Synthesis and Physical Properties of Ferrocene Derivatives (XXII): Monosubstituted Ferrocene Derivatives Containing Biphenyl Group in the Mesogenic One

Abstract

The monosubstituted ferrocene derivatives containing biphenyl group in mesogenic one, ω-[4-(4-methoxybiphenoxy carbonyl) phenoxycarbonyl] alkyl 4-ferrocenylbenzoate, have been synthesized by changing the carbon atoms number of the flexible spacer. The analogous compounds in which phenyl group was contained instead of biphenyl one have been prepared and reported previously. Their phase transition behavior has been studied by a differential scanning calorimeter and a polarizing microscope. The effect of an existence of the biphenyl group on their phase transition behavior and a comparison of the phase transition phenomena with that of ω-[4-(4-methoxyphenoxy carbonyl) phenoxycarbonyl] alkyl 4-ferrocenylbenzoate will be discussed.

Keywords:

• Crystal structure
• ferrocene
• liquid crystal
• metallomesogen
• monosubstituted ferrocene derivative

A High-Tech Research Center Project for Private Universities matching fund subsidy from MEXT (Ministry of Education, Culture, Sports, Science and Technology), 2006–2010 is gratefully acknowledged for partial financial support of the present work. We are grateful to Associat Prof. T. Hanasaki and Dr. K. Uno, Ritsumeikan University, Japan, for useful discussion.

Notes

∗Present address: Molex Japan Co., Ltd., 1-5-4, Fukami-Higashi, Yamato, Kanagawa 242-8585, Japan.

∗∗Present address: Showa Inc Manufacturing Co., Ltd., 1063, Kohji, Konan, Koka, Shiga 520-3306, Japan.