T. Moustafid, S. Aeiyach, J. Aaron
1991
Citations
0
Influential Citations
20
Citations
Journal
Polymer
Abstract
Abstract Polymers of 1-methoxy-4-ethoxybenzene (PMEP), 1-methoxy-4-n-hexoxybenzene (PMHP) and 1-methoxy-4-[2-(1-adamantyl)-2-oxo-ethoxy]benzene (PMAP) were electrosynthesized in 0.1 M tetrabutylammonium tetrafluoroborate acetonitrile solution and characterized. While PMEP is practically insoluble, PMHP and PMAP are soluble in usual organic solvents such as methylene chloride, chloroform, carbon tetrachloride, tetrahydrofuran and dimethylformamide. Structural characterization using Fourier transform infra-red and nuclear magnetic resonance spectroscopy indicates that these polymers have a linear and well-defined polymeric structure. Gel permeation chromatography studies show number average molecular weights between 2200 and 2900 with degrees of polymerization between 10 and 11 for PMHP and PMAP. Electrical conductivities range between 2 × 10−5 S cm−1 and 2 × 10−2 S cm−1 for PMEP, PMHP and PMAP in the oxidized state. Ultraviolet absorption, excitation and emission fluorescence spectra were measured for the polymers in solution and for solid films. The red shift ( ⋍0.70 eV ) of the fluorescence emission maximum of the polymers (peak at ∼3.10 eV) relative to the monomers is discussed in terms of π-electron delocalization and excimer formation. The Stokes shift is consistent with the presence of two exciton-polaron levels for polymers in solution.