Related Experiment Video
Updated: Jun 27, 2026

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
B (2)Sigma(u)+ <-- X (2)Pi(g) electronic spectrum of NCCN+ in the gas phase
V Rudnev1, C A Rice, J P Maier
1Department of Chemistry, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland.
Abstract:
The B (2)Sigma(u)(+) <-- X (2)Pi(g) absorption spectrum of NCCN(+) in the gas-phase was observed using a two-color, two-photon photodissociation technique. This was measured at approximately 20 K in a 22-pole ion trap with laser bandwidths of less than a cm(-1). The spectrum shows distinct vibrational structure, with the origin band near 11,253 cm(-1), and the excitation of four normal modes in the excited state. The rotational structure of the 0(0)(0) band in the gas phase could not be resolved, indicating that the B (2)Sigma(u)(+) state has a lifetime of a few picoseconds because of a fast intramolecular process.
More Related Videos
08:54Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
Published on: January 25, 2020
08:42High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions
Published on: October 10, 2014
Related Concept Videos
UV–Vis Spectroscopy: Molecular Electronic Transitions
Emission Spectra
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
¹³C NMR: ¹H–¹³C Decoupling
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
Molecular Spectroscopy: Absorption and Emission