A02 Junpei Yuasa

Junpei Yuasa		Participating A02
Affiliation	Department of Applied Chemistry, Faculty of Science Division I, Tokyo University of Science
Position	Associate Professor
Contact	yuasaj@rs.tus.ac.jp
HP	http://www.rs.tus.ac.jp/yuasaj/member.html
Research Project	Development of supramolecular lanthanide assemblies
Abstract	The aim of this research project is development of supramolecular lanthanide(III) assemblies showing excellent chiroptical performance such circular dichroism and circular polarized luminescence. The lanthanide(III) complexes show the remarkable spectroscopic features of its intra 4f emission; such as, narrow emission bands, large Stokes shifts enabling invisible security tagging/printing, and a wide variety of emission wavelengths from the visible to near-infrared (NIR) spectral regions. However, these unique spectroscopic features have been exploited by mononuclear lanthanide(III) complexes. This research project would expand the scope of chiroptical properties of lanthanide(III) (typically circular polarized luminescence) by development of coordination-driven self-assembly of the lanthanide(III) complex.
Research Areas	Photochemistry, Supramolecular Chemistry, Coordination Chemistry
Keywords	Lanthanide Complex, Circular Polarized Luminescence, Coordination-Driven Self-Assembly

2020

[12] Remarkable self-sorting selectivity in covalently linked homochiral and heterochiral pairs driven by Pd₂L₄ helicate formation,
Daiji Ogata; Junpei Yuasa, Chem. Commun., 56, 8679 – 8682 , 2020
DOI: 10.1039/D0CC03539D.

[11] Zinc Ion-Stabilized Charge-Transfer Interactions Drive Self- or Complementary Molecular Recognition,
Shuta Iseki; Kohei Nonomura; Sakura Kishida; Daiji Ogata; Junpei Yuasa, J. Am. Chem. Soc., 142, 37, 15842 – 15851, 2020
DOI: 10.1021/jacs.0c05940.

2019

[10] Dynamic Open Coordination Cage from Non-symmetrical Imidazole-Pyridine Ditopic Ligands for Turn-On/Off Anion Binding,
Daiji Ogata; Junpei Yuasa, Angew. Chem. Int. Ed., , 2019
DOI: 10.1002/anie.201911097.

[9] Competing Allosteric Mechanisms for Coordination-Directed Conformational Changes of Chiral Stacking Structures with Aromatic Rings,
Kohei Nonomura; Junpei Yuasa, Inorg. Chem., 58, 6474 – 6484 , 2019
DOI: 10.1021/acs.inorgchem.9b00665.

[8] Off-off-on chiroptical property switching of a pyrene luminophore by stepwise helicate formation,
Yuki Imai; Junpei Yuasa, Chem. Commun., 55, 4095 – 4098, 2019
DOI: 10.1039/C9CC01138B.

[7] Supramolecular chirality transformation driven by monodentate ligand binding to coordinatively unsaturated self-assembly based on C₃-symmetric ligands,
Yuki Imai; Junpei Yuasa, Chem. Sci., 10, 4236 – 4245, 2019
DOI: 10.1039/C9SC00399A.

2018

[6] Chiroptical Inversion of Europium(III) Complexes by Changing a Remote Stereogenic Center of a C₂-Symmetric Bispyrrolidinoindoline Manifold,
Tomoaki Taniguchi; Akira Tsubouchi; Yuki Imai; Junpei Yuasa; Hiroki Oguri, J. Org. Chem., 83, 15284 – 15296 , 2018
DOI: 10.1021/acs.joc.8b02550.

[5] The effect of ligand symmetry on the ratiometric luminescence characteristics of lanthanides,
Yoshinori Okayasu; Hajime Kamebuchi; Junpei Yuasa, Dalton Trans., 47, 6779 – 6786, 2018
DOI: 10.1039/c8dt00898a.

[4] A Smart Sensing Method for Object Identification Using Circularly Polarized Luminescence from Coordination‐Driven Self‐Assembly,
Yuki Imai; Yuka Nakano; Tsuyoshi Kawai; Junpei Yuasa, Angew. Chem. Int. Ed., 57, 8973 – 8978, 2018
DOI: 10.1002/anie.201803833.

[3] Ligand-to-Ligand Interactions That Direct Formation of D₂-Symmetrical Alternating Circular Helicate,
Tan Yan Bing; Tsuyoshi Kawai; Junpei Yuasa, J. Am. Chem. Soc., 140, 10, 3683 – 3689, 2018
DOI: 10.1021/jacs.7b12663.

[2] Evaluation of Circularly Polarized Luminescence in Chiral Lanthanide Ensemble,
Yoshinori Okayasu; Junpei Yuasa, Molecular Systems Design & Engineering, 3, 66 – 72, 2018
DOI: 10.1039/c7me00082k.

2017

[1] Photoactivatable Europium Luminescence Turn-On by Photo-Oxygenation of β-Diketone Having Pyrrole Rings,
Junpei Yuasa; Takafumi Nakagawa; Yuki Kita; Ayaka Kaito; Tsuyoshi Kawai, Chem. Commun., 53, 6748 – 6751, 2017
DOI: 10.1039/C7CC03753H.