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Communication | Special issue | Vol 72, No. 1, 2007, pp.85-90
Published online, 3rd October, 2006
DOI: 10.3987/COM-06-S(K)4
Synthesis and Properties of Acene Dimers Linked by a 1,3,4-Oxadiazole Spacer

Katsuhiko Ono,* Mayuko Wakida, Ryohei Hosokawa, Katsuhiro Saito, Jun-ichi Nishida, and Yoshiro Yamashita

*Department of Life and Material Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

Abstract

Acene dimers linked by a 1,3,4-oxadiazole spacer were synthesized and their physical, optical, and electrochemical properties were investigated. The melting points and electron affinities of the dimers increased in the following order: benzene, naphthalene, and anthracene. The longest absorption maximum was red-shifted with an increase in the number of benzene rings. The π-conjugation between the two acene moieties through the oxadiazole spacer was not strong. Although no OFET properties were observed in a bottom contact device using the anthracene dimer as an active layer, the molecules were perpendicularly arranged on the substrate to form π-stacking films as observed in the X-Ray diffraction analysis.