Poly 2,5-dimethoxy-/>phenylenevinylene

Bum PL, Bradley DDC, Brown AR, Friend RH, Holmes AB. Studies on the efficient synthesis of poly(phenylenevinylene) (PPV) and poly(dimethoxy phenyleneviny-lene) (dimethoxy-PPV). Synth Met 1991 41(1-2) 261. ... 

The application of conjugated polymer films as gas separation membranes has also been described [195-197]. The ability of ECPs to separate mbrtures of gases was related to differences in permeabilities of gases through the polymer films. Provided that the morphology and the porosity of this class of electroactive polymers were precisely controlled after synthesis, a remarkable gas selectivity could be achieved. For PAni investigated in the presence of different gas pairs, selectivity values of 3590 for H2/N2, 30 for O2/N2, and 336 for CO2/CH4 were obtained [195]. It has also been demonstrated that other ECPs such as poly(dimethoxy-p-phenylenevinylene) were appropriate for gas separations [197]. 

P. L. Burn, et al.. Precursor route chemistry and electronic properties of poly(p-phenylenevinylene), poly[(2,5-dimethyl-/ -phenylene)vinylene] and poly-f(2,5-dimethoxy-/ -phenylene)vinylene], J. Chem. Soc. Perkin Trans. 7 3225 (1992). 

The LB films of poly(p-phenylenevinylene) were prepared using a surface active polyion complex precursor [320,321]. Conductivity values of 0.5 S/cm were attained by SO3 doping. Poly(2,5-dimethoxy-p-phenylenevinylene) and poly(2,5-thienylenevinylene) were also fabricated into LB films [322]. 

Preparation of oriented poly(2,5-dimethoxy-p-phenylenevinylene), MOPPV, LB films... 

The reaction proceeds via qifinodimethane intermediates. In general, the reaction is carried out in an aprofic solvent, such as DMF. However, for the preparation of the soluble poly(2,5-dimethoxy-1,4-phenylenevinylene), an undivided flow cell with constant current at a lead cathode and aqueous DMF can be used. 

M3EH-PPV Poly(2-methoxy-5-(2 -ethylhexyloxy)-1,4-phenylene vinylene 2,5-dimethoxy-1,4-phenylenevinylene) [57]... 

Similar results also has been obtained by Swiatkiewicz and co-workers [205] in stretch-oriented films of poly-(2,5-dimethoxy-p-phenylenevinylene) thin films. Also, oriented films of PPV have been fabricated with the LB technique [201]. The value (at A = 1.064/i,m)ofanLBfilmofpoly-... 

S. Tokito, P. Smith, and A. J. Heeger, Highly conductive and stiff fibres of poly(2,5-dimethoxy-p-phenylenevinylene) prepared from soluble precursor polymer. Polymer 52 464 (1991). 

Kaino, T., Kobayashi, H., Kubodera, K., Kurihara, T., Saito, S., Tsutsui, T., and Tokito, S., Optical third-harmonic generation from poly(2,5-dimethoxy p-phenylenevinylene) thin film, Appl. Phys. Lett., 54, 1619, 1989. 

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