Add time:07/15/2019         Source:sciencedirect.com

Poly(2-methoxy-5-(2-(4-nitrophenyl)ethenyl)-1,4-phenylenevinylene) (PMNEPV) and a series of copolymers (poly(MNEPV-co-PV)) containing varying amounts of 1,4-phenylenevinylene (PV) units have been synthesized via soluble precursor polyelectrolytes. These polymers possess a unique structural feature in which the electron-donating methoxy groups are located on the phenylene rings along the main chain whereas the electron-attracting nitro groups are attached to the side chain styryl substituents. The u.v.-vis. spectra of PMNEPV and the poly(MNEPV-co-PV)s revealed two major absorptions arising from π-π* transitions of the two π-electron systems: the first peak is due to the π-system in the 4-methoxy-4′-nitrostilbene moiety and the second due to the π-system in the backbone. The maximum electrical conductivity of FeCl3- or I2-doped copolymers increased rapidly initially with the level of MNEPV unit followed by a gradual decrease when the content of MNEPV unit was > 7 mol%. The dependence of the electrical conductivity of the present series of copolymers, when doped either with I2 or FeCl3, is almost the same as that observed earlier by us for poly(2-methoxy-5-(2-phenylethenyl)-1,4-phenylenevinylene) and its copolymers containing the PV unit.

We also recommend Trading Suppliers and Manufacturers of N-(2-methoxy-4-nitrophenyl)-3-phenylpropanamide (cas 6613-04-3). Pls Click Website Link as below: cas 6613-04-3 suppliers