“Solid Solutions of Plastic/Ferroelectric Crystals: Toward Tailor-Made Functional Materials”
J. Harada, M. Takehisa, Y. Kawamura, H. Hasegawa, and T. Usui
J. Am. Chem. Soc., 146, 21176-21185 (2024).
2024
2023
“Intersecting multiaxial domain walls in plastic ferroelectric crystal films”
Y. Uemura, S. Matsuoka, S. Arai, J. Harada, and T. Hasegawa
Phys. Rev. Mater., 7, 035601 (2023).
“Ferroelectric Ionic Molecular Crystals with Significant Plasticity and a Low Melting Point: High Performance in Hot-Pressed Polycrystalline Plates and Melt-Grown Crystalline Sheets”
J. Harada, H. Takahashi, R. Notsuka, M. Takehisa, Y. Takahashi, T. Usui, and H. Taniguchi
Angew. Chem. Int. Ed., 62, e202215286 (2023).
2022
“Plastic/Ferroelectric Crystals with Distorted Molecular Arrangement: Ferroelectricity in Bulk Polycrystalline Films through Lattice Reorientation”
J. Harada, M. Takehisa, Y. Kawamura, H. Takahashi, and Y. Takahashi
Adv. Electron. Mater., 8, 2101415 (2022).
2021
“Stabilization of Interfacial Polarization and Induction of Polarization Hysteresis in Organic MISIM Devices”
S. Yokokura, A. Tomimatsu, J. Ishiguro, J. Harada, H. Takahashi, Y. Takahashi, Y. Nakamura, H. Kishida, R. Suizu, M. M. Matsushita, and K. Awaga
ACS Appl. Mater. Interfaces, 13, 31928–31933 (2021).
“Charge injection phenomena at the contact interface between 5,10,15,20-tetra(methyl)porphyrin cobalt and 2,5-difluoro-7,7,8,8-tetracyanoquinodimethane single crystals”
Y. Takahashi, K. Ishida, S. Matsuno, M. Kurokawa, T. Shimada, J. Harada, and T. Inabe
CrystEngComm, 23, 3975–3980 (2021).
“Plastic/ferroelectric molecular crystals: Ferroelectric performance in bulk polycrystalline forms”
J. Harada
APL Mater., 9, 020901 (2021).
2020
“Electric and Thermosalient Properties of a Charge-Transfer Complex Exhibiting a Minor Valence Instability Transition”
Y. Takahashi, T. Kondo, S. Yokokura, M. Takehisa, J. Harada, T. Inabe, M. M. Matsushita, and K. Awaga
Cryst. Growth Des., 20, 4758–4763 (2020).
“Molecular Dynamics Simulation Study of the Plastic/Ferroelectric Crystal Quinuclidinium Perrhenate”
M. Yoneya and J. Harada
J. Phys. Chem. C, 124, 2171–2177 (2020).
“Incorporating Spacer Molecules into the Tetrathiafulvalene-p-Chloranil Charge-Transfer Framework: Modulating the Neutral–Ionic Phase Transition”
Y. Takahashi, M. Takehisa, E. Tanaka, J. Harada, R. Kumai, and T. Inabe
J. Phys. Chem. Lett., 11, 1336–1342 (2020).
2019
“Plastic/Ferroelectric Crystals with Easily Switchable Polarization: Low-Voltage Operation, Unprecedentedly High Pyroelectric Performance, and Large Piezoelectric Effect in Polycrystalline Forms”
J. Harada, Y. Kawamura, Y. Takahashi, Y. Uemura, T. Hasegawa, H. Taniguchi, and K. Maruyama
J. Am. Chem. Soc., 141, 9349-9357 (2019).
“Crystals of Charge-Transfer Complexes with Reorienting Polar Molecules: Dielectric Properties and Order–Disorder Phase Transitions”
J. Harada, N. Yoneyama, S. Sato, Y. Takahashi, and T. Inabe
Cryst. Growth Des., 19, 291-299 (2019).
2018
“Electronic Properties of Tin Iodide Hybrid Perovskites: Effect of Indium Doping”
K. Kobayashi, H. Hasegawa, Y. Takahashi, J. Harada, and T. Inabe
Mater. Chem. Front., 2, 1291–1295 (2018).
“Band-Like Carrier Transport at the Single-Crystal Contact Interfaces Between 2,5-Difluoro-7,7,8,8-Tetracyanoquinodimethane and Electron Donors”
T. Shimada, Y. Takahashi, J. Harada, H. Hasegawa, and T. Inabe
J. Phys. Chem. Lett., 9, 420-424 (2018).
“Ferroelectricity and Piezoelectricity in Free-Standing Polycrystalline Films of Plastic Crystals”
J. Harada, N. Yoneyama, S. Yokokura, Y. Takahashi, A. Miura, N. Kitamura, and T. Inabe
J. Am. Chem. Soc., 140, 346-354 (2018).
2017
“Photochromism of Fulgide Crystals: From Lattice-Controlled Product Accumulation to Phase Separation”
J. Harada, M. Taira, and K. Ogawa
Cryst. Growth Des., 17, 2682–2687 (2017).
“Effective band gap tuning by foreign metal doping in hybrid tin iodide perovskites”
H. Hasegawa, K. Kobayashi, Y. Takahashi, J. Harada, and T. Inabe
J. Mater. Chem. C, 5, 4048–4052 (2017).
“Structural and transport properties of neutral radical crystals of CoIII(tmp)(CN)2 (tmp = 5,10,15,20-tetramethylporphyrinato) and the CN-bridged polymer [CoIII(tmp)(CN)]n”
M. Kurokawa, J. F. F. Jose-Larong, H. Hasegawa, Y. Takahashi, J. Harada, and T. Inabe
Dalton Trans., 46, 4422–4429 (2017).
2016
“Fabrication of Conducting Thin Films on the Surfaces of 7,7,8,8-Tetracyanoquinodimethane Single-Component and Charge-Transfer Complex Single Crystals: Nucleation, Crystal Growth, Morphology, and Charge Transport”
Y. Takahashi, T. Mikasa, K. Hayakawa, S. Yokokura, H. Hasegawa, J. Harada and T. Inabe
J. Phys. Chem. C, 120, 17537–17545 (2016).
“Directionally tunable and mechanically deformable ferroelectric crystals from rotating polar globular ionic molecules”
J. Harada, T. Shimojo, H. Oyamaguchi, H. Hasegawa, Y. Takahashi, K. Satomi, Y. Suzuki, J. Kawamata, and T. Inabe
Nature Chem., 8, 946–952 (2016).
“Charge Carrier Doping into the Peierls Insulator of the TCNQ Anion Radical Salt (TCNQ = 7,7,8,8-Tetracyanoquinodimethane)”
H. Kubota, Y. Takahashi, H. Hasegawa, T. Shimada, Jun Harada, and T. Inabe
J. Phys. Chem. C, 120, 11545–11551 (2016).
2015
“Switching of Transfer Characteristics of an Organic Field-Effect Transistor by Phase Transitions: Sensitive Response to Molecular Dynamics and Charge Fluctuation”
S. Yokokura, Y. Takahashi, H. Nonaka, H. Hasegawa, J. Harada, T. Inabe, R. Kumai, H. Okamoto, M. M. Matsushita, and K. Awaga
Chem. Mater., 27, 4441–4449 (2015).
“Molecular Motion, Dielectric Response, and Phase Transition of Charge-Transfer Crystals: Acquired Dynamic and Dielectric Properties of Polar Molecules in Crystals”
J. Harada, M. Ohtani, Y. Takahashi, and T. Inabe
J. Am. Chem. Soc., 137, 4477–4486 (2015).
“Highly ordered alignment of conducting nano-crystallites on organic semiconductor single crystal surfaces”
T. Mikasa, Y. Takahashi, K. Hayakawa, S. Yokokura, H. Hasegawa, J. Harada, and T. Inabe
Thin Solid Films, 579, 38–43 (2015).
2014
“Structural and Physical Properties of a Series of 7,7,8,8-Tetracyanoquinodimethane Salts with Dications Bearing Two Terminal Pyridinium Rings”
H. Kubota, Y. Takahashi, J. Harada, and T. Inabe
Cryst. Groth Des., 14, 5575–5584 (2014).
“One-dimensional phthalocyanine-based conductor with S = 3/2 isotropic magnetic centers”
Y. Takita, H. Hasegawa, Y. Takahashi, J. Harada, A. Kanda, N. Hanasaki, and T. Inabe
J. Porphyrins Phthalocyanines, 18, 814–823 (2014).
“What Molecules Are Likely or Unlikely To Undergo Pedal Motions in Crystals?”
J. Harada, and K. Ogawa
Cryst. Groth Des., 14, 5182–5188 (2014).
“Hole Doping of Tin Bromide and Lead Bromide Organic-Inorganic Hybrid Semiconductors”
G. S. Lorena, H. Hasegawa, Y. Takahashi, J. Harada, and T. Inabe
Chem. Lett., 43, 1535–1537 (2014).
“A tricky water molecule coordinated to a verdazyl radical–iron(II) complex: a multitechnique approach”
H. Kamebuchi, M. Okubo, A. Okazawa, M. Enomoto, J. Harada, K. Ogawa, G. Maruta, S. Takeda, N. Kojima, C. Train, and M. Verdaguerg
Phys. Chem. Chem. Phys., 16, 9086–9095 (2014).
“Charge Conduction Properties at the Contact Interface between (Phthalocyaninato)nickel(II) and Electron Acceptor Single Crystals”
Y. Takahashi, K. Hayakawa, K. Takayama, S. Yokokura, J. Harada, H. Hasegawa, and T. Inabe
Chem. Mater., 26, 993–998 (2014).
2013
“Alternating Ferro- and Antiferromagnetic Couplings in One-Dimensional Chain Hexachlorodicuprate(II), (MV)[CuCl3]2 (MV = Methyl Viologen)”
Y. Seki, A. Okazawa, M. Enomoto, J. Harada, K. Ogawa, and N. Kojima
Curr. Inorg. Chem., 3, 94–100 (2013).
“The bis(ethylenedithio)tetrathiafulvalene-based ionic charge-transfer complex with 2,3-dichloro-5,6-dicyano-p-benzoquinone”
Y. Nakagawa, Y. Takahashi, J. Harada, and T. Inabe
Acta Crystallogr., C69, 400–402 (2013).
Until 2012, selected
“Solid-State Photochromism of Chromenes: Enhanced Photocoloration and Observation of Unstable Colored Species at Low Temperatures”
J. Harada, K. Ueki, M. Anada, Y. Kawazoe, and K. Ogawa
Chem. Eur. J., 17, 14111–14119 (2011).
“Photochromism of spiropyrans and spirooxazines in the solid state: low temperature enhances photocoloration”
J. Harada, Y. Kawazoe, and K. Ogawa
Chem. Commun., 46, 2593–2595 (2010).
“Pedal motion in crystals”
J. Harada and K. Ogawa
Chem. Soc. Rev., 38, 2244–2252 (2009).
「有機結晶の色変化を理解する-サリチリデンアニリン類のサーモクロミズムの真相-」
原田 潤, 小川 桂一郎
現代化学, 2009年，1月号，25–30.
“X-ray Diffraction Analysis of Photochromic Reaction of Fulgides: Crystalline State Reaction Induced by Two-Photon Excitation”
J. Harada, R. Nakajima, and K. Ogawa
J. Am. Chem. Soc., 130, 7085–7091 (2008).
“Crucial Role of Fluorescence in the Solid-State Thermochromism of Salicylideneanilines”
J. Harada, T. Fujiwara, and K. Ogawa
J. Am. Chem. Soc., 129, 16216–16221 (2007).
“Solid-State Thermochromism Studied by Variable-Temperature Diffuse Reflectance Spectroscopy. A New Perspective on the Chromism of Salicylideneanilines”
T. Fujiwara, J. Harada, and K. Ogawa
J. Phys. Chem. B, 108, 4035–4038 (2004).
“X-ray Diffraction Analysis of Nonequilibrium States in Crystals: Observation of an Unstable Conformer in Flash-Cooled Crystals”
J. Harada and K. Ogawa
J. Am. Chem. Soc., 126, 3539–3544 (2004).
“Invisible but Common Motion in Organic Crystals: A Pedal Motion in Stilbenes and Azobenzenes”
J. Harada, and K. Ogawa
J. Am. Chem. Soc., 123, 10884–10888 (2001).
“X-ray Analysis of Structural Changes in Photochromic Salicylideneaniline Crystals. Solid-State Reaction Induced by Two-Photon Excitation”
J. Harada, H. Uekusa, and Y. Ohashi
J. Am. Chem. Soc., 121, 5809–5810 (1999).
“Crystal Structure Change for the Thermochromy of N-Salicylideneanilines. The First Observation by X-ray Diffraction”
K. Ogawa, Y. Kasahara, Y. Ohtani, and J. Harada
J. Am. Chem. Soc., 120, 7107–7108 (1998).
“Molecular Motion and Conformational Interconversion of Azobenzenes in Crystals as Studied by X-ray Diffraction”
J. Harada, K. Ogawa, and S. Tomoda
Acta Crystallogr., B53, 662–672 (1997).
“The Central Bond Length in 1,2-Diphenylethanes”
J. Harada, K. Ogawa, and S. Tomoda
J. Am. Chem. Soc., 117, 4476–4478 (1995).