Fuminori Misaizu

Photodissociation spectra of Mg+(H2O)n (n=1–5) cluster ions were examined in the wavelength region from 720 to 250 nm by monitoring the total yield of the fragment ions. The absorption bands exhibit redshifts as large as 17 000 cm−1 with respect to the 2P–2S resonance line of the free Mg+ ion and were explained by the shift of this transition as a result of hydration. The spectra also exhibit clear evolution of solvation shell with the first shell closing at n=3, being consistent with the theore

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotodissociation of size-selected aquamagnesium (Mg+(H2O)n) ions for n = 1 and 2Fuminori Misaizu, Masaomi Sanekata, Keizo Tsukamoto, Kiyokazu Fuke, and Suehiro IwataCite this: J. Phys. Chem. 1992, 96, 21, 8259–8264Publication Date (Print):October 1, 1992Publication History Published online1 May 2002Published inissue 1 October 1992https://pubs.acs.org/doi/10.1021/j100200a012https://doi.org/10.1021/j100200a012research-articleACS PublicationsRequest reus

The mechanism of the resonance-enhanced two-photon ionization (RE2PI) and the dissociation of ammonia clusters has been investigated by using the two-color ionization technique and the reflectron time-of-flight mass spectrometer. The clusters are firstly excited to the intermediate state corresponding to the à 1A2 state of an ammonia molecule. The lifetime of the intermediate species is found to be <10 ns for the production of NH4+ and (NH3)2+, and longer than 1 μs for (NH3)nNH4+ (1≤n≤6)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDissociation dynamics and multiphoton ionization mechanism of ammonia clustersF. Misaizu, P. L. Houston, N. Nishi, H. Shinohara, T. Kondow, and M. KinoshitaCite this: J. Phys. Chem. 1989, 93, 20, 7041–7044Publication Date (Print):October 1, 1989Publication History Published online1 May 2002Published inissue 1 October 1989https://doi.org/10.1021/j100357a002RIGHTS & PERMISSIONSArticle Views135Altmetric-Citations27LEARN ABOUT THESE METRICSArticle Views ar

Herein, the compositions and geometrical structures of niobium oxide cluster ions were studied and compared with those of the lighter Group 5 counterpart vanadium oxide cluster ions by ion-mobility mass spectrometry (IM-MS). As a result of collision-induced dissociation in IM-MS, the compositions were found to be dependent on an odd and even number of niobium atoms, whereby the ions with (NbO₂)(Nb₂O₅)_(m-1)/2⁺ and (NbO₃)(Nb<sub>2</

Negative ions of CO2 clusters (CO2)m produced by electron transfer from highly excited Rydberg atoms were investigated by mass spectrometry. The relative intensities of (CO2)−n (n≥3) (size distribution) showed a characteristic structure with magic numbers at 9, 14, and 16. The dependence of the intensities of (CO2)−n (n=7–20) on the stagnation pressure of the cluster beam source was measured. The threshold pressure at which a cluster anion of a given size started to appear increased irregularly

Negative‐ion photoelectron spectroscopy has been applied in order to obtain size dependent information about the electronic structure of clusters of metal atoms solvated with polar molecules. In the present paper we have investigated the photoelectron spectra of Cu 2 - , cluster ions with 2 = 0–4 and also those of Cu 2 - , with n = 0 and 1. In the spectra of Cu 2 - , the lowest energy bands were assigned to the electron detachment from the CuOH - , which were produced in the source together with

Stable compositions and structures of copper oxide cluster cations have been studied by ion mobility mass spectrometry (IMMS) and density functional theory calculations. Cluster ions of the series Cu <i>_n</i> O <i>_m</i> ⁺ were predominantly observed with <i>n:m</i> ≈ 2:1 in the mass spectrum. Collision cross sections (CCSs) of the cluster ions with <i>n:m</i> ≈ 2:1, determined by IMMS, were found to increase monotonically with cluster size. In addition, the CCSs

The electronic structures of hydrated metal-atom clusters have been investigated by negative-ion photoelectron spectroscopy. We have obtained the photoelectron spectra of Cu − ( H 2 O ) n with n=0−4 and Na − ( H 2 O ) n with n=0−12. For the former clusters, we also detected the electron detachment from the CuOH − ( H 2 O ) n−1 which coexists with Cu − ( H 2 O ) n . The observed bands for both Cu − ( H 2 O ) n and Na − ( H 2 O ) n were all assigned to the transitions to the states originating in