1
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Wang X, Zhang N, Kou HZ. Substituent effects on spin-crossover Fe(II)N 4O 2 pyrenylhydrazone complexes. Dalton Trans 2024. [PMID: 39101717 DOI: 10.1039/d4dt00904e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/06/2024]
Abstract
Multifunctional magnetic materials have broad application prospects in molecular switches and information storage. In this study, four mononuclear Fe(II) complexes are synthesized using a series of pyrenylhydrazone ligands HL1-4. Two deprotonated ligands are coordinated to the iron(II) ions in an enolic form, leading to neutral complexes FeII(Lx)2·xsol with a FeIIN4O2 octahedral coordination environment. Magnetic measurements suggest that complex Fe(L1)2·2ACE (1·2ACE, ACE = acetone) is mainly low spin below 300 K and complex Fe(L3)2·ACE (3·ACE) is high spin, whereas complexes Fe(L2)2 (2) and Fe(L4)2·6H2O (4·6H2O) exhibit gradual spin crossover behavior. The spin states of complexes 1-4 are confirmed by single-crystal X-ray diffraction analysis. The substituent effect on the magnetic properties of the complexes is significant in this system. Temperature-dependent fluorescence emission spectra show the coexistence but no coupling effect of spin crossover and fluorescence for complexes 2 and 4·6H2O.
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Affiliation(s)
- Xuan Wang
- Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.
| | - Nan Zhang
- Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.
| | - Hui-Zhong Kou
- Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.
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2
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Kobayashi F, Yoshida A, Gemba M, Takatsu Y, Tadokoro M. Solvent vapour-responsive structural transformations in molecular crystals composed of a luminescent mononuclear aluminium(III) complex. Dalton Trans 2024; 53:11689-11696. [PMID: 38847374 DOI: 10.1039/d4dt00747f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
Investigations into the construction of functional molecular crystals and their external stimuli-induced structural transformations represent compelling research topics, particularly for the advancement of sensors and memory devices. However, reports on the development of molecular crystals constructed from discrete mononuclear complex units and exhibiting structural transformations via the adsorption/desorption of guest molecules are scarce. In this study, we synthesised three molecular crystals composed of [Al(sap)(acac)(H2O)]·(solvent) (H2sap = 2-salicylideneaminophenol, acac = acetylacetonate, solvent = Me2CO (Al·Me2CO), MeCN (Al·MeCN), or DMSO (Al·DMSO)), and demonstrated solvent vapour-responsive reversible crystal-to-crystal structural transformations in Al·Me2CO and Al·MeCN. For Al·DMSO, exposure to DMSO vapour led to the formation of DMSO-coordinated compound [Al(sap)(acac)(DMSO)], indicating an irreversible structural transformation. This solvent vapour-responsive system incorporates a luminescent mononuclear aluminium(III) complex (λmax = 539-552 nm, Φem = 0.07-0.27) as the molecular building unit for the porous-like framework. Therefore, we synthesised a new functional molecular material and a potential molecular building unit that facilitates guest fixation through hydrogen-bonding.
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Affiliation(s)
- Fumiya Kobayashi
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Azuki Yoshida
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Misato Gemba
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Yuta Takatsu
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Makoto Tadokoro
- Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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3
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Ji T, Su S, Wu S, Hori Y, Shigeta Y, Huang Y, Zheng W, Xu W, Zhang X, Kiyanagi R, Munakata K, Ohhara T, Nakanishi T, Sato O. Development of an Fe II Complex Exhibiting Intermolecular Proton Shifting Coupled Spin Transition. Angew Chem Int Ed Engl 2024; 63:e202404843. [PMID: 38622084 DOI: 10.1002/anie.202404843] [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: 03/11/2024] [Revised: 04/13/2024] [Accepted: 04/15/2024] [Indexed: 04/17/2024]
Abstract
In this study, we investigated reversible intermolecular proton shifting (IPS) coupled with spin transition (ST) in a novel FeII complex. The host FeII complex and the guest carboxylic acid anion were connected by intermolecular hydrogen bonds (IHBs). We extended the intramolecular proton transfer coupled ST phenomenon to the intermolecular system. The dynamic phenomenon was confirmed by variable-temperature single-crystal X-ray diffraction, neutron crystallography, and infrared spectroscopy. The mechanism of IPS was further validated using density functional theory calculations. The discovery of IPS-coupled ST in crystalline molecular materials provides good insights into fundamental processes and promotes the design of novel multifunctional materials with tunable properties for various applications, such as optoelectronics, information storage, and molecular devices.
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Affiliation(s)
- Tianchi Ji
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Shengqun Su
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Shuqi Wu
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Yuta Hori
- Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Yasuteru Shigeta
- Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Yubo Huang
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Wenwei Zheng
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Wenhuang Xu
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Xiaopeng Zhang
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Ryoji Kiyanagi
- J-PARC Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan
| | - Koji Munakata
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society, 162-1 Shirakata, Tokai, Ibaraki, 319-1106, Japan
| | - Takashi Ohhara
- J-PARC Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan
| | - Takumi Nakanishi
- Institute for Materials Research, Tohoku University, 211 Katahira, Aoba Ward, Sendai, Miyagi, 980-8577, Japan
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
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4
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Zakrzewski J, Liberka M, Wang J, Chorazy S, Ohkoshi SI. Optical Phenomena in Molecule-Based Magnetic Materials. Chem Rev 2024; 124:5930-6050. [PMID: 38687182 PMCID: PMC11082909 DOI: 10.1021/acs.chemrev.3c00840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Since the last century, we have witnessed the development of molecular magnetism which deals with magnetic materials based on molecular species, i.e., organic radicals and metal complexes. Among them, the broadest attention was devoted to molecule-based ferro-/ferrimagnets, spin transition materials, including those exploring electron transfer, molecular nanomagnets, such as single-molecule magnets (SMMs), molecular qubits, and stimuli-responsive magnetic materials. Their physical properties open the application horizons in sensors, data storage, spintronics, and quantum computation. It was found that various optical phenomena, such as thermochromism, photoswitching of magnetic and optical characteristics, luminescence, nonlinear optical and chiroptical effects, as well as optical responsivity to external stimuli, can be implemented into molecule-based magnetic materials. Moreover, the fruitful interactions of these optical effects with magnetism in molecule-based materials can provide new physical cross-effects and multifunctionality, enriching the applications in optical, electronic, and magnetic devices. This Review aims to show the scope of optical phenomena generated in molecule-based magnetic materials, including the recent advances in such areas as high-temperature photomagnetism, optical thermometry utilizing SMMs, optical addressability of molecular qubits, magneto-chiral dichroism, and opto-magneto-electric multifunctionality. These findings are discussed in the context of the types of optical phenomena accessible for various classes of molecule-based magnetic materials.
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Affiliation(s)
- Jakub
J. Zakrzewski
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
- Doctoral
School of Exact and Natural Sciences, Jagiellonian
University, Lojasiewicza
11, 30-348 Krakow, Poland
| | - Michal Liberka
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
- Doctoral
School of Exact and Natural Sciences, Jagiellonian
University, Lojasiewicza
11, 30-348 Krakow, Poland
| | - Junhao Wang
- Department
of Materials Science, Faculty of Pure and Applied Science, University of Tsukuba, 1-1-1 Tonnodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Szymon Chorazy
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Shin-ichi Ohkoshi
- Department
of Chemistry, School of Science, The University
of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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5
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Nakanishi T, Hori Y, Shigeta Y, Sato H, Kiyanagi R, Munakata K, Ohhara T, Okazawa A, Shimada R, Sakamoto A, Sato O. Development of an Iron(II) Complex Exhibiting Thermal- and Photoinduced Double Proton-Transfer-Coupled Spin Transition in a Short Hydrogen Bond. J Am Chem Soc 2023; 145:19177-19181. [PMID: 37623927 DOI: 10.1021/jacs.3c06323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
Multiple proton transfer (PT) controllable by external stimuli plays a crucial role in fundamental chemistry, biological activity, and material science. However, in crystalline systems, controlling multiple PT, which results in a distinct protonation state, remains challenging. In this study, we developed a novel tridentate ligand and iron(II) complex with a short hydrogen bond (HB) that exhibits a PT-coupled spin transition (PCST). Single-crystal X-ray and neutron diffraction measurements revealed that the positions of the two protons in the complex can be controlled by temperature and photoirradiation based on the thermal- and photoinduced PCST. The obtained results suggest that designing molecules that form short HBs is a promising approach for developing multiple PT systems in crystals.
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Affiliation(s)
- Takumi Nakanishi
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yuta Hori
- Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Yasuteru Shigeta
- Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Hiroyasu Sato
- Rigaku Corporation, 3-9-12 Matsubaracho, Akishima, Tokyo 196-8666, Japan
| | - Ryoji Kiyanagi
- J-PARC center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Koji Munakata
- J-PARC center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Takashi Ohhara
- J-PARC center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Atsushi Okazawa
- Department of Electrical Engineering and Bioscience, Waseda University, Okubo 3-4-1, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Rintaro Shimada
- Graduate School of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan
| | - Akira Sakamoto
- Graduate School of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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6
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Huang P, Yoshida Y, Komatsu T, Nakamura Y, Sugimoto K, Kitagawa H. Isomerization-Controlled Proton-Electron Coupling in a π-Planar Metal Complex. Inorg Chem 2023; 62:1135-1140. [PMID: 36632676 DOI: 10.1021/acs.inorgchem.2c03417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Proton-coupled electron transfer (PCET) is a ubiquitous and fundamental process in biochemistry and electrochemistry performed by transition-metal complexes. Most synthetic efforts have been devoted to selecting the components, that is, metal ions and ligands, to control the proton-electron coupling. Here, we show the first example of controlling the proton-electron coupling using the cis-trans metal-ligand isomerization in a π-planar platinum complex, Pt(itsq)2 (itsq1-: o-iminothiosemiquinonate). Both the isomers, which were obtained separately, were characterized by single-crystal X-ray diffraction, and the cis-to-trans isomerization was achieved by immersing in organic solvents. Theoretical calculations predicted that the proton-electron coupling evaluated from the energetic stabilization of the lowest unoccupied molecular orbital by protonation varies greatly depending on the geometrical configuration compared to the metal substitution.
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Affiliation(s)
- Pingping Huang
- Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto606-8502, Japan
| | - Yukihiro Yoshida
- Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto606-8502, Japan
| | - Tokutaro Komatsu
- School of Medicine, Nihon University, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo173-8610, Japan
| | - Yuiga Nakamura
- Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo679-5198, Japan
| | - Kunihisa Sugimoto
- Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo679-5198, Japan
| | - Hiroshi Kitagawa
- Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto606-8502, Japan
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7
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Su S, Wu S, Huang Y, Xu W, Gao K, Okazawa A, Okajima H, Sakamoto A, Kanegawa S, Sato O. Photoinduced Persistent Polarization Change in a Spin Transition Crystal. Angew Chem Int Ed Engl 2022; 61:e202208771. [DOI: 10.1002/anie.202208771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Sheng‐Qun Su
- Institute for Materials Chemistry and Engineering and IRCCS Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Shu‐Qi Wu
- Institute for Materials Chemistry and Engineering and IRCCS Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Yu‐Bo Huang
- Institute for Materials Chemistry and Engineering and IRCCS Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Wen‐Huang Xu
- Institute for Materials Chemistry and Engineering and IRCCS Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Kai‐Ge Gao
- College of Physical Science and Technology Yangzhou University Jiangsu 225009 P. R. China
| | - Atsushi Okazawa
- Department of Electrical Engineering and Bioscience Waseda University Okubo 3-4-1, Shinjuku-ku Tokyo 169-8555 Japan
| | - Hajime Okajima
- Faculty of Science and Engineering Chuo University 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Akira Sakamoto
- Graduate School of Science and Engineering Aoyama Gakuin University 5-10-1 Fuchinobe, Chuo-ku Sagamihara 252-5258 Japan
| | - Shinji Kanegawa
- Institute for Materials Chemistry and Engineering and IRCCS Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering and IRCCS Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
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8
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Dey B, Chandrasekhar V. Fe II spin crossover complexes containing N 4O 2 donor ligands. Dalton Trans 2022; 51:13995-14021. [PMID: 36040413 DOI: 10.1039/d2dt01967a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spin crossover (SCO) is one of the most studied magnetic bistable phenomena because of its application in the field of multifunctional magnetic materials. FeII complexes in a N6 coordination environment have been the most well-studied in terms of their SCO behaviour. Other coordination environments, notably the N4O2 coordination environment, has also been quite effective in inducing SCO behaviour in the corresponding FeII complexes. This review deals with such systems. The three ligand families that are discussed are: Jager type ligands, hydrazone based ligands and tridentate ligands having salicylaldehyde derivatives. These ligands allow the assembly of both mononuclear and multinuclear complexes that exhibit cooperative spin transitions. Also, FeII complexes obtained from some of these ligands are multifunctional and exhibit a coupling of optical and magnetic properties. Most of the FeII complexes obtained from these families of ligands are charge neutral which allows easy surface deposition. Further, modulation of these ligand families allows a fine tuning of the ligand field strength which results in varying SCO behavior. In addition some of the FeII complexes derived from these ligands exhibit a light induced excited spin state trapping (LIESST) effect. All of the above aspects are reviewed in this review.
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Affiliation(s)
- Bijoy Dey
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad - 500046, Telangana, India.
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad - 500046, Telangana, India. .,Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
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9
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Su SQ, Wu SQ, Huang YB, Xu WH, Gao KG, Okazawa A, Okajima H, Sakamoto A, Kanegawa S, Sato O. Photoinduced Persistent Polarization Change in a Spin Transition Crystal. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sheng-Qun Su
- Kyushu University: Kyushu Daigaku Institute for Materials Chemistry and Engineering 819-0395 Fukuoka JAPAN
| | - Shu-Qi Wu
- Kyushu University: Kyushu Daigaku Institute for Materials Chemistry and Engineering 819-0395 Fukuoka JAPAN
| | - Yu-Bo Huang
- Kyushu University: Kyushu Daigaku Institute for Materials Chemistry and Engineering 819-0395 Fukuoka JAPAN
| | - Wen-Huang Xu
- Kyushu University: Kyushu Daigaku Institute for Materials Chemistry and Engineering 819-0395 Fukuoka JAPAN
| | - Kai-Ge Gao
- Yangzhou University College of Physical Science and Technology 225009 Jiangsu CHINA
| | - Atsushi Okazawa
- Waseda University: Waseda Daigaku Department of Electrical Engineering and Bioscience 169-8555 Tokyo JAPAN
| | - Hajime Okajima
- Chuo University: Chuo Daigaku Faculty of Science and Engineering 112-8551 Tokyo JAPAN
| | - Akira Sakamoto
- Aoyama Gakuin University: Aoyama Gakuin Daigaku Graduate School of Science and Engineering 252-5258 sagamihara JAPAN
| | - Shinji Kanegawa
- Kyushu University: Kyushu Daigaku Institute for Materials Chemistry and Engineering and IRCCS 819-0395 Fukuoka JAPAN
| | - Osamu Sato
- Kyushu University Institute for Materials Chemistry and Engineering 744, Motooka, Nishi-ku 819-0395 Fukuoka JAPAN
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10
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Mori H, Yokomori S, Dekura S, Ueda A. Proton-electron-coupled functionalities of conductivity, magnetism, and optical properties in molecular crystals. Chem Commun (Camb) 2022; 58:5668-5682. [PMID: 35420071 DOI: 10.1039/d1cc06826a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Proton-electron-coupled reactions, specifically proton-coupled electron transfer (PCET), in biological and chemical processes have been extensively investigated for use in a wide variety of applications, including energy conversion and storage. However, the exploration of the functionalities of the conductivity, magnetism, and dielectrics by proton-electron coupling in molecular materials is challenging. Dynamic and static proton-electron-coupled functionalities are to be expected. This feature article highlights the recent progress in the development of functionalities of dynamic proton-electron coupling in molecular materials. Herein, single-unit conductivity by self-doping, quantum spin liquid state coupled with quantum fluctuation of protons, switching of conductivity and magnetism triggered by the disorder-order transition of deuterons, and their external responses under pressure and in the presence of an electric field are introduced. In addition, as for the functionalities of proton-d/π-electron coupling in metal dithiolene complexes, magnetic switching with multiple PCET and vapochromism induced by electron transfer through hydrogen-bond (H-bond) formation is introduced experimentally and theoretically. We also outlined the basic and applied issues and potential challenges for development of proton-electron-coupled molecular materials, functionalities, and devices.
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Affiliation(s)
- Hatsumi Mori
- The Institute for Solid State Physics, the University of Tokyo, 5-1-5 Kashiwabiha, Kashiwa 277-8581, Japan
| | - So Yokomori
- The Institute for Solid State Physics, the University of Tokyo, 5-1-5 Kashiwabiha, Kashiwa 277-8581, Japan
| | - Shun Dekura
- The Institute for Solid State Physics, the University of Tokyo, 5-1-5 Kashiwabiha, Kashiwa 277-8581, Japan
| | - Akira Ueda
- Department of Chemistry, Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
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11
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Li HQ, Sun YC, Shi L, Chen FL, Shen FX, Zhao Y, Wang XY. Modulating the Structures and Magnetic Properties of Dy(III) Single-Molecule Magnets through Acid-Base Regulation. Inorg Chem 2022; 61:2272-2283. [PMID: 35025491 DOI: 10.1021/acs.inorgchem.1c03639] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chemical modulation on the structures and physical properties of the coordination complexes is of great interest for the preparation of new functional materials. By changing the acidity or basicity of the reaction medium, the deprotonation degree of a multidentate ligand with multiple active protons, H4daps (H4daps = N',N'″-((1E,1'E)-pyridine-2,6-diylbis(ethan-1-yl-1-ylidene))bis(2-hydroxybenzohydrazide)), can be regulated on purpose. With this ligand of different deprotonation and charges, three new DyIII complexes ([Dy(H3daps)(CH3COO)2(EtOH)]·CH3COOH (1Dy), [Dy2(H2daps)2(EtOH)2(H2O)2(MeOH)2](CF3SO3)2·(H2O)2 (2Dy), and [Dy3(H1daps)2(H2daps)(μ3-OH)(EtOH)(H2O)] (3Dy)) of different nuclearities (mono-, di-, and trinuclear for 1Dy to 3Dy, respectively) have been synthesized and characterized structurally and magnetically. Analyses on the related bond lengths and resulting hydrogen bond modes in the complexes provide the details of the deprotonation position and the charge of the ligands, which can be in the form of H3daps-, H2daps2-, and H1daps3-. Interestingly, the more deprotonated ligand can act as a bridging ligand between the DyIII centers using the phenol and/or carbonyl oxygen atoms, which leads to the multinuclear structures. Magnetic studies on these complexes revealed that complex 1Dy is a field-induced single-molecule magnet (SMM), while complexes 2Dy and 3Dy show SMM behavior under a zero dc field.
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Affiliation(s)
- Hong-Qing Li
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yu-Chen Sun
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Le Shi
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Feng-Li Chen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Fu-Xing Shen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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12
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Klokishner S, Reu O, Roman M. Valence tautomeric transformation in the [CrCo] compound: exploration of cooperative interactions. Phys Chem Chem Phys 2021; 23:21714-21728. [PMID: 34581720 DOI: 10.1039/d1cp03209g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A crystal containing the heterometallic Cr-ligand-Co cluster with an unpaired electron on the ligand as a structural unit is examined. The developed model which describes the magnetic and polarizability characteristics of this crystal takes into account that the electron residing on the ligand can be transferred to the Co-ion, thus converting the diamagnetic ls-CoIII ion into the paramagnetic hs-CoII one. Since this transformation is accompanied by electron density redistribution and elongation of the Co-N bond lengths, the vibronic interaction of the Co-ion with totally symmetric displacements of the nearest surroundings and cooperative dipole-dipole and electron-deformational interactions are accounted for as well. The exchange interactions between the CrIII ion and the electron localized on the ligand as well as in the CrIII-hs-CoII pair are also included in consideration; the parameters of these interactions are estimated within the framework of the DFT method. Bistability in the magnetic and polarization characteristics is predicted for certain strengths of intra- and intercluster interactions in the crystal under study. Within the framework of the developed approach an explanation of the observed magnetic properties of the [Cr(SS-cth)(Co(RR-cth)(μ-dhbq))](PF6)2Cl crystal is given.
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Affiliation(s)
- Sophia Klokishner
- Institute of Applied Physics, MD-2028, Academy str. 5, MD-2028, Chişinau, Republic of Moldova.
| | - Oleg Reu
- Institute of Applied Physics, MD-2028, Academy str. 5, MD-2028, Chişinau, Republic of Moldova.
| | - Marianna Roman
- Institute of Applied Physics, MD-2028, Academy str. 5, MD-2028, Chişinau, Republic of Moldova.
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Abstract
The complexes of lanthanide metals, especially dysprosium, can generally exhibit excellent magnetic properties. By means of modifying ligands, dual functions or even multi-functions can be achieved. Here, we synthesized an eight-coordinate Dy(III) complex 1, [Dy(HL-o)2(MeOH)2](ClO4)3·4.5MeOH, which is single-molecule magnet (SMM), and the introduction of the rhodamine 6G chromophore in the ring-opened ligand HL-o realizes ligand-centered fluorescence in addition to SMM. Magnetic measurements and ab initio calculations indicate that the magnetic relaxation for complex 1 should be due to the Raman relaxation process. Studies on magneto-structural correlationship of the rhodamine salicylaldehyde hydrazone Dy(III) complexes show that the calculated energy of the first Kramers Doublet (EKD1) is basically related to the Ophenoxy-Dy-Ophenoxy bond angle, i.e., the larger Ophenoxy-Dy-Ophenoxy bond angle corresponds to a larger EKD1.
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14
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Synthesis of a Ru(II) Complex with a Naphthoquinone-Annelated Imidazole Ligand Exhibiting Proton-Responsive Redox and Luminescent Behavior. INORGANICS 2021. [DOI: 10.3390/inorganics9040024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A mononuclear ruthenium complex, [RuII(L)(bpy)2](PF6), with a naphthoquinone-annelated imidazole ligand HL (2-(pyridin-2-yl)-1H-naphtho[2,3-d]imidazole-4,9-dione) was synthesized and structurally characterized. Electrochemical study reveals that the Ru complex shows four reversible redox waves at +0.98 V, −1.13 V, −1.53 V, and −1.71 V versus SCE in acetonitrile, which are assigned to Ru(II)/Ru(III), L−/L•2−, and two bpy/bpy•− redox couples, respectively. The redox potential of Ru(II)/Ru(III) was positively shifted upon the addition of trifluoromethanesulfonic acid due to protonation of the L− moiety, leading to stabilization of the Ru 4d orbital. In UV-vis absorption measurements for the Ru complex in acetonitrile, a metal-to-ligand charge transfer (MLCT) band was observed at 476 nm, which was shifted to 450 nm by protonation, which might be due to a decrease in the electron delocalization and stabilization of the π orbitals in L−. The blue shift of the MLCT band by protonation was associated with a shift of an emission band from 774 nm to 620 nm, which could be caused by the decreased electronic delocalization in the MLCT excited state. These electrochemical and spectroscopic changes were reversible for the protonation/deprotonation stimuli.
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15
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Gebretsadik T, Yang Q, Wu J, Tang J. Hydrazone based spin crossover complexes: Behind the extra flexibility of the hydrazone moiety to switch the spin state. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213666] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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16
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Jornet-Mollá V, Giménez-Saiz C, Cañadillas-Delgado L, Yufit DS, Howard JAK, Romero FM. Interplay between spin crossover and proton migration along short strong hydrogen bonds. Chem Sci 2020; 12:1038-1053. [PMID: 34163870 PMCID: PMC8179063 DOI: 10.1039/d0sc04918b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 11/16/2020] [Indexed: 12/19/2022] Open
Abstract
The iron(ii) salt [Fe(bpp)2](isonicNO)2·HisonicNO·5H2O (1) (bpp = 2,6-bis(pyrazol-3-yl)pyridine; isonicNO = isonicotinate N-oxide anion) undergoes a partial spin crossover (SCO) with symmetry breaking at T 1 = 167 K to a mixed-spin phase (50% high-spin (HS), 50% low-spin (LS)) that is metastable below T 2 = 116 K. Annealing the compound at lower temperatures results in a 100% LS phase that differs from the initial HS phase in the formation of a hydrogen bond (HB) between two water molecules (O4W and O5W) of crystallisation. Neutron crystallography experiments have also evidenced a proton displacement inside a short strong hydrogen bond (SSHB) between two isonicNO anions. Both phenomena can also be detected in the mixed-spin phase. 1 undergoes a light-induced excited-state spin trapping (LIESST) of the 100% HS phase, with breaking of the O4W⋯O5W HB and the onset of proton static disorder in the SSHB, indicating the presence of a light-induced activation energy barrier for proton motion. This excited state shows a stepped relaxation at T 1(LIESST) = 68 K and T 2(LIESST) = 76 K. Photocrystallography measurements after the first relaxation step reveal a single Fe site with an intermediate geometry, resulting from the random distribution of the HS and LS sites throughout the lattice.
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Affiliation(s)
- Verónica Jornet-Mollá
- Instituto de Ciencia Molecular, Universitat de València P. O. Box 22085 46071 València Spain
| | - Carlos Giménez-Saiz
- Instituto de Ciencia Molecular, Universitat de València P. O. Box 22085 46071 València Spain
| | | | - Dmitry S Yufit
- Department of Chemistry, Durham University Durham DH1 3LE UK
| | | | - Francisco M Romero
- Instituto de Ciencia Molecular, Universitat de València P. O. Box 22085 46071 València Spain
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17
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Nakanishi T, Hori Y, Wu S, Sato H, Okazawa A, Kojima N, Horie Y, Okajima H, Sakamoto A, Shiota Y, Yoshizawa K, Sato O. Three-Step Spin State Transition and Hysteretic Proton Transfer in the Crystal of an Iron(II) Hydrazone Complex. Angew Chem Int Ed Engl 2020; 59:14781-14787. [PMID: 32452130 DOI: 10.1002/anie.202006763] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Indexed: 11/06/2022]
Abstract
A proton-electron coupling system, exhibiting unique bistability or multistability of the protonated state, is an attractive target for developing new switchable materials based on proton dynamics. Herein, we present an iron(II) hydrazone crystalline compound, which displays the stepwise transition and bistability of proton transfer at the crystal level. These phenomena are realized through the coupling with spin transition. Although the multi-step transition with hysteresis has been observed in various systems, the corresponding behavior of proton transfer has not been reported in crystalline systems; thus, the described iron(II) complex is the first example. Furthermore, because proton transfer occurs only in one of the two ligands and π electrons redistribute in it, the dipole moment of the iron(II) complexes changes with the proton transfer, wherein the total dipole moment in the crystal was canceled out owing to the antiferroelectric-like arrangement.
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Affiliation(s)
- Takumi Nakanishi
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Yuta Hori
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.,Center for Computational Sciences, University of Tsukuba, Tsukuba, 305-8577, Japan
| | - Shuqi Wu
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Hiroyasu Sato
- Rigaku Corporation, 3-9-12 Matsubaracho, Akishima, Tokyo, 196-8666, Japan
| | - Atsushi Okazawa
- Department of Basic Science, Graduation School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902, Japan.,Current address: Division of Chemistry, Institution of Liberal Education, Nihon University School of Medicine, 30-1 Oyaguchi Uemachi, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Norimichi Kojima
- Department of Basic Science, Graduation School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902, Japan
| | - Yusuke Horie
- Graduate School of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252-5258, Japan
| | - Hajime Okajima
- Graduate School of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252-5258, Japan
| | - Akira Sakamoto
- Graduate School of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252-5258, Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering & IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
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18
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Astashkin AV, Utterback RD, Sung YS, Tomat E. Iron Complexes of an Antiproliferative Aroyl Hydrazone: Characterization of Three Protonation States by Electron Paramagnetic Resonance Methods. Inorg Chem 2020; 59:11377-11384. [PMID: 32799490 PMCID: PMC8223696 DOI: 10.1021/acs.inorgchem.0c01120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Tridentate aroyl hydrazones are effective metal chelators in biological settings, and their activity has been investigated extensively for medicinal applications in metal overload, cancer, and neurodegenerative diseases. The aroyl hydrazone motif is found in the recently reported prochelator (AH1-S)2, which has shown antiproliferative proapoptotic activity in mammalian cancer cell lines. Intracellular reduction of this disulfide prochelator leads to the formation of mercaptobenzaldehyde benzoylhydrazone chelator AH1 and to iron sequestration, which in turn impacts cell growth. Herein, we investigate the iron coordination chemistry of AH1 to determine the structural and spectroscopic properties of the iron complexes in the solid state and in solution. A neutral iron(III) complex of 2:1 ligand-to-metal stoichiometry was isolated and characterized fully to reveal two different binding modes for the tridentate AH1 ligand. Specifically, one ligand binds in the monoanionic keto form, whereas the other ligand coordinates as a dianionic enolate. Continuous-wave electron paramagnetic resonance experiments in frozen solutions indicated that this neutral complex is one of three low-spin iron(III) complexes observed depending on the pH of the solution. Electron spin echo envelope modulation (ESEEM) experiments allowed assignment of the three species to different protonation states of the coordinated ligands. Our ESEEM analysis provides a method to distinguish the coordination of aroyl hydrazones in the keto and enolate forms, which influences both the ligand field and overall charge of the complex. As such, this type of analysis could provide valuable information in a variety of studies of iron complexes of aroyl hydrazones, ranging from the investigation of spin-crossover behavior to tracking of their distribution in biological samples.
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Affiliation(s)
- Andrei V. Astashkin
- Department of Chemistry and Biochemistry, The University of Arizona,
Tucson, AZ 85721
| | - Rachel D. Utterback
- Department of Chemistry and Biochemistry, The University of Arizona,
Tucson, AZ 85721
| | - Yu-Shien Sung
- Department of Chemistry and Biochemistry, The University of Arizona,
Tucson, AZ 85721
| | - Elisa Tomat
- Department of Chemistry and Biochemistry, The University of Arizona,
Tucson, AZ 85721
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19
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Nakanishi T, Hori Y, Wu S, Sato H, Okazawa A, Kojima N, Horie Y, Okajima H, Sakamoto A, Shiota Y, Yoshizawa K, Sato O. Three‐Step Spin State Transition and Hysteretic Proton Transfer in the Crystal of an Iron(II) Hydrazone Complex. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Takumi Nakanishi
- Institute for Materials Chemistry and Engineering & IRCCS Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Yuta Hori
- Institute for Materials Chemistry and Engineering & IRCCS Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
- Center for Computational Sciences University of Tsukuba Tsukuba 305-8577 Japan
| | - Shuqi Wu
- Institute for Materials Chemistry and Engineering & IRCCS Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Hiroyasu Sato
- Rigaku Corporation 3-9-12 Matsubaracho Akishima Tokyo 196-8666 Japan
| | - Atsushi Okazawa
- Department of Basic Science Graduation School of Arts and Sciences The University of Tokyo 3-8-1 Komaba, Meguro-ku Tokyo 153-8902 Japan
- Current address: Division of Chemistry Institution of Liberal Education Nihon University School of Medicine 30-1 Oyaguchi Uemachi Itabashi-ku Tokyo 173-8610 Japan
| | - Norimichi Kojima
- Department of Basic Science Graduation School of Arts and Sciences The University of Tokyo 3-8-1 Komaba, Meguro-ku Tokyo 153-8902 Japan
| | - Yusuke Horie
- Graduate School of Science and Engineering Aoyama Gakuin University 5-10-1 Fuchinobe, Chuo-ku Sagamihara Kanagawa 252-5258 Japan
| | - Hajime Okajima
- Graduate School of Science and Engineering Aoyama Gakuin University 5-10-1 Fuchinobe, Chuo-ku Sagamihara Kanagawa 252-5258 Japan
| | - Akira Sakamoto
- Graduate School of Science and Engineering Aoyama Gakuin University 5-10-1 Fuchinobe, Chuo-ku Sagamihara Kanagawa 252-5258 Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering & IRCCS Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering & IRCCS Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering & IRCCS Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
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20
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Zhao R, Guo J, Zhang C, Lu Y, Dagnaw WM, Wang ZX. DFT Mechanistic Insight into the Dioxygenase-like Reactivity of a Co III-peroxo Complex: O–O Bond Cleavage via a [1,3]-Sigmatropic Rearrangement-like Mechanism. Inorg Chem 2020; 59:2051-2061. [DOI: 10.1021/acs.inorgchem.9b03470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ruihua Zhao
- School of Chemical Sciences, University of Chinese Academy of Sciences, Jia #19, Yuquan Road, Beijing 100039, China
| | - Jiandong Guo
- School of Chemical Sciences, University of Chinese Academy of Sciences, Jia #19, Yuquan Road, Beijing 100039, China
| | - Chaoshen Zhang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Jia #19, Yuquan Road, Beijing 100039, China
| | - Yu Lu
- School of Chemical Sciences, University of Chinese Academy of Sciences, Jia #19, Yuquan Road, Beijing 100039, China
| | - Wasihun Menberu Dagnaw
- School of Chemical Sciences, University of Chinese Academy of Sciences, Jia #19, Yuquan Road, Beijing 100039, China
| | - Zhi-Xiang Wang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Jia #19, Yuquan Road, Beijing 100039, China
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21
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Cho HJ, Kim T, Kim H, Song C. Solid-State Emissive Metallo-Supramolecular Assemblies of Quinoline-Based Acyl Hydrazone. SENSORS (BASEL, SWITZERLAND) 2020; 20:E600. [PMID: 31973170 PMCID: PMC7037554 DOI: 10.3390/s20030600] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/16/2020] [Accepted: 01/20/2020] [Indexed: 02/07/2023]
Abstract
Development of fluorescence-based sensory materials for metal elements is currently in the mainstream of research due to the simplicity and usability of fluorescence as a method of detection. Herein, we report a novel "bis"-quinoline-based acyl hydrazone-named bQH that could be synthesized by a facile, low-cost method through simple condensation of hydrazide with an aldehyde. This acyl hydrazone showed emissive properties through Zn selective binding, especially in its solid-state, as shown by experiments such as UV-Vis, photoluminescence (PL), nuclear magnetic resonance (NMR), and inductively-coupled plasma-optical emission spectroscopies (ICP-OES), and energy-dispersive X-ray spectroscopy (EDS) mapping. The binding modes in which bQH coordinates to Zn2+ was proved to consist of two modes, 1:1 and 1:2 (bQH:Zn2+), where the binding mode was controlled by the Zn2+ ion content. Under the 1:1 binding mode, bQH-Zn2+ complexes formed a polymeric array through the metallo-supramolecular assembly. The resulting bQH-Zn2+ complex maintained its fluorescence in solid-state and exhibited excellent fluorescence intensity as compared to the previously reported quinoline-based acyl hydrazone derivative (mQH).
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Affiliation(s)
| | | | | | - Changsik Song
- Department of Chemistry, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 16419, Korea; (H.J.C.); (T.K.); (H.K.)
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22
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Li N, Xue JP, Liu JL, Wang YY, Yao ZS, Tao J. Switchable on-off spin-crossover properties of iron(ii) compounds by trimming intermolecular hydrogen bonds. Dalton Trans 2020; 49:998-1001. [PMID: 31930274 DOI: 10.1039/c9dt04685b] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Reversible single crystal-to-single crystal transformations from [FeL2(NCS)2]·3MeOH (1·3MeOH, L = 2-(anthracen-10-yl)-1H-imidazo[4,5-f][1,10]phenanthroline) to 1 and 1·2H2O were reported, which were accompanied by on-off switching of the spin-crossover properties.
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Affiliation(s)
- Na Li
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
| | - Jin-Peng Xue
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
| | - Jing-Lin Liu
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
| | - Yao-Yao Wang
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
| | - Zi-Shuo Yao
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
| | - Jun Tao
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
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