Synthesis and characterization of NLO chromophores bearing poly(1,6-heptadiyne)s for electro-optic application

✍ Scribed by Hyung-Jong Lee; Yong Hyub Won; Su-Jin Kang; Sam-Kwon Choi; Hwan Kyu Kim

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 594 KB
• Volume: 34
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19960915)34:12<2333::aid-pola7>3.0.co;2-x

✦ Synopsis

We utilized the metathesis reaction to synthesize a new type of multifunctional polymer that contains a conjugated backbone and a second-order NLO chromophore as a pendant group. The 1,6-heptadiyne derivatives bearing NLO chromophores were easily polymerized by using a metathesis catalyst to give corresponding polymers with large optical nonlinearities. Molecular structural characterizations for the resulting polymers were achieved by 'Hand 13C-NMR, FTIR, and UV-visible spectroscopies. Soluble polymers were obtained up to 72 mol % of chromophore monomer portion in the copolymer. These amorphous polymers exhibited good film-forming abilities and thermal stability. The electro-optic coefficient, r33, of the poled polymer films was in the range of 0.5-10.1 pm/V, and the nonresonant values of the third-order NLO coefficient, X'3' was found to be about lo-" esu.