Laboratoire de Reconnaissance Ionique et Chimie de Coordination, Service de Chimie Inorganique et Biologique, CEA-Grenoble, INAC, France.
J Am Chem Soc. 2012 May 23;134(20):8372-5. doi: 10.1021/ja3020814. Epub 2012 May 14.
The chiral dissymmetric tetradentate ligand (S)-6'-(4-phenyloxazolin-2-yl)-2,2'-bipyridine-6-carboxylate (S-Phbipox) leads to the diastereoselective assembly of a homochiral Eu(3+) triangle and a highly emissive (quantum yield = 27%) heptanuclear wheel that is the largest example of a chiral luminescent complex of Eu(3+) reported to date. The nuclearity of the assembly is controlled by the solvent and the Eu(3+) 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).
手性不对称四齿配体 (S)-6'-(4-苯恶唑啉-2-基)-2,2'-联吡啶-6-羧酸酯 (S-Phbipox) 导致同手性 Eu(3+) 三角形和高发光 (量子产率 = 27%) 七核轮的非对映选择性组装，这是迄今为止报道的 Eu(3+) 手性发光配合物中最大的例子。组装的核数由溶剂和 Eu(3+) 阳离子控制。所有化合物均表现出大的圆偏振发光，其活性随组装体的性质而变化（同手性三聚体最高）。
