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Prearation and Nonlinear Optical Property of Polydiacetylenes from Unsymmetrical Diphenylbutadiynes with Trifluoromethyl Substituents

1990; Taylor & Francis; Volume: 183; Issue: 1 Linguagem: Inglês

10.1080/15421409008047443

1044-1859

Shuji Okada, Minoru Ohsugi, Atsushi Masaki, Hiro Matsuda, Shigeru Takaragi, Hachiro Nakanishi,

Antimicrobial Peptides and Activities

Abstract In order to obtain the polydiacetylenes having π-conjugation between polymer backbone and side chains, many of unsymmetrical diphenylbutadiyne derivatives with trifluoromethyl substituents on one of the phenyl rings have been synthesized. Among them, 1-(3-(methylamino) phenyl)-4-(3, 5-bis (trifluoromethyl)-phenyl) butadiyne (MADF) was found to be topochemically polymerized with complete conversion into the polymer single crystals. Spectroscopies and X-ray crystal structure analysis revealed that the π-conjugation of this polymer are more extended than those of the so-far prepared poly(diphenylbutadiyne)s, with smaller dihedral angles between π-conjugation planes of polymer backbone and phenyl rings. The extended π-conjugation was also confirmed by larger X(3) values.