Choi, DH Ahn, JS Kim, N 2024-01-21T19:04:32Z 2024-01-21T19:04:32Z 2021-09-05 1997-01 0379-153X https://pubs.kist.re.kr/handle/201004/144149 We synthesized alpha-methylstyrene copolymers bearing the two different organic salt type chromophores and investigated their second-order nonlinear optical properties using the linear electro-optic(EO) coefficient measurement and second harmonic generation (SHG). In the synthesis of copolymers, N-vinylcarbazole or p-hydroxyphenylmaleimide were employed as a comonomer. In the synthesis of organic salt type chromophore, pyridinium and quinolinium were selected as cationic species and tetraphenylboron was selected as a counterion. In the case of p-hydroxyphenylmaleimide copolymer, we made an attempt to induce thermal crosslinking reaction utilizing diisocyanate. Crosslinking reaction via tetramethylene-m-xylidene diisocyanate was traced by virtue of infrared spectroscopy. The stability of second-order nonlinear optic property was also observed. Korean POLYMER SOC KOREA 2ND-HARMONIC GENERATION Synthesis and nonlinear optical effects of alpha-methylstyrene copolymers bearing the pyridinium and quinolinium salt chromophore Article 1 POLYMER-KOREA, v.21, no.1, pp.125 - 133 POLYMER-KOREA 21 1 125 133 scie scopus A1997XB54100015 2-s2.0-23744484592 Polymer Science Polymer Science Article 2ND-HARMONIC GENERATION nonlinear optics second harmonic generation electro-optics molecular ionic chromophore crosslink