New confined p-phenylenevinylene (PPV)-type polymer analogue of poly(phenylene sulfide)

Poly(phenylenevinylenes)

“…Using a saturated carbon chain to isolate chromophore has been proven to be a reliable strategy to confine the conjugated segment into a well-defined length as well as morphology, leading to 34 (X=H) as one of the best blue-emitting materials [67]. In analogy, silicon [70], germanium [71], and sulfur [72] have been incorporated into the main chain of PPV to confine the conjugated segments and to influence the emission properties of the respective materials. The Wittig reaction has also been used to incorporate the ortho-phenylene linkage in PPVs [58,73].…”

Effect of the side-chain size on the optical and electrical properties of confined-PPV derivatives

“…The results indicate a more important p-p interaction of PPV systems in P1 film, which presents lower E g [27]. In the case of P2 and P3, this type of interaction is limited by increasing the length of the side chain.…”

New anthracene-based semi-conducting polymer analogue of poly(phenylene sulfide): Synthesis and photophysical properties

“…The optical gap (E g-op ) was estimated from the absorption-onset of the PAnS film and was of 2.56 eV. In comparison with our previously reported PPS-analogue based on the distyrylbenzene chromophore units (PPVS) [30], the PAnS showed a lower optical gap indicating a higher effective conjugation length in the polymer film.…”

“…The correspondent triphenylphosphonium salts (M 2 ) was then obtained by acetone reflux of the AnCl in presence of triphenylphosphine. The polymer (PAnS) was synthesized via the Wittig reaction by condensing the M 2 with the dialdehyde M 1 , according to a previously reported procedure using the t-BuOK/THF system (Scheme 2) [30]. The obtained polymer was found to have good solubility in common organic solvents such as tetrahydrofuran, chloroform and methylene chloride.…”