Toshinori Suzuki 교수

Femtosecond time-resolved photoelectron imaging (TRPEI) is a variant of time-resolved photoelectron spectroscopy used in the study of gas-phase photoinduced dynamics. A new observable, time-dependent photoionization-differential cross section provides useful information on wave-packet motions, electronic dephasing, and photoionization dynamics. This review describes fundamental issues and the most recent works involving TRPEI.

We present the first measurement of the vertical binding energy (VBE) of a hydrated electron in bulk water by the time-resolved photoelectron spectroscopy (TRPES) of the charge-transfer-to-solvent (CTTS) reaction in aqueous NaI solution. Our best estimate of VBE is 3.27 +/- 0.10 eV for H(2)O and 3.20 +/- 0.10 eV for D(2)O.

Products formed from defined oligodeoxyribonucleotide tetramers (oligonucleotides) by depurination at pH 5.0 and 90 degrees C followed by chain breakage at the resulting apurinic sites (AP sites) were assigned by reversed phase HPLC. Through kinetic analysis, rate constants of depurination and subsequent chain breakage reactions were measured. Depurination of the oligonucleotides with purine bases locating at the terminal positions was several times faster than those with purines at the internal

The speed, angular, and alignment distributions of S(1D2) atoms from the ultraviolet photodissociation of OCS have been measured by a photofragment imaging technique. From the excitation wavelength dependence of the scattering distribution of S(1D2), the excited states accessed by photoabsorption were assigned to the A′ Renner–Teller component of the 1Δ and the A″(1Σ−) states. It was found that the dissociation from the A′ state gives rise to high- and low-speed fragments, while the A″ state onl

State-resolved differential cross sections (DCSs) for the inelastic scattering of NO(j" = 0.5, Omega" = 1/2) + Ar --> NO(j', Omega' = 1/2, 3/2) + Ar were obtained at a collision energy of 516 cm(-1), both experimentally and theoretically. A crossed molecular beam ion-imaging apparatus was used to measure DCSs for 20 final (j', Omega') states, including spin-orbit conserving (DeltaOmega = 0) and changing (DeltaOmega = 1) transitions. Quantum close-coupling scattering calculations on ab initio cou

High-resolution soft X-ray photoelectron spectra of liquid water (H(2)O and D(2)O) were measured using a liquid beam photoelectron spectrometer. The 1a(1) (O1s) band and the lowest valence 1b(1) band had single peaks, which is not consistent with the split 1b(1)→ 1a(1) of the X-ray emission band of liquid water if the splitting is assumed to originate from level shifts in two different hydrogen bonding structures. The second valence 3a(1) band of liquid water exhibited a flat top implying that t

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTIsolation and Characterization of a Novel Product, 2'-Deoxyoxanosine, from 2'-Deoxyguanosine, Oligodeoxynucleotide, and Calf Thymus DNA Treated by Nitrous Acid and Nitric OxideToshinori Suzuki, Ryohei Yamaoka, Masatoshi Nishi, Hiroshi Ide, and Keisuke MakinoView Author Information Department of Polymer Science and Engineering and Department of Applied Biology Kyoto Institute of Technology Matsugasaki, Sakyo-ku, Kyoto 606, Japan Faculty of Pharmac

The nascent vibrational distribution of CH3 produced by the reaction O(1D2)+CH4→OH+CH3 (ΔH0=−182 kJ mol−1) has been investigated by infrared diode laser kinetic spectroscopy. The reaction was initiated by the generation of O(1D2) atoms by excimer laser photolysis of N2O or O3 at a total pressure of 200 mTorr, and the ν2 (out-of-plane bending) bands of CH3, v2=1←0 up to 4←3, were measured as functions of time. The vibrational distribution of ν2 (v≤3) was found to be noninverted and much less exci

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTwo-color stimulated emission spectroscopy of trans-stilbene: large amplitude torsional motion in the ground state and its role in intramolecular vibrational redistributionToshinori Suzuki, Naohiko Mikami, and Mitsuo ItoCite this: J. Phys. Chem. 1986, 90, 24, 6431–6440Publication Date (Print):November 1, 1986Publication History Published online1 May 2002Published inissue 1 November 1986https://pubs.acs.org/doi/10.1021/j100282a007https://doi.org/10.1021

Recent advances in photoelectron and photoion imaging techniques are reviewed. The general background to photofragmentation spectroscopy and, in particular, the information that can be extracted from laboratory and molecular frame photoproduct angular distributions are briefly discussed. Recent technological advances to the photofragment imaging experiment first introduced by Chandler and Houston, such as velocity mapping and event counting, are also described. The main focus of the review is de

Abstract Time-resolved photoelectron spectroscopy of non-adiabatic processes in isolated molecules in molecular beams and aqueous solutions at ambient temperatures is discussed. In the former, time–energy mapping of photoelectron kinetic energy and angular distributions is performed with 22 fs time-resolution by photoelectron imaging using a multicolour filamentation light source. The S 2–S 1 internal conversion dynamics in pyrazine, benzene and toluene mediated by conical intersections and deac

Ultrafast dephasing in an intermediate case of molecular radiationless transition has been visualized for the first time by femtosecond time-resolved photoelectron imaging. The decay of photoexcited S1(n,π*) state of pyrazine in 100 ps and the corresponding build-up of triplet states were clearly observed.

The electronic energy and dynamics of solvated electrons, the simplest yet elusive chemical species, is of interest in chemistry, physics, and biology. Here, we present the electron binding energy distributions of solvated electrons in liquid water, methanol, and ethanol accurately measured using extreme ultraviolet (EUV) photoelectron spectroscopy of liquids with a single-order high harmonic. The distributions are Gaussian in all cases. Using the EUV and UV photoelectron spectra of solvated ele