Výsledky vyhledávání - "Naohiko Mikami"

Photodetachment Spectroscopy of Fluorenone Radical Anions Microsolvated with Methanol: Rationalizing the Anomalous Solvatochromic Behavior Due to Hydrogen Bonding

Autor: Asuka Fujii, Keiji Yoshida, Izumi Yagi, Naohiko Mikami, Toshihiko Maeyama

Publikováno v: The Journal of Physical Chemistry A. 119:3721-3730

The attribution of the extraordinary blue shift for the intramolecular charge-transfer absorption band of fluorenone radical anion solvated in protic media was investigated by means of photodetachment spectroscopy of the gas-phase anions microsolvate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa66da4a781debb3edac59d7766b8acf
https://doi.org/10.1021/acs.jpca.5b01147

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Hyperconjugation in diethyl ether cation versus diethyl sulfide cation

Autor: Naohiko Mikami, Tomoya Endo, Kaito Takahashi, Masato Morita, Asuka Fujii, Yoshiyuki Matsuda

Publikováno v: Physical Chemistry Chemical Physics. 17:23602-23612

Ionization of a molecule can greatly alter its electronic structure as well as its geometric structure. In this collaborative experimental and theoretical study, we examined variance in hyperconjugation upon ionization of diethyl ether (DEE) and diet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5a6234a7d2b6f72e6ae2b8033d15f2a
https://doi.org/10.1039/c5cp03765d

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Isomer-selective infrared spectroscopy of the cationic trimethylamine dimer to reveal its charge sharing and enhanced acidity of the methyl groups

Autor: Yuichiro Nakayama, Naohiko Mikami, Asuka Fujii, Yoshiyuki Matsuda

Publikováno v: Phys. Chem. Chem. Phys.. 16:9619-9624

Infrared predissociation spectroscopy of the trimethylamine dimer cation generated by the vacuum-ultraviolet photoionization is isomer-selectively carried out by monitoring two main fragment channels, protonated trimethylamine and the trimethylamine

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d854bebc4b09a5060d002b78e64b9aa2
https://doi.org/10.1039/c4cp00659c

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Infrared spectroscopy for acetone and its dimer based on photoionization detection with tunable coherent vacuum-ultraviolet light

Autor: Asuka Fujii, Yoshiyuki Matsuda, Keisuke Ohta, Naohiko Mikami

Publikováno v: Chemical Physics Letters. 471:50-53

Infrared (IR) spectroscopy based on vacuum-ultraviolet (VUV) one-photon ionization detection is carried out for bare acetone and its dimer by use of tunable coherent VUV light. This is the first application of tunable VUV light to IR spectroscopy of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::27314c0d86cbd74afd3e6239b8ac3dbb
https://doi.org/10.1016/j.cplett.2009.02.026

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Comprehensive Analysis of the Hydrogen Bond Network Morphology and OH Stretching Vibrations in Protonated Methanol−Water Mixed Clusters, H+(MeOH)1(H2O)n (n = 1−8)

Autor: Asuka Fujii, Dan Bing, Naohiko Mikami, Zhi Zhong Xie, Ken Ichiro Suhara, Toru Hamashima, Jer-Lai Kuo

Publikováno v: The Journal of Physical Chemistry A. 112:10125-10133

Density functional theory (DFT) calculations of protonated methanol-water mixed clusters, H (+)(MeOH) 1(H 2O) n ( n = 1-8), were extensively carried out to analyze the hydrogen bond structures of the clusters. Various structural isomers were energy o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2006005936c5fe47c4331d6a71fffbf5
https://doi.org/10.1021/jp8057299

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Photoelectron spectroscopy of microsolvated benzophenone radical anions to reveal the origin of solvatochromic shifts in alcoholic media

Autor: Toshihiko Maeyama, Izumi Yagi, Asuka Fujii, Naohiko Mikami

Publikováno v: Chemical Physics Letters. 457:18-22

The 355 nm photoelectron spectra of bare and methanol-solvated radical anions of benzophenone were measured. Sequential shifts of the vertical detachment energy represent a similarity in shape to those of the photoabsorption spectrum reported previou

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c5a28445591a16b2decc5f8f05a8b69f
https://doi.org/10.1016/j.cplett.2008.03.055

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Relaxation dynamics of NH stretching vibrations of 2-aminopyridine and its dimer in a supersonic beam

Autor: Yuji Yamada, Takayuki Ebata, Naohiko Mikami

Publikováno v: Proceedings of the National Academy of Sciences of the United States of America. 105(35):12690-12695

Picosecond time-resolved IR–UV pump–probe spectroscopy has been carried out to elucidate vibrational energy relaxation (VER) of the NH stretching vibrations of 2-aminopyridine monomer (2AP) and dimer [(2AP) 2 ] in supersonic beams. In bare 2AP, i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::456a909172695273c04d17d21ad9c614
http://ir.lib.hiroshima-u.ac.jp/00025981

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Stepwise Solvatochromism of Ketyl Anions in the Gas Phase: Photodetachment Excitation Spectroscopy of Benzophenone and Acetophenone Radical Anions Microsolvated with Methanol

Autor: Naohiko Mikami, Izumi Yagi, Toshihiko Maeyama, and Asuka Fujii

Publikováno v: The Journal of Physical Chemistry A. 111:7646-7652

Electronic absorption spectra of bare and methanol-solvated radical anions of benzophenone ((C6H5)2CO) and acetophenone ((C6H5)CH3CO) were measured by monitoring the photodetachment efficiency in the gas phase. Strong absorption bands due to autodeta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc78cf1d4ef8623b13ccc1dcf030d736
https://doi.org/10.1021/jp072167l

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Direct observation of the solvent reorientation dynamics in the 'twisted' intramolecular charge-transfer process of cyanophenyldisilane–water cluster by transient infrared spectroscopy

Autor: Masuyuki Sugiyama, Haruki Ishikawa, Wataru Setaka, Mitsuo Kira, Naohiko Mikami

Publikováno v: Phys. Chem. Chem. Phys.. 9:117-126

The solvent reorientation dynamics of the intramolecular charge-transfer (ICT) process of the (p-cyanophenyl)pentamethyldisilane-H(2)O (CPDS-H(2)O) cluster was investigated by transient infrared (IR) absorption spectroscopy. Transient IR bands of two

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfcdd6b1d3bb79bbffd513fdb0bee4b7
https://doi.org/10.1039/b612758d

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