Synthesis and Characterization of Nonlinear Optical Polymers Containing Carbazole and Disperse Red Dye

Abstract

Dye-containing nonlinear optical (NLO) polymers were synthesized: (1) poly(3-(2-(3-(2-isocyanatopropan-2-yl)phenyl)-2-methylpropyl)-4-methyl-1-phenylpyrrolidine-2, 5-dione), P[(DR1,Cz)MSt-PMI], and (2) poly(9-vinyl-9H-carbazole-co-disperse red 1), PAV[DR1-Cz]. The synthesized NLO polymers were characterized by 1 H-NMR, IR, and UV -VIS spectroscopy; differential scanning calorimetry (DSC); and thermogravimetric analysis (TGA). The electro-optic (EO) coefficients (r 33 ) and their NLO properties were evaluated by simple reflection and the Maker fringe method. The EO coefficients of P[(DR1,Cz)MSt-PMI] and PAV[DR1-Cz] were measured at 632.8 nm to be 106 and 46.6 pm/V, respectively. The second harmonic generation (SHG) coefficient (d 33 ) of P[(DR1,Cz)MSt-PMI] was measured to be 71.25 pm/V.

Facile Synthetic Route Toward High Conversion Primary Aliphatic Poly(vinyl benzyl isocyanate) via Iodination

“…Measurements 1 H NMR spectra were taken on a Varian Gemini-200 FT NMR spectrometer using CDCl 3 and DMSO-d 6 . IR measurements were performed on a Perkin-Elmer Spectrum One FT-IR spectrometer.…”

“…[1][2][3][4][5][6] However, the TMI monomers do not polymerize to any significant extent via free radical bulk homopolymerization, as addressed by Leonie et al 7 The reluctance of TMI monomers to homopolymerize is due to the presence of -methyl group, which causes significant steric hindrance resulting in a substantial reduction of propagation rate coefficient, k p ((60 C, styrene) = 340 L mol À1 s À1 and k p (-methyl styrene) = 2.61 L mol À1 s À1 ). It is concluded that the TMI monomers are not suitable for synthesizing homopolmers or block copolymers.…”