Understanding of protomers/deprotomers by combining mass spectrometry and computation

D Fu, SG Habtegabir, H Wang, S Feng… - Analytical and Bioanalytical …, 2023 - Springer
Multifunctional compounds may form different prototropic isomers under different conditions,
which are known as protomers/deprotomers. In biological systems, these …

Unlocking efficient high‐order multiphoton‐excited fluorescence of metal‐organic framework via octupolar module in situ formation

B Li, X Yu, J Wang, H Tang, X Sun… - Advanced Functional …, 2023 - Wiley Online Library
Engineering high‐order multiphoton excited fluorescent (H‐MPEF) materials is of significant
importance for sensing, 3D optical data storage and bioimaging. However, it remains a …

Hydration-induced protomer switching in p-aminobenzoic acid studied by cold double ion trap infrared spectroscopy

K Akasaka, K Hirata, F Haddad, O Dopfer… - Physical Chemistry …, 2023 - pubs.rsc.org
Para-Aminobenzoic acid (PABA) is a benchmark molecule to study solvent-induced proton
site switching. Protonation of the carboxy and amino groups of PABA generates O-and N …

Switching of Protonation Sites in Hydrated Nicotine via a Grotthuss Mechanism

Y Okura, GD Santis, K Hirata, VS Melissas… - Journal of the …, 2024 - ACS Publications
The switching of the protonation sites in hydrated nicotine, probed by experimental infrared
(IR) spectroscopy and theoretical ab initio calculations, is facilitated via a Grotthuss instead …

Investigation of crystal structures, spectral (FT-IR and NMR) analysis, DFT, and molecular docking studies of novel piperazine derivatives as antineurotic drugs

E Jaziri, H Louis, C Gharbi, F Lefebvre… - Journal of Molecular …, 2023 - Elsevier
In this article, the psychopharmacological potential of piperazine derivatives as an
antineurotic agent was presented. Crystal and molecular structure of newly synthesized …

Transition from vehicle to Grotthuss proton transfer in a nanosized flask: cryogenic ion spectroscopy of protonated p-aminobenzoic acid solvated with D 2 O

K Hirata, K Akasaka, O Dopfer, S Ishiuchi, M Fujii - Chemical Science, 2024 - pubs.rsc.org
Proton transfer (PT) is one of the most ubiquitous reactions in chemistry and life science. The
unique nature of PT has been rationalized not by the transport of a solvated proton (vehicle …

The impact of solvation on the structure and electric field strength in Li+ GlyGly complexes

KAE Meyer, E Garand - Physical Chemistry Chemical Physics, 2024 - pubs.rsc.org
To scrutinise the impact of electric fields on the structure and vibrations of biomolecules in
the presence of water, we study the sequential solvation of lithium diglycine up to three …

Ion Recognition beyond Size Matching: Cooperative Hydration Effect on the K+ Selectivity of Valinomycin over Na+ Revealed by Cryogenic Double Ion Trap Infrared …

K Hirata, E Sato, JM Lisy, S Ishiuchi… - The Journal of Physical …, 2023 - ACS Publications
The naturally occurring ionophore valinomycin (VM) selectively transports K+ across the
biological membrane, which makes VM a plausible antivirus and antibacterial candidate …

The Gas Phase Protonation Sites of Six Naturally Occurring Nicotinoids

Y Okura, GD Santis, K Hirata… - The Journal of …, 2024 - ACS Publications
The gas phase protonation sites of six naturally occurring nicotinoids, namely nicotine (NIC),
nornicotine (NOR), anabasine (ANB), anatabine (ANT), cotinine (COT), and myosmine …

Affinity of nicotinoids to a model nicotinic acetylcholine receptor (nAChR) binding pocket in the human brain

GD Santis, Y Okura, K Hirata, SI Ishiuchi… - The Journal of …, 2024 - ACS Publications
The binding affinity of nicotinoids to the binding residues of the α4β2 variant of the nicotinic
acetylcholine receptor (nAChR) was identified as a strong predictor of the nicotinoid's …