A5083740070- Astrophysics and Star Formation Studies
- Molecular Spectroscopy and Structure
- Advanced Chemical Physics Studies
- South Asian Studies and Conflicts
- Synthesis and Biological Evaluation
- Wildlife-Road Interactions and Conservation
- Organic Chemistry Cycloaddition Reactions
- Chemical Reactions and Mechanisms
- Politics and Conflicts in Afghanistan, Pakistan, and Middle East
- Atmospheric Ozone and Climate
University of Edinburgh
2023-2024
We present the low temperature gas-phase vibrational spectrum of ionised 1-cyanonaphthalene (1-CNN + ) in mid-infrared region.
The electronic and vibrational spectra of benzonitrile cation, C6H5CN+ (BZN+), in the gas phase at low temperatures are reported. Measurements were carried out using a cryogenic ion trapping apparatus. mid-infrared spectrum shows strong CN stretch 2130 ± 1 cm−1 (4.694 0.002 µm). is reported range 5040–5750 Å. This covers forbidden B2B2 ← X2B1 allowed C2B1 transitions. dominated by broad absorption feature wavelengths shorter than 5250 Å, with strongest located 5140 Experimental data...
2-Cyanoindene is one of the few specific aromatic or polycyclic hydrocarbon (PAH) molecules positively identified in Taurus molecular cloud-1 (TMC-1), a cold, dense cloud that considered nearest star-forming region to Earth. We report cryogenic mid-infrared (550-3200 cm-1) and visible (16,500-20,000 cm-1, over D 2 ← 0 electronic transition) spectra 2-cyanoindene radical cations (2CNI+), measured using messenger tagging (He Ne) photodissociation spectroscopy. The infrared reveal prominence...
Context. Polycyclic aromatic hydrocarbons (PAHs) are believed to be the carriers of infrared bands and have been proposed as candidates explain other astronomical phenomena such diffuse interstellar (DIBs). The first structures possessing more than one ring, 1- 2-cyanonaphthalene (CNN), were recently detected by rotational spectroscopy in dense molecular cloud TMC-1. Laboratory investigations indicated that due fast efficient relaxation through recurrent fluorescence (RF), CNN + may...
Identification of the molecular carriers diffuse interstellar bands (DIBs) requires gas phase electronic spectra suitable candidate structures. Recording these in laboratory is challenging because they include large, carbon-rich molecules, many which are likely to be ionic. The ions often obtained using action spectroscopy methods, can induce small perturbations absorption characteristics and hinder comparison with astronomical observations. In this contribution, appropriateness...