A5045193924- Advanced Chemical Physics Studies
- Mass Spectrometry Techniques and Applications
- Spectroscopy and Quantum Chemical Studies
- Laser-Matter Interactions and Applications
- Molecular spectroscopy and chirality
Queen's University Belfast
2017-2020
Abstract The fast and accurate analysis of chiral chemical mixtures is crucial for many applications but remains challenging. Here we use elliptically-polarized femtosecond laser pulses at high repetition rates to photoionize molecules. 3D photoelectron angular distribution produced provides molecular fingerprints, showing a strong forward-backward asymmetry which depends sensitively on the structure degree ellipticity. Continuously scanning ellipticity analyzing evolution rich,...
Abstract In this work, the photoionization of chiral molecules by an elliptically polarized, high repetition rate, femtosecond laser is probed. The resulting 3D photoelectron angular distribution shows a strong forward–backward asymmetry, which highly dependent not only on molecular structure but also ellipticity pulse. By continuously varying ellipticity, we can observe and enantiomer changes in real time at previously unseen speed precision. technique allows enantiomeric excess pure...
In the chiro-optical phenomenon known as photoelectron circular dichroism, angular distribution of electrons ionized from chiral molecules by circularly polarized light pulses has been found to be anti-symmetric with respect direction propagation. To study this phenomenon, were multiphoton a femtosecond laser in our laboratory. Using simple stereo-detection setup, direct measurements asymmetry for exemplar aromatic molecule 1-phenylethanol made using 260 nm produced at rate 1 MHz. It was...