Two-color resonance enhanced multi-photon ionization and mass analyzed threshold ionization spectroscopy of 2-aminobenzonitrile and the CN substitution effect
Abstract
Two-color resonance two-photon ionization and mass analyzed threshold ionization spectra of 2-aminobenzonitrile have been obtained. The band origin of the S1 ← S0 transition and the precise ionization energy (IE) were determined to be 31,265 ± 2 cm-1 and 66,653 ± 5 cm-1, respectively. The most active modes in the S1 and D0 states are related to the in-plane ring vibrations. The relative errors of IE estimated by CBS-QB3 and G4 are -0.18% and +1.47%, respectively. The theoretical calculations well support our experimental findings.
- Publication:
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Chemical Physics Letters
- Pub Date:
- January 2018
- DOI:
- 10.1016/j.cplett.2017.12.073
- Bibcode:
- 2018CPL...692..395J
- Keywords:
-
- Two-color resonance enhanced multi-photon ionization;
- Photo ionization efficiency;
- Mass-analyzed threshold ionization;
- 2-Aminobenzonitrile;
- Vibronic spectrum;
- Cation spectrum;
- Photoionization efficiency