We investigate the solvent shift of phthalocyanine (Pc) doped into superfluid helium droplets and probed by optical spectroscopy at the electronic origin. Our present work complements extant studies and provides results that in part contradict previous conclusions. In particular, the solvent shift does not increase monotonously with droplet radius all the way up to the bulk limit, but exhibits just the reverse dependence instead. Moreover, a substructure is resolved, whose characteristics depend on the droplet size. This behavior can hardly be reconciled with that of a freely rotating Pc-helium complex.

中文翻译：

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电子源的光学线形揭示了超流氦纳米液滴中酞菁分子的微溶剂化

我们调查了酞菁（Pc）掺杂到超流体氦滴中的溶剂迁移，并通过电子学的光谱学对其进行了探测。我们目前的工作是对现有研究的补充，并提供了部分与先前结论相矛盾的结果。尤其是，溶剂转移不会随着液滴半径一直到体积极限而单调增加，而仅表现出反向依赖性。此外，解析出子结构，其特征取决于液滴大小。这种行为很难与自由旋转的Pc-氦配合物的行为相协调。