Synthesis and Light‐Emitting Characteristics of Doughnut‐Shaped π‐Electron Systems

Abstract

Doughnut-shaped fluorescent molecules: Highly symmetrical, functionally and structurally interesting octakis-m-cyclynes 1 and octakis-p-cyclynes 2 are shown to be a new class of light-emitting materials (see scheme). A pentacoordinate CuII complex of 1 exhibits remarkably intense fluorescence, contrary to the behavior expected for CuII complexes, which suggests that other transition-metal complexes of 1 may also function as luminescent materials. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2004/z52749_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.