Synthesis 2005(16): 2772-2776  
DOI: 10.1055/s-2005-872104
PAPER
© Georg Thieme Verlag Stuttgart · New York

Synthesis and Electrochemical Properties of [2]Rotaxanes with meta-Terphenyl and meta-Terphenyl-Capped Dendritic Stoppers

Kannupal Srinivasan, Perumal Rajakumar*
Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai-600 025, Tamil Nadu, India
Fax: +91(44)22352494; e-Mail: perumalrajkumar2003@yahoo.co.in;
Further Information

Publication History

Received 20 January 2005
Publication Date:
04 August 2005 (online)

Abstract

A meta-terphenyl moiety has been employed as a stopper in a Stoddart-type [2]rotaxane, which is formed in a remarkably high yield due to the additional templating effect of the stoppers. Making use of the recognition between bis(pyridinium)ethane and dibenzo-24-crown-8 ether, the [2]rotaxanes with m-terphenyl and m-terphenyl-capped dendritic stoppers have been synthesized by a threading procedure. The [2]rotaxane 7 displays two bielectronic redox waves while the [2]rotaxanes 10 and 11 show four distinct monoelectronic redox waves.