A5055692942- Molecular Spectroscopy and Structure
- Mass Spectrometry Techniques and Applications
- Advanced Chemical Physics Studies
- Electrochemical Analysis and Applications
- Quantum, superfluid, helium dynamics
- Magnetic Properties and Applications
- Ion channel regulation and function
- Receptor Mechanisms and Signaling
- Molecular Sensors and Ion Detection
- Physics of Superconductivity and Magnetism
- High-pressure geophysics and materials
- Inorganic Fluorides and Related Compounds
- Electrochemical sensors and biosensors
- Crystallography and molecular interactions
Tokyo Institute of Technology
2019-2023
Life Science Institute
2019-2021
Waseda University
1993
Abstract The infrared (IR) spectra of alkali and alkaline earth metal ion complexes with the Ac‐Tyr‐NHMe (GYG) peptide have been measured by laser photodissociation in a cold trap coupled an electrospray mass spectrometer. GYG corresponds to portion selectivity filter KcsA K + channel that allows pass, but blocks Na even though it has smaller ionic radius than . This current study extends previous investigation on entire set metaI ions dications. IR‐IR hole‐burning (IR 2 dip) spectroscopy...
Infrared (IR) spectra of resorcinol (Rs)-Arn clusters (n = 1 and 2) have been measured in the neutral cationic ground states (S0 D0) by IR dip resonance-enhanced multiphoton ionization (REMPI)-IR spectroscopy. The OH stretching vibrations S0 keep their frequency regardless number Ar atoms conformation groups Rs (rotamers RsI RsII), demonstrating that are attached to aromatic π-ring (π-bound structure) S0. In D0 state, Rs+-Arn reflect difference conformations (RsI+ RsII+). For n 1, both...
Structures and ionization-induced solvation dynamics of phenol-(argon)n clusters, PhOH-Arn (n ≤ 5), were studied by using a variety isomer-selective photoionization vibrational spectroscopic techniques. Several higher-energy isomers found assigned for the first time systematically controlling experimental conditions supersonic expansion. This behavior is also confirmed PhOH-Kr2 cluster. Solvation structures are elucidated evaluating systematic shifts in S1 ← S0 origin ionization energies...
Van der Waals clusters composed of He and aromatic molecules provide fundamental information about intermolecular interactions in weakly bound systems. In this study, phenol-helium (PhOH-Hen with n ≤ 2) are characterized for the first time by UV IR spectroscopies. The S1 ← S0 origin ionization energy both show small but additive shifts, suggesting π-bound structures these clusters, a conclusion supported rotational contour analyses bands. OH stretching vibrations PhOH moiety match those bare...
Abstract The front cover artwork is provided by Takashi Tsujino (Science Graphics Co., Ltd.) . image shows the efficacy of a bottom‐up approach to ion selectivity K + channels. GYG‐K complex, which replicates local portion channels, has three conformations with an equivalent distribution. Read full text Article at 10.1002/cphc.202000033
Abstract A low-temperature X-ray powder diffractometer has been developed and applied to the measurement of lattice constants Bi2Sr2CaCu2O x superconductor at 80 K, only 3 K higher than critical temperature. The relationship between electrical resistivity was studied. sample prepared by solid-state reaction sintered a hot-press system 750°C. Lattice Bi2Sr2CaCu2C were measured 293 K. sample, standard four-probe method, reached 0 Ω cm 77 decreased rapidly along with rapid shrinkage c-axial length.