附着在稀有气体样品上的PTCDA的光谱学：簇与块体基质。I.吸收光谱
Spectroscopy of PTCDA attached to rare gas samples: clusters vs. bulk matrices. I. Absorption spectroscopy
摘要：
用激光诱导荧光激发光谱研究了3，4，9，10-二萘嵌苯四甲酸二酐（PTCDA）与稀有气体和仲氢的相互作用。PTCDA嵌入在氖矩阵和光谱附着到大的氖团簇的光谱之间的比较表明，这些大的有机分子驻留在集群的表面时，通过拾取技术掺杂。PTCDA分子在与氩、氖和仲氢原子团簇结合时可以呈现不同的构象，这意味着这些原子团簇的表面具有明确的结构，并且不具有液体或流动性质。此外，对这些团簇的掺杂过程的精确分析表明，团簇表面上的大分子的流动性被淬灭，从而防止团聚和复合物的形成。
英文摘要：
The interaction between PTCDA (3,4,9,10-perylene-tetracarboxylic-dianhydride) and rare gas or para-hydrogen samples is studied by means of laser-induced fluorescence excitation spectroscopy. The comparison between spectra of PTCDA embedded in a neon matrix and spectra attached to large neon clusters shows that these large organic molecules reside on the surface of the clusters when doped by the pick-up technique. PTCDA molecules can adopt different conformations when attached to argon, neon and para-hydrogen clusters which implies that the surface of such clusters has a well-defined structure and has not liquid or fluxional properties. Moreover, a precise analysis of the doping process of these clusters reveals that the mobility of large molecules on the cluster surface is quenched, preventing agglomeration and complex formation.
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