作者:Amanda P. S. Samuel、Jide Xu、Kenneth N. Raymond
DOI:10.1021/ic801904s
日期:2009.1.19
ligand singlet and triplet excited states are found to increase linearly with the π-withdrawing ability of the substituent. The experimental results are supported by time-dependent density functional theory calculations performed on model systems, which predict ligand singlet and triplet energies within ∼5% of the experimental values. The quantum yield (Φ) values of the Tb(III) complexes increase with the
一系列的高度发光铽(III)对位取代的2- hydroxyisophthalamide配体的复合物(5LI-IAM-X)已经制备(X = H,CH 3,(C = O)NHCH 3,SO 3 -,NO 2,OCH 3,F,Cl,Br),以探究取代间苯二甲酰胺环对配体和Tb(III)发射的影响,从而建立预测生色团修饰对Tb(III)发光的影响的方法。发现配体单线态和三线态激发态的能量随取代基的π-吸收能力线性增加。在模型系统上进行的随时间变化的密度泛函理论计算为实验结果提供了支持,该模型可预测配体单线态和三线态能量在实验值的5%左右。Tb(III)配合物的量子产率(Φ)值随配体的三重态能量而增加,这部分是由于三重态的热重聚导致非辐射失活减少所致。一起,