Shuhei Nagaoka
Keio University
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Publication
Featured researches published by Shuhei Nagaoka.
Journal of the American Chemical Society | 2011
Shuhei Nagaoka; Kaori Ikemoto; Kazuki Horiuchi; Atsushi Nakajima
Soft- and reactive-landing of gas-phase synthesized cationic Cr(aniline)(2) complexes onto self-assembled monolayers of methyl-terminated (CH(3)-SAM) and carboxyl-terminated (COOH-SAM) organothiolates coated on gold were performed at hyperthermal collision energy (5-20 eV). The properties of the Cr(aniline)(2) complexes on the SAM surfaces were characterized using infrared reflection absorption spectroscopy (IRAS) and temperature-programmed desorption (TPD), together with theoretical calculations based on density functional theory (DFT). For the CH(3)-SAM, the Cr(aniline)(2) complexes were embedded inside the SAM matrix in a neutral charge state, keeping a sandwich structure. For the COOH-SAM, the IRAS and TPD study revealed that the amine-containing Cr(aniline)(2) complexes were bound to the SAM surface in two forms of physisorption and chemical linking through an amide bond. In the desorption, the latter form appeared as the reaction product between organothiolates and Cr(aniline)(2) above 400 K, where the organothiolate molecules, forming the SAM, were desorbed from the gold surface. The results show that the hyperthermal depositions onto a COOH-SAM bring about reactive-landing followed by covalent linking of an amide bond between the amine-containing Cr(aniline)(2) complexes to the carboxyl-terminated SAM surface, in which the binding sites can be separated from the functional sites of the d-π interaction.
Journal of Physical Chemistry B | 2006
Masaaki Mitsui; Shuhei Nagaoka; Takeshi Matsumoto; Atsushi Nakajima
Journal of the American Chemical Society | 2007
Shuhei Nagaoka; Takeshi Matsumoto; Kaori Ikemoto; Masaaki Mitsui; Atsushi Nakajima
Journal of Physical Chemistry B | 2006
Shuhei Nagaoka; Takeshi Matsumoto; Eiji Okada; Masaaki Mitsui; Atsushi Nakajima
Journal of Physical Chemistry C | 2008
Shuhei Nagaoka; Kaori Ikemoto; Takeshi Matsumoto; Masaaki Mitsui; Atsushi Nakajima
Journal of Physical Chemistry C | 2008
Shuhei Nagaoka; Kaori Ikemoto; Takeshi Matsumoto; Masaaki Mitsui; Atsushi Nakajima
Journal of Physical Chemistry C | 2009
Kaori Ikemoto; Shuhei Nagaoka; Takeshi Matsumoto; Masaaki Mitsui; Atsushi Nakajima
European Physical Journal D | 2009
T. Matsumoto; Shuhei Nagaoka; Kaori Ikemoto; Masaaki Mitsui; M. Ara; Hirokazu Tada; Atsushi Nakajima
European Physical Journal D | 2005
Shuhei Nagaoka; E. Okada; S. Doi; Masaaki Mitsui; A. Nakajima
Journal of Physical Chemistry C | 2011
Takeshi Iwasa; Kazuki Horiuchi; Masaya Shikishima; Yuji Noguchi; Shuhei Nagaoka; Atsushi Nakajima