2,5‐Thienylene‐Bridged Triangular and Linear Porphyrin Trimers

Abstract

A question of shape: Palladium-catalyzed cross-coupling of borylporphyrins has led to the synthesis of a β-to-β thienylene-bridged porphyrin dimer and two types of trimer (see picture; gray C; white H, pink Ni, yellow S, blue N). The ladderlike trimer exhibits a very large two-photon absorption cross-section (17 300 GM) at 800 nm, while that of the triangular trimer is moderate in comparison (8600 GM). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z802026_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.