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Xu X, Gao C, Emusani R, Jia C, Xiang D. Toward Practical Single-Molecule/Atom Switches. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2400877. [PMID: 38810145 PMCID: PMC11304318 DOI: 10.1002/advs.202400877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 04/29/2024] [Indexed: 05/31/2024]
Abstract
Electronic switches have been considered to be one of the most important components of contemporary electronic circuits for processing and storing digital information. Fabricating functional devices with building blocks of atomic/molecular switches can greatly promote the minimization of the devices and meet the requirement of high integration. This review highlights key developments in the fabrication and application of molecular switching devices. This overview offers valuable insights into the switching mechanisms under various stimuli, emphasizing structural and energy state changes in the core molecules. Beyond the molecular switches, typical individual metal atomic switches are further introduced. A critical discussion of the main challenges for realizing and developing practical molecular/atomic switches is provided. These analyses and summaries will contribute to a comprehensive understanding of the switch mechanisms, providing guidance for the rational design of functional nanoswitch devices toward practical applications.
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Affiliation(s)
- Xiaona Xu
- Institute of Modern Optics and Center of Single Molecule SciencesNankai UniversityTianjin Key Laboratory of Micro‐scale Optical Information Science and TechnologyTianjin300350China
| | - Chunyan Gao
- Institute of Modern Optics and Center of Single Molecule SciencesNankai UniversityTianjin Key Laboratory of Micro‐scale Optical Information Science and TechnologyTianjin300350China
| | - Ramya Emusani
- Institute of Modern Optics and Center of Single Molecule SciencesNankai UniversityTianjin Key Laboratory of Micro‐scale Optical Information Science and TechnologyTianjin300350China
| | - Chuancheng Jia
- Institute of Modern Optics and Center of Single Molecule SciencesNankai UniversityTianjin Key Laboratory of Micro‐scale Optical Information Science and TechnologyTianjin300350China
| | - Dong Xiang
- Institute of Modern Optics and Center of Single Molecule SciencesNankai UniversityTianjin Key Laboratory of Micro‐scale Optical Information Science and TechnologyTianjin300350China
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2
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Deng W, Wu SG, Ruan ZY, Gong YP, Du SN, Wang HL, Chen YC, Zhang WX, Liu JL, Tong ML. Spin-State Control in Dysprosium(III) Metallacrown Magnets via Thioacetal Modification. Angew Chem Int Ed Engl 2024; 63:e202404271. [PMID: 38700507 DOI: 10.1002/anie.202404271] [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: 03/01/2024] [Indexed: 06/19/2024]
Abstract
Integrating controllable spin states into single-molecule magnets (SMMs) enables precise manipulation of magnetic interactions at a molecular level, but remains a synthetic challenge. Herein, we developed a 3d-4f metallacrown (MC) magnet [DyNi5(quinha)5(Clsal)2(py)8](ClO4) ⋅ 4H2O (H2quinha=quinaldichydroxamic acid, HClsal=5-chlorosalicylaldehyde) wherein a square planar NiII is stabilized by chemical stacking. Thioacetal modification was employed via post-synthetic ligand substitutions and yielded [DyNi5(quinha)5(Clsaldt)2(py)8](ClO4) ⋅ 3H2O (HClsaldt=4-chloro-2-(1,3-dithiolan-2-yl)phenol). Thanks to the additional ligations of thioacetal onto the NiII site, coordination-induced spin state switching (CISSS) took place with spin state altering from low-spin S=0 to high-spin S=1. The synergy of CISSS effect and magnetic interactions results in distinct energy splitting and magnetic dynamics. Magnetic studies indicate prominent enhancement of reversal barrier from 57 cm-1 to 423 cm-1, along with hysteresis opening and an over 200-fold increment in coercive field at 2 K. Ab initio calculations provide deeper insights into the exchange models and rationalize the relaxation/tunnelling pathways. These results demonstrate here provide a fire-new perspective in modulating the magnetization relaxation via the incorporation of controllable spin states and magnetic interactions facilitated by the CISSS approach.
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Affiliation(s)
- Wei Deng
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Si-Guo Wu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Ze-Yu Ruan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Ya-Ping Gong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Shan-Nan Du
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Hai-Ling Wang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Yan-Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Wei-Xiong Zhang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Jun-Liang Liu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
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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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Kaushik K, Mehta S, Das M, Ghosh S, Kamilya S, Mondal A. Stimuli-responsive magnetic materials: impact of spin and electronic modulation. Chem Commun (Camb) 2023; 59:13107-13124. [PMID: 37846652 DOI: 10.1039/d3cc04268e] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Addressing molecular bistability as a function of external stimuli, especially in spin-crossover (SCO) and metal-to-metal electron transfer (MMET) systems, has seen a surge of interest in the field of molecule-based magnetic materials due to their enormous potential in various technological applications such as molecular spintronics, memory and electronic devices, switches, sensors, and many more. The fine-tuning of molecular components allow the design and synthesis of materials with tailored properties for these vast applications. In this Feature Article, we discuss a part of our research work into this broad topic, pertaining to the recent discoveries in the field of switchable molecular magnetic materials based on SCO and MMET systems, along with some historical background of the area and related accomplishments made in recent years.
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Affiliation(s)
- Krishna Kaushik
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Sakshi Mehta
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Mayurika Das
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Sounak Ghosh
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Sujit Kamilya
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Abhishake Mondal
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
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Mukherjee A, Seyfried MD, Ravoo BJ. Azoheteroarene and Diazocine Molecular Photoswitches: Self-Assembly, Responsive Materials and Photopharmacology. Angew Chem Int Ed Engl 2023; 62:e202304437. [PMID: 37212536 DOI: 10.1002/anie.202304437] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/19/2023] [Accepted: 05/22/2023] [Indexed: 05/23/2023]
Abstract
Aromatic units tethered with an azo (-N=N-) functionality comprise a unique class of compounds, known as molecular photoswitches, exhibiting a reversible transformation between their E- and Z-isomers in response to photo-irradiation. Photoswitches have been explored extensively in the recent past to prepare dynamic self-assembled materials, optoelectronic devices, responsive biomaterials, and more. Most of such materials involve azobenzenes as the molecular photoswitch and to date, SciFinder lists more than 7000 articles and 1000 patents. Subsequently, a great deal of effort has been invested to improve the photo-isomerization efficiency and related mesoscopic properties of azobenzenes. Recently, azoheteroarenes and cyclic azobenzenes, such as arylazopyrazoles, arylazoisoxazoles, arylazopyridines, and diazocines, have emerged as second generation molecular photoswitches beyond conventional azobenzenes. These photoswitches offer distinct photoswitching behavior and responsive properties which make them highly promising candidates for multifaceted applications ranging from photoresponsive materials to photopharmacophores. In this minireview, we introduce the structural refinement and photoresponsive properties of azoheteroarenes and diazocines and summarize the state-of-the-art on utilizing these photoswitches as responsive building blocks in supramolecular assembly, material science and photopharmacology, highlighting their versatile photochemical behavior, enhanced functionality, and latest applications.
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Affiliation(s)
- Anurag Mukherjee
- Organisch-Chemisches Institut and Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster Corrensstraße 36, 48149, Münster, Germany
| | - Maximilian D Seyfried
- Organisch-Chemisches Institut and Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster Corrensstraße 36, 48149, Münster, Germany
| | - Bart Jan Ravoo
- Organisch-Chemisches Institut and Center for Soft Nanoscience (SoN), Westfälische Wilhelms-Universität Münster Corrensstraße 36, 48149, Münster, Germany
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Kusumoto S, Inaba K, Suda H, Nakaya M, Tokunaga R, Thuéry P, Haruki R, Kanazawa T, Nozawa S, Kim Y, Hayami S, Koide Y. Cooperative Spin-State Switching and Vapochromism of Mononuclear Ni(II) Complexes by Pyridine Coordination/Decoordination. Inorg Chem 2023; 62:16222-16227. [PMID: 37724933 DOI: 10.1021/acs.inorgchem.3c02776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Two mononuclear Ni(II) complexes (1 and 2) have been found to display color changes upon coordination/decoordination of pyridine, resulting in their structural transformation between square-planar and octahedral geometries as well as a change in their spin state. Compound 1 changes between red (1r) and yellow (1y) upon exposure to or elimination of pyridine, while 2 undergoes a two-step transformation, changing orange 2o (S = 0) ⇄ gray 2g' (S = 1) → yellow 2y' (S = 1) depending on the reaction time. The first step (2o → 2g') takes less than 45 min, which is significantly faster than the previously reported reaction time of 1 day for a Ni(II) complex/pyridine vapor system. Compound 2o reacting with pyridine can be easily prepared by dispersing 2g in methanol instead of annealing at high temperatures (130 °C), which can be applied to develop chemical sensors for pyridine utilizing color changes and/or magnetic switching.
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Affiliation(s)
- Sotaro Kusumoto
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Kazumasa Inaba
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Harutoshi Suda
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Manabu Nakaya
- Department of Chemistry, Faculty of Science, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan
| | - Ryuya Tokunaga
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Pierre Thuéry
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
| | - Rie Haruki
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Tomoki Kanazawa
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Shunsuke Nozawa
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Yang Kim
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Shinya Hayami
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
- Institute of Industrial Nanomaterials (IINa), Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Yoshihiro Koide
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
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Xu F, Feringa BL. Photoresponsive Supramolecular Polymers: From Light-Controlled Small Molecules to Smart Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2204413. [PMID: 36239270 DOI: 10.1002/adma.202204413] [Citation(s) in RCA: 58] [Impact Index Per Article: 58.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 08/18/2022] [Indexed: 06/16/2023]
Abstract
Photoresponsive supramolecular polymers are well-organized assemblies based on highly oriented and reversible noncovalent interactions containing photosensitive molecules as (co-)monomers. They have attracted increasing interest in smart materials and dynamic systems with precisely controllable functions, such as light-driven soft actuators, photoresponsive fluorescent anticounterfeiting and light-triggered electronic devices. The present review discusses light-activated molecules used in photoresponsive supramolecular polymers with their main photo-induced changes, e.g., geometry, dipole moment, and chirality. Based on these distinct changes, supramolecular polymers formed by light-activated molecules exhibit photoresponsive disassembly and reassembly. As a consequence, photo-induced supramolecular polymerization, "depolymerization," and regulation of the lengths and topologies are observed. Moreover, the light-controlled functions of supramolecular polymers, such as actuation, emission, and chirality transfer along length scales, are highlighted. Furthermore, a perspective on challenges and future opportunities is presented. Besides the challenge of moving from harmful UV light to visible/near IR light avoiding fatigue, and enabling biomedical applications, future opportunities include light-controlled supramolecular actuators with helical motion, light-modulated information transmission, optically recyclable materials, and multi-stimuli-responsive supramolecular systems.
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Affiliation(s)
- Fan Xu
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, Groningen, 9747 AG, The Netherlands
| | - Ben L Feringa
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, Groningen, 9747 AG, The Netherlands
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8
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Resines-Urien E, Fernandez-Bartolome E, Martinez-Martinez A, Gamonal A, Piñeiro-López L, Costa JS. Vapochromic effect in switchable molecular-based spin crossover compounds. Chem Soc Rev 2023; 52:705-727. [PMID: 36484276 DOI: 10.1039/d2cs00790h] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Coordination complexes based on transition metal ions displaying [Ar]3d4-3d7 electronic configurations can undergo the likely most spectacular switchable phenomena found in molecular coordination chemistry, the well-known Spin Crossover (SCO). SCO phenomena is a detectable, reproducible and reversible switch that occurs between the high spin (HS) and low spin (LS) electronic states of the transition metal actuated by different stimuli (i.e. light, temperature, pressure, the presence of an analyte). Moreover, the occurrence of SCO phenomena causes different outputs, one of them being a colour change. Altogether, an analyte in gas form could be detected by naked eye once it has triggered the corresponding HS ↔ LS transition. This vapochromic effect could be used to detect volatile molecules using a low-cost technology, including harmful chemical substances, gases and/or volatile organic compounds (VOCs) that are present in our environment, in our home or at our workplace. The present review condenses all reported iron coordination compounds where the colour change induced by a given molecule in its gas form is coupled to a HS ↔ LS spin transition. Special emphasis has been made on describing the nature of the post-synthetic modification (PSM) taking place in the material upon the analyte uptake. In this case, three types of PSM can be distinguished: based on supramolecular contacts and/or leading to a coordinative or covalent bond. In the latter, a colour change not only indicates the switch of the spin state in the material but also the formation of a new compound with different properties. It is important to indicate that some of the SCO coordination compounds discussed in the current report have been part of other spin crossover reviews, that have gathered thermally induced SCO compounds and the influence of guest molecules on the SCO behaviour. However, in the majority of examples in these reviews, the change of colour upon the uptake of analytes is not associated with a spin transition at room temperature. In addition, the observed colour variations have been mainly discussed in terms of host-guest interactions, when they can also be induced by a PSM taking place in different sites of the molecule, like the Fe(II) coordination sphere or by chemically altering its inorganic and/or organic linkers. Therefore, we present here for the first time an exhaustive compilation of all systems in which the interaction between the coordination compounds and the vapour analytes leads to a colour change due to a spin transition in the metal centre at room temperature.
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Lemon CM, Maher AG, Anderson BL, Bloch ED, Huynh M, McCollar AL, Nocera DG. Solvent-Induced Spin-State Change in Copper Corroles. Inorg Chem 2022; 61:20288-20298. [DOI: 10.1021/acs.inorgchem.2c02678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- Christopher M. Lemon
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts02138, United States
- Department of Chemistry & Biochemistry, Montana State University, P.O. Box 173400, Bozeman, Montana59717, United States
| | - Andrew G. Maher
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts02138, United States
| | - Bryce L. Anderson
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts02138, United States
| | - Eric D. Bloch
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts02138, United States
| | - Michael Huynh
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts02138, United States
| | - Abie L. McCollar
- Department of Chemistry & Biochemistry, Montana State University, P.O. Box 173400, Bozeman, Montana59717, United States
| | - Daniel G. Nocera
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts02138, United States
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Dhiman A, Paras, Ramachandran C. Opto-electronic properties of isomers of azobispyridine. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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11
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Al Shehimy S, Baydoun O, Denis-Quanquin S, Mulatier JC, Khrouz L, Frath D, Dumont É, Murugesu M, Chevallier F, Bucher C. Ni-Centered Coordination-Induced Spin-State Switching Triggered by Electrical Stimulation. J Am Chem Soc 2022; 144:17955-17965. [PMID: 36154166 DOI: 10.1021/jacs.2c07196] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We herein report the synthesis and magnetic properties of a Ni(II)-porphyrin tethered to an imidazole ligand through a flexible electron-responsive mechanical hinge. The latter is capable of undergoing a large amplitude and fully reversible folding motion under the effect of electrical stimulation. This redox-triggered movement is exploited to force the axial coordination of the appended imidazole ligand onto the square-planar Ni(II) center, resulting in a change in its spin state from low spin (S = 0) to high spin (S = 1) proceeding with an 80% switching efficiency. The driving force of this reversible folding motion is the π-dimerization between two electrogenerated viologen cation radicals. The folding motion and the associated spin state switching are demonstrated on the grounds of NMR, (spectro)electrochemical, and magnetic data supported by quantum calculations.
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Affiliation(s)
- Shaymaa Al Shehimy
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69342 Lyon, France
| | - Orsola Baydoun
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69342 Lyon, France
| | | | | | - Lhoussain Khrouz
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69342 Lyon, France
| | - Denis Frath
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69342 Lyon, France
| | - Élise Dumont
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69342 Lyon, France.,Institut Universitaire de France, 5 rue Descartes, 75005 Paris, France
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Floris Chevallier
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69342 Lyon, France
| | - Christophe Bucher
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69342 Lyon, France
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Fischer K, Krahmer J, Tuczek F. Chemically and Light-Driven Coordination-Induced Spin State Switching (CISSS) of a nonheme-iron complex. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2022. [DOI: 10.1515/znb-2022-0011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The new Fe(II) complex [Fe(trident)(bmik)](ClO4)2 (1) (trident = bis(2-pyridylmethyl)benzylamine and bmik = bis(1-methylimidazole)ketone) exhibits a change of magnetic moment in dichloromethane (DCM) solution upon addition of pyridine which is attributed to the Coordination-Induced Spin State Switching effect (CISSS). By attaching a photoisomerizable azopyridine sidegroup to the tridentate ligand the complex [Fe(azpy-trident)(bmik)](ClO4)2 (2; azpy-trident = [N,N-bis(2-pyridylmethyl)]-3-(3-pyridylazo)benzylamine) is obtained. As detected by Evans NMR spectroscopy, 2 reversibly changes its magnetic moment in homogeneous solution upon photoirradiation which is attributed to intermolecular Light-Driven Coordination-Induced Spin State Switching (LD-CISSS). Further support for this interpretation is inferred from concentration-dependent Evans NMR measurements.
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Affiliation(s)
- Kim Fischer
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , Max-Eyth-Straße 2, D-24118 Kiel , Germany
| | - Jan Krahmer
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , Max-Eyth-Straße 2, D-24118 Kiel , Germany
| | - Felix Tuczek
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel , Max-Eyth-Straße 2, D-24118 Kiel , Germany
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13
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Kurz H, Hörner G, Weser O, Li Manni G, Weber B. Quenched Lewis Acidity: Studies on the Medium Dependent Fluorescence of Zinc(II) Complexes. Chemistry 2021; 27:15158-15170. [PMID: 34431572 PMCID: PMC8596774 DOI: 10.1002/chem.202102086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Indexed: 01/04/2023]
Abstract
Three new zinc(II) coordination units [Zn(1-3)] based on planar-directing tetradentate Schiff base-like ligands H2 (1-3) were synthesized. Their solid-state structures were investigated by single crystal X-ray diffraction, showing the tendency to overcome the square-planar coordination sphere by axial ligation. Affinity in solution towards axial ligation has been tested by extended spectroscopic studies, both in the absorption and emission mode. The electronic spectrum of the pyridine complex [Zn(1)(py)] has been characterized by MC-PDFT to validate the results of extended TD-DFT studies. Green emission of non-emissive solutions of [Zn(1-3)] in chloroform could be switched on in the presence of potent Lewis-bases. While interpretation in terms of an equilibrium of stacked/non-fluorescent and destacked/fluorescent species is in line with precedents from literature, the sensitivity of [Zn(1-3)] was greatly reduced. Results of a computation-based structure search allow to trace the hidden Lewis acidity of [Zn(1-3)] to a new stacking motif, resulting in a strongly enhanced stability of the dimers.
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Affiliation(s)
- Hannah Kurz
- Inorganic Chemistry IVUniversity of BayreuthUniversitätsstraße 3095447BayreuthGermany
| | - Gerald Hörner
- Inorganic Chemistry IVUniversity of BayreuthUniversitätsstraße 3095447BayreuthGermany
| | - Oskar Weser
- Max Planck Institute for Solid State ResearchHeisenbergstraße 170569StuttgartGermany
| | - Giovanni Li Manni
- Max Planck Institute for Solid State ResearchHeisenbergstraße 170569StuttgartGermany
| | - Birgit Weber
- Inorganic Chemistry IVUniversity of BayreuthUniversitätsstraße 3095447BayreuthGermany
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14
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Jia JG, Zhao CC, Bao SS, Wu LQ, Wen GH, Jacobson AJ, Ma J, Zheng LM. Layer or Tube? Uncovering Key Factors Determining the Rolling-up of Layered Coordination Polymers. J Am Chem Soc 2021; 143:17587-17598. [PMID: 34644503 DOI: 10.1021/jacs.1c07517] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Nanotubular materials have garnered considerable attention since the discovery of carbon nanotubes. Although the layer-to-tube rolling up mechanism has been well recognized in explaining the formation of many inorganic nanotubes, it has not been generally applied to coordination polymers (CPs). To uncover the key factors that determine the rolling-up of layered CPs, we have chosen the Co/R-, S-Xpemp [Xpemp = (4-X-1-phenylethylamino)methylphosphonic acid, X = H, F, Cl, Br] systems and study how the weak interactions influence the formation of layered or tubular structures. Four pairs of homochiral isostructural compounds R-, S-Co(Xpemp)(H2O)2 [X = H (1H), F (2F), Cl (3Cl), Br (4Br)] were obtained with tubular structures. The inclusion of 3,3'-azobipyridine (ABP) guest molecules led to compounds R-, S-[Co(Xpemp)(H2O)2]4·ABP·H2O with layered structures when X was Cl (5Cl) and Br (6Br), but tubular compounds 1H and 2F when X was H and F. Layered structures were also obtained for racemic compounds meso-Co(Xpemp)(H2O)2 [X = F (7F), Cl (8Cl), Br (9Br)] using racemic XpempH2 as the reaction precursor, but not when X = H. A detailed study on R-6Br revealed that layer-to-tube transformation occurred upon removal of ABP under hydrothermal conditions, forming R-4Br with a tubular structure. Similar layer-to-tube conversion did not occur in organic solvents. The results demonstrate that weak interlayer interactions are a prerequisite but not sufficient for the rolling-up of the layers. In the present cases, water also provides a driving force in the layer-to-tube transformation. The experimental results were rationalized by theoretical calculations.
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Affiliation(s)
- Jia-Ge Jia
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People's Republic of China
| | - Chen-Chen Zhao
- Theoretical and Computational Chemistry Institute, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
| | - Song-Song Bao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People's Republic of China
| | - Lan-Qing Wu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People's Republic of China
| | - Ge-Hua Wen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People's Republic of China
| | - Allan J Jacobson
- Department of Chemistry and Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, United States
| | - Jing Ma
- Theoretical and Computational Chemistry Institute, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
| | - Li-Min Zheng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People's Republic of China
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15
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Livesay BN, Shores MP. Influence of Coordinated Triflate Anions on the Solution Magnetic Properties of a Neutral Iron(II) Complex. Inorg Chem 2021; 60:15445-15455. [PMID: 34596394 DOI: 10.1021/acs.inorgchem.1c02112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In an effort to probe the impacts of speciation on spin-state switching, the synthesis and unique solution-phase magnetic properties of [((TIPSC≡C)3tren)Fe(OTf)2] (1) are described. Analysis of the single-crystal X-ray diffraction data shows that the tris(iminoalkyne) ligand coordinates to the iron(II) center through all four nitrogen atoms, while the other two coordination sites are filled by the oxygen atoms from triflate anions. Solid-state variable-temperature (VT) magnetic studies show that 1 remains high-spin (HS) at all temperatures. In the presence of moderately strong coordinating solvents, solvent replaces the two bound triflate counteranions, as observed by 19F NMR spectroscopy and supported by conductivity measurements. VT solution measurements show 1 to be in the HS state when this solvent is oxygen-donating but low-spin (LS) with a nitrogen-donating solvent. In the noncoordinating solvent dichloromethane, both triflates are bound to the iron(II) center at room temperature, but upon cooling, 1 undergoes a coordination change, resulting in the loss of one triflate, as shown by 19F NMR. With the moderately coordinating solvent acetone, triflate dissociation upon cooling results in a spin-switching species with a T1/2 value of 171 K, characterized via 19F NMR, Evans' method, and solution magnetometry measurements. Solution magnetic measurements collected in structurally similar cyclopentanone suggest that the spin-state switching event is exclusive to the acetone environment, suggesting the influence of both the local coordination environment and aggregation. Additionally, a comparison of the solvodoynamic diameters via dynamic light scattering suggests that aggregation of 1 is significantly different in (CH3)2CO and (CD3)2CO, leading to the observation of spin-switching behavior in the former and fully HS behavior in the latter. This study highlights the sensitivity of solution magnetic properties to solvent choice.
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Affiliation(s)
- Brooke N Livesay
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Matthew P Shores
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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16
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Nakamura K, Kondo M, Krishnan CG, Takizawa S, Sasai H. Azopyridine-based chiral oxazolines with rare-earth metals for photoswitchable catalysis. Chem Commun (Camb) 2021; 57:7414-7417. [PMID: 34231579 DOI: 10.1039/d1cc02602j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An azopyridine-based oxazoline was developed for utilizing azo group coordination and isomerization as a photoswitchable ligand. The ligand coordinated to rare-earth metal (RE) catalyst underwent efficient E/Z photoisomerization, suggesting tri- and bidentate coordination switching. The photoisomerization of the ligand enabled modulation of the enantioselectivity of an RE-catalyzed aminal forming reaction.
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Affiliation(s)
- Kento Nakamura
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
| | - Masaru Kondo
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan. and Department of Materials Science and Engineering, Graduate School of Science and Engineering, Ibaraki University, Hitachi 316-8511, Ibaraki, Japan
| | - Chandu G Krishnan
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
| | - Shinobu Takizawa
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
| | - Hiroaki Sasai
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
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17
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Shokurov AV, Kutsybala DS, Kroitor AP, Dmitrienko AA, Martynov AG, Enakieva YY, Tsivadze AY, Selektor SL, Gorbunova YG. Spin Crossover in Nickel(II) Tetraphenylporphyrinate via Forced Axial Coordination at the Air/Water Interface. Molecules 2021; 26:molecules26144155. [PMID: 34299430 PMCID: PMC8305922 DOI: 10.3390/molecules26144155] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 07/03/2021] [Accepted: 07/05/2021] [Indexed: 11/24/2022] Open
Abstract
Coordination-induced spin crossover (CISCO) in nickel(II) porphyrinates is an intriguing phenomenon that is interesting from both fundamental and practical standpoints. However, in most cases, realization of this effect requires extensive synthetic protocols or extreme concentrations of extra-ligands. Herein we show that CISCO effect can be prompted for the commonly available nickel(II) tetraphenylporphyrinate, NiTPP, upon deposition of this complex at the air/water interface together with a ruthenium(II) phthalocyaninate, CRPcRu(pyz)2, bearing two axial pyrazine ligands. The latter was used as a molecular guiderail to align Ni···Ru···Ni metal centers for pyrazine coordination upon lateral compression of the system, which helps bring the two macrocycles closer together and forces the formation of Ni–pyz bonds. The fact of Ni(II) porphyrinate switching from low- to high-spin state upon acquiring additional ligands can be conveniently observed in situ via reflection-absorption UV-vis spectroscopy. The reversible nature of this interaction allows for dissociation of Ni–pyz bonds, and thus, change of nickel cation spin state, upon expansion of the monolayer.
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Affiliation(s)
- Alexander V. Shokurov
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31-4, 119071 Moscow, Russia; (D.S.K.); (A.P.K.); (A.G.M.); (Y.Y.E.); (A.Y.T.); (S.L.S.)
- Correspondence: (A.V.S.); (Y.G.G.)
| | - Daria S. Kutsybala
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31-4, 119071 Moscow, Russia; (D.S.K.); (A.P.K.); (A.G.M.); (Y.Y.E.); (A.Y.T.); (S.L.S.)
| | - Andrey P. Kroitor
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31-4, 119071 Moscow, Russia; (D.S.K.); (A.P.K.); (A.G.M.); (Y.Y.E.); (A.Y.T.); (S.L.S.)
| | - Alexander A. Dmitrienko
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia;
| | - Alexander G. Martynov
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31-4, 119071 Moscow, Russia; (D.S.K.); (A.P.K.); (A.G.M.); (Y.Y.E.); (A.Y.T.); (S.L.S.)
| | - Yulia Yu. Enakieva
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31-4, 119071 Moscow, Russia; (D.S.K.); (A.P.K.); (A.G.M.); (Y.Y.E.); (A.Y.T.); (S.L.S.)
| | - Aslan Yu. Tsivadze
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31-4, 119071 Moscow, Russia; (D.S.K.); (A.P.K.); (A.G.M.); (Y.Y.E.); (A.Y.T.); (S.L.S.)
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky pr. 31, 119991 Moscow, Russia
| | - Sofiya L. Selektor
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31-4, 119071 Moscow, Russia; (D.S.K.); (A.P.K.); (A.G.M.); (Y.Y.E.); (A.Y.T.); (S.L.S.)
| | - Yulia G. Gorbunova
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31-4, 119071 Moscow, Russia; (D.S.K.); (A.P.K.); (A.G.M.); (Y.Y.E.); (A.Y.T.); (S.L.S.)
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky pr. 31, 119991 Moscow, Russia
- Correspondence: (A.V.S.); (Y.G.G.)
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18
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Fürpaß KM, Peschel LM, Schachner JA, Borisov SM, Krenn H, Belaj F, Mösch‐Zanetti NC. Vapochromism and Magnetochemical Switching of a Nickel(II) Paddlewheel Complex by Reversible NH 3 Uptake and Release. Angew Chem Int Ed Engl 2021; 60:13401-13404. [PMID: 33773004 PMCID: PMC8251872 DOI: 10.1002/anie.202102149] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Indexed: 12/30/2022]
Abstract
Reaction of [NiCl2 (PnH)4 ] (1) (PnH=6-tert-butyl-pyridazine-3-thione) with NiCl2 affords the binuclear paddlewheel (PW) complex [Ni2 (Pn)4 ] (2). Diamagnetic complex 2 is the first example of a PW complex capable of reversibly binding and releasing NH3 . The NH3 ligand in [Ni2 (Pn)4 (NH3 )] (2⋅NH3 ) enforces major spectroscopic and magnetic susceptibility changes, thus displaying vapochromic properties (λmax (2)=532 nm, λmax (2⋅NH3 )=518 nm) and magnetochemical switching (2: S=0; 2⋅NH3 : S=1). Upon repeated adsorption/desorption cycles of NH3 the PW core remains intact. Compound 2 can be embedded into thin polyurethane films (2P ) under retention of its sensing abilities. Therefore, 2 qualifies as reversible optical probe for ammonia. The magnetochemical switching of 2 and 2⋅NH3 was studied in detail by SQUID measurements showing that in 2⋅NH3 , solely the Ni atom coordinated the NH3 molecule is responsible for the paramagnetic behavior.
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Affiliation(s)
| | - Lydia M. Peschel
- Institute of ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Jörg A. Schachner
- Institute of ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Sergey M. Borisov
- Institute of Analytical Chemistry and Food ChemistryGraz University of TechnologyStremayrgasse 98010GrazAustria
| | - Heinz Krenn
- Institute of PhysicsUniversity of GrazUniversitätsplatz 58010GrazAustria
| | - Ferdinand Belaj
- Institute of ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
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19
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Fürpaß KM, Peschel LM, Schachner JA, Borisov SM, Krenn H, Belaj F, Mösch‐Zanetti NC. Vapochromism and Magnetochemical Switching of a Nickel(II) Paddlewheel Complex by Reversible NH
3
Uptake and Release. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Katharina M. Fürpaß
- Institute of Chemistry University of Graz Schubertstrasse 1 8010 Graz Austria
| | - Lydia M. Peschel
- Institute of Chemistry University of Graz Schubertstrasse 1 8010 Graz Austria
| | - Jörg A. Schachner
- Institute of Chemistry University of Graz Schubertstrasse 1 8010 Graz Austria
| | - Sergey M. Borisov
- Institute of Analytical Chemistry and Food Chemistry Graz University of Technology Stremayrgasse 9 8010 Graz Austria
| | - Heinz Krenn
- Institute of Physics University of Graz Universitätsplatz 5 8010 Graz Austria
| | - Ferdinand Belaj
- Institute of Chemistry University of Graz Schubertstrasse 1 8010 Graz Austria
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20
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Hazra A, Bonakala S, Adalikwu SA, Balasubramanian S, Maji TK. Fluorocarbon-Functionalized Superhydrophobic Metal-Organic Framework: Enhanced CO 2 Uptake via Photoinduced Postsynthetic Modification. Inorg Chem 2021; 60:3823-3833. [PMID: 33655749 DOI: 10.1021/acs.inorgchem.0c03575] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The design and synthesis of porous materials for selective capture of CO2 in the presence of water vapor is of paramount importance in the context of practical separation of CO2 from the flue gas stream. Here, we report the synthesis and structural characterization of a photoresponsive fluorinated MOF {[Cd(bpee)(hfbba)]·EtOH}n (1) constructed by using 4,4'-(hexafluoroisopropylidene)bis(benzoic acid) (hfbba), Cd(NO3)2, and 1,2-bis(4-pyridyl)ethylene (bpee) as building units. Due to the presence of the fluoroalkyl -CF3 functionality, compound 1 exhibits superhydrophobicity, which is validated by both water vapor adsorption and contact angle measurements (152°). The parallel arrangement of the bpee linkers makes compound 1 a photoresponsive material that transforms to {[Cd2(rctt-tpcb)(hfbba)2]·2EtOH}n (rctt-tpcb = regio cis,trans,trans-tetrakis(4-pyridyl)cyclobutane; 1IR) after a [2 + 2] cycloaddition reaction. The photomodified framework 1IR exhibits increased uptake of CO2 in comparison to 1 under ambient conditions due to alteration of the pore surface that leads to additional weak electron donor-acceptor interactions with the -CF3 groups, as examined through periodic density functional theory calculations. The enhanced uptake is also aided by an expansion of the pore window, which contributes to increasing the rotational entropy of CO2, as demonstrated through force field based free energy calculations.
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Affiliation(s)
- Arpan Hazra
- Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560064 (India)
| | - Satyanarayana Bonakala
- Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560064 (India)
| | - Stephen Adie Adalikwu
- Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560064 (India)
| | - Sundaram Balasubramanian
- Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560064 (India)
| | - Tapas Kumar Maji
- Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560064 (India)
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21
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Kurz H, Schötz K, Papadopoulos I, Heinemann FW, Maid H, Guldi DM, Köhler A, Hörner G, Weber B. A Fluorescence-Detected Coordination-Induced Spin State Switch. J Am Chem Soc 2021; 143:3466-3480. [PMID: 33636077 DOI: 10.1021/jacs.0c12568] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The response of the spin state to in situ variation of the coordination number (CISSS) is a promising and viable approach to smart sensor materials, yet it suffers to date from insensitive detection. Herein, we present the synthetic access to a family of planar nickel(II) complexes, whose CISSS is sensitively followed by means of fluorescence detection. For this purpose, nickel(II) complexes with four phenazine-based Schiff base-like ligands were synthesized and characterized through solution-phase spectroscopy (NMR and UV-vis), solid-state structure analysis (single-crystal XRD), and extended theoretical modeling. All of them reveal CISSS in solution through axial ligating a range of N- and O-donors. CISSS correlates nicely with the basicity of the axial ligand and the substitution-dependent acidity of the nickel(II) coordination site. Remarkably, three out of the four nickel(II) complexes are fluorescent in noncoordinating solvents but are fluorescence-silent in the presence of axial ligands such as pyridine. As these complexes are rare examples of fluorescent nickel(II) complexes, the photophysical properties with a coordination number of 4 were studied in detail, including temperature-dependent lifetime and quantum yield determinations. Most importantly, fluorescence quenching upon adding axial ligands allows a "black or white", i.e. digital, sensoring of spin state alternation. Our studies of fluorescence-detected CISSS (FD-CISSS) revealed that absorption-based CISSS and FD-CISSS are super proportional with respect to the pyridine concentration: FD-CISSS features a higher sensitivity. Overall, our findings indicate a favored ligation of these nickel(II) complexes in the excited state in comparison to the ground state.
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Affiliation(s)
- Hannah Kurz
- Inorganic Chemistry IV, University of Bayreuth, Universitätsstraße 30, NW I, 95447 Bayreuth, Germany
| | - Konstantin Schötz
- Soft Matter Optoelectronics, University of Bayreuth, Universitätsstraße 30, NW I, 95447 Bayreuth, Germany
| | - Ilias Papadopoulos
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM), Physical Chemistry I, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Egerlandstraße 3, 91058 Erlangen, Germany
| | - Frank W Heinemann
- Inorganic Chemistry, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany
| | - Harald Maid
- Organic Chemistry II, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Dirk M Guldi
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM), Physical Chemistry I, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Egerlandstraße 3, 91058 Erlangen, Germany
| | - Anna Köhler
- Soft Matter Optoelectronics, University of Bayreuth, Universitätsstraße 30, NW I, 95447 Bayreuth, Germany.,Bayreuth Institute of Macromolecular Research (BIMF) and Bavarian Polymer Institute (BPI), University of Bayreuth, Universitätsstraße 30, NW I, 95447 Bayreuth, Germany
| | - Gerald Hörner
- Inorganic Chemistry IV, University of Bayreuth, Universitätsstraße 30, NW I, 95447 Bayreuth, Germany
| | - Birgit Weber
- Inorganic Chemistry IV, University of Bayreuth, Universitätsstraße 30, NW I, 95447 Bayreuth, Germany
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22
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Weinstain R, Slanina T, Kand D, Klán P. Visible-to-NIR-Light Activated Release: From Small Molecules to Nanomaterials. Chem Rev 2020; 120:13135-13272. [PMID: 33125209 PMCID: PMC7833475 DOI: 10.1021/acs.chemrev.0c00663] [Citation(s) in RCA: 271] [Impact Index Per Article: 67.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Indexed: 02/08/2023]
Abstract
Photoactivatable (alternatively, photoremovable, photoreleasable, or photocleavable) protecting groups (PPGs), also known as caged or photocaged compounds, are used to enable non-invasive spatiotemporal photochemical control over the release of species of interest. Recent years have seen the development of PPGs activatable by biologically and chemically benign visible and near-infrared (NIR) light. These long-wavelength-absorbing moieties expand the applicability of this powerful method and its accessibility to non-specialist users. This review comprehensively covers organic and transition metal-containing photoactivatable compounds (complexes) that absorb in the visible- and NIR-range to release various leaving groups and gasotransmitters (carbon monoxide, nitric oxide, and hydrogen sulfide). The text also covers visible- and NIR-light-induced photosensitized release using molecular sensitizers, quantum dots, and upconversion and second-harmonic nanoparticles, as well as release via photodynamic (photooxygenation by singlet oxygen) and photothermal effects. Release from photoactivatable polymers, micelles, vesicles, and photoswitches, along with the related emerging field of photopharmacology, is discussed at the end of the review.
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Affiliation(s)
- Roy Weinstain
- School
of Plant Sciences and Food Security, Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv 6997801, Israel
| | - Tomáš Slanina
- Institute
of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Dnyaneshwar Kand
- School
of Plant Sciences and Food Security, Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv 6997801, Israel
| | - Petr Klán
- Department
of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
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23
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Qamar OA, Cong C, Ma H. Solid state mononuclear divalent nickel spin crossover complexes. Dalton Trans 2020; 49:17106-17114. [PMID: 33205805 DOI: 10.1039/d0dt03421e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spin crossover complexes containing 3d4-3d7 transition metal ions with tunable electronic configurations in appropriate ligand field environments have been extensively investigated. In contrast, the development of 3d8 divalent nickel complexes displaying such a spin crossover behavior is far behind. The increasing number of X-ray single crystal structures along with magnetic evidence and thermodynamic equilibrium indicate that bistable divalent nickel complexes are gradually recognized to be a formal member of the "spin crossover family". Unfortunately, the rarity of nickel spin crossover complexes is occasionally mentioned. This Perspective article highlights examples of mononuclear 3d8 nickel spin crossover complexes in dynamic rearrangements with characterized solid state structures from the viewpoint of types of ligands utilized.
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Affiliation(s)
- Obaid Ali Qamar
- Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing 21186, China.
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24
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Xie D, Yu M, Xie Z, Kadakia RT, Chung C, Ohman LE, Javanmardi K, Que EL. Versatile Nickel(II) Scaffolds as Coordination‐Induced Spin‐State Switches for
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F Magnetic Resonance‐Based Detection. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010587] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Da Xie
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Meng Yu
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Zhu‐Lin Xie
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Rahul T. Kadakia
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Chris Chung
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Lauren E. Ohman
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Kamyab Javanmardi
- Department of Molecular Biosciences The University of Texas at Austin 2500 Speedway Austin TX 78712 USA
| | - Emily L. Que
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
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25
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Xie D, Yu M, Xie ZL, Kadakia RT, Chung C, Ohman LE, Javanmardi K, Que EL. Versatile Nickel(II) Scaffolds as Coordination-Induced Spin-State Switches for 19 F Magnetic Resonance-Based Detection. Angew Chem Int Ed Engl 2020; 59:22523-22530. [PMID: 32790890 DOI: 10.1002/anie.202010587] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Indexed: 12/15/2022]
Abstract
19 F magnetic resonance (MR) based detection coupled with well-designed inorganic systems shows promise in biological investigations. Two proof-of-concept inorganic probes that exploit a novel mechanism for 19 F MR sensing based on converting from low-spin (S=0) to high-spin (S=1) Ni2+ are reported. Activation of diamagnetic NiL1 and NiL2 by light or β-galactosidase, respectively, converts them into paramagnetic NiL0 , which displays a single 19 F NMR peak shifted by >35 ppm with accelerated relaxation rates. This spin-state switch is effective for sensing light or enzyme expression in live cells using 19 F MR spectroscopy and imaging that differentiate signals based on chemical shift and relaxation times. This general inorganic scaffold has potential for developing agents that can sense analytes ranging from ions to enzymes, opening up diverse possibilities for 19 F MR based biosensing.
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Affiliation(s)
- Da Xie
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Meng Yu
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Zhu-Lin Xie
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Rahul T Kadakia
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Chris Chung
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Lauren E Ohman
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Kamyab Javanmardi
- Department of Molecular Biosciences, The University of Texas at Austin, 2500 Speedway, Austin, TX, 78712, USA
| | - Emily L Que
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
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26
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Amati M, Baerends EJ, Ricciardi G, Rosa A. Origin of the Enhanced Binding Capability toward Axial Nitrogen Bases of Ni(II) Porphyrins Bearing Electron-Withdrawing Substituents: An Electronic Structure and Bond Energy Analysis. Inorg Chem 2020; 59:11528-11541. [PMID: 32799514 DOI: 10.1021/acs.inorgchem.0c01327] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Axial coordination to metalloporphyrins is important in many biological and catalytic processes. Experiments found the axial coordination of nitrogenous bases to nickel(II) porphyrins to be strongly favored by electron-withdrawing substituents such as perfluorophenyls at the meso carbon positions. Careful analysis of the electronic structure reveals that the natural explanation in terms of density change of the nickel(II) porphyrin system (in particular the metal), does not apply. Electron density changes, by the assumed inductive or polarizing effects on the metal or on the porphyrin ring system, are slight. The effect is caused by a remarkable through-space electric field effect on the metalloporphyrin system, originating from the charge distribution inside the perfluorphenyl groups (mostly the C-F dipoles).
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Affiliation(s)
- Mario Amati
- Università della Basilicata, Dipartimento di Scienze, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Evert Jan Baerends
- VU University Amsterdam, Theoretical Chemistry, FEW, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Giampaolo Ricciardi
- Università della Basilicata, Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali (SAFE), Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Angela Rosa
- Università della Basilicata, Dipartimento di Scienze, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy
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27
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Su SQ, Wu SQ, Baker ML, Bencok P, Azuma N, Miyazaki Y, Nakano M, Kang S, Shiota Y, Yoshizawa K, Kanegawa S, Sato O. Quenching and Restoration of Orbital Angular Momentum through a Dynamic Bond in a Cobalt(II) Complex. J Am Chem Soc 2020; 142:11434-11441. [DOI: 10.1021/jacs.0c02257] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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
| | - Michael L. Baker
- The University of Manchester at Harwell, Didcot, OX11 OFA, United Kingdom
- Department of Chemistry, The University of Manchester, Manchester M139PL, United Kingdom
| | - Peter Bencok
- Diamond Light Source, Science Division, Didcot OX11 0DE, United Kingdom
| | - Nobuaki Azuma
- Research Core for Interdisciplinary Science, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Yuji Miyazaki
- Research Center for Thermal and Entropic Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Motohiro Nakano
- Research Center for Thermal and Entropic Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Soonchul Kang
- Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, 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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28
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Kennedy ADW, Sandler I, Andréasson J, Ho J, Beves JE. Visible‐Light Photoswitching by Azobenzazoles. Chemistry 2020; 26:1103-1110. [DOI: 10.1002/chem.201904309] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Indexed: 11/09/2022]
Affiliation(s)
| | - Isolde Sandler
- School of Chemistry UNSW Sydney Sydney NSW 2052 Australia
| | - Joakim Andréasson
- Department of Chemistry and Chemical Engineering Chalmers University of Technology 412 96 Göteborg Sweden
| | - Junming Ho
- School of Chemistry UNSW Sydney Sydney NSW 2052 Australia
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Ludwig J, Gröbner J, Dommaschk M, Huber LM, Peters MK, Hövener JB, Herges R. Ni(II)porphyrins as pH dependent light-driven coordination-induced spin-state switches (LD-CISSS) in aqueous solution. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424619501803] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A water-soluble Ni(II)-porphyrin substituted with a covalently attached azopyridine ligand was synthesized. Upon irradiation with violet and green light, the azo unit performs a reversible cis–trans isomerization. This geometry change triggers a coordination/de-coordination of the pyridine nitrogen at the central nickel(II) ion. The concomitant change in coordination number at the Ni ion in turn switches the spin state between high and low spin, a process we coined a “light-driven coordination-induced spin state switch (LD-CISSS). To increase the coordination power of the pyridine, particularly in aqueous environments, we introduced an electron donating OH group in 4-position. With increasing pH, the hydroxyl group is deprotonated, further enforcing coordination. We report on the properties of this pH-dependent spin switch, particularly the magnetic properties.
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Affiliation(s)
- Jannis Ludwig
- Otto Diels Institute of Organic Chemistry, University of Kiel, Otto-Hahn-Platz 3-4, Kiel D-24098, Germany
| | - Jens Gröbner
- Otto Diels Institute of Organic Chemistry, University of Kiel, Otto-Hahn-Platz 3-4, Kiel D-24098, Germany
| | - Marcel Dommaschk
- Otto Diels Institute of Organic Chemistry, University of Kiel, Otto-Hahn-Platz 3-4, Kiel D-24098, Germany
| | - Lukas M. Huber
- Molecular Imaging North Competence Center, University of Kiel, Am Botanischen Garten 14, Kiel D-24098, Germany
| | - Morten K. Peters
- Otto Diels Institute of Organic Chemistry, University of Kiel, Otto-Hahn-Platz 3-4, Kiel D-24098, Germany
| | - Jan-Bernd Hövener
- Molecular Imaging North Competence Center, University of Kiel, Am Botanischen Garten 14, Kiel D-24098, Germany
| | - Rainer Herges
- Otto Diels Institute of Organic Chemistry, University of Kiel, Otto-Hahn-Platz 3-4, Kiel D-24098, Germany
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30
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Abstract
Photoswitchable catalysis using organometallic complexes: a ligand design perspective.
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Affiliation(s)
- Zoraida Freixa
- Department of Applied Chemistry
- University of the Basque Country (UPV-EHU)
- San Sebastián
- Spain
- IKERBASQUE
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Yagi A, Kondo T, Yamashita D, Wachi N, Omori H, Fukui N, Ikeue T, Shinokubo H. 5,5,15,15-Tetraoxo-5,15-Dithiaporphyrin as a Highly Electron-Deficient Porphyrinic Ligand. Chemistry 2019; 25:15580-15585. [PMID: 31550386 DOI: 10.1002/chem.201903639] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/16/2019] [Indexed: 01/08/2023]
Abstract
Oxidation of 5,15-dithiaporphyrin with meta-chloroperbenzoic acid afforded the corresponding S,S-tetraoxide in good yield. The resultant 5,5,15,15-tetraoxo-5,15-dithiaporphyrin exhibited the highly electron-deficient nature as elucidated by the electrochemical analysis and theoretical calculations. Treatment of tetraoxodithiaporphyrin with zinc(II) acetate and nickel(II) acetate provided the corresponding metal complexes efficiently. Owing to its enhanced Lewis acidity of the metal center by the electron-deficient ligand, the nickel complex underwent facile axial ligation to form pentacoordinate and hexacoordinate high-spin (S=1) complexes in solution and solid, respectively. The binding constant of pyridine to the NiII center was significantly higher than those of conventional porphyrin NiII complexes. Temperature-dependent magnetic susceptibility measurements of the high-spin NiII complex revealed the presence of weak ferromagnetic interactions.
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Affiliation(s)
- Atsumi Yagi
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Takeshi Kondo
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Daisuke Yamashita
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Naruhiko Wachi
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Hiroto Omori
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Norihito Fukui
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Takahisa Ikeue
- Department of Chemistry, Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue, 690-8540, Japan
| | - Hiroshi Shinokubo
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
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32
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Goswami A, Saha S, Biswas PK, Schmittel M. (Nano)mechanical Motion Triggered by Metal Coordination: from Functional Devices to Networked Multicomponent Catalytic Machinery. Chem Rev 2019; 120:125-199. [DOI: 10.1021/acs.chemrev.9b00159] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Abir Goswami
- Center of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Strase 2, D-57068 Siegen, Germany
| | - Suchismita Saha
- Center of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Strase 2, D-57068 Siegen, Germany
| | - Pronay Kumar Biswas
- Center of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Strase 2, D-57068 Siegen, Germany
| | - Michael Schmittel
- Center of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Strase 2, D-57068 Siegen, Germany
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33
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Kumar R, Ravi C, Joshi A, Semwal R, Adimurthy S. Catalyst‐free Azo‐arylation of Arenes/Heteroarenes at Room Temperature. ChemistrySelect 2019. [DOI: 10.1002/slct.201901308] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Rahul Kumar
- Natural Products and Green Chemistry DivisionAcademy of Scientific & Innovative ResearchCSIR–Central Salt & Marine Chemicals Research Institute, G.B. Marg Bhavnagar- 364 002. Gujarat INDIA
| | - Chitrakar Ravi
- Natural Products and Green Chemistry DivisionAcademy of Scientific & Innovative ResearchCSIR–Central Salt & Marine Chemicals Research Institute, G.B. Marg Bhavnagar- 364 002. Gujarat INDIA
| | - Abhisek Joshi
- Natural Products and Green Chemistry DivisionAcademy of Scientific & Innovative ResearchCSIR–Central Salt & Marine Chemicals Research Institute, G.B. Marg Bhavnagar- 364 002. Gujarat INDIA
| | - Rashmi Semwal
- Natural Products and Green Chemistry DivisionAcademy of Scientific & Innovative ResearchCSIR–Central Salt & Marine Chemicals Research Institute, G.B. Marg Bhavnagar- 364 002. Gujarat INDIA
| | - Subbarayappa Adimurthy
- Natural Products and Green Chemistry DivisionAcademy of Scientific & Innovative ResearchCSIR–Central Salt & Marine Chemicals Research Institute, G.B. Marg Bhavnagar- 364 002. Gujarat INDIA
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34
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Li F, Huang J, Wang J, Li Q. Spin-Transport Tuning of Individual Magnetic Mn-Salophen Molecule via Chemical Adsorption. Molecules 2019; 24:E1747. [PMID: 31064070 PMCID: PMC6539303 DOI: 10.3390/molecules24091747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 04/22/2019] [Accepted: 04/30/2019] [Indexed: 11/16/2022] Open
Abstract
Control over spin states at the single molecule level is a key issue in the emerging field of molecular spintronics. Here, we explore the chemical adsorption effect on the magnetic and spin-transport properties of individual magnetic molecule by performing extensive density functional theory calculations in combining with non-equilibrium Green's function method. Theoretical results clearly reveal that the molecular magnetic moment of Mn-salophen can be effectively tuned by adsorbing F and CO on the central Mn cation, while the adsorbed NO molecule quenches the molecular magnetic moment. Without chemical adsorption, the currents through Mn-salophen molecular junction just show a little distinction for two spin channels, which agrees well with previous investigation. Remarkably, the conductive channel can be switched from the spin-up electrons to the spin-down electrons via adsorbing F and CO, respectively, and the corresponding two Mn-salophen molecular junctions with chemical modifications display nearly perfect spin-filtering effect. The observed spin switch and the predicted spin-filtering effect via chemical adsorption indicates that Mn-salophen holds potential applications in molecular spintronic devices.
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Affiliation(s)
- Feifei Li
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, Anhui, China.
| | - Jing Huang
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, Anhui, China.
| | - Jianing Wang
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, Anhui, China.
| | - Qunxiang Li
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, Anhui, China.
- Hefei National Laboratory for Physical Sciences at the Microscale & Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, Anhui, China.
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35
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Peters MK, Hamer S, Jäkel T, Röhricht F, Sönnichsen FD, von Essen C, Lahtinen M, Naether C, Rissanen K, Herges R. Spin Switching with Triazolate-Strapped Ferrous Porphyrins. Inorg Chem 2019; 58:5265-5272. [DOI: 10.1021/acs.inorgchem.9b00349] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Morten K. Peters
- Otto-Diels-Institut für Organische Chemie, Christian Albrechts-Universität, Otto-Hahn-Platz 4, 24098 Kiel, Germany
| | - Sebastian Hamer
- Otto-Diels-Institut für Organische Chemie, Christian Albrechts-Universität, Otto-Hahn-Platz 4, 24098 Kiel, Germany
| | - Torben Jäkel
- Otto-Diels-Institut für Organische Chemie, Christian Albrechts-Universität, Otto-Hahn-Platz 4, 24098 Kiel, Germany
| | - Fynn Röhricht
- Otto-Diels-Institut für Organische Chemie, Christian Albrechts-Universität, Otto-Hahn-Platz 4, 24098 Kiel, Germany
| | - Frank D. Sönnichsen
- Otto-Diels-Institut für Organische Chemie, Christian Albrechts-Universität, Otto-Hahn-Platz 4, 24098 Kiel, Germany
| | - Carolina von Essen
- University of Jyvaskyla, Department of Chemistry, P.O. Box 35, 40014 Jyväskylä, Finland
| | - Manu Lahtinen
- University of Jyvaskyla, Department of Chemistry, P.O. Box 35, 40014 Jyväskylä, Finland
| | - Christian Naether
- Anorganische Chemie, Christian-Albrechts-Universität, Max-Eyth-Strasse 2, 24118 Kiel, Germany
| | - Kari Rissanen
- University of Jyvaskyla, Department of Chemistry, P.O. Box 35, 40014 Jyväskylä, Finland
| | - Rainer Herges
- Otto-Diels-Institut für Organische Chemie, Christian Albrechts-Universität, Otto-Hahn-Platz 4, 24098 Kiel, Germany
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36
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Gutzeit F, Dommaschk M, Levin N, Buchholz A, Schaub E, Plass W, Näther C, Herges R. Structure and Properties of a Five-Coordinate Nickel(II) Porphyrin. Inorg Chem 2019; 58:12542-12546. [PMID: 30925048 DOI: 10.1021/acs.inorgchem.9b00348] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Axial coordination in nickel(II) porphyrins has been thoroughly investigated and is well understood. However, isolated five-coordinate nickel(II) porphyrins are still elusive after 50 years of intense research, even though they play a crucial role as intermediates in enzymes and catalysts. Herein we present the first fully stable, thoroughly characterized five-coordinate nickel(II) porphyrin in solution and in the solid state (crystal structure). The spectroscopic properties indicate pure high-spin behavior (S = 1). There are distinct differences in the NMR, UV-vis, and redox behavior compared to those of high-spin six-coordinate [with two axial ligands, such as NiTPPF10·(py)2] and low-spin four-coordinate (NiTPPF10) nickel(II) porphyrins. The title compound, a strapped nickel(II) porphyrin, allows a direct comparison of four-, five-, and six-coordinate nickel(II) porphyrins, depending on the environment. With this reference in hand, previous results were reevaluated, for example, the switching efficiencies and thermodynamic data of nickel(II) porphyrin-based spin switches in solution.
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Affiliation(s)
| | | | - Natalia Levin
- Max Planck Institute for Chemical Energy Conversion , Stiftstrasse 34-36 , 45470 Mülheim an der Ruhr , Germany
| | - Axel Buchholz
- Institute of Inorganic and Analytical Chemistry , Friedrich Schiller University Jena , Humboldtstrasse 8 , 07743 Jena , Germany
| | | | - Winfried Plass
- Institute of Inorganic and Analytical Chemistry , Friedrich Schiller University Jena , Humboldtstrasse 8 , 07743 Jena , Germany
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37
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38
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Chastanet G, Lorenc M, Bertoni R, Desplanches C. Light-induced spin crossover—Solution and solid-state processes. CR CHIM 2018. [DOI: 10.1016/j.crci.2018.02.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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39
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40
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Light-controlled switching of the spin state of iron(III). Nat Commun 2018; 9:4750. [PMID: 30420598 PMCID: PMC6232099 DOI: 10.1038/s41467-018-07023-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 10/08/2018] [Indexed: 11/17/2022] Open
Abstract
Controlled switching of the spin state of transition metal ions, particularly of FeII and FeIII, is a prerequisite to achieve selectivity, efficiency, and catalysis in a number of metalloenzymes. Here we report on an iron(III) porphyrin with a photochromic axial ligand which, upon irradiation with two different wavelengths reversibly switches its spin state between low-spin (S = 1/2) and high-spin (S = 5/2) in solution (DMSO-acetone, 2:598). The switching efficiency is 76% at room temperature. The system is neither oxygen nor water sensitive, and no fatigue was observed after more than 1000 switching cycles. Concomitant with the spin-flip is a change in redox potential by ~60 mV. Besides serving as a simple model for the first step of the cytochrome P450 catalytic cycle, the spin switch can be used to switch the spin-lattice relaxation time T1 of the water protons by a factor of 15. Controlled switching of the spin state of transition metal ions is key in many enzymatic reactions, but difficult to replicate in synthetic systems. Here the authors report on an iron(III) porphyrin with a photochromic axial ligand that, in solution, reversibly switches between low-spin and high-spin upon irradiation with two different wavelengths.
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41
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Paquette MM, Plaul D, Kurimoto A, Patrick BO, Frank NL. Opto-Spintronics: Photoisomerization-Induced Spin State Switching at 300 K in Photochrome Cobalt-Dioxolene Thin Films. J Am Chem Soc 2018; 140:14990-15000. [PMID: 30351017 DOI: 10.1021/jacs.8b09190] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Controllable quantum systems are under active investigation for quantum computing, secure information processing, and nonvolatile memory. The optical manipulation of spin quantum states provides an important strategy for quantum control with both temporal and spatial resolution. Challenges in increasing the lifetime of photoinduced magnetic states at T > 200 K have hindered progress toward utilizing photomagnetic materials in quantum device architectures. Here we demonstrate reversible light-induced magnetization switching in an organic thin film at device operating temperatures of 300-330 K. By utilizing photochromic ligands that undergo structural changes in the solid state, the changes in ligand field associated with photoisomerization modulate the ligand field and in turn the oxidation and spin state of a bound metal center. Green light irradiation (λexc = 550 nm) of a spirooxazine cobalt-dioxolene complex induces photoisomerization of the ligand that in turn triggers a reversible intramolecular charge-transfer coupled spin-transition process at the cobalt center. The generation of photomagnetic states through conversion between a low-spin Co(III)-semiquinone doublet and a high-spin Co(II)-bis-semiquinone sextet state has been demonstrated in both solution and the solid state and is described as a photoisomerization-induced spin-charge excited state (PISCES) process. The high transition temperature (325 K) and long-lived photoinduced state (τ = 10 s at 300 K) are dictated by the photochromic ligand. Theory provides effective modeling of the phenomenon and long-term strategies to further modulate the lifetimes of photomagnetic states for quantum information technologies at the single molecule level.
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Affiliation(s)
- Michelle M Paquette
- Department of Chemistry , University of Victoria , PO Box 1700 STN CSC , Victoria , British Columbia V8W 2Y2 , Canada
| | - Daniel Plaul
- Department of Chemistry , University of Victoria , PO Box 1700 STN CSC , Victoria , British Columbia V8W 2Y2 , Canada
| | - Aiko Kurimoto
- Department of Chemistry , University of Victoria , PO Box 1700 STN CSC , Victoria , British Columbia V8W 2Y2 , Canada
| | - Brian O Patrick
- Department of Chemistry , University of British Columbia , Vancouver , British Columbia V6T 1Z1 , Canada
| | - Natia L Frank
- Department of Chemistry , University of Victoria , PO Box 1700 STN CSC , Victoria , British Columbia V8W 2Y2 , Canada
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Chand S, Hota S, Elahi SM, Das MC. Three isostructural azo-functionalized 3D Cd(II)-coordination polymers for solvent dependent photoluminescence study. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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43
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Towards Ni(II) complexes with spin switches for 19F MR-based pH sensing. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2018; 32:89-96. [DOI: 10.1007/s10334-018-0698-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/23/2018] [Accepted: 08/02/2018] [Indexed: 01/09/2023]
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44
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Peters MK, Näther C, Herges R. Crystal structure of 2-[2-(pyridin-3-yl)diazen-1-yl]aniline. Acta Crystallogr E Crystallogr Commun 2018; 74:1013-1016. [PMID: 30002906 PMCID: PMC6038623 DOI: 10.1107/s2056989018008605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 06/12/2018] [Indexed: 11/10/2022]
Abstract
The crystal structure of the title compound, C11H10N4, comprises mol-ecules in a trans conformation for which all the atoms are located in general positions. The six-membered rings are coplanar and this arrangement might be stabilized by intra-molecular N-H⋯N hydrogen bonding. In the crystal, the mol-ecules are linked into helical chains parallel to the b axis via N-H⋯N hydrogen bonding. The mol-ecular packing shows a herringbone-like pattern along the a axis. Comparison of the X-ray powder diffraction with that calculated from single crystal data proves that a pure crystalline phase was obtained and UV-Vis measurements reveal that only the trans isomer is present.
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Affiliation(s)
- Morten K. Peters
- Otto-Diels-Institut für Anorganische Chemie, Christian-Albrechts-Universität Kiel, Otto-Hahn-Platz 4, D-24098 Kiel, Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Christian-Albrechts-Universität Kiel, Max-Eyth Str. 2, D-24118 Kiel, Germany
| | - Rainer Herges
- Otto-Diels-Institut für Anorganische Chemie, Christian-Albrechts-Universität Kiel, Otto-Hahn-Platz 4, D-24098 Kiel, Germany
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45
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Chand S, Pal A, Pal SC, Das MC. A Trifunctional Luminescent 3D Microporous MOF with Potential for CO2
Separation, Selective Sensing of a Metal Ion, and Recognition of a Small Organic Molecule. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800336] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Santanu Chand
- Department of chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur WB India
| | - Arun Pal
- Department of chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur WB India
| | - Shyam Chand Pal
- Department of chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur WB India
| | - Madhab C. Das
- Department of chemistry; Indian Institute of Technology Kharagpur; 721302 Kharagpur WB India
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46
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Zhang J, Han S, Liu X, Wu Z, Ji C, Sun Z, Luo J. A lead-free perovskite-like hybrid with above-room-temperature switching of quadratic nonlinear optical properties. Chem Commun (Camb) 2018; 54:5614-5617. [PMID: 29770371 DOI: 10.1039/c8cc02496k] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a new lead-free perovskite-like hybrid, composed of hexamethyleneimine and one-dimensional [SbCl5]n2- polyanionic zigzag chains, which shows above-room-temperature switching of quadratic nonlinear optical (NLO) properties induced by the unique order-disorder conformational changes of the organic cation.
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Affiliation(s)
- Jing Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China.
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47
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Chand S, Pal A, Das MC. A Moisture-Stable 3D Microporous CoII
-Metal-Organic Framework with Potential for Highly Selective CO2
Separation under Ambient Conditions. Chemistry 2018; 24:5982-5986. [DOI: 10.1002/chem.201800693] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Santanu Chand
- Department of Chemistry; Indian Institute of Technology Kharagpur, WB; 721302 India
| | - Arun Pal
- Department of Chemistry; Indian Institute of Technology Kharagpur, WB; 721302 India
| | - Madhab C. Das
- Department of Chemistry; Indian Institute of Technology Kharagpur, WB; 721302 India
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48
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Tong YB, Tian ZF, Duan HB, Zhu ZP, He W, Hong TY, Yu G, He YJ, Yang JK. [(18-Crown-6)K][Fe(1)Cl(1) 4 ] 0.5 [Fe(2)Cl(2) 4 ] 0.5 : A Multifunctional Molecular Switch of Dielectric, Conductivity and Magnetic Properties. Chem Asian J 2018; 13:656-663. [PMID: 29356387 DOI: 10.1002/asia.201701794] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 01/17/2018] [Indexed: 11/07/2022]
Abstract
Multifunctional materials that exhibit different physical properties in a single phase have potential for use in multifunctional devices. Herein, we reported an organic-inorganic hybrid compound [(18-crown-6)K][Fe(1)Cl(1)4 ]0.5 [Fe(2)Cl(2)4 ]0.5 (1) by incorporating KCl and FeCl3 into a 18-crown-6 molecule, which acts as a host of the six O atoms providing a lone pair of electrons to anchor the guest potassium cation, and [FeCl4 ]- as a counterion for charge balance to construct a complex salt. This salt exhibited a one-step reversible structural transformation giving two separate high and low temperature phases at 373 K, which was confirmed by systematic characterizations including differential scanning calorimetry (DSC) measurements, variable-temperature structural analyses, and dielectric, impedance, variable-temperature magnetic susceptibility measurements. Interestingly, the structural transformation was coupled to both hysteretic dielectric phase transition, conductivity switch and magnetic-phase transition at 373 K. This result gives an idea for designing a new type of phase-transition materials harboring technologically important magnetic, conductivity and dielectric properties.
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Affiliation(s)
- Yuan-Bo Tong
- School of Chemical Sciences, University of Chinese Academy of Sciences., Beijing, 100049, P. R. China
| | - Zheng-Fang Tian
- Hubei Key Laboratory for Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang, Hu Bei Province, 438000, P. R. China
| | - Hai-Bao Duan
- School of Environmental Science, Nanjing Xiaozhuang University, Nanjing, 211171, P. R. China
| | - Zhong-Peng Zhu
- School of Chemical Sciences, University of Chinese Academy of Sciences., Beijing, 100049, P. R. China
| | - Wei He
- School of Chemical Sciences, University of Chinese Academy of Sciences., Beijing, 100049, P. R. China
| | - Tian-Yu Hong
- School of Chemical Sciences, University of Chinese Academy of Sciences., Beijing, 100049, P. R. China
| | - Gui Yu
- Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, P. R. China
| | - Yu-Jian He
- School of Chemical Sciences, University of Chinese Academy of Sciences., Beijing, 100049, P. R. China
| | - Jing-Kui Yang
- School of Chemical Sciences, University of Chinese Academy of Sciences., Beijing, 100049, P. R. China
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49
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Sasano Y, Yasuda N, Maeda H. Deprotonated meso-hydroxyporphyrin as a stable π-electronic anion: the building unit of an ion-pairing assembly. Dalton Trans 2018; 46:8924-8928. [PMID: 28534579 DOI: 10.1039/c7dt01635b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The NiII complex of 5-hydroxy-10,15,20-tris(pentafluorophenyl)-porphyrin was synthesized as the precursor of a negatively charged π-electronic system. Deprotonation, which was examined through UV/vis and 1H NMR spectra, provided an anionic species as the building unit of an ion-pairing assembly in combination with an aliphatic cation.
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Affiliation(s)
- Yoshifumi Sasano
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan.
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50
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Brandenburg H, Krahmer J, Fischer K, Schwager B, Flöser B, Näther C, Tuczek F. Coordination-Induced Spin-State Switching with Nickel(II) salpn Complexes: Electronic versus Steric Effects and Influence of Intermolecular Interactions. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701281] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hannah Brandenburg
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Jan Krahmer
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Kim Fischer
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Bettina Schwager
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Benedikt Flöser
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Christian Näther
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Felix Tuczek
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
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