Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 38, 2006
Previous Article Next Article

Mass-analyzed threshold ionization spectroscopy of pyridine. Structural distortion in the first excited state

Author affiliations

Abstract

For the first time, vibrational spectra of the pyridine cation in the electronic ground state have been measured via several intermediate states (00, 16b20, 16b40, 6a10, 6b1, 16a10, 10a10 and 121) by Mass-Analyzed Threshold Ionization (MATI) spectroscopy. From the MATI spectra, the adiabatic ionization energy of pyridine has been determined to be 74 185 ± 6 cm−1 (9.1978 ± 0.0008 eV). Several vibronic modes in the ionic ground state could be assigned for the first time. An intensity gain of vibrations having b1 symmetry could be observed by activating the ion ground state. Also, a breakdown of the “Δν = 0 propensity rule” for the excitation via the 16b2 and 16b4 states of the first excited states are displayed in the recorded spectra. In conjunction with ab initio calculations these observations can be explained by a strong geometrical distortion along the 16b vibration in the first excited state, leading to a “boat distortion”.

Graphical abstract: Mass-analyzed threshold ionization spectroscopy of pyridine. Structural distortion in the first excited state

Back to tab navigation

Publication details

The article was received on 25 May 2006, accepted on 16 Aug 2006 and first published on 29 Aug 2006


Article type: Paper
DOI: 10.1039/B607402B
Citation: Phys. Chem. Chem. Phys., 2006,8, 4441-4448

  •   Request permissions

    Mass-analyzed threshold ionization spectroscopy of pyridine. Structural distortion in the first excited state

    M. Riese, Z. Altug and J. Grotemeyer, Phys. Chem. Chem. Phys., 2006, 8, 4441
    DOI: 10.1039/B607402B

Search articles by author

Spotlight

Advertisements