IT Convergence Technology Research Laboratory, Electronics and Telecommunications Research Institute (ETRI), Daejeon, 305-700, Korea.
Dalton Trans. 2010 Feb 14;39(6):1532-8. doi: 10.1039/b915893f. Epub 2009 Dec 14.
Lanthanide complexes with two push-pull diketone derivatives as sensitizers have been developed as synthons for near-infrared emitting materials. The ligand substituents consist of a carbazole moiety with hole-transport properties and an aromatic or heteroaromatic unit. According to quantitative NMR analysis and complementary HPLC experiments, the diketones are predominantly in their enolic form in polar solvents such as THF and MeCN at room temperature. The preferred cis-enol form contributes strongly to the binding of lanthanide ions (Ln = Nd, Gd, Er). The resulting tris(diketonate) ternary complexes with terpyridine (Ln = Nd, Er) display sizeable near-IR emission with long luminescence lifetimes.
已开发出具有两个推拉二酮衍生物作为敏化剂的镧系元素配合物作为近红外发光材料的合成子。配体取代基由具有空穴传输性能的咔唑部分和芳基或杂芳基单元组成。根据定量 NMR 分析和互补 HPLC 实验，在室温下，二酮在极性溶剂如 THF 和 MeCN 中主要以烯醇形式存在。首选的顺式烯醇形式强烈有助于镧系离子（Ln = Nd、Gd、Er）的结合。与三吡啶（Ln = Nd、Er）形成的三元配合物具有较大的近红外发射和较长的荧光寿命。
