Publications by Tomoko Imasaka

45. Ju Tiantian, K. Yoshinaga, T. Imasaka, H. Nakamura, T. Imasaka, Time-correlated Single Ion Counting Mass Spectrometer with Long and Short Time-of-flight Tubes and an Evaluation of its Performance for Use in Trace Analysis of Allergenic Substances, Analytical Sciences (Special Issue), accepted, (2020) 10.2116/analsci.19SBP03

44. Resonant and non-resonant femtosecond ionization mass spectrometry of organochlorine pesticides, S. L. Madunil, T. Imasaka, T. Imasaka, Analyst,
(2020) DOI: 10.1039/C9AN01861A, impact factor 4.019

43.Determination of nerve agent metabolites in human urine by femtosecond laser ionization mass spectrometry using 2-(bromomethyl)naphthalene as a derivatizing reagent, V. V. Son, H. Nakamura, T. Imasaka, T. Imasaka,Analytica Chimica Acta,
vol.1069, pp.82-88 (2019) DOI: 10.1016/j.aca.2019.04.012, impact factor 5.256

42.Determination of pesticides by gas chromatography combined with mass spectrometry using femtosecond lasers emitting at 267, 400, and 800 nm as the ionization source, X. Yang, T. Imasaka, T. Imasaka,Analytical Chemistry, vol. 90 (7), pp. 4886–4893 (2018)DOI: 10.1021/acs.analchem. 8b00537, impact factor 6.35

41.Optimal Laser Wavelength for Femtosecond Ionization of Polycyclic Aromatic Hydrocarbons and their Nitrated Compounds in Mass Spectrometry, A. Li, T. Imasaka, T. Imasaka,Analytical Chemistry, vol. 90, p.2963-2969 (2018) DOI: 10.1021/acs.analchem.8b00125, impact factor 6.35, international co-authored paper

40.Use of chemical conversion for determination of nitrated aromatic hydrocarbons using femtosecond ionization mass spectrometry, T. Fujii, T. Imasaka, T. Imasaka,Analytica Chimica Acta, vol. 996, p. 48-53 (2017) DOI: 10.1016/j.aca.2017.09.049, impact factor 5.256

39.Suppression of fragmentation in multiphoton ionization mass spectrometry using a near-infrared femtosecond laser as an ionization source, A. Li, T. P. Dinh, T. Imasaka, T. Imasaka,Analyst, vol. 142, p. 3942 -3947 (2017)DOI: 10.1039/c7an01172e, impact factor 4.019, international co-authored paper

38.Determination of Nerve Agent Metabolites by Ultraviolet Femtosecond Laser Ionization Mass Spectrometry A, Hamachi, T. Imasaka, H. Nakamura, A. Li, T. Imasaka,Analytical Chemistry, vol. 89(9), pp.5030-5035, (2017) DOI: 10.1021/acs.analchem.7b00386, impact factor 6.35, international co-authored paper

37.Determination of Hexachlorocyclohexane by Gas Chromatography Combined with Femtosecond Laser Ionization Mass Spectrometry, X. Yang, T. Imasaka, A. Li, T. Imasaka,Journal of the American Society for Mass Spectrometry, vol. 27, pp.1999-2005 (2016) DOI:10.1007/s13361-016-1497-7, impact factor 3.202

36.Determination of Fragrance Allergens by Ultraviolet Femtosecond Laser Ionization Mass Spectrometry,S. Shibuta, T. Imasaka, T. Imasaka,Analytical Chemistry, vol. 88, pp.10693-10700 (2016) DOI:10.1021/acs.analchem.6b03229, 2016 impact factor 6.35

35.Determination of Polycyclic Aromatic Hydrocarbons and Their Nitro-, Amino- Derivatives Absorbed on Particulate Matter 2.5 by Multiphoton Ionization Mass Spectrometry Using Far-, Deep-, and Near-Ultraviolet Femtosecond Lasers,Y. Tang, T. Imasaka, S. Yamamoto, T. Imasaka,Chemosphere, vol. 152, pp. 252-258 (2016) DOI:10.1016/j.chemosphere.2016.02.114, impact factor 5.108

34.A Simple Method for Evaluation of Pulse Width of an Ultraviolet Femtosecond Laser Used in Two-Photon Ionization Mass Spectrometry,T. Imasaka, A. Hamachi, T. Okuno, T. Imasaka,Applied Sciences-Basel, vol. 6, 136 (2016) DOI:10.3390/app6050136, impact factor 2.217

33.Detection of Polychlorinated Biphenyls in Transformer Oils in Vietnam by Multiphoton Ionization Mass Spectrometry Using a Far-Ultraviolet Femtosecond Laser as an Ionization Source, V. T. T. Duong, V. Duong, N. T. H. Lien, T. Imasaka, Y. Tang, S. Shibuta, A. Hamachi, D. Q. Hoa, T. Imasaka,Talanta, vol. 149, pp. 275-279 (2016) DOI: 10.1016/j.talanta.2015.11.054, impact factor 4.916, 国際共著

32.Analysis of Parent/Nitrated Polycyclic Aromatic Hydrocarbons in Particulate Matter 2.5 Based on Femtosecond Ionization Mass Spectrometry,N. Itouyama, T. Matsui, S. Yamamoto, T. Imasaka, T. Imasaka,Journal of the American Society for Mass Spectrometry, JASMS, vol. 27, pp. 293-300 (2016) DOI: 10.1007/s13361-015-1276-x, impact factor 3.202

31.Multiphoton Ionization Mass Spectrometry of Nitrated Polycyclic Aromatic Hydrocarbons,Y. Tang, T. Imasaka, S. Yamamoto, T. Imasaka,Talanta, vol. 140, pp. 109-114 (2015) DOI:10.1016/j.talanta.2015.03.027, impact factor 4.916

30.Autocorrelation and Frequency-Resolved Optical Gating Measurements Based on the Third Harmonic Generation in a Gaseous Medium,Y. Takao, T. Imasaka, Y. Kida, T. Imasaka,Applied Sciences, vol. 5, pp. 136-144 (2015) DOI: 10.3390/app5020136, impact factor 2.217

29.Resonant and Nonresonant Multiphoton Ionization Processes in Mass Spectrometry of Explosives A. Hamachi, T. Okuno, T. Imasaka, Y. Kida, T. Imasaka,Analytical Chemistry, vol. 87, pp. 3027-3031(2015) DOI: 10.1021/ac504667t. impact factor 6.35

28. Asimple Method for the Measurement of the Optical Pulse Width On-Site the Mass Spectrometer, T. Imasaka, A. Hamachi, T. Okuno, T. Imasaka,CLEO: 2015 OSA Technical Digest(online) (Optical Society of America, 2015), paper JTu5A.7, DOI: 10.1364/CLEO_AT.2015.JTu5A.7

27. Determination of Triacetone Triperoxide Using Ultraviolet Femtosecond Multiphoton Ionization Time-of-Flight Mass Spectrometry, R. Ezoe, T. Imasaka, T. Imasaka,Analytica Chimica Acta, vol. 853, pp.508-513 (2015) DOI: 10.1016/j.aca.2014.10.045, impact factor 5.526

26.An Evaluation of the Spectral Properties for Nerve Agents for Laser Ionization Mass Spectrometry, T. Imasaka, T. Imasaka,Analytical Science, vol. 30(12), pp. 1113-1120 (2014) DOI: 10.2116/analsci.30.1113, impact factor 1.618

25.Autocorrelator for Measuring an Ultrashort Optical Pulse Width in the Ultraviolet Region Based on Two-Photon Ionization of an Organic Compound, T. Okuno, T. Imasaka, Y. Kida, T. Imasaka,Optics Communication, vol. 310, pp. 48-52 (2014) JDOI: 10.1016/j.optcom.2013.07.055, impact factor 1.961

24.The Search for a Molecule to Measure an Autocorrelation Trace of the Second/Third Harmonic Emission of a Ti:sapphire Laser Based on Two-Photon Resonant Excitation and Subsequent One Photon Ionization, T.Imasaka, T. Okuno, T. Imasaka,Appl. Physics B: Lasers and Optics, vol. 113, no. 4, pp. 543-549 (2013) DOI: 10.1007/s00340-013-5505-3, impact factor 1.769

23. Searching for a Molecule with a Wide Frequency Domain for Non-Resonant Two-Photon Ionization to Measure the Ultrashort Optical Pulse Width, T. Imasaka, T. Imasaka,Optics Communications, vol.285, pp.3514-3518 (2012) DOI: 10.1016/j.optcom.2012.04.015, impact factor 1.961

22.Molecules with a One Octave Frequency Domain for the Measurement of the 1-fs Optical Pulse Width, T. Imasaka, T. Imasaka, Proc. of the 2012 Conference on Lasers and Electro-Optics (CLEO) (2012), Pres. Number: JTh2A.15

21.Multiphoton Ionization/Mass Spectrometry of Polybrominated Diphenyl Ethers, O. Shitamichi, T. Imasaka, T. Uchimura, T. Imasaka,Analytical Methods, Vol.3, pp. 2322-2327 (2011) DOI: 10.1039/c1ay05355h, impact factor 2.378

20.Analysis of Pesticides by Gas Chromatography/Multiphoton Ionization/Mass Spectrometry Using a Femtosecond Laser, L. Adan, T. Imasaka, T. Uchimura, T. Imasaka,Analytica Chimica Acta, vol.701, pp.52-59 (2011) DOI: 10.1016/j.aca.2011.06.003, impact factor 5.256

19.Gas Chromatography/Femtosecond Multiphoton Ionization/Time-of-Flight Mass Spectrometry of Dioxins, Y. Watanabe-Ezoe, X. Li, T. Imasaka, T. Uchimura, T. Imasaka,Analytical Chemistry, vol. 82(15), pp.6519-6525 (2010) DOI: 10.1021/ac1009063, impact factor 6.35

18.Enhancement of Molecular Ions in Mass Spectrometry Using an Ultrashort Optical Pulse in Multiphoton Ionization, T. Shimizu, Y. Watanabe-Ezoe, S. Yamaguchi, H. Tsukatani, T. Imasaka, S. Zaitsu, T. Uchimura, T. Imasaka,Analytical Chemistry, vol. 82(9), pp.3441–3444 (2010) DOI: 10.1021/ac1003773, impact factor 6.35

17.The S1<-S0 0-0 Transition Energies of Polychlorinated Dibenzofurans (PCDFs) Calculated Using CIS(D) and MP2 with Correction for Correlation Energies, S. Hirokawa, T. Imasaka, T. Imasaka,Journal of Molecular Structure:THEOCHEM, vol.915(1-3), pp.79-85 (2009) DOI: 10.1016/j.theochem.2009.08.021, impact factor 1.403

16.Gas Chromatography/Time-of-Flight Mass Spectrometry of Triacetone Triperoxide Based on Femtosecond Laser Ionization,S. Yamaguchi, T. Uchimura, T. Imasaka, T. Imasaka,Rapid Communications in Mass Spectrometry, vol. 23(19), pp.3101–3106 (2009) DOI: 10.1002/rcm.4225, impact factor 2.045

15.Selective Ionization of 2,4-Xylenol in Mass Spectrometry Using a Tunable Laser and Supersonic Jet Technique, H. Tsukatani, H. Okudaira, T. Uchimura, T. Imasaka, T. Imasaka,Analytical Sciences, vol. 25(5), pp.599-604 (2009)DOI: 10.2116/analsci.25.599, impact factor 1.618

14.Near-Ultraviolet Femtosecond Laser Ionization of Dioxins in Gas Chromatography/ Time-of-Flight Mass Spectrometry, S. Yamaguchi, F. Kira, Y. Miyoshi, T. Uchimura, Y. Watanabe-Ezoe, S. Zaitsu, T. Imasaka, T. Imasaka,Analytica Chimica Acta, vol.632(2), pp.229-233 (2009)DOI: 10.1016/j.aca.2008.11.005, impact factor 5.256

13.Data Processing Technique in Gas Chromatography/Time-of-Flight Mass Spectrometry, T. Imasaka, N. Nakamura, Y. Sakoda, S. Yamaguchi, Y. Watanabe-Ezoe, T. Uchimura, T. Imasaka,Analyst, vol. 134(4), pp.712-718 (2009) DOI: 10.1039/b815630a impact factor 4.019

12.Gas Chromatography/Multiphoton Ionization/Mass Spectrometry of Pentachlorodibenzofurans in Soils,Y. Watanabe-EzoeE, N. Nakamura, T. Uchimura, S. Yamaguchi, T. Imasaka, T. Imasaka,Organohalogen Compounds, vol.70, pp.2396-2399 (2008)

11.Ab initio MO Study on the S1S0 Origin Transition Energies of Polychlorodibenzofurans (PCDFs), T. Imasaka, S. Hirokawa, T. Imasaka,Journal of Molecular Structure:THEOCHEM, vol.774(1-3), pp.7-12 (2006) DOI: 10.1016/j.theoshem.2006.07.005, impact factor 1.403

10.Conformational Changes and S1<- S0 Origin Transition Energies: Polychlorinated Biphenyls (PCBs), S. Hirokawa, T. Imasaka, Y. Oyakawa, M. Oishi, T. Imasaka,Journal of Molecular Structure:THEOCHEM, vol.772(1-3), pp.31-37 (2006)DOI: 10.1016/j.theochem.2006.06.009, impact factor 1.403

9.Chlorine Substitution Pattern, Molecular Electronic Properties, and the Nature of Ligand-Receptor Interaction, Quantitative Property-Activity Relationships of Polychlorinated Dibenzofurans, S. Hirokawa, T. Imasaka, T. Imasaka,Chemical Research in Toxicology, vol. 18(2), pp.232-238 (2005).DOI: 10.1021/tx049874f, impact factor 3.278

8.Additivity of Electron Correlation Energy and the Ab initio MO Calculation of (0,0) S1 <- S0 Transition Energies : Polychlorinated Dibenzofuran, T. Imasaka, S. Hirokawa,Journal of Molecular Structure:THEOCHEM, vol.710(1-3), pp.19-23 (2004) DOI: 10.1016/j.theochem.2004.08.003, impact factor 1.403

7.Ab initio MO Study on the S1 <- S0 Transitions of Polychlorinated Dibenzo-p-Dioxins, S. Hirokawa, T. Imasaka, Y. Urakami,Journal of Molecular Structure:THEOCHEM, vol.622(3), pp.229-237 (2003)DOI: 10.1016/S0166-1280(02)00648-6, impact factor 1.403

6.S0 and S1 States of Monochlorophenols: Ab initio CASSCF MO Study, S. Hirokawa, T. Imasaka, T. Imasaka,The Journal of Physical Chemistry A, vol. 105(40), pp.9252 -9257 (2001)DOI: 10.1021/jp011533c, impact factor 2.847

5.Mean-Field Theory of the Orientational Ordering of Dipolar Guest Molecules in Hydroquinone Clathrate of SO2 and D2S, T. Imasaka, S. Hirokawa, Journal of the Physical Society of Japan, vol. 70(9), pp.2603-2612 (2001)DOI: 10.1143/JPSJ.70.2603, impact factor 1.485

4.Effects of a Crystal Field on the Orientational Phase Transition in a System of Dipoles: A Mean-Field Study of SO2--Hydroquinone Clathrate, T. Imasaka, S. Hirokawa,Journal of the Physical Society of Japan, vol. 66(5), pp.1364-1370 (1997) DOI: 10.1143/JPSJ.66.1364, impact factor 1.485

3.Quantum Effects on the Orientational Ordering of H2S and D2S Molecules Enclosed in Quinol Clathrate, S. Hirokawa, T. Imasaka, T. Matsuo,Journal of the Physical Society of Japan, vol. 63(2), pp. 593-601 (1994) DOI: 10.1143/JPSJ.63.593, impact factor 1.485

2.Effect of a Crystal Field on the Orientational Ordering of H2S Molecules Enclosed in -Quinol Clathrate, S. Hirokawa, T. Imasaka (Iwasaki),Journal of the Physical Society of Japan, vol. 59(10), pp. 3797-3798 (1990) Oct.DOI: 10.1143/JPSJ.59.3797 impact factor 1.485

1.Orientational Order of Guest H2S Molecules in -Quinol Clathrate, S. Hirokawa, T. Iwasaki,Journal of the Physical Society of Japan, vol. 57(11), pp. 3843 -3850 (1988) DOI: 10.1143/JPSJ.57.3843 impact factor 1.485

 

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