Zhehui Jin

National Institute for Materials Science

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Multistep molecular and macromolecular assembly for the creation of complex nanostructures

Chemical Physics Reviews (2022)

Dong Yang Norihiko Sasaki Takuma Shimada Zhehui Jin Masayuki Takeuchi

In this short review, we provide an overview of multistep molecular and macromolecular assembly in syntheses of higher-order structures that are unobtainable under thermodynamic control. As in the case of organic/macromolecular chemistry, a synthetic scheme is designed such that a series of assembly processes eventually leads to a complex structure. The recent progress in this research field has been made based on the mechanistic understandings from viewpoints of both thermodynamics and kinetics. We also describe relevant systems which make use of advanced experimental apparatuses such as optical tweezers, high-speed atomic force microscopy, and so on. The unprecedented structures obtainable in this way might play a pivotal role in bridging the hierarchical levels from the molecular scale to the macroscopic world, leading to new functional supramolecular materials.

Viewpoints

Molecular machine

10.1063/5.0079750

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Citations (5)

An Iron(II) Complex of a Tripodal 2,2′-Bipyridine with Perfluoroalkyl Linkers Showing Anion-dependent fac/mer Isomer Ratio

Chemistry Letters (2022)

Yusuke Chiba Zhehui Jin Takashi Nakamura Tatsuya Nabeshima

An iron(II) complex of a novel tripodal 2,2′-bipyridine ligand bearing perfluoroalkyl linkers showed anion-dependent fac/mer isomerization. In the complexes with bromide and triflate anions, the mer isomer was preferentially formed. The bistriflimide anion shifted the equilibrium to the fac isomer. The different isomerization behaviors were probably caused by difference in the hydrogen bond modes of the isomers with anions. An iron(II) complex of a novel tripodal 2,2′-bipyridine ligand bearing perfluoroalkyl linkers showed anion-dependent fac/mer isomerization. In the complexes with bromide and triflate anions, the mer isomer was preferentially formed. The bistriflimide anion shifted the equilibrium to the fac isomer. The different isomerization behaviors were probably caused by differences in the hydrogen bond mode of the isomers with anions.

Trifluoromethanesulfonate

Bipyridine

Tripodal ligand

10.1246/cl.220314

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Citations (2)

Two‐Dimensional Living Supramolecular Polymerization: Improvement in Edge Roughness of Supramolecular Nanosheets by Using a Dummy Monomer

Chemistry - A European Journal (2023)

Zhehui Jin Norihiko Sasaki Natsuki Kishida Masayuki Takeuchi Yutaka Wakayama

Supramolecular polymers are formed through nucleation (i. e., initiation) and polymerization processes, and kinetic control over the nucleation process has recently led to the realization of living supramolecular polymerization. Changing the viewpoint, herein we focus on controlling the polymerization process, which we expect to pave the way to further developments in controlled supramolecular polymerization. In our previous study, two-dimensional living supramolecular polymerization was used to produce supramolecular nanosheets with a controlled area; however, these had rough edges. In this study, the growth of the nanosheets was controlled by using a 'dummy' monomer to produce supramolecular nanosheets with smoothed edges.

Supramolecular Polymers

10.1002/chem.202302181

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Citations (4)