A comparative study of iodine and acids-doped co-polymer derived from Poly-Phenylene-Vinylene

B. Zaidi1, S. Ayachi1, A. Mabrouk1, M. Ghedira1 P. Molinié3, M. Majdoub2, K. Alimi1*

1Laboratoire des Matériaux, Faculté des Sciences de Monastir, 5000 Monastir, Tunisia

2Laboratoire des polymères et des membranes, Faculté des Sciences de Monastir, 5000 Monastir, Tunisia

3Institut des Matériaux Jean Rouxel, CNRS-UMR 6502, 2 Rue de la houssinière,

B.P 32229, 44322 Nantes cédex 3, France

* Corresponding author. E-mail : kamel.alimi@fsm.rnu.tn

Received : 09 May 2002; revised version accepted : 18 February 2003

Abstract

In this paper the new co-polymer, referred to as PPV-ether is built as PPV polymer with some conjugated links (-CH=CH-) that are changed into ethylic-ether links (-CH2-O-CH2-). The PPV-ether is doped with oganic (CH3SO3H) or inorganic(H2SO4) acids or iodine. The infrared absorption (IR), optical density (OD), X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) show that there is a charge transfer (CT) complex formed between the co-polymer and the doping species (iodine or acids dopants). From IR, XPS and ESR analysis, we deduced that the doping mechanism of the co-polymer is respectively a protonation of the double links in PPV in the case of the protonic acid doping process and a grafting of the iodine to the ether links in the case of iodine doping process.

Keywords: PPV; Charge Transfert; Protonation; Acid; ESR.

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