Faculty Publications

Structure and Dynamics of Phthalocyanine−Argonn (n = 1−4) Complexes Studied in Helium Nanodroplets

Document Type

Article

Journal/Book/Conference Title

Journal of Physical Chemistry A

Volume

111

Issue

31

First Page

7576

Last Page

7584

Abstract

Van der Waals clusters of phthalocyanine with 1-4 argon atoms formed inside superfluid helium nanodroplets have been investigated by recording fluorescence excitation spectra as well as emission spectra. The excitation spectra feature a multitude of sharp lines when recorded in superfluid helium droplets in contrast to the respective spectra measured in a seeded supersonic beam (Cho et al. Chem. Phys. Lett. 2000, 326, 65). The pickup technique used for doping of the phthalocyanine and the argon into the droplets allows for nondestructive analysis of the cluster sizes. Alternation of the pickup sequence gives information on the binding site of the argon atoms. The investigation of dispersed emission spectra in helium droplets can be used as a special tool for the identification of 000 transitions within the variety of sharp lines seen in the excitation spectra. Thus, different isomers of the clusters can be distinguished. Moreover, the emission spectra reveal information on dynamic processes such as vibrational predissociation of the van der Waals complexes and interconversion among isomeric species. The binding energy of the phthalocyanine-argon1 complex in helium droplets was estimated to be at most 113 cm-1. © 2007 American Chemical Society.

Department

Department of Chemistry and Biochemistry

Original Publication Date

8-9-2007

DOI of published version

10.1021/jp0708493

Link to Full Text

Comments?

Share

COinS