Mode-Selective Promotion and Isotope Effects of Concerted Double-Hydrogen Tunneling in Porphycene Embedded in Superfluid Helium Nanodroplets

作者：Vdovin Alexander; Waluk Jacek; Dick Bernhard; Slenczka Alkwin^*

来源：ChemPhysChem, 2009, 10(5): 761-765.

DOI：10.1002/cphc.200900022

• fluorescence spectroscopy
• helium
• hydrogen tunneling
• isotope effects
• porphycene

<jats:title>Abstract</jats:title><jats:p><jats:bold>Intramolecular double‐hydrogen tunneling</jats:bold> in porphycene (see picture) is investigated. Low‐temperature conditions are ensured by doping of single molecules into superfluid helium nanodroplets. The investigation of fluorescence excitation and dispersed emission spectra and the highly dissipative environment allows the observation of mode‐selective tunneling splitting and reveals a purely concerted tunneling mechanism for all isotopic variants of porphycene.<jats:boxed-text content-type="graphic" position="anchor"><jats:graphic xmlns:xlink="http://www.w3.org/1999/xlink" mimetype="image/gif" position="anchor" specific-use="enlarged-web-image" xlink:href="graphic/mcontent.gif"><jats:alt-text>magnified image</jats:alt-text></jats:graphic></jats:boxed-text></jats:p>

• 出版日期2009-3-23