Preparation and characteristics of perfluorodiacetylene Langmuir–Blodgett films

• Published in: Polymer (Guilford) Vol. 39; no. 24; pp. 5889 - 5892
• Main Authors: Terasawa, Naohiro, Hayakawa, Yoshio, Fukaya, Haruhiko, Hayashi, Eiji, Kato, Katsuya, Fujii, Shozo, Sawada, Hideo, Li, Kyonho, Kyokane, Jun
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.11.1998; Elsevier
• Subjects: Applied sciences; diacetylene LB film; electroconductivity; Exact sciences and technology; Physicochemistry of polymers; Polymerization; Polymers and radiations; water repellency; diacetylene LB film; water repellency; electroconductivity; Electrical conductivity; Electrical properties; Organic perhalocompound; Fluorine containing polymer; Diacetylene polymer; Air water interface; Experimental study; Conducting polymers; Conjugated polymer; Molecular orientation; Photopolymerization; Preparation; Langmuir Blodgett layer; Interface reaction; Monomer
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/S0032-3861(98)00150-5

The surface pressure–area curve for the novel perfluorodiacetylene, C 24F 42, showed that a monolayer was formed on the surface of the water. The monolayer was deposited on KRS-5, Al and quartz plates by the Langmuir–Blodgett (LB) technique. The LB film on the KRS-5 plate showed excellent water repellency with a contact angle of 162°. Comparison of the reflection–absorption and transmission i.r. spectra showed that the difluoromethylene chains in the C 24F 42 LB film were oriented perpendicular to the substrate surface. The C 24F 42 LB film on the quartz plate was polymerized by u.v. irradiation giving a highly electroconductive film without doping or further treatment.