Controlling photo-oxidation processes of a polyfluorene derivative: The effect of additives and mechanism

Author(s)

Ferreira, G. R. ^[1] ; Nowacki, B. ^[2] ; Magalhaes, A. ^[3] ; deAzevedo, E. R. ^[4] ; de Sa, E. L. ^[5] ; Akcelrud, L. C. ^[2] ; Bianchi, R. F. ^[1]

Affiliation

^[1] Lab Polymers & Elect Properties Mat UFOP, Ouro Preto, MG - Brazil

^[2] Paulo Scarpa Polymer Lab UFPR, Curitiba, Parana - Brazil

^[3] Univ Estadual Campinas, Inst Quim, UNICAMP, Campinas, SP - Brazil

^[4] Univ Sao Paulo, USP, Inst Fis Sao Carlos, Sao Carlos, SP - Brazil

^[5] Univ Fed Parana, Dept Chem, BR-80060000 Curitiba, Parana - Brazil

• Document type: Journal article
• Source: Materials Chemistry and Physics; v. 146, n. 3, p. 212-217, AUG 14 2014.
• Web of Science Citations: 2

Abstract

The control of the photo degradation of a fluorene-vinylene-phenylene based-polymer, poly(9,9-di-hexylfluorenediylvinylene-alt-1,4-phenylenevinylene) (LaPPS16) was achieved by addition of a radical scavenger (RS) (enhancing photo resistance) or a radical initiator (RI) (reducing photo resistance). Photoluminescence, UV-Vis absorption, H-1 NMR spectroscopies and gel permeation chromatography (GPC) revealed that the incorporating small amounts of RS or RI is an efficient way to control the rates of the photo-oxidation reactions, and thus to obtain the conjugated polymer with foreseeable degradation rates for applications in blue-light sensitive detectors for neonatal phototherapy. (C) 2014 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 09/18354-8 - Dynamics and structure of polymer systems as studied by nuclear magnetic resonance
• Grantee: Eduardo Ribeiro de Azevedo
• Support Opportunities: Regular Research Grants