A Spiropyran‐Based Ensemble for Visual Recognition and Quantification of Cysteine and Homocysteine at Physiological Levels

Abstract

Isomerization of the ligand, followed by cooperative metal–ligand interactions leads to the ternary ensemble shown on the right, which has potential for the recognition and quantification of cysteine and homocysteine. The free ligand (left) is red-violet in solution, but when metal ions and cysteine or homocysteine are simultaneously introduced, the solution turns yellow. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2006/z600112_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.