209159-69-3Relevant academic research and scientific papers
Synthesis and properties of novel nonlinear optical polyester containing carbomethoxycyanovinylnitrocatecholic group
Kim, Jung-Eun,Lee, Ju-Yeon
, p. 77 - 83 (2017)
A new X-type polyester 5 containing 4-(2′-carbomethoxy-2′-cyano)vinyl-5-nitrocatecholic groups as nonlinear optical (NLO) chromophores, which are parts of the polymer backbone, was prepared and studied its properties. Polyester 5 is soluble in common organic solvents such as acetone and dimethylsulfoxide. Polymer 5 shows a thermal stability up to 280°C from thermogravimetric analysis with glass-transition temperature (Tg) obtained from differential scanning calorimetry of near 110°C. The second harmonic generation (SHG) coefficient (d33) of poled polymer 5 film at the 1064?nm fundamental wavelength is 6.13 × 10?9 esu. The dipole alignment of polymer 5 exhibits a thermal stability up to Tg, and no significant SHG decay is observed below 110°C due to the partial main-chain character of polymer structure, which is acceptable for NLO device applications.
Synthesis of novel Y-type nonlinear optical polyester with enhanced thermal stability of second harmonic generation for electro-optic applications
Cho, You Jin,Lee, Ju-Suk,Lee, Ju-Yeon
experimental part, p. 1509 - 1514 (2010/10/19)
Methyl 3,4-di-(2'-hydroxyethoxy)benzylidenecyanoacetate (3) was prepared and condensed with terephthaloyl chloride to yield novel Y-type polyester (4) containing 3,4-dioxybenzylidenecyanoacetate groups as NLO-chromophores, which constituted parts of the polymer main chains. The resulting polymer 4 is soluble in common organic solvents such as acetone and A-dimelhylformarnide. Polymer 4 shows thermal stability up to 280 °C in thermogravimetric analysis with glass-transition temperature obtained from differential scanning calorimetry near 105 °C. The second harmonic generation (SHG) coefficient of poled polymer films at the 1064 nm fundamental wavelength is around 2.42 pm/V. The dipole alignment exhibits high thermal stability up to near Tg, and there is no SHG decay below 100 °C due to the partial main-chain character of polymer structure, which is acceptable for NLO device applications.
