“Cymothoe sangaris”:  An Extremely Stable and Highly Luminescent 1,2-Hydroxypyridinonate Chelate of Eu(III)

• Published in: Journal of the American Chemical Society Vol. 128; no. 33; pp. 10648 - 10649
• Main Authors: Moore, Evan G, Xu, Jide, Jocher, Christoph J, Werner, Eric J, Raymond, Kenneth N
• Format: Journal Article
• Language: English
• Published: WASHINGTON American Chemical Society 23.08.2006; Amer Chemical Soc
• Subjects: Chelating Agents - chemistry; Chemistry; Chemistry, Multidisciplinary; Europium - chemistry; Exact sciences and technology; General and physical chemistry; Heterocyclic compounds; Heterocyclic compounds with only one n hetero atom and condensed derivatives; Luminescence; Luminescent Agents - chemistry; Organic chemistry; Physical Sciences; Preparations and properties; Science & Technology; Spectrophotometry, Atomic; EUROPIUM; ENERGY; EU3; MOLECULE; COMPLEXES; SENSITIVITY; AGENTS; Chelation; Pyridone derivatives; Luminescent material; Nitrogen heterocycle; Europium III; Pyridine derivatives
• ISSN: 0002-7863; 1520-5126
• DOI: 10.1021/ja062597+

The synthesis, structure, and characterization of a new class of luminescent agents based on the 1,2-hydroxypyridinone chelator are reported. The prototype complex, [Eu(5LIO-1,2-HOPO)2]-, demonstrates superb aqueous stability [pEu = 18.64(10)] and is highly emissive [Φt = 0.21(3)], emitting almost pure “red” light (λem = 612 nm). The crystal structure reveals a coordination geometry reminiscent of a “butterfly”, hence the soubriquet of “Cymothoe sangaris” to identify with the unique species of red butterfly found only in Central Africa.