Two Isomeric Triple-Layered Tetrathiafulvalenophanes: Syntheses, Structures, and Electrochemical Properties

✍ Scribed by Shin-ichi Yunoki; Kazuo Takimiya; Yoshio Aso; Tetsuo Otsubo*

• Publisher: Elsevier Science
• Year: 1997
• Tongue: French
• Weight: 564 KB
• Volume: 38
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(97)00523-6

✦ Synopsis

The first triple-layered tetraifriaftdvalenophanes of twodifferent stackingtypeshavebeen synthesized andcharacterized withcyclicvoltammetry. Inaddition, thestructureof an isomerof the parallel-oncnted typewaaelucidated byanX-raycrystalanalysis.@ 1997Elsevier Science Ltd.

Much effort in the field of recent organic conductors has been devoted to the development of novel tetrathiafulvalenophanes in which the two TTF units are stacked by two or more bndges.l-s Such dimeric 'ITF phanes with different linkage modes have the advantage of controlling the stoichiometry and dimensionality of their conductive molecular complexes.6 Among them, the simple double-bridged 'ITF phanes 11 and 22 have turned out to be the best electron donors forming highly conductive molecular complexes, though these compounds consist of a mixture of the cis and trans isomers as well as the syn and anti flexible conformers concerning the mutual positions of the TTF units. Thus, multi-layered TTF phanes are probably a more interesting system, because all the TIT units might take an interactive conformation. However, more than double-layered TIT phanes have been so far unknown, though macrocyclic cage molecules surrounded by three ITF bridges were recently reported.7 Here we describe the syntheses, structures, and electrochemical properties of two isomeric triple-layered ITF phanes 3 and 4.