Synthesis and Nonlinear Optical Properties of a Novel Polyester Containing Tricyanovinylthienyl Group

• Published in: Molecular Crystals and Liquid Crystals Vol. 520; no. 1; pp. 186/[462] - 192/[468]
• Main Authors: No, Hyo Jin, Lee, Ga-Young, Cho, You Jin, Lee, Ju-Yeon
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis Group 01.01.2010; Taylor & Francis Ltd
• Subjects: Chemical synthesis; Coefficients; Decay; Devices; Differential scanning calorimetry (DSC); Liquid crystals; NLO; Nonlinearity; Optics; polyester; Polyester resins; Polyesters; Polymer films; Polymer solubility; Polymers; relaxation of dipole alignment; SHG coefficient; Solvents; Thermal stability; thermogravimetric analysis (TGA)
• ISSN: 1542-1406; 1563-5287; 1527-1943
• DOI: 10.1080/15421400903584390

A novel T-type polyester (7) containing 1-(2,5-dioxyphenyl)-2-{5-(1,2,2-tricyanovinyl)-2-thienyl}ethene groups as NLO-chromophores was synthesized and characterized. Polymer 7 was soluble in common organic solvents such as DMF and DMSO. It showed thermal stability up to 300°C in TGA with T g value obtained from DSC near 113°C. The second harmonic generation (SHG) coefficient (d 33 ) of poled polymer film at the 1560 nm fundamental wavelength was around 4.42 × 10 −9  esu. The dipole alignment exhibited a greater thermal stability even at 10°C higher than T g , and there was no SHG decay below 125°C due to the partial main-chain character of the polymer structure, which is acceptable for nonlinear optical device applications.