Thermal and electrical properties of porphyrin derivatives and their relevance for molecule interferometry

Sarayut Deachapunya (Corresponding author), André Stefanov, Martin Berninger, Hendrik Ulbricht, Elisabeth Reiger, Nikos Doltsinis, Markus Arndt

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Abstract

The authors present new measurements of thermal and electrical properties for two porphyrin derivatives. They determine their sublimation enthalpy from the temperature dependence of the effusive beam intensity. The authors study H2 TPP and Fe(TPP)Cl in matter-wave interferometry. Both molecules have nearly equal de Broglie wavelengths but different internal characteristics: only Fe(TPP)Cl exhibits an electric dipole moment of about 2.7 D and the authors discuss its influence on the molecular interference pattern. The authors add an external electric force field to the interferometer and use it to measure the scalar polarizability. They compare their experimental values ? (H2 TPP) =105±4±6 Å3 and ? (Fe (TPP) Cl) =102±9±6 Å3 to ab initio calculations and they discuss the influence of thermal excitations on the polarizability. © 2007 American Institute of Physics.
Original languageEnglish
Article number164304
Number of pages7
JournalJournal of Chemical Physics
Volume126
Issue number16
DOIs
Publication statusPublished - 2007

Austrian Fields of Science 2012

  • 103036 Theoretical physics
  • 103025 Quantum mechanics

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