Fuini John F, Surampudi Anand B, Penick Mark A, Mahindaratne Mathew P D, Negrete George R, Brancaleon Lorenzo
Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX 78249, USA.
Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249, USA.
Dyes Pigm. 2011 Feb 1;88(2):204-211. doi: 10.1016/j.dyepig.2010.06.009.
The fundamental photophysical properties of three symmetrically substituted 3,9-perylene analogues were examined in a diverse range of solvents. All three compounds exhibited solvent-dependent fluorescence quantum yield, which was lower than that of perylene or its diimides. Whilst the absence of a large excited state dipole moment suggests that there is no preferential charge accumulation in one side of the molecules, the data suggest that intramolecular electron transfer occurs and that such an event causes additional photochemical mechanisms in chlorinated compounds where the fluorescence quantum yield is lower than in all other solvents and the values of the fluorescence decay change significantly. The dyes could be an interesting new class of fluorescence tags for labeling biomolecules and as dyes for organic photovoltaic materials.
在多种溶剂中研究了三种对称取代的3,9-苝类似物的基本光物理性质。所有这三种化合物均表现出与溶剂有关的荧光量子产率，该产率低于苝或其二酰亚胺的荧光量子产率。虽然不存在大的激发态偶极矩表明分子的一侧没有优先电荷积累，但数据表明发生了分子内电子转移，并且这种情况在氯化化合物中引发了额外的光化学机制，其中荧光量子产率低于所有其他溶剂中的产率，并且荧光衰减值发生了显著变化。这些染料可能是用于标记生物分子的一类有趣的新型荧光标签，也可作为有机光伏材料的染料。
