Abstract
Films of conjugated carbyne-like system was obtained by dehydrochlorination of poly(vinylidene chloride) (PVDC) by the two step treatments with 1,8-diazabicyclo [5,4,0]undec-7-ene (DBU). Amorphous region of PVDC was dehydrochlorinated in the proper swelling solution at the first step treatment and the crystalline region was treated in the pure solvent at the second step, so that the film shape was kept after the whole treatments. Two characteristic IR absorption bands were observed at ca. 2000 and ca. 1650 cm−1 which are assigned to stretching vibration of polyyne structure (VC=C) and that of polyene structure (VC=C), respectively. The intensity of VC=C decreased with time upon storage even under the inert atmosphere.
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