Reiji Kumai
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View article: Abrupt and Reversible Stretching in an Azobenzene Single Crystal via Thermal Phase Transition
Abrupt and Reversible Stretching in an Azobenzene Single Crystal via Thermal Phase Transition Open
Mechanically responsive crystals are promising for actuators and microrobotics; however, achieving large reversible deformation with high durability remains challenging. Herein, A single‐component azobenzene crystal is reported to exhibit …
View article: Binaphthyl‐Aniline‐Based Chiral Magnetic Polymer
Binaphthyl‐Aniline‐Based Chiral Magnetic Polymer Open
Magnetoactive polymers based on 1,1′‐binaphthyl‐2,2′‐diamine with axial chirality were synthesized through cross‐coupling polycondensation of the Buchwald–Hartwig reaction and subsequent oxidation with m ‐chloroperoxybenzoic acid. The poly…
View article: Correlation between ferroelectricity and torsional motion of acetyl groups in tris(4-acetylphenyl)amine observed by muon spin relaxation
Correlation between ferroelectricity and torsional motion of acetyl groups in tris(4-acetylphenyl)amine observed by muon spin relaxation Open
It is demonstrated by muon spin relaxation and resonance experiments that the switchable spontaneous polarization of the organic ferroelectric compound tris(4-acetylphenyl)amine is governed by the local molecular dynamics of the acetyl gro…
View article: Preparation of an optically active ferromagnet composite via the in-situ synthesis of Fe[Fe(CN)6] in a helical polymer liquid crystal
Preparation of an optically active ferromagnet composite via the in-situ synthesis of Fe[Fe(CN)6] in a helical polymer liquid crystal Open
This study introduces a novel method for blending inorganic materials and polymer liquid crystals. The proposed method involves the in-situ preparation of Fe[Fe(CN)6] in hydroxypropyl cellulose to form a helical polymer liquid crystal. The…
View article: Exploration and development of molecule-based printed electronics materials: an integrated approach using experimental, computational, and data sciences
Exploration and development of molecule-based printed electronics materials: an integrated approach using experimental, computational, and data sciences Open
The challenge in developing molecule-based electronic materials lies in the uncontrollable or unpredictable nature of their crystal structures, which are crucial for determining both electrical properties and thin-film formability. This re…
View article: Close Stacking of Antiaromatic Ni(II) Norcorrole Originating from a Four-Electron Multicentered Bonding Interaction
Close Stacking of Antiaromatic Ni(II) Norcorrole Originating from a Four-Electron Multicentered Bonding Interaction Open
A π-conjugated molecule with one electronic spin often forms a π-stacked dimer through molecular orbital interactions between two unpaired electrons. The bonding is recognized as a multicentered two-electron interaction between the two π-c…
View article: Stability of ternary interfaces and its effects on ideal switching characteristics in inverted coplanar organic transistors
Stability of ternary interfaces and its effects on ideal switching characteristics in inverted coplanar organic transistors Open
Inverted coplanar or bottom-gate bottom-contact (BGBC)-type thin-film transistors (TFTs) present several advantages for the manufacture and application of organic TFTs, although serious difficulties are encountered when trying to achieve s…
View article: Control of Polar/Antipolar Layered Organic Semiconductors by the Odd‐Even Effect of Alkyl Chain
Control of Polar/Antipolar Layered Organic Semiconductors by the Odd‐Even Effect of Alkyl Chain Open
Some rodlike organic molecules exhibit exceptionally high layered crystallinity when composed of a link between π‐conjugated backbone (head) and alkyl chain (tail). These molecules are aligned side‐by‐side unidirectionally to form self‐org…
View article: A Double Bond Between Two Molecules
A Double Bond Between Two Molecules Open
π-Conjugated molecules with one electronic spin often form π-stacked dimers via molecular-orbital interactions between the two unpaired electrons. These interactions are recognized as intermolecular single bonds between two π-conjugated sy…
View article: CCDC 2220104: Experimental Crystal Structure Determination
CCDC 2220104: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Erratum: Computational findings of metastable ferroelectric phases of squaric acid [Phys. Rev. B 97, 184102 (2018)]
Erratum: Computational findings of metastable ferroelectric phases of squaric acid [Phys. Rev. B 97, 184102 (2018)] Open
Received 21 August 2023DOI:https://doi.org/10.1103/PhysRevB.108.059903©2023 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasAntiferroelectricityCrystal structureFerroelectricityPiezoelectricityPhysical SystemsFerroel…
View article: CCDC 2240318: Experimental Crystal Structure Determination
CCDC 2240318: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2240319: Experimental Crystal Structure Determination
CCDC 2240319: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2240320: Experimental Crystal Structure Determination
CCDC 2240320: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: A straightforward method using the sign of the piezoelectric coefficient to identify the ferroelectric switching mechanism
A straightforward method using the sign of the piezoelectric coefficient to identify the ferroelectric switching mechanism Open
Some organic ferroelectrics have two possible switching modes: molecular reorientation and proton transfer. Typical examples include 2,5-dihydroxybenzoic acid (DHBA) and Hdabco-ReO $$_4$$ (dabco = diazabicyclo[2.2.2]octane). The directi…
View article: Collective bending motion of a two-dimensionally correlated bowl-stacked columnar liquid crystalline assembly under a shear force
Collective bending motion of a two-dimensionally correlated bowl-stacked columnar liquid crystalline assembly under a shear force Open
Stacked teacups inspired the idea that columnar assemblies of stacked bowl-shaped molecules may exhibit a unique dynamic behavior, unlike usual assemblies of planar disc– and rod-shaped molecules. On the basis of the molecular design conce…
View article: Alkyl-Parity Controlled Switching of Polar/Antipolar Organic Semiconductors
Alkyl-Parity Controlled Switching of Polar/Antipolar Organic Semiconductors Open
The odd-even effects are renowned as a mysterious phenomenon in broad fields of science but have never been established as an effective approach for materials engineering. We demonstrate that the parity of alkyl carbon number n can cause a…
View article: CSD 1815858: Experimental Crystal Structure Determination
CSD 1815858: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 1815855: Experimental Crystal Structure Determination
CSD 1815855: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 1815857: Experimental Crystal Structure Determination
CSD 1815857: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 1815856: Experimental Crystal Structure Determination
CSD 1815856: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: Synthesis of conductive polymer alloys by electrochemical polymerization in chiral liquid crystal
Synthesis of conductive polymer alloys by electrochemical polymerization in chiral liquid crystal Open
Synthesis of conjugated polymer alloys with chirality was developed. Optically active polymer alloys were prepared by electrochemical polymerization in cholesteric liquid crystal. First, we prepared polymer alloys with 2,2′-bithiophene (BT…
View article: Conducting Polymer Metallic Emerald: Magnetic Measurements of Nanocarbons/Polyaniline and Preparation of Plastic Composites
Conducting Polymer Metallic Emerald: Magnetic Measurements of Nanocarbons/Polyaniline and Preparation of Plastic Composites Open
Synthesis of polyaniline in the presence of fullerene nanotubes (nanocarbons) in water was carried out with oxidative polymerization. The surface of the sample showed metallic emerald green color in bulk like the brilliance of encrusted ge…
View article: CCDC 2164775: Experimental Crystal Structure Determination
CCDC 2164775: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2164786: Experimental Crystal Structure Determination
CCDC 2164786: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2164780: Experimental Crystal Structure Determination
CCDC 2164780: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2164779: Experimental Crystal Structure Determination
CCDC 2164779: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2164781: Experimental Crystal Structure Determination
CCDC 2164781: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2164771: Experimental Crystal Structure Determination
CCDC 2164771: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2164787: Experimental Crystal Structure Determination
CCDC 2164787: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …