Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg, Germany.
J Chem Phys. 2012 Oct 28;137(16):164302. doi: 10.1063/1.4759445.
The interaction between 3, 4, 9, 10-perylenetetracarboxylic dianhydride (PTCDA) molecules and solid rare gas samples is studied by means of fluorescence emission spectroscopy. Laser-excited PTCDA-doped large argon, neon, and para-hydrogen clusters along with PTCDA embedded in helium nanodroplets are spectroscopically characterized with respect to line broadening and shifting. A fast non-radiative relaxation is observed before a radiative decay in the electronic ground state takes place. In comparison, fluorescence emission studies of PTCDA embedded in bulk neon and argon matrices result in much more complex spectral signatures characterized by a splitting of the different emission lines. These can be assigned to the appearance of site isomers of the surrounding matrix lattice structure.
通过荧光发射光谱法研究了 3,4,9,10-苝四羧酸二酐（PTCDA）分子与固体稀有气体样品之间的相互作用。研究了激光激发的掺杂有 PTCDA 的大氩、氖和 para-氢团簇以及嵌入氦纳米液滴中的 PTCDA，对其线宽和移动进行了光谱特征分析。在发生辐射衰减之前，观察到快速的非辐射弛豫。相比之下，嵌入大块氖和氩基质中的 PTCDA 的荧光发射研究导致光谱特征更为复杂，其不同发射线的分裂。这些可以归因于周围基质晶格结构的位异构体的出现。
