Metal-Controlled Diastereoselective Self-Assembly and Circularly Polarized Luminescence of a Chiral Heptanuclear Europium Wheel

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• 作者：G眉lay Bozoklu ; Christelle Gateau ; Daniel Imbert ; Jacques P茅caut ; Koen Robeyns ; Yaroslav Filinchuk ; Farah Memon ; Gilles Muller ; Marinella Mazzanti
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：May 23, 2012
• 年：2012
• 卷：134
• 期：20
• 页码：8372-8375
• 全文大小：282K
• 年卷期：v.134,no.20(May 23, 2012)
• ISSN：1520-5126

文摘

The chiral dissymmetric tetradentate ligand (S)-6鈥?(4-phenyloxazolin-2-yl)-2,2鈥?bipyridine-6-carboxylate (S-Phbipox) leads to the diastereoselective assembly of a homochiral Eu³⁺ triangle and a highly emissive (quantum yield = 27%) heptanuclear wheel that is the largest example of a chiral luminescent complex of Eu³⁺ reported to date. The nuclearity of the assembly is controlled by the solvent and the Eu³⁺ cation. All of the compounds show large circularly polarized luminescence with an activity that varies with the nature of the assembly (highest for the homochiral trimer).