Experimental assessment of the efficacy of sensitised emission in water from a europium ion, following intramolecular excitation by a phenanthridinyl group
作者:Ian M. Clarkson、Andrew Beeby、James I. Bruce、Linda J. Govenlock、Mark P. Lowe、Ce´line E. Mathieu、David Parker、Kanthi Senanayake
DOI:10.1039/b001319f
日期:——
The overall quantum yields for phenanthridinium sensitised emission from a europium ion have been measured in H2O and D2O for a series of five structurally related, octadentate ligands in which the distance from the
phenanthridinium chromophore to the Eu ion varies from 2.5 to ca. 8.2 Å. Overall quantum yields (pD⩽2) range from 0.25 to 0.012 suggesting that the experimental distance for 50% efficiency of intramolecular energy transfer lies close to 5.5 Å for this system.
已经在H2O和D2O中测量了五种结构相关的八齿配体中,苯并噻啶铵敏化欧盟离子发射的整体量子产率,其中苯并噻啶色素到Eu离子的距离从2.5 Å变化到约8.2 Å。整体量子产率(pD≤2)范围从0.25到0.012,这表明在该系统中,分子内能量转移50%效率的实验距离接近5.5 Å。