New NLO-functionalized poly(1,4-phenylenevinylene) derivative containing dinitrobenzene moiety as electron acceptor

New NLO-functionalized poly(1,4-phenylenevinylene) (PDNAPV) containing 2,4-dinitroanilino group, was synthesized through organic-soluble precursor pathway. The prepared polymer was characterized with NMR, FT-IR, UV-visible and other spectroscopic methods to identify its properties. The result from the thermal analyses and spectroscopic techniques showed that the precursor was converted into PDNAPV around at 200°C without any decomposition of 2,4-dinitroanilino group. The second-order NLO coefficient (χ⁽²⁾) of poled PDNAPV film was determined by second-harmonic generation technique. The resonant χ⁽²⁾ value was 26 pm/V and the resonance-corrected value (χ⁽²⁾(0)) was 12 pm/V, which was stable at room temperature for a month.