(46)  K. Hori, S. Nawate, M. Matsumoto, Y. Tsuchida, K. Tsunashima, H. Yamada, "Dependence of Cation Structures on Electrochemical

        Polymerization of Aniline in Phosphonium Ionic Liquids", 2024 Pacific Rim Meeting on Electrochemical and Solid-State Science,

        Oct 7, 2024, Honolulu, Hawaii, USA.  

​

(45)  K. Kawabata, S. Azuma, J. Shimada, Y. Tsuchida, K. Tsunashima, T. Sugahara, A. Tani, "Introduction of Cyclic Structures into

        Phosphonium Salts As Potential Guest Substances for Ionic Semiclathrate Hydrates", 2024 Pacific Rim Meeting on

        Electrochemical and Solid-State Science, Oct 7, 2024, Honolulu, Hawaii, USA.  

 

(44)  S. Kikuchi, K. Nishikawa, T. Kawaji, K. Tsunashima, H. Hotta, A. Yokobiki, Y. Tsuchida, Y. Funasako, H. Yamada, "Physicochemical

        and Thermal Behaviors of Room-Temperature Phosphonium Ionic Liquids Based on Fluorosulfonyl(trifluoromethylsulfonyl)amide

        Anion as Potential Electrolytes", 2024 Pacific Rim Meeting on Electrochemical and Solid-State Science, Oct 7, 2024, Honolulu,

        Hawaii, USA.  

​

(43)  H. Akamatsu, S. Kubo, S. Kikuchi, K. Hotta, A. Yokobiki, Y. Tsuchida, K. Tsunashima, Y. Funasako, Y. Okuno, H. Yamada, A. Tani,

        "Dependence of Carboxylate Anions on Physicochemical Properties of Tributyloctylphosphonium-Based Ionic Liquids",

        2024 Pacific Rim Meeting on Electrochemical and Solid-State Science, Oct 7, 2024, Honolulu, Hawaii, USA.  

​

(42) K. Hori, S. Nawate, M. Matsumoto, Y. Tsuchida, K. Tsunashima, H. Yamada, "Design of Phosphonium Ionic Liquids for

        Electrochemical Polymerization of Aniline", 10th International Symposium on Molecular Thermodynamics and Molecular

        Simulation, Aug 28, 2024, Koriyama, Fukushima.

 

(41) K. Kawabata, S. Azuma, J. Shimada, Y. Tsuchida, K. Tsunashima, T. Sugahara, A. Tani, "Phase Equilibrium Behavior of

        Semiclathrate Hydrates Based on Quaternary Phosphonium Bromides Containing Alicyclic Structures", 10th International

        Symposium on Molecular Thermodynamics and Molecular Simulation, Aug 28, 2024, Koriyama, Fukushima.

 

(40) H. Akamatsu, S. Hasegawa, S. Kikuchi, Y. Tsuchida, K. Tsunashima, H. Hotta, A. Yokobiki, Y. Funasako, Y. Okuno, H. Yamada,

       A. Tani, "Preparation and Physicochemical Characterization of Room-Temperature Ionic Liquids Based on Tributyloctyl-

       phosphonium Cation and Alkanesulfonate Anions", 10th International Symposium on Molecular Thermodynamics and

       Molecular Simulation, Aug 28, 2024, Koriyama, Fukushima.

 

(39) H. Akamatsu, K. Tsunashima, Y. Tsuchida, Y. Okuno, H. Yamada,, "Preparation and Physicochemical Characterization of

       Phosphonium-Based Ionic Liquids Containing Carboxylate Anions", 2023 Joint Symposium on Molten Salts, Nov 14,

       2023, Kyoto.

 

(38) K. Tsunashima, S. Kikuchi, K. Nishikawa, Y. Tsuchida,  T. Kawaji, Y. Funasako, H. Yamada, "Comparative Study on Transport

       Property of Asymmetric Fluorosulfonyl(trifluoromethyl-sulfonyl)amide-Based Phosphonium Ionic Liquids",

       244th The Electrochemical Society Fall Meeting, Oct 11, 2023, Gothenburg, Sweden.

 

(37) H. Akamatsu, K. Tsunashima, Y. Tsuchida, Y. Okuno, H. Yamada, "Preparation and Physicochemical Characterization of

       Phosphonium-Based Ionic Liquids Containing Carboxylate Anions", 243rd The Electrochemical Society Spring Meeting,

       May 31, 2023, Boston, MT, USA. (Digital)

 

(36) K. Tsunashima, S. Hasegawa, H. Akamatsu, Y. Tsuchida, Y. Okuno, H. Yamada, "Preparation and Physicochemical

       Characterization of Hydrophilic Alkanesulfonate-Based Phosphonium Ionic Liquids", The 1st KOSEN Research International

       Symposium (KRIS2023), Mar 1, 2023, Tokyo.

​

(35) H. Akamatsu, K. Tsunashima, Y. Tsuchida, Y. Okuno, H. Yamada, "Phosphonium Ionic Liquids Based on Carboxylate Anions

       As Potential Electrolyte Materials", The 1st KOSEN Research International Symposium (KRIS2023), Mar 1, 2023, Tokyo.

 

(34) S. Azuma, K. Tsunashima, J. Shimada, T. Sugahara, A. Tani, "Phosphonium Salts As Potential Guest Substances for Ionic

       Semiclathrate Hydrates", 242nd The Electrochemical Society Fall Meeting, Oct 12, 2022, Atlanta, GA, USA. (Digital)

 

(33) K. Tsunashima, S. Hasegawa, Y. Okuno, H. Yamada, "Physicochemical Characterization of Sulfonate-Based Phosphonium

       Ionic Liquids", 242nd The Electrochemical Society Fall Meeting, Oct 11, 2022, Atlanta, GA, USA. (Digital)

 

(32) K. Tsunashima, N. Yasugi, J. Shimada, T. Higashi, Y. Sakaguchi, H. Yamada, A. Tani, "Characterization of Polythiophene

       derivatives electrochemically doped in phosphonium ionic liquids", The 14th International Symposium on Organic Reactions,

       Apr 25, 2020, Yokohama.

 

(31) D. Nomizu, K. Tsunashima, Y. Sakaguchi, T. Higashi, H. Yamada, M. Matsumiya, "Ionic Conductivity and Thermal Stability

       of Polyethylene Glycol Based Polymer Electrolytes Containing Phosphonium Ionic Liquids", 236th The Electrochemical

       Society Fall Meeting, Oct 15, 2019, Atlanta, GA, USA.

​

(30) N. Yasugi, K. Tsunashima, T. Higashi, Y. Sakaguchi, H. Yamada, M. Matsumiya, "Electrochemical Behavior of Selenophene

       in Quaternary Ammonium and Phosphonium Based Ionic Liquids", 236th The Electrochemical Society Fall Meeting,

       Oct 14, 2019, Atlanta, GA, USA.

 

(29) D. Nomizu, Y. Tsuchida, K. Tsunashima, H. Yamada, M. Matsumiya, "Improvement of Conductivity of Polymer Electrolytes

       Based on Phosphonium Ionic Liquids", 6th Asian-Pacific Congress on Ionic Liquids & Green Processes, Nov 1, 2018,

       Yonago, Tottori.

 

(28) J. Shimada, T. Sugahara, H. Yamada, K. Tsunashima, "Ionic Conductivities in Ionic Clathrate Hydrates Based on Quaternary

       Ammonium and Phosphonium Salts", 6th Asian-Pacific Congress on Ionic Liquids & Green Processes, Nov 1, 2018,

       Yonago, Tottori.

 

(27) K. Tsunashima, N. Yasugi, K. Nishihata, M. Matsumiya, "Electrochemical Behavior of Polythiophene Derivatives in

       Phosphonium Ionic Liquids", 6th Asian-Pacific Congress on Ionic Liquids & Green Processes, Nov 1, 2018, Yonago, Tottori.

 

(26) M. Shimada, T. Sugahara, K. Tsunashima, "Thermodynamic Stabilities of Tetra-n-butylphosphonium + Gas Semiclathrate

       Hydrate Systems", 8th International Symposium on Molecular Thermodynamics and Molecular Simulation, Sep 7, 2018,

       Narashino, Chiba.

​

(25) J. Shimada, M. Shimada, T. Sugahara, K. Tsunashima, "Phase Equilibrium Relations of Semiclathrate Hydrates Based on

       Tetra-n-butylphosphonium Formate, Acetate, Propionate and Lactate", 8th International Symposium on Molecular

       Thermodynamics and Molecular Simulation, Sep 7, 2018, Narashino, Chiba.

 

(24)  K. Tsunashima, Y. Tsuchida, D. Nomizu, H. Yamada, M. Matsumiya, "Effect of phosphonium ionic liquids on thermal stability

        of polymethyl methacrylate polymers", 8th International Symposium on Molecular Thermodynamics and Molecular Simulation,

        Sep 7, 2018, Narashino, Chiba.

 

(23)  M. Shimada, J. Shimada, K. Tsunashima, C. Aoyama, "Methodology to Collect Natural Gas from Methane Hydrate Deposits

         Using Sunlight: Design of Direct Sunlight Exposure System", 2017 American Geophysical Union Fall Meeting, Dec 11, 2017,

         New Orleans, LA, USA.

 

(22)  J. Shimada, M. Shimada, K. Tsunashima, C. Aoyama, "Utilization of Sunlight into Methane Hydrate Production: Feasibility Study

        Based on Energy Balance Estimation", 2017 American Geophysical Union Fall Meeting, Dec 11, 2017, New Orleans, LA, USA.

​

(21)  J. Shimada, K. Tsunashima, M. Ue, K. Iwasaki, T. Tsuda, S. Kuwabata, N. Hirai, H. Kanematsu, T. Kogo, A. Ogawa,

        "Physical and Electrochemical Properties of Ionic Liquids Based on Quaternary Phosphonium Cations and Carboxylate Anions

        as Electrolytes", 2016 Pacific Rim Meeting on Electrochemical and Solid-State Science, Oct 4, 2016, Honolulu, Hawaii, USA.  

​

(20)  K. Nishihata, K. Tsunashima, Y. Ono, M. Matsumiya, "Electropolymerization of Thiophenes in a Bis(fluorosulfonyl)amide Based

        Phosphonium Ionic Liquid", 2016 Pacific Rim Meeting on Electrochemical and Solid-State Science, Oct 4, 2016,

        Honolulu, Hawaii, USA.           

​

(19)  K. Tsunashima, N. Minami, Y. Ono, M. Imoto, S. Mori, M. Takeda, "Electrochemical Behavior of Aromatic Diamines and the Growth

        of Conducting Films", 2016 Pacific Rim Meeting on Electrochemical and Solid-State Science, Oct 5, 2016, Honolulu, Hawaii, USA.     

​

(18)  K. Tsunashima, K. Nishihata, K. Honma, D. Ito, Y. Ono, M. Matsumiya, "Design of phosphonium ionic liquids for electrosynthesis

        of conducting polymers", Aug 24, 2016, The Hague, Netherlands.         

​

(17)  K. Nishihata, K. Tsunashima, M. Matsumiya, Y. Ono, "Tetracyanoborate Anion Based Phosphonium Ionic Liquids as Electrolytes

        for Pyrrole Electropolymerization", 229th The Electrochemical Society Spring Meeting, May 31, 2016, San Diego, CA, USA.                   

​

(16)  K. Nishihata, K. Tsunashima, M. Matsumiya, "Preparation and physicochemical properties of phosphonium ionic liquids based on

         tetracyanoborate anion", 66th Annual Meeting of the International Society of Electrochemistry, Oct 5, 2015, Taipei, Taiwan.         

​

(15)  K. Tsunashima, H. Fujimoto, H. H. Wang, L. Curtiss, K. Amine, Y. Mizuguchi, "Electrochemical behavior of oxygen in phosphonium

        ionic liquids as lithium-air battery electrolytes", 66th Annual Meeting of the International Society of Electrochemistry, Oct 9, 2015,

        Taipei, Taiwan.             

​

(14)  K. Tsunashima, Y. Sakai, M. Matsumiya, "Physical and Electrochemical Properties of Room-Temperature Ionic Liquids Containing

        Allyl-Based Phosphonium Cations and Bis(fluorosulfonyl)amide Anion", May 26, 2015, Chicago, IL, USA.   

​

(13)  K. Tsunashima, S. Kikuchi, C. Nagai, Y. Sakai, M. Matsumiya, "Influence of Aromatic and Unsaturated Substituents on Physical

        and Electrochemical Properties of Phosphonium Ionic Liquids", 224th The Electrochemical Society Fall Meeting, Oct 29, 2013,

        San Francisco, CA, USA.          

​

(12)  K. Tsunashima, T. Matsubayashi, Y. Ono, M. Matsumiya, "Electrosynthesis of Polypyrrole in Low-Viscosity Ionic Liquids",

        2012 Pacific Rim Meeting on Electrochemical and Solid-State Science, Oct 10, 2012, Honolulu, Hawaii, USA.    

​

(11)  K. Tsunashima, H. Taguchi, F. Yonekawa, "Influence of Nonflammable Diluents on Properties of Phosphonium Ionic Liquids as

        Lithium Battery Electrolytes", 2012 Pacific Rim Meeting on Electrochemical and Solid-State Science, Oct 9, 2012,

        Honolulu, Hawaii, USA. 

​

(10)  K. Tsunashima, T. Matsubayashi, Y. Ono, "Electropolymerization of pyrrole in 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)amide

        ionic liquid", 63rd Annual Meeting of the International Society of Electrochemistry, Aug 21, 2012, Prague, Czech Republic.  

       

(9)  K. Tsunashima, K. Kudo, "Electrochemical behavior of quaternary phosphonium ionic liquids based on benzotriazolate anion",

      63rd Annual Meeting of the International Society of Electrochemistry, Aug 20, 2012, Prague, Czech Republic.

​

(8)  K. Tsunashima, S. Kikuchi, Y. Yamanaka, M. Matsumiya, Y. Ono, "Physical and electrochemical properties of ionic liquids based

      on p-bond-containing phosphonium cations", 63rd Annual Meeting of the International Society of Electrochemistry, Aug 20, 2012,

      Prague, Czech Republic.      

​

(7)  K. Tsunashima, H. Taguchi, A. Kawabata, F. Yonekawa, S. Kodama, "Properties of phosphonium ionic liquid-based electrolytes for

      lithium secondary batteries", 63rd Annual Meeting of the International Society of Electrochemistry, Aug 20, 2012,

      Prague, Czech Republic. 

​

(6)  K. Tsunashima, A. Kawabata, H. Taguchi, F. Yonekawa, S. Kodama, "Highly Conductive and Nonflammable Ionic Liquid Electrolytes

      Containing Phosphazene Compounds for Lithium Secondary Batteries", 220th The Electrochemical Society Fall Meeting, Oct 10, 2011,  

      Boston, MA, USA.

​

(5)  K. Tsunashima, S. Yamamoto, Y. Kunugi, S. Kodama, "Physical and electrochemical characterization of room-temperature

      phosphonium ionic liquids based on cyano-containing anions", Sep 12, 2011, Niigata, Japan.            

​

(4)  K. Tsunashima, A. Kawabata, M. Matsumiya, S. Kodama, "Physical and electrochemical properties of bis(fluorosulfonyl)amide-based

      phosphonium ionic liquids", 62nd Annual Meeting of the International Society of Electrochemistry, Sep 13, 2011, Niigata, Japan.

    

(3)  K. Tsunashima, A. Kawabata, M. Matsumiya, S. Kodama, Y. Kunugi, "New Class of Bis(fluorosulfonyl)amide Ionic Liquids Based on

      Quaternary Phosphonium Cations", 4th International Congress on Ionic Liquids, Jun 17, 2011, Arlington, Virginia, USA.

​

(2)  K. Tsunashima, M. Sugiya, Y. Kunugi, "New class of room-temperature phosphonium ionic liquids based on a dicyanamide anion",       

      2010 International Chemical Congress of Pacific Basin Societies (PACIFICHEM 2010), Dec 16, 2010, Honolulu, Hawaii, USA.

​

(1)  K. Tsunashima, S. Kodama, M. Sugiya, Y. Ono, "Effect of Substituents on Physical and Electrochemical Properties of Phosphonium

      Ionic Liquids as Lithium Battery Electrolytes", 4th International Conference on Polymer Batteries and Fuel Cells, Aug 3, 2009,

      Yokohama, Japan.