Modeling Anharmonic Effects in the Vibrational Spectra of High-Frequency Modes

EL Sibert III - Annual Review of Physical Chemistry, 2023 - annualreviews.org
High-resolution vibrational spectra of C–H, O–H, and N–H stretches depend on both
molecular conformation and environment as well as provide a window into the frequencies …

Intra-cluster charge migration upon hydration of protonated formic acid revealed by anharmonic analysis of cold ion vibrational spectra

T Khuu, T Schleif, A Mohamed, S Mitra… - The Journal of …, 2023 - ACS Publications
The rates of many chemical reactions are accelerated when carried out in micron-sized
droplets, but the molecular origin of the rate acceleration remains unclear. One example is …

[HTML][HTML] Electronic and mechanical anharmonicities in the vibrational spectra of the H-bonded, cryogenically cooled X−· HOCl (X= Cl, Br, I) complexes …

SJ Stropoli, T Khuu, MA Boyer, NV Karimova… - The Journal of …, 2022 - pubs.aip.org
We report vibrational spectra of the H 2-tagged, cryogenically cooled X−· HOCl (X= Cl, Br,
and I) ion–molecule complexes and analyze the resulting band patterns with electronic …

[HTML][HTML] A wave function correction-based approach to the identification of resonances for vibrational perturbation theory

MA Boyer, AB McCoy - The Journal of Chemical Physics, 2022 - pubs.aip.org
An approach for identifying resonances in vibrational perturbation theory calculations is
introduced. This approach makes use of the corrections to the wave functions that are …

Characterization of oxidation products from HOCl uptake by microhydrated methionine anions using cryogenic ion vibrational spectroscopy

SJ Stropoli, K Greis, T Schleif… - The Journal of Physical …, 2023 - ACS Publications
The oxidation of the amino acid methionine (Met) by hypochlorous acid (HOCl) to yield
methionine sulfoxide (MetO) has been implicated in both the interfacial chemistry of …

Observation of Slow Eigen-Zundel Interconversion in H+(H2O)6 Clusters upon Isomer-Selective Vibrational Excitation and Buffer Gas Cooling in a Cryogenic Ion …

T Khuu, A Rana, SC Edington, N Yang… - Journal of the …, 2023 - ACS Publications
The formation of isomers when trap** floppy cluster ions in a temperature-controlled ion
trap is a generally observed phenomenon. This involves collisional quenching of the ions …

[HTML][HTML] Microhydration of the metastable N-protomer of 4-aminobenzoic acid by condensation at 80 K: H/D exchange without conversion to the more stable O …

T Khuu, SJ Stropoli, K Greis, N Yang… - The Journal of Chemical …, 2022 - pubs.aip.org
4-aminobenzoic acid (4ABA) is a model scaffold for studying solvent-mediated proton
transfer. Although protonation at the carboxylic group (O-protomer) is energetically favored …

Formation of Chlorine in the Atmosphere by Reaction of Hypochlorous Acid with Seawater

I Mandal, NV Karimova, I Zakai… - The Journal of Physical …, 2024 - ACS Publications
The highly reactive dihalogens play a significant role in the oxidative chemistry of the
troposphere. One of the main reservoirs of these halogens is hypohalous acids, HOX, which …

Hydrogen Bonding versus Halogen Bonding: Spectroscopic Investigation of Gas‐Phase Complexes Involving Bromide and Chloromethanes

HT Robinson, CT Haakansson, TR Corkish… - …, 2023 - Wiley Online Library
Hydrogen bonding and halogen bonding are important non‐covalent interactions that are
known to occur in large molecular systems, such as in proteins and crystal structures …

Applications of Multiple Lasers in Mass Spectrometry: Structural Characterization and Kinetic Measurements of the Size-and Temperature-Dependent Water-Mediated …

T Khuu - 2023 - search.proquest.com
The goal of this thesis is to explore the critical role played by water molecules in the proton
migration between two spectroscopically distinct protonation sites adopted by 4 …