Abstract
Two series of OPVs (oligo(phenylenevinylene)), that is, ((1E,1′E)-(2,5-dimethoxy-1,4-phenylene)bis(ethene-2,1-diyl))dibenzene derivatives and 4-((E)-4-((E)-styryl)styryl)pyridine derivatives with different functional groups of varying electronic properties have been synthesized by one-pot Wittig–Heck methodology. The synthesized derivatives have been studied for their optical properties. Amongst them the ((1E,1′E)-(2,5-dimethoxy-1,4-phenylene)bis(ethene-2,1-diyl))dibenzene derivatives with appropriate changes in the end group showed a significant impact on the UV absorption and emission spectra. Particularly NO2–OPV showed distinct solvatochromism in the wavelength range of 218nm in different solvents. Whereas 4-((E)-4-((E)-styryl)styryl)pyridine derivatives showed clear acidochromism which can be detected visually as well as spectroscopically.
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