholar
Faez, Roselena Google Scholar
Abstract The aim of this work was modulate the emission properties and improve thermal stability of a conjugated polymer incorporated into an inorganic matrix. Hybrid material was prepared based on poly(9,9-dioctylfluorene-co-phenylene (PF) and montmorillonite (Na(+)Mt) clay using wet impregnation of 10, 30 and 50 wt.% of PF into Na(+)Mt and Na(+)Mt intercalated with ammonium quaternary salts (hexadecyltrimethylammonium - HDTMA) in a different proportions (OMt-1 and OMt-2). The materials were characterized by infrared and UV-Vis spectroscopy, fluorescence, X-ray diffratometry and thermogravimetry analysis. The results show that the presence of the clay alters the photoluminescent and thermal properties. Nevertheless, the degree of the clay organophilization and the clay content influences the luminescent properties due to the diverse interaction behavior between the polymer and clay. The sodium clay acted only as dispersing agent since no intercalation process occurs and the emission displacement is assigned to this behavior. In this case the PF emission displace from 402 to 395 nm. A nonlinear displacement is observed for PF/OMt-2 due the difficulties to conclude if the intercalation of the polymer occurs (379, 403 and 412 for hybrid with 10, 30 and 50%, respectively). For PF/OMt-1 a higher displacements for lower wavelength is observed due to intercalation of polymer chains and subsequent isolation in the interlamellar space, especially with material with 10 and 30% of PF in the hybrid material, whose displacement reached to 360 nm. All these results show that is possible to try to control the emission of the conjugated hybrid material changing the rate of the material.
Keywords Polyfluorene
Clay
Hybrid Materials
PhotoluminescenceEnhanced Quantum Efficiency
Light-Emitting Devices
Silicate Nanocomposite
Conjugated Polymer
Fluorenyl Groups
Nanoparticles
Copolymers
Emission
Photoluminescence
Montmorillonite
Language English
Sponsor FAPESP [07/50742-2]
CNPq
Capes-nBioNet
INEO-INCT (National Institute of Science and Technology for Organic Electronics)
Grant number The authors thank FAPESP (07/50742-2), CNPq, Capes-nBioNet and INEO-INCT (National Institute of Science and Technology for Organic Electronics) for financial support. The authors also thank Prof. Dr. Marcos Augusto Bizeto and Prof. Dr. Tereza da Silva Martins for DRX analysis.
Date 2016
Published in Polimeros-Ciencia E Tecnologia. Sao carlos, v. 26, n. 1, p. 38-43, 2016.
ISSN 0104-1428 (Sherpa/Romeo, impact factor)
Publisher Assoc brasil polimeros
Extent 38-43
Origin http://dx.doi.org/10.1590/0104-1428.1808
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000376023600006
SciELO ID S0104-14282016000100006 (statistics in SciELO)
URI http://repositorio.unifesp.br/handle/11600/49509

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