A02 Takeshi Naota

Takeshi Naota

A02 Planning


Graduate School of Engineering Science, Osaka University





Research Project

3D Assembly Control of Flexible Chiral Transition Metal Complex Aimed to Designing the New Functional Light Emitting Materials


Soichiro Kawamorita (Assistant Professor, Graduate School of Engineering Science, Osaka University)


This research aims to create functional phosphorescent materials based on the investigation on the association, aggregation and mobile properties of various transition metal complexes bearing 3D superstructures with planar chirality.   The research includes comprehensive studies on the (1) synthesis and structure of novel potentially emissive transition metal complexes with planar chirality, (2) their chromogenic properties based on the control of association/aggregation chirality and molecular mobility, and (3) application to functional emissive materials based on the control of d-π conjugation on the coordination platforms. 

Figure 1.  Various phosphorescent complexes bearing 3D superstructures with planar chirality (a) and their functional emission properties based on the association, aggregation and mobility control (b).

Research Areas

Organic Chemistry, Organometallic Chemistry


phosphorescence, photophysics, platinum complex, planar chirality


[10] Regiospecific Remote Pt–H Interactions in Oligomethylene-Vaulted (N^C^N)-Pincer Pt(II) Complexes,
Naruyoshi Komiya; Takashi Hosokawa; Junya Adachi; Ryo Inoue; Soichiro Kawamorita; Takeshi Naota, Eur. J. Inog. Chem., 2018, 44, 4771 – 4778, 2018
DOI: 10.1002/ejic.201800927.
[9] Syntheses, structures, and solid‑state phosphorescence characteristics of trans‑bis(salicylaldiminato)Pt(II) complexes bearing perpendicular N‑aryl functionalities,
Shotaro Iwata; Asami Ihara; Kumiko Hiramatsu; Junya Adachi; Soichiro Kawamorita; Takeshi Naota, Transition Metal Chemistry, 43, 115 – 125, 2018
DOI: 10.1007/s11243-017-0198-9.
[8] A direct synthetic method for (nitronyl nitroxide)-substituted p-electronic compounds via a palladium-catalyzed cross-coupling reaction with a zinc complex,
Shuichi Suzuki; Fumiya Nakamura; Takeshi Naota, Materials Chemistry Frontiers, 2, 591 – 596, 2018
DOI: 10.1039/c7qm00565b.
[7] Linker length dependence of the chromogenic properties of polymethylene-vaulted trans-bis(2-aminotroponato)palladium(II) complexes,
Tatsuya Matsuoka; Zimeng Li; Masahiro Ikeshita; Soichiro Kawamorita; Takeshi Naota, Journal of Molecular Structure, 1165, 217 – 222, 2018
DOI: g/10.1016/j.molstruc.2018.03.076.
[6] Helicity Control of Supramolecular Gel Fibers Consisting of an Achiral NiII Complex in a Chiral Nematic Solvent,
Takatoshi Maeda; Yuuki Kuwajima; Takuya Akita; Yosuke Iwai; Naruyoshi Komiya; Yoshiaki Uchida; Takeshi Naota, Chem. Eur. J., 24, 48, 12546 – 12554, 2018
DOI: 10.1002/chem.201801992.
[5] Dynamic Rotational Motions of Vaulted Chiral transBis(salicylaldiminato)palladium(II) Complexes Bearing Rigid or Flexible Carbon Chain Linkers,
Masahiro Ikeshita; Takeshi Naota, Eur. J. Inog. Chem., 4689 – 4695, 2018
DOI: 10.1002/ejic.201800666.


[4] Solid-State Fluorescence of Zwitterionic Imidazolium Pyridinolates Bearing Long Alkyl Chains: Control of Emission Properties Based on Variation of Lamellar Alignment,
Atsushi Yoshida; Masahiro Ikeshita; Naruyoshi Komiya; Takeshi Naota, Tetrahedron, , 2017
DOI: 10.1016/j.tet.2017.08.045.
[3] Convenient Spectroscopic Method for Quantitative Analysis of Trace Hydrochloric Acid in Chlorinated Organic Solvents Using 2-(1-Adamantylimino)methyl-1H-pyrrole as a Robust Indicator,
Kento Anzai; Soichiro Kawamorita; Naruyoshi Komiya; Takeshi Naota, Chem. Lett., 46, 672 – 675, 2017
DOI: 10.1246/cl.170065.


[2] Homochiral Association of Binuclear Trans-Bis(β-iminoaryloxy)Palladium(II) Complexes Doubly Linked with m-Xylylene Spacers: Drastic Linker-Dependence of the Association Chirality of Chiral Clothespin-Shaped Molecules,
Masaya Naito; Naruyoshi Komiya; Takeshi Naota, Org. Chem. Front., 3, 1286 – 1294, 2016
DOI: 10.1039/c6qo00315j.
[1] Dynamic Neighbouring Participation of Nitrogen Lone Pairs on the Chromogenic Behaviour of Trans-bis(salicylaldiminato)Pt(II) Coordination Platforms,
Takumi Hashimoto; Kanako Fukumoto; Ngoc Ha-Thu Le; Tatsuya Matsuoka; Soichiro Kawamorita; Naruyoshi Komiya; Takeshi Naota, Dalton Trans., 45, 19257 – 19268, 2016
DOI: 10.1039/C6DT04005E.