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Oya N, Yatsuhashi T. Eluent-assisted Nonresonant Multiphoton Ionization of Polycyclic Aromatic Hydrocarbons in a Liquid Chromatograph-mass Spectrometer. CHEM LETT 2018. [DOI: 10.1246/cl.180379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Naoki Oya
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Tomoyuki Yatsuhashi
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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Shimizu A, Nagasaki K, Inoue Y, Mori T. Chiroptical properties of dithia[3.3]cyclophanes composed of anthracene and pyridine/pyridinium moieties: A combined experimental and theoretical study. Chirality 2017; 29:677-683. [PMID: 28833559 DOI: 10.1002/chir.22740] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/06/2017] [Accepted: 07/10/2017] [Indexed: 11/12/2022]
Abstract
Circular dichroisms (CDs) of neutral and protonated [3.3]anthracenopyridinophane (1 and 1-H+ ) were investigated experimentally and theoretically. Introducing an anthracene moiety with extended conjugation affected the cyclophane structure with the bent angles being appreciably reduced from those of parent [3.3]pyridinophane. The Cotton effects (CEs) observed at the 1 Bb band for both 1 and 1-H+ were fairly strong and apparently bisignate, which, however, turned out not to be a simple exciton couplet but to be composed of multiple transitions. In contrast, the CEs were much weaker in the 1 La band region. The spectral changes upon protonation were less significant compared with the parent pyridinophane, being dominated by the local transitions of anthracene. Nevertheless, the CD spectra of 1 and 1-H+ were well reproduced by theoretical calculations to allow us an unambiguous absolute configuration determination of the first high-performance liquid chromatography (HPLC) elute (from Chiralcel IB column) as Sp . The transannular interactions between the anthracene and pyridine/pyridinium units were examined by UV-vis and fluorescence spectroscopy to reveal a charge-transfer (CT) band in the low-energy region, particularly for 1-H+ . Despite the comparable CT interactions, the CE at the CT band was much stronger for the anthracenopyridinophane than for the parent pyridinophane, affording an anisotropy (g) factor as large as 4 × 10-3 .
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Affiliation(s)
- Akinori Shimizu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Keisuke Nagasaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Yoshihisa Inoue
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Tadashi Mori
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Osaka, Japan
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Nakashima N, Yamanaka KI, Saeki M, Ohba H, Taniguchi S, Yatsuhashi T. Metal ion reductions by femtosecond laser pulses with micro-Joule energy and their efficiencies. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2015.12.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Hamaguchi T, Okamoto T, Mitamura K, Matsukawa K, Yatsuhashi T. Synthesis of Hydrophilic and Hydrophobic Carbon Nanoparticles from Benzene/Water Bilayer Solution with Femtosecond Laser Generated Plasma Filaments in Water. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20140247] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Tomoyuki Hamaguchi
- Department of Chemistry, Graduate School of Science, Osaka City University
| | - Takuya Okamoto
- Department of Chemistry, Graduate School of Science, Osaka City University
| | | | | | - Tomoyuki Yatsuhashi
- Department of Chemistry, Graduate School of Science, Osaka City University
- PRESTO, Japan Science and Technology Agency (JST)
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Nakashima N, Yamanaka KI, Yatsuhashi T. Reduction of Yb(III) to Yb(II) by two-color two-photon excitation. J Phys Chem A 2013; 117:8352-9. [PMID: 23968280 DOI: 10.1021/jp402194g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ytterbium 3+ ions in alcohol were found to be reduced to the corresponding 2+ ions upon laser irradiation with a stepwise two-color two-photon excitation. The infrared (975-nm) pulse with a duration of 4 ns pumps the ground state to the 4f excited state with the transition of (2)F(5/2) ← (2)F(7/2), and the second photon (355-nm) generates the charge transfer (CT) state of Cl 3p to Yb 4f; the reduction then occurs. Laser energy and excitation wavelength dependencies well-explain the above mechanism. The product Yb(2+) was detected by its absorption spectrum peak at 367 nm. The absorption spectrum of the intermediate in the two-photon chemistry was measured from the 4f excited state ((2)F(5/2)) to the CT state by nanosecond laser photolysis. The intermediate spectrum appears in the wavelengths shorter than 400 nm with the molar extinction coefficient on the order of (10(2) M(-1) cm(-1)) at 340 nm and can be explained in terms of the CT absorption shifted by IR photon energy. A UV nanosecond laser pulse (266 nm from a YAG laser with a duration of 6 ns) can generate the reactive CT state by one-photon absorption and leads to Yb(2+) formation. The reaction yields for single-photon UV excitation and the second photon in the two-photon excitation are on the order of 0.1, suggesting that the reactive states are a common CT state.
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Affiliation(s)
- Nobuaki Nakashima
- Toyota Physical and Chemical Research Institute, Nagakute, Aichi 480-1192, Japan.
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Yatsuhashi T, Uchida N, Nishikawa K. Novel Method of Producing Carbon Nanoparticles on Benzene/Water Interface with Femtosecond Laser Plasma Filament. CHEM LETT 2012. [DOI: 10.1246/cl.2012.722] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tomoyuki Yatsuhashi
- Graduate School of Science, Osaka City University
- PRESTO, Japan Science and Technology Agency (JST)
| | - Naoko Uchida
- Department of Research Support, Division of University Management, Osaka City University
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Mori K, Ishibashi Y, Matsuda H, Ito S, Nagasawa Y, Nakagawa H, Uchida K, Yokojima S, Nakamura S, Irie M, Miyasaka H. One-Color Reversible Control of Photochromic Reactions in a Diarylethene Derivative: Three-Photon Cyclization and Two-Photon Cycloreversion by a Near-Infrared Femtosecond Laser Pulse at 1.28 μm. J Am Chem Soc 2011; 133:2621-5. [DOI: 10.1021/ja108992t] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Kazuya Mori
- Division of Frontiers Materials Science, Graduate School of Engineering Science and Center for Quantum Science and Technology under Extreme Conditions, Osaka University, CREST, JST, Toyonaka, Osaka 560-8531, Japan
| | - Yukihide Ishibashi
- Division of Frontiers Materials Science, Graduate School of Engineering Science and Center for Quantum Science and Technology under Extreme Conditions, Osaka University, CREST, JST, Toyonaka, Osaka 560-8531, Japan
| | - Hirohisa Matsuda
- Division of Frontiers Materials Science, Graduate School of Engineering Science and Center for Quantum Science and Technology under Extreme Conditions, Osaka University, CREST, JST, Toyonaka, Osaka 560-8531, Japan
| | - Syoji Ito
- Division of Frontiers Materials Science, Graduate School of Engineering Science and Center for Quantum Science and Technology under Extreme Conditions, Osaka University, CREST, JST, Toyonaka, Osaka 560-8531, Japan
| | - Yutaka Nagasawa
- Division of Frontiers Materials Science, Graduate School of Engineering Science and Center for Quantum Science and Technology under Extreme Conditions, Osaka University, CREST, JST, Toyonaka, Osaka 560-8531, Japan
| | - Hirotomo Nakagawa
- Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Seta, Otsu 520-2194, Japan
| | - Kingo Uchida
- Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Seta, Otsu 520-2194, Japan
| | - Satoshi Yokojima
- Mitsubishi Chemical Group Science & Technology Research Center, Inc., Kamoshida-cho 1000, Aoba-ku, Yokohama, 227-8502, Japan
| | - Shinichiro Nakamura
- Mitsubishi Chemical Group Science & Technology Research Center, Inc., Kamoshida-cho 1000, Aoba-ku, Yokohama, 227-8502, Japan
| | - Masahiro Irie
- Department of Chemistry and Research Center for Smart Molecules, Rikkyo University, Nishi-Ikebukuro, Toshima, Tokyo 171-8501, Japan
| | - Hiroshi Miyasaka
- Division of Frontiers Materials Science, Graduate School of Engineering Science and Center for Quantum Science and Technology under Extreme Conditions, Osaka University, CREST, JST, Toyonaka, Osaka 560-8531, Japan
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