Aryl-bridged 1-hydroxypyridin-2-one: Sensitizer ligands for Eu(III)
Aryl-bridged 1-hydroxypyridin-2-one: Sensitizer ligands for Eu(III)
复制标题
DOI：
10.1021/ic8003189
复制
发表时间：
2008-07-21
影响因子：
4.6
通讯作者：
Raymond, Kenneth N.
中科院分区：
文献类型：
--
作者：
D'Aleo, Anthony;Xu, Jide;Raymond, Kenneth N.
本文报道了一个芳基桥联的1-羟基吡啶-2-酮与Eu（III）配合物的合成、晶体结构、溶液稳定性和物理性质。结果表明，该骨架单元增加了随后的络合物的刚性，并且还增加了配体的共轭。作为后者的结果，单重吸收能量降低，沿着的最低激发三重态的能量，所得到的敏化效率为Eu（III）离子的影响，这些现象，产生的总量子产率为6.2%的水溶液中。从发光数据所产生的动力学参数揭示了一个增强的非辐射衰减速率为这种化合物相比，以前报道的脂肪族桥梁。
The synthesis, crystal structure, solution stability, and photophysical properties of an aryl group bridging two 1-hydroxypyridin-2-one units complexed to Eu(III) are reported. The results show that this backbone unit increases the rigidity of the ensuing complex, and also the conjugation of the ligand. As a result of the latter, the singlet absorption energy is decreased, along with the energy of the lowest excited triplet state, The resulting efficiency of sensitization for the Eu(III) ion is influenced by these phenomena, yielding an overall quantum yield of 6.2% in aqueous solution. The kinetic parameters arising from the luminescence data reveal an enhanced nonradiative decay rate for this compound when compared to previously reported aliphatic bridges.