1
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Fujino T, Kameyama R, Onozuka K, Matsuo K, Dekura S, Miyamoto T, Guo Z, Okamoto H, Nakamura T, Yoshimi K, Kitou S, Arima TH, Sato H, Yamamoto K, Takahashi A, Sawa H, Nakamura Y, Mori H. Orbital hybridization of donor and acceptor to enhance the conductivity of mixed-stack complexes. Nat Commun 2024; 15:3028. [PMID: 38627402 PMCID: PMC11021477 DOI: 10.1038/s41467-024-47298-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 03/22/2024] [Indexed: 04/19/2024] Open
Abstract
Mixed-stack complexes which comprise columns of alternating donors and acceptors are organic conductors with typically poor electrical conductivity because they are either in a neutral or highly ionic state. This indicates that conductive carriers are insufficient or are mainly localized. In this study, mixed-stack complexes that uniquely exist at the neutral-ionic boundary were synthesized by combining donors (bis(3,4-ethylenedichalcogenothiophene)) and acceptors (fluorinated tetracyanoquinodimethanes) with similar energy levels and orbital symmetry between the highest occupied molecular orbital of the donor and the lowest unoccupied molecular orbital of the acceptor. Surprisingly, the orbitals were highly hybridized in the single-crystal complexes, enhancing the room-temperature conductivity (10-4-0.1 S cm-1) of mixed-stack complexes. Specifically, the maximum conductivity was the highest reported for single-crystal mixed-stack complexes under ambient pressures. The unique electronic structures at the neutral-ionic boundary exhibited structural perturbations between their electron-itinerant and localized states, causing abrupt temperature-dependent changes in their electrical, optical, dielectric, and magnetic properties.
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Affiliation(s)
- Tomoko Fujino
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan.
| | - Ryohei Kameyama
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan
| | - Kota Onozuka
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan
| | - Kazuki Matsuo
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan
| | - Shun Dekura
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan
| | - Tatsuya Miyamoto
- Department of Advanced Materials Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan
| | - Zijing Guo
- Department of Advanced Materials Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan
| | - Hiroshi Okamoto
- Department of Advanced Materials Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan
| | - Toshikazu Nakamura
- Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki, Aichi, 444-8585, Japan
| | - Kazuyoshi Yoshimi
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan
| | - Shunsuke Kitou
- Department of Advanced Materials Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan
| | - Taka-Hisa Arima
- Department of Advanced Materials Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan
| | - Hiroyasu Sato
- Rigaku Corporation, 3-9-12 Matsubara, Akishima, Tokyo, 196-8666, Japan
| | - Kaoru Yamamoto
- Department of Physics, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama, 700-0005, Japan
| | - Akira Takahashi
- Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi, 466-8555, Japan
| | - Hiroshi Sawa
- Department of Applied Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Yuiga Nakamura
- Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Hatsumi Mori
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan.
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2
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Barman S, Pal A, Mukherjee A, Paul S, Datta A, Ghosh S. Supramolecular Organic Ferroelectric Materials from Donor-Acceptor Systems. Chemistry 2024; 30:e202303120. [PMID: 37941296 DOI: 10.1002/chem.202303120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/04/2023] [Accepted: 11/06/2023] [Indexed: 11/10/2023]
Abstract
Organic ferroelectric (FE) materials, though known for more than a century, are yet to reach close to the benchmark of inorganic or hybrid materials in terms of the magnitude of polarization. Amongst the different classes of organic systems, donor (D)-acceptor (A) charge-transfer (CT) complexes are recognized as promising for ferroelectricity owing to their neutral-to-ionic phase transition at low temperature. This review presents an overview of different supramolecular D-A systems that have been explored for FE phase transitions. The discussion begins with a general introduction of ferroelectricity and its different associated parameters. Then it moves on to show early examples of CT cocrystals that have shown FE properties at sub-ambient temperature. Subsequently, recent developments in the field of room temperature (RT) ferroelectricity, exhibited by H-bond-stabilized lock-arm supramolecular-ordering (LASO) in D-A co-crystals or other FE CT-crystals devoid of neutral-ionic phase transition are discussed. Then the discussion moves on to emerging reports on other D-A soft materials such as gel and foldable polymers; finally it shows very recent developments in ferroelectricity in supramolecular assemblies of single-component dipolar or ambipolar π-systems, exhibiting intra-molecular charge transfer. The effects of structural nuances such as H-bonding, balanced charge transfer and chirality on the observed ferroelectricity is described with the available examples. Finally, piezoelectricity in recently reported ambipolar ADA-type systems are discussed to highlight the future potential of these soft materials in micropower energy harvesting.
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Affiliation(s)
- Shubhankar Barman
- School of Applied and Interdisciplinary Sciences, Indian Association for Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, 700032, Kolkata, India
| | - Aritri Pal
- School of Applied and Interdisciplinary Sciences, Indian Association for Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, 700032, Kolkata, India
| | - Anurag Mukherjee
- School of Applied and Interdisciplinary Sciences, Indian Association for Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, 700032, Kolkata, India
| | - Swadesh Paul
- School of Applied and Interdisciplinary Sciences, Indian Association for Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, 700032, Kolkata, India
| | - Anuja Datta
- School of Applied and Interdisciplinary Sciences, Indian Association for Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, 700032, Kolkata, India
- Technical Research Center, Indian Association for Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, 700032, Kolkata, India
| | - Suhrit Ghosh
- School of Applied and Interdisciplinary Sciences, Indian Association for Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, 700032, Kolkata, India
- Technical Research Center, Indian Association for Cultivation of Science, 2 A and 2B Raja S. C. Mullick Road, 700032, Kolkata, India
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3
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Sekine Y, Nishio M, Shimada T, Kosaka W, Miyasaka H. Ionicity Diagrams for Electron-Donor and -Acceptor Metal–Organic Frameworks: DA Chains and D2A Layers Obtained from Paddlewheel-Type Diruthenium(II,II) Complexes and Polycyano-Organic Acceptors. Inorg Chem 2021; 60:3046-3056. [DOI: 10.1021/acs.inorgchem.0c03335] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yoshihiro Sekine
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira,
Aoba-ku, Sendai 980-8577, Japan
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - Masaki Nishio
- Department of Chemistry, Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Tomoka Shimada
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - Wataru Kosaka
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira,
Aoba-ku, Sendai 980-8577, Japan
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - Hitoshi Miyasaka
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira,
Aoba-ku, Sendai 980-8577, Japan
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
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4
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Sekine Y, Chen J, Eguchi N, Miyasaka H. Fine tuning of intra-lattice electron transfers through site doping in tetraoxolene-bridged iron honeycomb layers. Chem Commun (Camb) 2020; 56:10867-10870. [PMID: 32940287 DOI: 10.1039/d0cc03808c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The precise control of intra-lattice multiple electron transfers was demonstrated in the solvated and desolvated species of the tetraoxolene-bridged Fe honeycomb layer system, (NPr4)2[Fe2(Cl2An)3]·(solv) (Cl2Ann- = 2,5-dichloro-3,6-dihydroxy-1,4-benzoquinonate; NPr4+ = tetrapropylammonium cation), by the site-doping of the Cl2Ann- bridging unit using X2Ann- units with X = Br or F.
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Affiliation(s)
- Yoshihiro Sekine
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan. and Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - Jian Chen
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.
| | - Naoki Eguchi
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - Hitoshi Miyasaka
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan. and Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
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5
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Chen J, Sekine Y, Okazawa A, Sato H, Kosaka W, Miyasaka H. Chameleonic layered metal-organic frameworks with variable charge-ordered states triggered by temperature and guest molecules. Chem Sci 2020; 11:3610-3618. [PMID: 34094049 PMCID: PMC8152584 DOI: 10.1039/d0sc00684j] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 03/04/2020] [Indexed: 01/05/2023] Open
Abstract
Molecular materials whose electronic states are multiply varied depending on external stimuli are among the most promising targets for the development of multiply accessible molecular switches. Here, we report a honeycomb layer composed of tetraoxolene-bridged iron (Fe) subunits whose charge-ordered states are multiply variable via thermal treatments and solvation/desolvation with the crystallinity intact. The compound is (NPr4)2[Fe2(Cl2An)3] (1-d; NPr4 + = tetra-n-propylammonium; Cl2An2- = 2,5-dichloro-3,6-dihydroxo-1,4-benzoquinonate), which possesses three charge-ordered states: a low-temperature (LT) phase [(Fe3+)2(Cl2An2-)(Cl2An˙3-)2]2-; an intermediate (IM) phase [(Fe2.5+)2(Cl2An2-)(Cl2An2.5-)2]2-; and a high-temperature (HT) phase [(Fe2+)2(Cl2An2-)3]2- that varies according to temperature. In addition, the LT phase of 1-d is reversibly changeable to another IM phase in its solvated compound 1 via a solvation/desolvation process at room temperature. This example demonstrates a new multiple-switching system based on electron transfer and host-guest chemistry in a charge-flexible metal-organic framework.
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Affiliation(s)
- Jian Chen
- Institute for Materials Research, Tohoku University 2-1-1 Katahira, Aoba-ku Sendai 980-8577 Japan
- Department of Chemistry, Graduate School of Science, Tohoku University 6-3 Aramaki-Aza-Aoba, Aoba-ku Sendai 980-8578 Japan
| | - Yoshihiro Sekine
- Institute for Materials Research, Tohoku University 2-1-1 Katahira, Aoba-ku Sendai 980-8577 Japan
- Department of Chemistry, Graduate School of Science, Tohoku University 6-3 Aramaki-Aza-Aoba, Aoba-ku Sendai 980-8578 Japan
| | - Atsushi Okazawa
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo 3-8-1 Komaba Meguro-ku Tokyo 153-8902 Japan
| | - Hiroyasu Sato
- Application Laboratory, Rigaku Corporation 3-9-12, Matsubara-cho Akishima-shi Tokyo 196-8666 Japan
| | - Wataru Kosaka
- Institute for Materials Research, Tohoku University 2-1-1 Katahira, Aoba-ku Sendai 980-8577 Japan
- Department of Chemistry, Graduate School of Science, Tohoku University 6-3 Aramaki-Aza-Aoba, Aoba-ku Sendai 980-8578 Japan
| | - Hitoshi Miyasaka
- Institute for Materials Research, Tohoku University 2-1-1 Katahira, Aoba-ku Sendai 980-8577 Japan
- Department of Chemistry, Graduate School of Science, Tohoku University 6-3 Aramaki-Aza-Aoba, Aoba-ku Sendai 980-8578 Japan
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Chen RX, Aquino AJA, Sue ACH, Niehaus T, Lischka H. Characterization of Charge Transfer in Excited States of Extended Clusters of π-Stacked Donor and Acceptor Complexes in Lock-Arm Supramolecular Ordering. J Phys Chem A 2019; 123:4532-4542. [DOI: 10.1021/acs.jpca.9b02208] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rui-xue Chen
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Adélia J. A. Aquino
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Andrew C.-H. Sue
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Thomas Niehaus
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, 69622, Villeurbanne, France
| | - Hans Lischka
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
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7
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Sekine Y, Shimada T, Miyasaka H. Ionic Donor-Acceptor Chain Derived from an Electron-Transfer Reaction of a Paddlewheel-Type Diruthenium(II, II) Complex and N,N'-Dicyanoquinonediimine. Chemistry 2018; 24:13093-13097. [PMID: 30094879 DOI: 10.1002/chem.201802630] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 06/26/2018] [Indexed: 11/06/2022]
Abstract
A new ionic donor-acceptor (D+ A- ) chain compound, [{Ru2 (2,6-(CF3 )2 PhCO2 )2 (p-PhPhCO2 )2 }DMDCNQI] (1; 2,6-(CF3 )2 PhCO2- =2,6-bis(trifluoromethyl)benzoate; p-PhPhCO2- =4-biphenylcarboxylate; DMDCNQI=2,5-dimethyl-N,N'-dicyanoquinonediimine) was isolated and structurally characterized. It represents the first of this type of ionic chain compounds.
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Affiliation(s)
- Yoshihiro Sekine
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.,Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan
| | - Tomoka Shimada
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan
| | - Hitoshi Miyasaka
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.,Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan
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8
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Chen J, Sekine Y, Komatsumaru Y, Hayami S, Miyasaka H. Thermally Induced Valence Tautomeric Transition in a Two-Dimensional Fe-Tetraoxolene Honeycomb Network. Angew Chem Int Ed Engl 2018; 57:12043-12047. [PMID: 30047197 DOI: 10.1002/anie.201807556] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Indexed: 11/11/2022]
Abstract
A novel tetraoxolene-bridged Fe two-dimensional honeycomb layered compound, (NPr4 )2 [Fe2 (Cl2 An)3 ] ⋅2 (acetone)⋅H2 O (1), where Cl2 Ann- =2,5-dichloro-3,6-dihydroxy-1,4-benzoquinonate and NPr4+ =tetrapropylammonium cation, has been synthesized. 1 revealed a thermally induced valence tautomeric transition at T1/2 =236 K (cooling)/237 K (heating) between Fem+ (m=2 or 3) and Cl2 Ann- (n=2 or 3) that induced valence modulations between [FeIIHS FeIIIHS (Cl2 An2- )2 (Cl2 An.3- )]2- at T>T1/2 and [FeIIIHS FeIIIHS (Cl2 An2- )(Cl2 An.3- )2 ]2- at T<T1/2 . Even in a two-dimensional network structure, the low-temperature phase [FeIIIHS FeIIIHS (Cl2 An2- )(Cl2 An.3- )2 ]2- valence set can be regarded as a magnetic chain-knit network, where ferrimagnetic Δ and Λ chains of [FeIIIHS (Cl2 An.3- )]∞ are alternately linked by the diamagnetic Cl2 An2- . This results in a slow magnetization behavior attributed to the structure acting as a single-chain magnet at lower temperatures.
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Affiliation(s)
- Jian Chen
- Institute for Materials Research (IMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.,Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan
| | - Yoshihiro Sekine
- Institute for Materials Research (IMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.,Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan
| | - Yuki Komatsumaru
- Department of Chemistry, Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Shinya Hayami
- Department of Chemistry, Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan.,Institute of Pulsed Power Science (IPPS), Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Hitoshi Miyasaka
- Institute for Materials Research (IMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.,Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan
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9
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Chen J, Sekine Y, Komatsumaru Y, Hayami S, Miyasaka H. Thermally Induced Valence Tautomeric Transition in a Two-Dimensional Fe-Tetraoxolene Honeycomb Network. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807556] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Jian Chen
- Institute for Materials Research (IMR); Tohoku University; 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan
- Department of Chemistry; Graduate School of Science; Tohoku University; 6-3 Aramaki-Aza-Aoba Aoba-ku Sendai 980-8578 Japan
| | - Yoshihiro Sekine
- Institute for Materials Research (IMR); Tohoku University; 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan
- Department of Chemistry; Graduate School of Science; Tohoku University; 6-3 Aramaki-Aza-Aoba Aoba-ku Sendai 980-8578 Japan
| | - Yuki Komatsumaru
- Department of Chemistry; Faculty of Advanced Science and Technology; Kumamoto University; 2-39-1 Kurokami Chuo-ku Kumamoto 860-8555 Japan
| | - Shinya Hayami
- Department of Chemistry; Faculty of Advanced Science and Technology; Kumamoto University; 2-39-1 Kurokami Chuo-ku Kumamoto 860-8555 Japan
- Institute of Pulsed Power Science (IPPS); Kumamoto University; 2-39-1 Kurokami Chuo-ku Kumamoto 860-8555 Japan
| | - Hitoshi Miyasaka
- Institute for Materials Research (IMR); Tohoku University; 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan
- Department of Chemistry; Graduate School of Science; Tohoku University; 6-3 Aramaki-Aza-Aoba Aoba-ku Sendai 980-8578 Japan
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10
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Dynamic molecular crystals with switchable physical properties. Nat Chem 2018; 8:644-56. [PMID: 27325090 DOI: 10.1038/nchem.2547] [Citation(s) in RCA: 509] [Impact Index Per Article: 84.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 05/09/2016] [Indexed: 02/07/2023]
Abstract
The development of molecular materials whose physical properties can be controlled by external stimuli - such as light, electric field, temperature, and pressure - has recently attracted much attention owing to their potential applications in molecular devices. There are a number of ways to alter the physical properties of crystalline materials. These include the modulation of the spin and redox states of the crystal's components, or the incorporation within the crystalline lattice of tunable molecules that exhibit stimuli-induced changes in their molecular structure. A switching behaviour can also be induced by changing the molecular orientation of the crystal's components, even in cases where the overall molecular structure is not affected. Controlling intermolecular interactions within a molecular material is also an effective tool to modulate its physical properties. This Review discusses recent advances in the development of such stimuli-responsive, switchable crystalline compounds - referred to here as dynamic molecular crystals - and suggests how different approaches can serve to prepare functional materials.
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11
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Wiscons RA, Goud NR, Damron JT, Matzger AJ. Room-Temperature Ferroelectricity in an Organic Cocrystal. Angew Chem Int Ed Engl 2018; 57:9044-9047. [PMID: 29786921 DOI: 10.1002/anie.201805071] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Indexed: 11/10/2022]
Abstract
Ferroelectric materials exhibit switchable remanent polarization due to reversible symmetry breaking under an applied electric field. Previous research has leveraged temperature-induced neutral-ionic transitions in charge-transfer (CT) cocrystals to access ferroelectrics that operate through displacement of molecules under an applied field. However, displacive ferroelectric behavior is rare in organic CT cocrystals and achieving a Curie temperature (TC ) above ambient has been elusive. Here a cocrystal between acenaphthene and 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane is presented that shows switchable remanent polarization at room temperature (TC =68 °C). Raman spectroscopy, X-ray diffraction, and solid-state NMR spectroscopy indicate the ferroelectric behavior is facilitated by acenaphthene (AN) rotation, deviating from conventional design strategies for CT ferroelectrics. These findings highlight the relevance of non-CT interactions in the design of displacive ferroelectric cocrystals.
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Affiliation(s)
- Ren A Wiscons
- Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, 930 North University Avenue, Ann Arbor, MI, 48109-1055, USA
| | - N Rajesh Goud
- Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, 930 North University Avenue, Ann Arbor, MI, 48109-1055, USA
| | - Joshua T Damron
- Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, 930 North University Avenue, Ann Arbor, MI, 48109-1055, USA
| | - Adam J Matzger
- Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, 930 North University Avenue, Ann Arbor, MI, 48109-1055, USA
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12
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Wiscons RA, Goud NR, Damron JT, Matzger AJ. Room‐Temperature Ferroelectricity in an Organic Cocrystal. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805071] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ren A. Wiscons
- Department of Chemistry and the Macromolecular Science and Engineering Program University of Michigan 930 North University Avenue Ann Arbor MI 48109-1055 USA
| | - N. Rajesh Goud
- Department of Chemistry and the Macromolecular Science and Engineering Program University of Michigan 930 North University Avenue Ann Arbor MI 48109-1055 USA
| | - Joshua T. Damron
- Department of Chemistry and the Macromolecular Science and Engineering Program University of Michigan 930 North University Avenue Ann Arbor MI 48109-1055 USA
| | - Adam J. Matzger
- Department of Chemistry and the Macromolecular Science and Engineering Program University of Michigan 930 North University Avenue Ann Arbor MI 48109-1055 USA
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13
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Zhu X, Zhang WY, Chen C, Ye Q, Fu DW. Challenge in optoelectronic duplex switches: a red emission large-size single crystal and a unidirectional flexible thin film of a hybrid multifunctional material. Dalton Trans 2018; 47:2344-2351. [PMID: 29372192 DOI: 10.1039/c7dt04489e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoelectric dual-function features in bulk crystals or flexible thin films make them excellent candidates for important and thriving applications in storage, sensing and other information fields. Based on superior advantages such as easy and environmentally friendly processing, mechanical flexibility, and ability to fabricate films and bulk single crystals; we designed a type of molecular material with a photoelectric multi-function switch, [N(NH2CH2CH2)3]2Mn2Cl12 (compound 1), which exhibits intriguing temperature-dependent dielectric and red emission switchable characteristics. This material perfectly explains the advantages of molecular materials, while 1 can also be used to fabricate a transparent unidirectional film with ultra-flexibility. Moreover, this material shows the highest record in signal contrast of ∼5 (exceeding all the known molecular materials/crystalline switches, revealing its potential to obtain high-efficiency signal-to-noise ratio), sensitive dielectric bi-stability, and excellent switching anti fatigue. These features give it a high application value in integrated circuits, optoelectronic seamless integration devices and flexible multifunctional devices.
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Affiliation(s)
- Xiao Zhu
- Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing, 211189, P.R. China.
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14
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Yamashita S, Nakazawa Y, Yamanaka S, Okumura M, Kojima T, Yoshinari N, Konno T. Dielectric Jump and Negative Electrostriction in Metallosupramolecular Ionic Crystals. Sci Rep 2018; 8:2606. [PMID: 29422649 PMCID: PMC5805720 DOI: 10.1038/s41598-018-20750-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Accepted: 01/22/2018] [Indexed: 11/25/2022] Open
Abstract
In natural ionic solids, cationic and anionic species are alternately arranged to minimize electrostatic energy. Aggregation of identical ionic species is commonly prohibited due to the repulsive, long-range nature of Coulombic interactions. Recently, we synthesized unique ionic solids, [AuI4CoIII2(dppe)2(d-pen)4]X2·nH2O (dppe = 1,2-bis(diphenylphosphino)ethane, d-pen = d-penicillaminate), in which complex cations are self-assembled into a cationic supramolecular octahedron, while monovalent or divalent inorganic anions are aggregated into an anomalous anionic cluster accommodating several water molecules. This quite unusual aggregation manner originates from various molecular-level non-Coulombic interactions such as hydrogen bonds and CH-π interactions; thus, this class of ionic solids is referred to as non-Coulombic ionic solids, abbreviated as NCISs. Herein, we report that the NCISs with a peculiar charge-separated (CS) structure in a cubic lattice show a negative, isotropic electrostriction phenomenon that has never been found in any ionic solids, as well as an anomalously large relaxer-like dielectric jump phenomenon reaching to an application level of ε′/ε0 ~ 105. The appearance of these phenomena was explained by the cooperative dynamics of inorganic anions and dipolar water molecules in the pliable anionic clusters that are surrounded by a rather robust cationic metallosupramolecular framework with a meso-scopic scale.
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Affiliation(s)
- Satoshi Yamashita
- Department of Chemistry, Graduate School of Science, Osaka University, Machinakeyama 1-1, Toyonaka, Osaka, 560-0043, Japan
| | - Yasuhiro Nakazawa
- Department of Chemistry, Graduate School of Science, Osaka University, Machinakeyama 1-1, Toyonaka, Osaka, 560-0043, Japan.
| | - Shusuke Yamanaka
- Department of Chemistry, Graduate School of Science, Osaka University, Machinakeyama 1-1, Toyonaka, Osaka, 560-0043, Japan
| | - Mitsutaka Okumura
- Department of Chemistry, Graduate School of Science, Osaka University, Machinakeyama 1-1, Toyonaka, Osaka, 560-0043, Japan
| | - Tatsuhiro Kojima
- Department of Chemistry, Graduate School of Science, Osaka University, Machinakeyama 1-1, Toyonaka, Osaka, 560-0043, Japan
| | - Nobuto Yoshinari
- Department of Chemistry, Graduate School of Science, Osaka University, Machinakeyama 1-1, Toyonaka, Osaka, 560-0043, Japan
| | - Takumi Konno
- Department of Chemistry, Graduate School of Science, Osaka University, Machinakeyama 1-1, Toyonaka, Osaka, 560-0043, Japan.
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15
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Phenomenology of the Neutral-Ionic Valence Instability in Mixed Stack Charge-Transfer Crystals. CRYSTALS 2017. [DOI: 10.3390/cryst7040108] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Yoshida Y, Nakamura Y, Kishida H, Hayama H, Nakano Y, Yamochi H, Saito G. Racemic charge-transfer complexes of a helical polycyclic aromatic hydrocarbon molecule. CrystEngComm 2017. [DOI: 10.1039/c7ce00763a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Nakabayashi K, Nishio M, Miyasaka H. Tuning of Stepwise Neutral-Ionic Transitions by Acceptor Site Doping in Alternating Donor/Acceptor Chains. Inorg Chem 2016; 55:2473-80. [PMID: 26878151 DOI: 10.1021/acs.inorgchem.5b02858] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The stepwise neutral-ionic (N-I) phase transition found in the alternating donor/acceptor (DA) chain [Ru2(2,3,5,6-F4PhCO2)4(DMDCNQI)]·2(p-xylene) (0; 2,3,5,6-F4PhCO2(-) = 2,3,5,6-tetrafluorobenzoate; DMDCNQI = 2,5-dimethyl-N,N'-dicyanoquinonediimine) was tuned by partly substituting the acceptor DMDCNQI with 2,5-dimethoxy-N,N'-dicyanoquinonediimine (DMeODCNQI), which displays a poorer electron affinity in an isostructural series. The site-doped series comprised [Ru2(2,3,5,6-F4PhCO2)4(DMDCNQI)1-x(DMeODCNQI)x]·2(p-xylene) for doping rates (x) = 0.05 (0.05-MeO), 0.10 (0.10-MeO), 0.15 (0.15-MeO), and 0.20 (0.20-MeO). The neutral chain [Ru2(2,3,5,6-F4PhCO2)4(DMeODCNQI)]·4(p-xylene) (1), which only contained DMeODCNQI, was also characterized. All site-doped compounds were isostructural to 0 except 1 despite their identical DA chain motif. Except at an x value of 0.20, they displayed a two-step N-I transition involving an intermediate phase. This transition occurred at high temperatures in 0 but shifted to lower temperatures in a parallel manner with increasing doping rate. Simultaneously, each transition broadened with increasing doping rate, leading to a convergence of two transitions at an x value approximating 0.2. Donor/acceptor-site-doping techniques present somewhat different impacts in terms of interchain Coulomb effects.
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Affiliation(s)
- Keita Nakabayashi
- Department of Chemistry, Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University , Kakuma-machi, Kanazawa 920-1192, Japan
| | - Masaki Nishio
- Department of Chemistry, Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University , Kakuma-machi, Kanazawa 920-1192, Japan
| | - Hitoshi Miyasaka
- Institute for Materials Research, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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Kosaka W, Itoh M, Miyasaka H. The effect of chlorine and fluorine substitutions on tuning the ionization potential of benzoate-bridged paddlewheel diruthenium(ii, ii) complexes. Dalton Trans 2015; 44:8156-68. [PMID: 25847192 DOI: 10.1039/c5dt00505a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of paddlewheel diruthenium(ii, ii) complexes with various chlorine-substituted benzoate ligands (Cl-series) was synthesized as tetrahydrofuran (THF) adducts [Ru2(ClxPhCO2)4(THF)2]; where ClxPhCO2(-) = o-chlorobenzoate, ; m-chlorobenzoate, ; p-chlorobenzoate, ; 2,3-dichlorobenzoate, ; 2,4-dichlorobenzoate, ; 2,5-dichlorobenzoate, ; 2,6-dichlorobenzoate, ; 3,4-dichlorobenzoate, ; 3,5-dichlorobenzoate, ; 2,3,4-trichlorobenzoate, ; 2,3,5-trichlorobenzoate, ; 2,4,5-trichlorobenzoate, ; 3,4,5-trichlorobenzoate, ; 2,3,4,5-tetrachlorobenzoate, . This Cl-series and the previously synthesized F-series together with four new fluorine-substituted derivatives, [Ru2(FxPhCO2)4(THF)2] (where FxPhCO2(-) = 2,3-difluorobenzoate, ; 2,4-difluorobenzoate, ; 2,5-difluorobenzoate, ; 2,3,5-trifluorobenzoate, ), were experimentally characterized with respect to solid-state structure, magnetic properties and electrochemistry. By tuning the substituents of the benzoate ligands using chlorine or fluorine atoms, the redox potential (E1/2) for [Ru2(II,II)]/[Ru2(II,III)](+) varied over a wide range of potentials from -40 mV to 360 mV (vs. Ag/Ag(+) in THF). This was dependent on (i) the number of ortho-substituents, i.e. non-, mono- and di-o-substituted groups, with quasi-Hammett parameters for ortho-Cl and -F substitutions (σo = -0.272 and -0.217, respectively) and (ii) the general Hammett constants, σm and σp, for each group. The HOMO energy level calculated on the basis of the atomic coordinates of the solid-state structure was strongly affected by Cl- and F-substitutions as well as the redox potential in solution, which emphasizes the steric contribution of ortho-substituents in the energy level giving a deviation of EHOMO < 0.3 eV and <0.55 eV for the Cl- and F-series, respectively.
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Affiliation(s)
- Wataru Kosaka
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.
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Wang BQ, Yan HB, Huang ZQ, Zhang YH, Sun J. Reversible phase transition of 2-carboxypyridinium perchlorate-pyridinium-2-carboxylate (1/1). Acta Crystallogr C 2015; 71:247-51. [PMID: 25836279 DOI: 10.1107/s2053229615003691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Accepted: 02/22/2015] [Indexed: 11/10/2022] Open
Abstract
The title salt, C6H6NO2(+)·ClO4(-)·C6H5NO2, was crystallized from an aqueous solution of equimolar quantities of perchloric acid and pyridine-2-carboxylic acid. Differential scanning calorimetry (DSC) measurements show that the compound undergoes a reversible phase transition at about 261.7 K, with a wide heat hysteresis of 21.9 K. The lower-temperature polymorph (denoted LT; T = 223 K) crystallizes in the space group C2/c, while the higher-temperature polymorph (denoted RT; T = 296 K) crystallizes in the space group P2/c. The relationship between these two phases can be described as: 2a(RT) = a(LT); 2b(RT) = b(LT); c(RT) = c(LT). The crystal structure contains an infinite zigzag hydrogen-bonded chain network of 2-carboxypyridinium cations. The most distinct difference between the higher (RT) and lower (LT) temperature phases is the change in dihedral angle between the planes of the carboxylic acid group and the pyridinium ring, which leads to the formation of different ten-membered hydrogen-bonded rings. In the RT phase, both the perchlorate anions and the hydrogen-bonded H atom within the carboxylic acid group are disordered. The disordered H atom is located on a twofold rotation axis. In the LT phase, the asymmetric unit is composed of two 2-carboxypyridinium cations, half an ordered perchlorate anion with ideal tetrahedral geometry and a disordered perchlorate anion. The phase transition is attributable to the order-disorder transition of half of the perchlorate anions.
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Affiliation(s)
- Bi-Qin Wang
- School of Chemistry and Chemical Engineering, Faculty of Light Industry, Hubei University of Technology, Wuhan, Hubei 430068, People's Republic of China
| | - Hai-Biao Yan
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan, Hubei 430068, People's Republic of China
| | - Zheng-Qing Huang
- School of Chemistry and Chemical Engineering, Faculty of Light Industry, Hubei University of Technology, Wuhan, Hubei 430068, People's Republic of China
| | - Yun-Hua Zhang
- Synergistic Innovation Center of Catalysis Materials of Hubei Province, Wuhan, Hubei 430068, People's Republic of China
| | - Jing Sun
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan, Hubei 430068, People's Republic of China
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20
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Kosaka W, Morita T, Yokoyama T, Zhang J, Miyasaka H. Fully Electron-Transferred Donor/Acceptor Layered Frameworks with TCNQ2–. Inorg Chem 2015; 54:1518-27. [DOI: 10.1021/ic502513p] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Wataru Kosaka
- Institute
for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
- Department
of Chemistry, Graduate School of Science, Tohoku University, 6-3
Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - Takaumi Morita
- Department
of Chemistry, Graduate School of Science, Tohoku University, 6-3
Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - Taiga Yokoyama
- Department
of Chemistry, Graduate School of Science, Tohoku University, 6-3
Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - Jun Zhang
- Department
of Chemistry, Graduate School of Science, Tohoku University, 6-3
Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - Hitoshi Miyasaka
- Institute
for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
- Department
of Chemistry, Graduate School of Science, Tohoku University, 6-3
Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
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21
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Chen C, Wang FF, Zhang Y, Ye Q, Ye HY, Fu DW. A high-temperature supramolecular-based switchable dielectric material with electrical bistability between high and low dielectric states. CrystEngComm 2015. [DOI: 10.1039/c4ce02028f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One new hybrid supramolecular-based phase transition compound TAPC containing macrocycle stator with electrical bistability between high and low dielectric states has been prepared.
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Affiliation(s)
- Cheng Chen
- Ordered Matter Science Research Center
- College of Chemistry and Chemical Engineering
- Southeast University
- Nanjing, PR China
| | - Fang-Fang Wang
- Ordered Matter Science Research Center
- College of Chemistry and Chemical Engineering
- Southeast University
- Nanjing, PR China
| | - Yi Zhang
- Ordered Matter Science Research Center
- College of Chemistry and Chemical Engineering
- Southeast University
- Nanjing, PR China
| | - Qiong Ye
- Ordered Matter Science Research Center
- College of Chemistry and Chemical Engineering
- Southeast University
- Nanjing, PR China
| | - Heng-Yun Ye
- Ordered Matter Science Research Center
- College of Chemistry and Chemical Engineering
- Southeast University
- Nanjing, PR China
| | - Da-Wei Fu
- Ordered Matter Science Research Center
- College of Chemistry and Chemical Engineering
- Southeast University
- Nanjing, PR China
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22
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Rudloff M, Ackermann K, Huth M, Jeschke HO, Tomic M, Valentí R, Wolfram B, Bröring M, Bolte M, Chercka D, Baumgarten M, Müllen K. Charge transfer tuning by chemical substitution and uniaxial pressure in the organic complex tetramethoxypyrene–tetracyanoquinodimethane. Phys Chem Chem Phys 2015; 17:4118-26. [DOI: 10.1039/c4cp04461d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Charge transfer is not enhanced by the larger electron affinity of the acceptor as evident from a comparison of the mixed-stack systems TMP–TCNQ and TMP–F4TCNQ.
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Affiliation(s)
- Milan Rudloff
- Goethe-Universität
- Physikalisches Institut
- Frankfurt am Main
- Germany
| | - Kai Ackermann
- Goethe-Universität
- Physikalisches Institut
- Frankfurt am Main
- Germany
| | - Michael Huth
- Goethe-Universität
- Physikalisches Institut
- Frankfurt am Main
- Germany
| | - Harald O. Jeschke
- Goethe-Universität
- Institut für Theoretische Physik
- Frankfurt am Main
- Germany
| | - Milan Tomic
- Goethe-Universität
- Institut für Theoretische Physik
- Frankfurt am Main
- Germany
| | - Roser Valentí
- Goethe-Universität
- Institut für Theoretische Physik
- Frankfurt am Main
- Germany
| | - Benedikt Wolfram
- Technische Universität Carolo Wilhelmina
- Institut für Anorganische und Analytische Chemie
- Braunschweig
- Germany
| | - Martin Bröring
- Technische Universität Carolo Wilhelmina
- Institut für Anorganische und Analytische Chemie
- Braunschweig
- Germany
| | - Michael Bolte
- Goethe-Universität
- Institut für Anorganische und Analytische Chemie
- Frankfurt am Main
- Germany
| | | | | | - Klaus Müllen
- Max-Planck-Institut für Polymerforschung
- Mainz
- Germany
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23
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Jin J, Jin L, Su EB. Temperature-induced isosymmetric reversible structural phase transition in catena-[pyridinium tris(μ2-bromo)-cadmium(ii)]. CrystEngComm 2014. [DOI: 10.1039/c4ce00799a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Starodub VA, Starodub TN. Radical anion salts and charge transfer complexes based on tetracyanoquinodimethane and other strong π-electron acceptors. RUSSIAN CHEMICAL REVIEWS 2014. [DOI: 10.1070/rc2014v083n05abeh004299] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Liao WQ, Zhou QQ, Li PF, Zhang Y. Crystal structure and phase transition of 2-methoxyanilinium perchlorate-18-crown-6. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2014.01.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Chen S, Zeng XC. Design of ferroelectric organic molecular crystals with ultrahigh polarization. J Am Chem Soc 2014; 136:6428-36. [PMID: 24717106 DOI: 10.1021/ja5017393] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Inspired by recent successful synthesis of room-temperature ferroelectric supramolecular charge-transfer complexes, i.e., tetrathiafulvalene (TTF)- and pyromellitic diimide (PMDI)-based crystals (Tayi et al. Nature 2012, 488, 485-489), three new ferroelectric two-component organic molecular crystals are designed based on the TTF and PMDI motifs and an extensive polymorph search. To achieve energetically favorable packing structures for the crystals, a newly developed computational approach that combines polymorph predictor with density functional theory (DFT) geometry optimization is employed. Tens of thousands of packing structures for the TTF- and PMDI-based crystals are first generated based on the limited number of asymmetric units in a unit cell as well as limited common symmetry groups for organocarbon crystals. Subsequent filtering of these packing structures by comparing with the reference structures yields dozens of promising crystal structures. Further DFT optimizations allow us to identify several highly stable packing structures that possess the space group of P2₁ as well as high to ultrahigh spontaneous polarizations (23-127 μC/cm(2)) along the crystallographic b axis. These values are either comparable to or much higher than the computed value (25 μC/cm(2)) or measured value (55 μC/cm(2)) for the state-of-the-art organic supramolecular systems. The high polarization arises from the ionic displacement. We further construct surface models to derive the electric-field-switched low-symmetry structures of new TTF- and PMDI-based crystals. By comparing the high-symmetry and low-symmetry crystal structures, we find that the ferroelectric polarization of the crystals is very sensitive to atomic positions, and a small molecular displacement may result in relatively high polarizations along the a and c axes, polarity reversal, and/or electronic contribution to polarization. If these newly designed TTF- and PMDI-based crystals with high polarizations are confirmed by experiments, the computer-aided ferroelectric material design on the basis of hydrogen-bonded charge-transfer complexes with flexible electron-donor and acceptor molecules would be proven valuable for expediting the search of room-temperature "displasive-type" ferroelectric organic crystals.
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Affiliation(s)
- Shuang Chen
- Department of Chemistry and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln , Lincoln, Nebraska 68588, United States
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Nakabayashi K, Miyasaka H. Systematic Tuning and Switching of Neutral and Ionic Phases in a Donor-Acceptor Chain Compound by Doping with Less-Active Donors and by Pressure Application. Chemistry 2014; 20:5121-31. [DOI: 10.1002/chem.201304420] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Indexed: 11/09/2022]
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28
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Xiong W, Zhang S, Ji C, Li L, Sun Z, Song C. Temperature-induced reversible isostructural phase transition in N-isopropylbenzylammonium trifluoromethanesulfonate. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.01.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Lieffrig J, Jeannin O, Frąckowiak A, Olejniczak I, Świetlik R, Dahaoui S, Aubert E, Espinosa E, Auban-Senzier P, Fourmigué M. Charge-Assisted Halogen Bonding: Donor-Acceptor Complexes with Variable Ionicity. Chemistry 2013; 19:14804-13. [DOI: 10.1002/chem.201302507] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Indexed: 02/04/2023]
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30
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Jin L, Sun SW, Wu DH, Zhang Y. Synthesis, structure and dielectric property of poly[(cyanomethyltriethylammonium) bis(μ2-chloro)-bis(μ3-chloro)-tri(μ2-bromo)trimercury(II)] and [cyanomethyltriethylammonium][bis(μ2-chloro)-bis(dichloromercury(II))]. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.06.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wu DH, Jin L. Temperature-induced isosymmetric reversible structural phase transition in triethylbenzylammonium perchlorate. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2012.12.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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33
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Miyasaka H. Control of charge transfer in donor/acceptor metal-organic frameworks. Acc Chem Res 2013; 46:248-57. [PMID: 23128042 DOI: 10.1021/ar300102t] [Citation(s) in RCA: 171] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Charge transfer (CT) of D(0)A(0) ↔ D(δ+)A(δ-) not only involves an electron transfer from D to A, but also generates a new spin set of S = 1/2 spins with an exchange interaction. Therefore, the control of CT in multidimensional frameworks could be an efficient way to design electronically/magnetically functional materials. The use of redox-active metal complexes as D and/or A building blocks expands the variety of such D/A frameworks with the formulation of D(m)A(n) (m, n ≥ 1), permitting the design of donor/acceptor metal-organic frameworks (D/A-MOFs). This Account summarizes our ongoing research on the design of D/A-MOFs and on the systematic control of CT in such D/A-MOFs toward the discovery of unique electronic/magnetic materials exhibiting nontrivial phenomena. For this purpose, the D/A combinations of carboxylate-bridged paddlewheel-type diruthenium(II,II) complexes ([Ru(2)(II,II)]) that act as one-electron (1e(-)) donors and polycyanoorganic acceptors such as 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) and N,N'-dicyanoquinodiimine (DCNQI) have been chosen. Even in the covalently bonded motif, the CT in this system is systematically dependent on the intrinsic ionization potential (I(D)) and electron affinity (E(A)) of the D and A units, respectively, which is controllable by chemical modification of the D/A units. As we consider the energy difference between the HOMO of D and the LUMO of A (ΔE(H-L)(DA)) instead of hν(CT) ∝ |I(D) - E(A)|, the neutral (N) and ionic (I) states can be defined as follows: (i) the D/A materials with ΔE(H-L)(DA) > 0 (i.e., the LUMO level of A is higher than the HOMO level of D) should be neutral, and (ii) complexes adopted when ΔE(H-L)(DA) < 0 are, meanwhile, ionic. Materials located near ΔE(H-L)(DA) ≈ 0, that is, at the boundary between the N and I phases, are candidates for the N-I transition driven by external stimuli such as temperature, pressure, and photoirradiation. Even in the ionic state, two distinct states could be isolated for the D(2)A type: (ii-1) the 1e(-) transferred D(2)A-MOFs provide mixed-valence systems of D(+)D(0)A(-) possibly involving intervalence CT, which produce magnetic correlations via radical A(-) units, and (ii-2) when the 2e(-) reduced form of A (e.g., TCNQ(2-)) is energetically favored beyond the on-site Coulomb repulsion on A, the oxidation state of D(+)(2)A(2-) is produced, for which magnetic measurements reveal a paramagnetic state attributed to the isolated D(+) units. The interspatial Coulombic interaction is another factor in determining the charge distribution in materials, which is related to the spatial Coulombic stability of D/A packing and possibly yields a mixture of N and I domains when it is more advantageous to get Coulombic gain than in the uniform N or I phase. Such a phase could be observed at the boundary between N and I phases involving the N-I transition. These charge-distributed states/phases are systematically demonstrated in a D/A-MOF system made by the combination of [Ru(2)(II,II)] and TCNQ/DCNQI; however, we immediately recognize the charge distribution of D/A-MOF only by understanding the nature of the starting D/A units. The present D/A-MOF system should be an intriguing platform to look for new functionalities with synergistic correlations among charge, spin, and lattice.
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Affiliation(s)
- Hitoshi Miyasaka
- Department of Chemistry, Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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Nishio M, Motokawa N, Takemura M, Miyasaka H. Modification of charge transfer in a two-dimensional donor/acceptor framework by the insertion of another donor-type molecule into electronegative interlayer pockets. Dalton Trans 2013; 42:15898-901. [DOI: 10.1039/c3dt51271a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Temperature-induced-to-configuration-regulated reversible isostructural phase transition in bis(triethylbenzylammonium) tetrachlorocobaltate(II). INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.06.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Isosymmetric temperature-triggered structural phase transition of dabcodiium chlorochromate chloride. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2011.12.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Nakabayashi K, Nishio M, Kubo K, Kosaka W, Miyasaka H. An ionicity diagram for the family of [{Ru2(CF3CO2)4}2(TCNQRx)] (TCNQRx = R-substituted 7,7,8,8-tetracyano-p-quinodimethane). Dalton Trans 2012; 41:6072-4. [DOI: 10.1039/c2dt30365e] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Novel Countercation in MMX-Type Mixed-Valence Chain Compound: Coexistence of Neutral and Protonated Amino Substituents. Polymers (Basel) 2011. [DOI: 10.3390/polym3041652] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Miyasaka H, Motokawa N, Chiyo T, Takemura M, Yamashita M, Sagayama H, Arima TH. Stepwise Neutral−Ionic Phase Transitions in a Covalently Bonded Donor/Acceptor Chain Compound. J Am Chem Soc 2011; 133:5338-45. [DOI: 10.1021/ja110007u] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hitoshi Miyasaka
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Sendai 980-8578, Japan
| | - Natsuko Motokawa
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Sendai 980-8578, Japan
| | - Tamiko Chiyo
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Sendai 980-8578, Japan
| | - Miho Takemura
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Sendai 980-8578, Japan
| | - Masahiro Yamashita
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Sendai 980-8578, Japan
| | - Hajime Sagayama
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Taka-hisa Arima
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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Ding LJ, Yao KL, Fu HH. Spin–lattice coupling driven ferroelectric transition in one-dimensional organic quantum magnets. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02025g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Saito G, Ikegami H, Yoshida Y, Drozdova OO, Nishimura K, Horiuchi S, Yamochi H, Otsuka A, Hiramatsu T, Maesato M, Nakamura T, Akutagawa T, Yumoto T. Ionicity Phase Diagram of Trifluoromethyl-TCNQ (CF3TCNQ) Charge-Transfer Solids. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2010. [DOI: 10.1246/bcsj.20100102] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ye HY, Cai HL, Ge JZ, Xiong RG. Reversible structural phase transition of pyridinium-4-carboxylic acid perchlorate. J Appl Crystallogr 2010. [DOI: 10.1107/s0021889810024039] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Pyridinium-4-carboxylic acid perchlorate (C6H6NO2·ClO4) was synthesized and separated as crystals. Differential scanning calorimetry measurement shows that this compound undergoes a reversible phase transition at about 122 K with a heat hysteresis of 1.8 K. A dielectric anomaly observed at 127 K further confirms the phase transition. The low-temperature (LT;T= 103 K) structure has space groupP21/cand cell parametersa= 17.356 (6),b= 13.241 (3),c= 16.161 (7) Å, β = 138.055 (17)°. The high-temperature (HT;T= 298 K) structure has space groupP21/cand cell parametersa= 5.5046 (11),b= 13.574 (3),c= 11.834 (2) Å, β = 99.35 (3)°, but can be re-described using new axesa′ =a,b′ =b,c′ = −2a+c,V′ =Vto give the cella′ = 5.5046 (11),b′ = 13.574 (3),c′ = 17.424 (3) Å, β′ = 137.92 (3)° and space groupP21/c. The associated coordinate transformation isx′ =x+ 2z,y′ =y,z′ =zand the associated reflection index transformation ish′ =h,k′ =k,l′ =l− 2h. The relationship between the two cells is 3a,b,c(HT) approximatesa,b,c(LT). The crystal comprises one-dimensional hydrogen-bonded chains of the pyridinium-4-carboxylic acid cations and perchlorate anions. A precise analysis of the main packing and structural differences as well as the changes in the intermolecular interactions between the HT phase and the LT phase reveals that the disorder–order transition of the perchlorate anions may be the driving force of the transition, and the hydrogen-bonding effect may contribute to the transition as a secondary parameter.
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Miyasaka H, Motokawa N, Matsunaga S, Yamashita M, Sugimoto K, Mori T, Toyota N, Dunbar KR. Control of Charge Transfer in a Series of Ru2II,II/TCNQ Two-Dimensional Networks by Tuning the Electron Affinity of TCNQ Units: A Route to Synergistic Magnetic/Conducting Materials. J Am Chem Soc 2010; 132:1532-44. [DOI: 10.1021/ja909489s] [Citation(s) in RCA: 155] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hitoshi Miyasaka
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, X-ray Research Laboratory, Rigaku Co. Ltd., 3-9-12 Matsubara-cho, Akishima, Tokyo 196-8666, Japan, Department of Physics, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, and Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012
| | - Natsuko Motokawa
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, X-ray Research Laboratory, Rigaku Co. Ltd., 3-9-12 Matsubara-cho, Akishima, Tokyo 196-8666, Japan, Department of Physics, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, and Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012
| | - Satoshi Matsunaga
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, X-ray Research Laboratory, Rigaku Co. Ltd., 3-9-12 Matsubara-cho, Akishima, Tokyo 196-8666, Japan, Department of Physics, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, and Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012
| | - Masahiro Yamashita
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, X-ray Research Laboratory, Rigaku Co. Ltd., 3-9-12 Matsubara-cho, Akishima, Tokyo 196-8666, Japan, Department of Physics, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, and Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012
| | - Kunihisa Sugimoto
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, X-ray Research Laboratory, Rigaku Co. Ltd., 3-9-12 Matsubara-cho, Akishima, Tokyo 196-8666, Japan, Department of Physics, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, and Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012
| | - Tatsuya Mori
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, X-ray Research Laboratory, Rigaku Co. Ltd., 3-9-12 Matsubara-cho, Akishima, Tokyo 196-8666, Japan, Department of Physics, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, and Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012
| | - Naoki Toyota
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, X-ray Research Laboratory, Rigaku Co. Ltd., 3-9-12 Matsubara-cho, Akishima, Tokyo 196-8666, Japan, Department of Physics, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, and Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012
| | - Kim R. Dunbar
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, X-ray Research Laboratory, Rigaku Co. Ltd., 3-9-12 Matsubara-cho, Akishima, Tokyo 196-8666, Japan, Department of Physics, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan, and Department of Chemistry, Texas A&M University, PO Box 30012, College Station, Texas 77842-3012
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Murata T, Honda G, Chong CH, Makihara M, Nishimura K, Khasanov S, Otsuka A, Saito G. Charge-Transfer Complexes between Indoline–Tricyanoquinodimethane Compounds and 7,7,8,8-Tetracyanoquinodimethane. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.1492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Murata T, Saito G, Nishimura K, Chong CH, Makihara M, Honda G, Enomoto Y, Khasanov S, Yamochi H, Otsuka A, Kamada K, Ohta K, Kawamata J. Crystal Structures, Degree of Charge Transfer, and Non-Linear Optical Characteristics of Intramolecular Charge-Transfer Compounds: Indoline-Substituted Tricyanoquinodimethanes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.1131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
Ferroelectricity results from one of the most representative phase transitions in solids, and is widely used for technical applications. However, observations of ferroelectricity in organic solids have until recently been limited to well-known polymer ferroelectrics and only a few low-molecular-mass compounds. Whereas the traditional use of dipolar molecules has hardly succeeded in producing ferroelectricity in general, here we review advances in the synthesis of new organic materials with promising ferroelectric properties near room temperature, using design principles in analogy to inorganic compounds. These materials are based on non-covalent molecules formed by two or more components, in which ferroelectricity arises either from molecular displacements or from the collective transfer of electrons or protons. The principle of using multi-component molecular compounds leads to a much broader design flexibility and may therefore facilitate the development of future functional organics.
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Affiliation(s)
- Sachio Horiuchi
- Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8562, Japan.
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Saito G, Murata T. Mixed valency in organic charge transfer complexes. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2008; 366:139-50. [PMID: 17846015 DOI: 10.1098/rsta.2007.2146] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Mixed-valence (partial charge transfer state) and segregated stacking are the key factors for constructing organic metals. Here, we discuss the ionicity phase diagrams for a variety of charge transfer systems to provide a strategy for the development of functional organic materials (Mott insulator, semiconductor, superconductor, metal, complex isomer, neutral-ionic system, etc.).
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Affiliation(s)
- Gunzi Saito
- Division of Chemistry, Graduate School of Science, Kyoto University, Oiwakecho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan.
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Motokawa N, Oyama T, Matsunaga S, Miyasaka H, Sugimoto K, Yamashita M, Lopez N, Dunbar KR. A ladder based on paddlewheel diruthenium(ii, ii) rails connected by TCNQ rungs: a polymorph of the hexagonal 2-D network phase. Dalton Trans 2008:4099-102. [DOI: 10.1039/b808503j] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Horiuchi S, Kumai R, Tokura Y. Hydrogen-bonded donor–acceptor compounds for organic ferroelectric materials. Chem Commun (Camb) 2007:2321-9. [PMID: 17844735 DOI: 10.1039/b617881b] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organic ferroelectrics are multifunctional candidates for future organic electronic and optical devices. In spite of their potential, only a few organic compounds are known to exhibit a ferroelectric transition. The conventional approach to ferroelectrics, in general, relies on the use of asymmetric dipolar molecules and/or substituents. Recently, distinct design strategies have been developed using the molecular compounds of binary- or multi-components, combined with "non-covalent" forces: charge-transfer interactions and/or hydrogen bonding. This article focuses on the supramolecular systems of hydrogen-bonded acid and base molecules. Ferroelectricity and a significant dielectric response, as well as an antiferroelectric ordering induced by proton transfer, are demonstrated in the hydrogen-bonded chains composed of 2,5-dihydroxy-p-benzoquinone derivatives and nitrogen-containing aromatic bases.
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Affiliation(s)
- Sachio Horiuchi
- Correlated Electron Research Center (CERC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8562, Japan.
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