镧系元素
齿合度
化学
芳基
发光
配体(生物化学)
分子
离子
无机化学
光化学
结晶学
材料科学
晶体结构
有机化学
受体
生物化学
光电子学
烷基
作者
Steven W. Magennis,Simon Parsons,Zoe Pikramenou
标识
DOI:10.1002/1521-3765(20021216)8:24<5761::aid-chem5761>3.0.co;2-h
摘要
Luminescent lanthanide complexes have been developed, based on the assembly of bulky ligands around the lanthanide ion, to provide shell-type protection of the ion from coordinated solvent molecules. Aryl-functionalised imidodiphosphinate ligands (tpip and Metpip) provide a bidentate anionic site that leads to hexa-coordinate lanthanide complexes in which the aryl groups surround the ion. There are twelve phenyl groups around the lanthanide that act as "remote" (from the binding site) sensitisers for the metal ion. It is shown that these ligands are suitable for sensitising luminescence for all the lanthanides that emit in the visible range, namely, SmIII, EuIII, TbIII, DyIII. A "builtin" shield on the ligand is designed to provide a complete block of the approach of water to the lanthanide ion. The synthesis of the ligands and their lanthanides complexes as well as detailed photophysical studies of the complexes in solution and in the solid-state are presented.
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