Contribution of Energy Transfer from the Singlet State to the Sensitization of Eu<sup>3+</sup>and Tb<sup>3+</sup>Luminescence by Sulfonylamidophosphates
作者:Ewa Kasprzycka、Victor A. Trush、Vladimir M. Amirkhanov、Lucjan Jerzykiewicz、Oscar L. Malta、Janina Legendziewicz、Paula Gawryszewska
DOI:10.1002/chem.201603767
日期:2017.1.26
evidence suggest a dominant role is played by the ligand first excited singlet state. The importance of the role played by the 7F5 level in the case of the Tb3+ compound in this process is shown. The theoretical approach for the energy transfer rates was successfully applied to the rationalization of the experimental data. The higher‐lying excited levels of Eu (5DJ, 5LJ, 5GJ) and Tb (5DJ, 5GJ, 5LJ, 5HJ,
一系列稳定的镧系元素络合物Na [Ln(L)4 ](Ln = La 3+,Eu 3+,Gd 3+,Tb 3+合成了L =二甲基(4-甲基苯基磺酰基)氨基磷酸酯和二甲基-2-萘磺酰基酰胺基磷酸酯。这些化合物的特征在于在293和77 K时的单晶X射线衍射,IR,吸收和发射光谱。与Ln配合物中分子内能量转移过程中配体三重态的通常和众所周知的显性作用相反,在具有磺酰氨基磷酸酯配体的这一特殊的新型Ln化合物中,有力的实验和详细的理论证据表明,配体的第一激发单重态起着主导作用。在Tb 3+的情况下7 F 5能级扮演的角色的重要性显示了此过程中的化合物。能量转移速率的理论方法已成功地应用于实验数据的合理化。Eu(5 D J,5 L J,5 G J)和Tb(5 D J,5 G J,5 L J,5 H J,5 F J,5 I J)首次包含在计算中。同时考虑了多极机制和交换机制。实验强度参数(Ω λ),发射寿命(τ),辐射(A弧度)和非辐射(A