The phonon wings in the (S1←S0) spectra of tetracene, pentacene, porphin and phthalocyanine in liquid helium droplets

被引：58

作者：

Hartmann, M ^{[1
]}

Lindinger, A ^{[1
]}

Toennies, JP ^{[1
]}

Vilesov, AF ^{[1
]}

机构：

[1] Max Planck Inst Stromungsforsch, D-37073 Gottingen, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2002年 / 4卷 / 20期

关键词：

D O I：

10.1039/b203249j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The vibronic spectra of the large organic molecules tetracene (C18H12), pentacene (C24H14), base-free porphin (C20H14N4) and base-free phthalocyanine (C32H18N8) have been investigated in large (Napproximate to10(3)-10(4)) He-4 droplets using laser induced fluorescence. The spectra show sharp zero phonon lines (Deltanuless than or equal to0.2 cm(-1)), accompanied by weaker phonon wings on the blue side. The very small inhomogeneous broadening of the zero phonon lines supports the unique properties of liquid He as an extremely gentle ultra-cold matrix for high resolution spectroscopy of larger molecules. Pronounced structures in the phonon wings, which are characteristic for each molecule, are attributed to the excitation of vibrational modes of the helium atoms located in shells surrounding the molecule.

引用

页码：4839 / 4844

页数：6

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