1
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Jo M, Amanyazova B, Yergeshbayeva S, Gakiya-Teruya M, Üngör Ö, Lopez Rivera P, Jen N, Lukyanenko E, Kurkin AV, Erkasov R, Meisel MW, Hauser A, Chakraborty P, Shatruk M. Light-induced spin-state switching in Fe(II) spin-crossover complexes with thiazole-based chelating ligands. Dalton Trans 2024; 53:10511-10520. [PMID: 38841884 DOI: 10.1039/d4dt00308j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Homoleptic complexes [Fe(4bt)3](ClO4)2 (1), [Fe(2bt)3](ClO4)2 (2), and [Fe(3tpH)3](ClO4)2 (3) were obtained by a reaction between the Fe(II) precursor salt and the corresponding thiazole-based bidentate ligand (L = 4bt = 4,4'-bithiazole, 2bt = 2,2'-bithiazole, 3tpH = 3-(thiazol-2-yl)pyrazole). X-ray crystal structure determination revealed crystallization of solvent-free complex 1, a solvate 2·MeOH, and a co-crystal 3·2(3tpH). The crystal packing of all these complexes is dominated by one-dimensional interactions between the [Fe(L)3]2+ cations. These interactions are stronger in 2·MeOH and 3·2(3tpH), leading to cooperative and slightly hysteretic transitions between the high-spin and low-spin electronic configurations at ∼235 K and 159 K, respectively. In contrast, weaker intermolecular interactions in 1 result in a gradual spin crossover above 300 K, with the maximum fraction of the HS state ∼25% achieved at 400 K. Complexes 2 and 3·2(3tpH) exhibit light-induced excited spin state trapping (LIESST) under irradiation with white light or a 532 nm laser at 5 K. After the photoexcitation, the trapped metastable HS state relaxes to the ground LS state with the average relaxation temperature of 81 K and 68 K, respectively. Examination of the relaxation dynamics by optical absorption spectroscopy on a single crystal of 3·2(3tpH) revealed the sigmoidal shape of the relaxation curves at lower temperatures, attributed to cooperative effects, as well as a plateau at ∼10% of the HS fraction at intermediate temperatures, hinting at a more complex mechanism for the relaxation of the LIESST phase in this material.
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Affiliation(s)
- Minyoung Jo
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA.
| | - Botagoz Amanyazova
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA.
- Department of Chemistry, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan
| | - Sandugash Yergeshbayeva
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA.
| | - Miguel Gakiya-Teruya
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA.
| | - Ökten Üngör
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA.
| | - Paola Lopez Rivera
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA.
- Department of Chemistry, University of Puerto Rico at Humacao, Humacao, PR 00792, Puerto Rico
| | - Natalie Jen
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA.
| | - Evgeny Lukyanenko
- Department of Chemistry, Lomonosov Moscow State University, Moscow, 119234, Russia
| | - Alexander V Kurkin
- Department of Chemistry, Lomonosov Moscow State University, Moscow, 119234, Russia
| | - Rakhmetulla Erkasov
- Department of Chemistry, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan
| | - Mark W Meisel
- Department of Physics and National High Magnetic Field Laboratory, University of Florida, Gainesville, Florida 32611, USA
| | - Andreas Hauser
- Department of Physical Chemistry, University of Geneva, CH-1211, Geneva 4, Switzerland
| | - Pradip Chakraborty
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, India.
| | - Michael Shatruk
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA.
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2
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Sun YC, Chen FL, Wang KJ, Zhao Y, Wei HY, Wang XY. Hysteretic Spin Crossover with High Transition Temperatures in Two Cobalt(II) Complexes. Inorg Chem 2023; 62:14863-14872. [PMID: 37676750 DOI: 10.1021/acs.inorgchem.3c01188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
Cooperative spin crossover transitions with thermal hysteresis loops are rarely observed in cobalt(II) complexes. Herein, two new mononuclear cobalt(II) complexes with hysteretic spin crossover at relatively high temperatures (from 320 to 400 K), namely, [Co(terpy-CH2OH)2]·X2 (terpy-CH2OH = 4'-(hydroxymethyl)-2,2';6',2″-terpyridine, X = SCN-(1) and SeCN- (2)), have been synthesized and characterized structurally and magnetically. Both compounds are mononuclear CoII complexes with two chelating terpy-CH2OH ligands. Magnetic measurements revealed the existence of the hysteretic SCO transitions for both complexes. For compound 1, a one-step transition with T1/2↑= 334.5 K was observed upon heating, while a two-step transition is observed upon cooling with T1/2↓(1) = 329.3 K and T1/2↓(2) = 324.1 K (at a temperature sweep rate of 5 K/min). As for compound 2, a hysteresis loop with a width of 5 K (T1/2↓ = 391.6 K and T1/2↑ = 396.6 K, at a sweep rate of 5 K/min) can be observed. Thanks to the absence of the crystallized lattice solvents, their single crystals are stable enough at high temperatures for the structure determination at both spin states, which reveals that the hysteretic SCO transitions in both complexes originate from the crystallographic phase transitions involving a thermally induced order-disorder transition of the dangling -CH2OH groups in the ligand. This work shows that the modification of the terpy ligand has an important effect on the magnetic properties of the resulting cobalt(II) complexes.
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Affiliation(s)
- Yu-Chen Sun
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Feng-Li Chen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Kang-Jie Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Hai-Yan Wei
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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3
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Cyclic [Cu-biRadical]2 Secondary Building Unit in 2p-3d and 2p-3d-4f Complexes: Crystal Structure and Magnetic Properties. Molecules 2023; 28:molecules28062514. [PMID: 36985497 PMCID: PMC10058193 DOI: 10.3390/molecules28062514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/07/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
Employing the new nitronyl nitroxide biradical ligand biNIT-3Py-5-Ph (2-(5-phenyl-3-pyridyl)-bis(4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide)), a 16-spin Cu-radical complex, [Cu8(biNIT-3Py-5-Ph)4(hfac)16] 1, and three 2p-3d-4f chain complexes, {[Ln(hfac)3][Cu(hfac)2]2(biNIT-3Py-5-Ph)2}n (LnⅢ= Gd 2, Tb 3, Dy 4; hfac = hexafluoroacetylacetonate), have been prepared and characterized. X-ray crystallographic analysis revealed in all derivatives a common cyclic [Cu-biNIT]2 secondary building unit in which two bi-NIT-3Py-5-Ph biradical ligands and two CuII ions are associated via the pyridine N atoms and NO units. For complex 1, two such units assemble with four additional CuII ions to form a discrete complex involving 16 S = 1/2 spin centers. For complexes 2–4, the [Cu-biNIT]2 units are linked by LnIII ions via NO groups in a 1D coordination polymer. Magnetic studies show that the coordination of the aminoxyl groups with Cu or Ln ions results in behaviors combining ferromagnetic and antiferromagnetic interactions. No slow magnetic relaxation behavior was observed for Tb and Dy derivatives.
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4
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Birchall LT, Truccolo G, Jackson L, Shepherd HJ. Co-crystallisation as a modular approach to the discovery of spin-crossover materials. Chem Sci 2022; 13:3176-3186. [PMID: 35414871 PMCID: PMC8926199 DOI: 10.1039/d1sc04956a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 02/16/2022] [Indexed: 11/21/2022] Open
Abstract
Herein we present co-crystallisation as a strategy for materials discovery in the field of switchable spin crossover (SCO) systems. Using [Fe(3-bpp)2]·2A (where 3-bpp = 2,6-bis(pyrazol-3-yl)pyridine, A = BF4 -/PF6 -) as a starting point, a total of 11 new cocrystals have been synthesised with five different dipyridyl coformers. Eight of these systems show spin crossover behaviour, and all show dramatically different switching properties from the parent complex. The cocrystals have been studied by variable temperature single-crystal X-ray diffraction and SQUID magnetometry to develop structure-property relationships. The supramolecular architecture of the cocrystals depends on the properties of the coformer. With linear, rigid coformer molecules leading to 1D supramolecular hydrogen-bonded chains, while flexible coformers form 2D sheets and bent coformers yield 3D network structures. The SCO behaviour of the cocrystals can be modified through changing the coformer and thus co-crystallisation presents a rapid, facile and highly modular tool for the discovery of new switchable materials. The wider applicability of this strategy to the design of hybrid multifunctional materials is also discussed.
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Affiliation(s)
- Lee T Birchall
- School of Physical Sciences, University of Kent Canterbury UK
| | - Giada Truccolo
- School of Physical Sciences, University of Kent Canterbury UK
| | - Lewis Jackson
- School of Physical Sciences, University of Kent Canterbury UK
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Tavallali H, Deilamy-Rad G, Parhami A, Zebarjadi R, Najafi-Nejad A, Mosallanejad N. A novel design of multiple ligands for ultrasensitive colorimetric chemosensor of glutathione in plasma sample. Anal Biochem 2022; 637:114475. [PMID: 34813770 DOI: 10.1016/j.ab.2021.114475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 09/30/2021] [Accepted: 11/12/2021] [Indexed: 01/25/2023]
Abstract
In this study, we developed a novel colorimetric chemosensor for selective and sensitive recognition of Glutathione (GSH) using a simple binary mixture of commercially accessible and inexpensive metal receptors with names, Bromo Pyrogallol Red (BPR) and Xylenol Orange (XO). This procedure is based on the synergistic coordination of BPR and XO with cerium ion (Ce3+) for the recognition of GSH over other available competitive amino acids (AAs) especially thiol species in aqueous media. Generally, cysteine (Cys) and homocysteine (hCys) can seriously interfere with the detection of GSH among common biological species because they possess similar chemical behavior. Using all the information from 1HNMR and FT-IR studies, the proposed interaction is presented in which GSH acts as a tri-dentate ligand with three N donor atoms in conjunction with BPR and XO as mono and bi-dentate ligands respectively. This approach opens a path for selective detection of other AAs by argumentatively selecting the ensemble of mixed organic ligands from commercially available reagents, thereby eliminating the need for developing synthetic receptors, sample preparation, organic solvent mixtures, and expensive equipment. Evaluating the feasibility of the existing method was led to the determination of GSH in human plasma samples.
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Affiliation(s)
- Hossein Tavallali
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Islamic Republic of Iran.
| | - Gohar Deilamy-Rad
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Islamic Republic of Iran
| | - Abolftah Parhami
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Islamic Republic of Iran
| | - Reza Zebarjadi
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Islamic Republic of Iran
| | - Arshida Najafi-Nejad
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Islamic Republic of Iran
| | - Narges Mosallanejad
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Islamic Republic of Iran
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6
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Zhang SY, Sun HY, Wang RG, Meng YS, Liu T, Zhu YY. Construction of spin-crossover dinuclear cobalt(II) compounds based on complementary terpyridine ligand pairing. Dalton Trans 2022; 51:9888-9893. [DOI: 10.1039/d2dt00436d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The self-assembly of multinuclear SCO complexes is appealing in which unique properties may be discovered due to the enhanced intramolecular and intermolecular interactions. In this work,.three dinuclear cobalt(II) complexes, named...
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7
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Flynn C, Zhou Z, McCormack ME, Wei Z, Petrukhina MA, Kertesz M. Bonding and uneven charge distribution in infinite pyrene π-stacks. CrystEngComm 2022. [DOI: 10.1039/d2ce00933a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unusual intermolecular π-stacking in a new charge transfer salt of pyrene (Py), (Py)2+(Ga2Cl7)−, has been observed.
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Affiliation(s)
- Chase Flynn
- Chemistry Department and Institute of Soft Matter, Georgetown University, 37th and O Streets, NW, Washington DC 20057-1227, USA
| | - Zheng Zhou
- Department of Chemistry, University at Albany, State University of New York, 1400 Washington Avenue, Albany, NY 12222, USA
- School of Materials Science and Engineering, Tongji University, 4800 Cao'an Road, Shanghai 201804, China
| | - Megan E. McCormack
- Department of Chemistry, University at Albany, State University of New York, 1400 Washington Avenue, Albany, NY 12222, USA
| | - Zheng Wei
- Department of Chemistry, University at Albany, State University of New York, 1400 Washington Avenue, Albany, NY 12222, USA
| | - Marina A. Petrukhina
- Department of Chemistry, University at Albany, State University of New York, 1400 Washington Avenue, Albany, NY 12222, USA
| | - Miklos Kertesz
- Chemistry Department and Institute of Soft Matter, Georgetown University, 37th and O Streets, NW, Washington DC 20057-1227, USA
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8
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Üngör Ö, Choi ES, Shatruk M. Solvent‐Dependent Spin‐Crossover Behavior in Semiconducting Co–Crystals of [Fe(1‐bpp)
2
]
2+
Cations and TCNQ
δ−
Anions (0<δ<1). Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100707] [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)
- Ökten Üngör
- Department of Chemistry and Biochemistry Florida State University 95 Chieftan Way Tallahassee FL 32306 USA
- Department of Chemistry Colorado State University 301 W. Pitkin St Fort Collins CO 80523 USA
| | - Eun Sang Choi
- National High Magnetic Field Laboratory 1800 E Paul Dirac Dr Tallahassee FL 32310 USA
| | - Michael Shatruk
- Department of Chemistry and Biochemistry Florida State University 95 Chieftan Way Tallahassee FL 32306 USA
- National High Magnetic Field Laboratory 1800 E Paul Dirac Dr Tallahassee FL 32310 USA
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9
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Guo Z, You M, Deng YF, Liu Q, Meng YS, Pikramenou Z, Zhang YZ. An azido-bridged [FeII4] grid-like molecule showing spin crossover behaviour. Dalton Trans 2021; 50:14303-14308. [PMID: 34554167 DOI: 10.1039/d1dt01908b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The supramolecular self-assembly synthetic strategy provides a valid tool to obtain polynuclear Fe(II) complexes having effective communication between the metal centres and distinct spin crossover behaviour. Despite the great success in constructing various magnetic molecules, progress has not been made in SCO complexes based on azido bridges. In this article, the coordination-driven supramolecular assembly based on 3,6-substituted pyridazine and azide is presented to afford two Fe(II) grid-like complexes: [(L)4FeII4(N3)4][BPh4]4·sol (1, L = 3,6-bis(3,5-dimethyl-1H-pyrazol-1-yl)pyridazine and 2, L = 3,6-di(pyridin-2-yl)pyridazine). The substitution of pyridinyl groups in 2 instead of pyrazolyl ones in 1 led to the only example exhibiting spin-crossover behaviour (T1/2 = 230 K) among the azido-bridged complexes. In addition, a temperature-dependent photoluminescence study of 2 demonstrates a visible synergetic effect between the SCO event and the luminescence.
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Affiliation(s)
- Zhilin Guo
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China. .,School of Chemistry, The University of Birmingham, Edgbaston B15 2TT, UK.
| | - Maolin You
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China. .,Department of Chemistry, National University of Singapore, Science Drive 3, Singapore 117543
| | - Yi-Fei Deng
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China.
| | - Qiang Liu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd, Dalian 116024, P. R. China
| | - Yin-Shan Meng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd, Dalian 116024, P. R. China
| | - Zoe Pikramenou
- School of Chemistry, The University of Birmingham, Edgbaston B15 2TT, UK.
| | - Yuan-Zhu Zhang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China.
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10
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Üngör Ö, Choi ES, Shatruk M. Optimization of crystal packing in semiconducting spin-crossover materials with fractionally charged TCNQ δ- anions (0 < δ < 1). Chem Sci 2021; 12:10765-10779. [PMID: 34476058 PMCID: PMC8372557 DOI: 10.1039/d1sc02843j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/02/2021] [Indexed: 11/21/2022] Open
Abstract
Co-crystallization of the prominent Fe(ii) spin-crossover (SCO) cation, [Fe(3-bpp)2]2+ (3-bpp = 2,6-bis(pyrazol-3-yl)pyridine), with a fractionally charged TCNQ δ- radical anion has afforded a hybrid complex [Fe(3-bpp)2](TCNQ)3·5MeCN (1·5MeCN, where δ = -0.67). The partially desolvated material shows semiconducting behavior, with the room temperature conductivity σ RT = 3.1 × 10-3 S cm-1, and weak modulation of conducting properties in the region of the spin transition. The complete desolvation, however, results in the loss of hysteretic behavior and a very gradual SCO that spans the temperature range of 200 K. A related complex with integer-charged TCNQ- anions, [Fe(3-bpp)2](TCNQ)2·3MeCN (2·3MeCN), readily loses the interstitial solvent to afford desolvated complex 2 that undergoes an abrupt and hysteretic spin transition centered at 106 K, with an 11 K thermal hysteresis. Complex 2 also exhibits a temperature-induced excited spin-state trapping (TIESST) effect, upon which a metastable high-spin state is trapped by flash-cooling from room temperature to 10 K. Heating above 85 K restores the ground-state low-spin configuration. An approach to improve the structural stability of such complexes is demonstrated by using a related ligand 2,6-bis(benzimidazol-2'-yl)pyridine (bzimpy) to obtain [Fe(bzimpy)2](TCNQ)6·2Me2CO (4) and [Fe(bzimpy)2](TCNQ)5·5MeCN (5), both of which exist as LS complexes up to 400 K and exhibit semiconducting behavior, with σ RT = 9.1 × 10-2 S cm-1 and 1.8 × 10-3 S cm-1, respectively.
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Affiliation(s)
- Ökten Üngör
- Department of Chemistry and Biochemistry, Florida State University 95 Chieftan Way Tallahassee FL 32306 USA
| | - Eun Sang Choi
- National High Magnetic Field Laboratory 1800 E Paul Dirac Dr Tallahassee FL 32310 USA
| | - Michael Shatruk
- Department of Chemistry and Biochemistry, Florida State University 95 Chieftan Way Tallahassee FL 32306 USA
- National High Magnetic Field Laboratory 1800 E Paul Dirac Dr Tallahassee FL 32310 USA
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11
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Üngör Ö, Burrows M, Liu T, Bodensteiner M, Adhikari Y, Hua Z, Casas B, Balicas L, Xiong P, Shatruk M. Paramagnetic Molecular Semiconductors Combining Anisotropic Magnetic Ions with TCNQ Radical Anions. Inorg Chem 2021; 60:10502-10512. [PMID: 34191491 DOI: 10.1021/acs.inorgchem.1c01140] [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
We report the synthesis, magnetic properties, and transport properties of paramagnetic metal complexes, [Co(DMF)4(TCNQ)2](TCNQ)2 (1), [La(DMF)8(TCNQ)](TCNQ)5 (2), and [Nd(DMF)7(TCNQ)](TCNQ)5 (3) (DMF = N,N-dimethylformamide, TCNQ = 7,7,8,8-tetracyanoquinodimethane). All three compounds contain fractionally charged TCNQδ- anions (0 < δ < 1) and mononuclear complex cations in which the coordination environment of a metal center includes several DMF molecules and one or two terminally coordinated TCNQδ- anions. The coordinated TCNQδ- anions participate in π-π stacking interactions with noncoordinated TCNQδ- anions, forming columnar substructures that provide efficient charge-transporting pathways. As a result, temperature-dependent conductivity measurements demonstrate that all three compounds exhibit semiconducting behavior.
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Affiliation(s)
- Ökten Üngör
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Maylu Burrows
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Tianhan Liu
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
| | - Michael Bodensteiner
- Department of Chemistry and Pharmacy, University of Regensburg, 93040 Regensburg, Germany
| | - Yuwaraj Adhikari
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
| | - Zhenqi Hua
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
| | - Brian Casas
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Luis Balicas
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States.,National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Peng Xiong
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
| | - Michael Shatruk
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States.,National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
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12
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Wang M, Li ZY, Ishikawa R, Yamashita M. Spin crossover and valence tautomerism conductors. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213819] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Nguyen MT, Jones RA, Holliday BJ. Incorporation of spin-crossover cobalt(II) complexes into conducting metallopolymers: Towards redox-controlled spin change. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123658] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Jung S, Huelsenbeck L, Hu Q, Robinson S, Giri G. Conductive, Large-Area, and Continuous 7,7,8,8-Tetracyanoquinodimethane@HKUST-1 Thin Films Fabricated Using Solution Shearing. ACS APPLIED MATERIALS & INTERFACES 2021; 13:10202-10209. [PMID: 33605712 DOI: 10.1021/acsami.1c00640] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Most metal-organic frameworks (MOFs) have an insulating nature due to their porosity and redox-inactive organic components. The electrical conductivity of the prototypical MOF, HKUST-1, can be tuned by infiltrating a small-molecule organic semiconductor, 7,7,8,8-tetracyanoquinodimethane (TCNQ), into the HKUST-1 pores, creating TCNQ@HKUST-1. However, current processes of creating TCNQ@HKUST-1 films have many roadblocks such as slow crystallization rates, which limit high throughput production, and the formation of Cu(TCNQ) as a byproduct, which affects the electrical conductivity and degrades the chemical structure of HKUST-1. In this work, we show that HKUST-1 films can be rapidly synthesized over large areas with consistent thickness and no pinholes via a meniscus-guided coating technique called solution shearing. The subsequent pore activation process and TCNQ impregnation can be completed via solvent exchange to minimize the formation of the Cu(TCNQ) byproduct, and we obtain an increase in electrical conductivity of the solution-sheared TCNQ@HKUST-1 thin films of over 7 orders of magnitude, reaching a maximum value of 2.42 × 10-2 S m-1 when TCNQ is incorporated for 10 days. The conductivity of solution-sheared TCNQ@HKUST-1 is higher compared to films formed by high-pressure pelletization of TCNQ@HKUST-1. We show that solution shearing can produce large-area thin films rapidly and reduce the formation of grain boundaries better than pelletization, allowing for large-area electronics with both charge transport and porosity for applications as sensors and electronics.
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Affiliation(s)
- Sangeun Jung
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Luke Huelsenbeck
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Qikun Hu
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, People's Republic of China
| | - Sean Robinson
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Gaurav Giri
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
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15
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Abstract
![]()
Metal–organic frameworks (MOFs)
are intrinsically porous
extended solids formed by coordination bonding between organic ligands
and metal ions or clusters. High electrical conductivity is rare in
MOFs, yet it allows for diverse applications in electrocatalysis,
charge storage, and chemiresistive sensing, among others. In this
Review, we discuss the efforts undertaken so far to achieve efficient
charge transport in MOFs. We focus on four common strategies that
have been harnessed toward high conductivities. In the “through-bond”
approach, continuous chains of coordination bonds between the metal
centers and ligands’ functional groups create charge transport
pathways. In the “extended conjugation” approach, the
metals and entire ligands form large delocalized systems. The “through-space”
approach harnesses the π–π stacking interactions
between organic moieties. The “guest-promoted” approach
utilizes the inherent porosity of MOFs and host–guest interactions.
Studies utilizing less defined transport pathways are also evaluated.
For each approach, we give a systematic overview of the structures
and transport properties of relevant materials. We consider the benefits
and limitations of strategies developed thus far and provide an overview
of outstanding challenges in conductive MOFs.
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Affiliation(s)
- Lilia S Xie
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Grigorii Skorupskii
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mircea Dincă
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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16
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Üngör Ö, Shatruk M. Transition metal complexes with fractionally charged TCNQ radical anions as structural templates for multifunctional molecular conductors. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114254] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Ishikawa R, Ueno S, Nifuku S, Horii Y, Iguchi H, Miyazaki Y, Nakano M, Hayami S, Kumagai S, Katoh K, Li ZY, Yamashita M, Kawata S. Simultaneous Spin-Crossover Transition and Conductivity Switching in a Dinuclear Iron(II) Coordination Compound Based on 7,7',8,8'-Tetracyano-p-quinodimethane. Chemistry 2020; 26:1278-1285. [PMID: 31670412 DOI: 10.1002/chem.201903934] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/31/2019] [Indexed: 11/08/2022]
Abstract
The reaction of Fe(OAc)2 and Hbpypz with neutral TCNQ results in the formation of [Fe2 (bpypz)2 (TCNQ)2 ](TCNQ)2 (1), in which Hbpypz=3,5-bis(2-pyridyl)pyrazole and TCNQ=7,7',8,8'-tetracyano-p-quinodimethane. Crystal packing of 1 with uncoordinated TCNQ and π-π stacking of bpypz- ligands produces an extended two-dimensional supramolecular coordination assembly. Temperature dependence of the dc magnetic susceptibility and heat capacity measurements indicate that 1 undergoes an abrupt spin crossover (SCO) with thermal spin transition temperatures of 339 and 337 K for the heating and cooling modes, respectively, resulting in a thermal hysteresis of 2 K. Remarkably, the temperature dependence of dc electrical transport exhibits a transition that coincides with thermal SCO, demonstrating the thermally induced magnetic and electrical bistability of 1, strongly correlating magnetism with electrical conductivity. This outstanding feature leads to thermally induced simultaneous switching of magnetism and electrical conductivity and a magnetoresistance effect.
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Affiliation(s)
- Ryuta Ishikawa
- Department of Chemistry, Faculty of Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
| | - Shuya Ueno
- Department of Chemistry, Faculty of Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
| | - Shoei Nifuku
- Department of Chemistry, Faculty of Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
| | - Yoji Horii
- Research Center for Structural Thermodynamics, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka, 560-0043, Japan
| | - Hiroaki Iguchi
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Yuji Miyazaki
- Research Center for Structural Thermodynamics, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka, 560-0043, Japan
| | - Motohiro Nakano
- Research Center for Structural Thermodynamics, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka, 560-0043, Japan
| | - Shinya Hayami
- Department of Chemistry, Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan.,Institute of Pulsed Power Science, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan
| | - Shohei Kumagai
- Department of Advanced Materials Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8561, Japan
| | - Keiichi Katoh
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Zhao-Yang Li
- School of Materials Science and Engineering, Nankai University, Tianjin, 300350, P. R. China
| | - Masahiro Yamashita
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan.,World Premier International Research Center Initiative, Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan.,School of Materials Science and Engineering, Nankai University, Tianjin, 300350, P. R. China
| | - Satoshi Kawata
- Department of Chemistry, Faculty of Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan
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18
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Yao ZS, Tang Z, Tao J. Bistable molecular materials with dynamic structures. Chem Commun (Camb) 2020; 56:2071-2086. [DOI: 10.1039/c9cc09238b] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this Feature Article, we introduce how to manipulate the motion of electrons or molecules by external stimuli, to achieve switchable properties in molecule-based single crystals.
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Affiliation(s)
- Zi-Shuo Yao
- Key Laboratory of Cluster Science of Ministry of Education
- School of Chemistry and Chemical Engineering
- Liangxiang Campus
- Beijing Institute of Technology
- Beijing 102488
| | - Zheng Tang
- Key Laboratory of Cluster Science of Ministry of Education
- School of Chemistry and Chemical Engineering
- Liangxiang Campus
- Beijing Institute of Technology
- Beijing 102488
| | - Jun Tao
- Key Laboratory of Cluster Science of Ministry of Education
- School of Chemistry and Chemical Engineering
- Liangxiang Campus
- Beijing Institute of Technology
- Beijing 102488
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19
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Berdiell IC, Hochdörffer T, Desplanches C, Kulmaczewski R, Shahid N, Wolny JA, Warriner SL, Cespedes O, Schünemann V, Chastanet G, Halcrow MA. Supramolecular Iron Metallocubanes Exhibiting Site-Selective Thermal and Light-Induced Spin-Crossover. J Am Chem Soc 2019; 141:18759-18770. [DOI: 10.1021/jacs.9b08862] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Izar Capel Berdiell
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Tim Hochdörffer
- Department of Physics, Technical University of Kaiserslautern, Erwin Schrödinger Straße 46, D-67663 Kaiserslautern, Germany
| | | | - Rafal Kulmaczewski
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Namrah Shahid
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Juliusz A. Wolny
- Department of Physics, Technical University of Kaiserslautern, Erwin Schrödinger Straße 46, D-67663 Kaiserslautern, Germany
| | - Stuart L. Warriner
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Oscar Cespedes
- School of Physics and Astronomy, EC Stoner Building, University of Leeds, Leeds LS2 9JT, U.K
| | - Volker Schünemann
- Department of Physics, Technical University of Kaiserslautern, Erwin Schrödinger Straße 46, D-67663 Kaiserslautern, Germany
| | | | - Malcolm A. Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
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20
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Shao D, Shi L, Shen FX, Wei XQ, Sato O, Wang XY. Reversible On–Off Switching of the Hysteretic Spin Crossover in a Cobalt(II) Complex via Crystal to Crystal Transformation. Inorg Chem 2019; 58:11589-11598. [DOI: 10.1021/acs.inorgchem.9b01436] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dong Shao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Le Shi
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Fu-Xing Shen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Xiao-Qin Wei
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka Nishi-ku, 816-8580 Fukuoka, Japan
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
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21
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Shi T, Xu Y, Zou YJ, Wang ZX. Synthesis, structure and magnetic properties of copper(ii) azide. Dalton Trans 2019; 48:11186-11190. [PMID: 31273361 DOI: 10.1039/c9dt01450k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel azide-bridged copper compound without an auxiliary ligand has been synthesized and characterized by single-crystal diffraction analysis. The compound consists of 1D double chains with end-on (EO) azide bridges. Furthermore, the neighboring chains are connected by weak coordination bonds, which leads to the formation of a 3D architecture. Low-temperature magnetic measurements reveal that antiferromagnetic interactions are dominant, with concomitant spin-canted antiferromagnetism.
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Affiliation(s)
- Taqing Shi
- School of Pharmacy, Guangdong Medical University, Dongguan 523800, People's Republic of China
| | - Ye Xu
- Department of Chemistry, Centre for Supramolecular Chemistry and Catalysis, Innovative Drug Research Centre, Shanghai University, Shanghai 200444, People's Republic of China.
| | - Ya-Jing Zou
- Department of Chemistry, Centre for Supramolecular Chemistry and Catalysis, Innovative Drug Research Centre, Shanghai University, Shanghai 200444, People's Republic of China.
| | - Zhao-Xi Wang
- Department of Chemistry, Centre for Supramolecular Chemistry and Catalysis, Innovative Drug Research Centre, Shanghai University, Shanghai 200444, People's Republic of China.
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22
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Kazakova AV, Tiunova AV, Korchagin DV, Shilov GV, Yagubskii EB, Zverev VN, Yang SC, Lin J, Lee J, Maximova OV, Vasiliev AN. The First Conducting Spin‐Crossover Compound Combining a Mn
III
Cation Complex with Electroactive TCNQ Demonstrating an Abrupt Spin Transition with a Hysteresis of 50 K. Chemistry 2019; 25:10204-10213. [DOI: 10.1002/chem.201901792] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 05/28/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Anna V. Kazakova
- Institute of problems of Chemical PhysicsRAS Chernogolovka 142432 Russia
| | - Aleksandra V. Tiunova
- Institute of problems of Chemical PhysicsRAS Chernogolovka 142432 Russia
- Lomonosov Moscow State University Moscow 119991 Russia
| | - Denis V. Korchagin
- Institute of problems of Chemical PhysicsRAS Chernogolovka 142432 Russia
| | - Gennady V. Shilov
- Institute of problems of Chemical PhysicsRAS Chernogolovka 142432 Russia
| | | | - Vladimir N. Zverev
- Institute of Solid State PhysicsRAS Chernogolovka 142432 Russia
- Moscow Institute of Physics and Technology Dolgoprudnyi 141700 Russia
| | - Shun Cheng Yang
- Institute of PhysicsNational Chiao Tung University Hsinchu 30010 Taiwan
| | - Jiunn‐Yuan Lin
- Institute of PhysicsNational Chiao Tung University Hsinchu 30010 Taiwan
- Center for Emergent Functional Matter ScienceNational Chiao Tung University Hsinchu 30010 Taiwan
| | - Jyh‐Fu Lee
- National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan
| | - Olga V. Maximova
- Lomonosov Moscow State University Moscow 119991 Russia
- National University of Science and Technology “MISIS” Moscow 119991 Russia
| | - Alexander N. Vasiliev
- Lomonosov Moscow State University Moscow 119991 Russia
- National University of Science and Technology “MISIS” Moscow 119991 Russia
- National Research South Ural State University Chelyabinsk 454080 Russia
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23
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Dale S, Bonanno NM, Pelaccia M, Lough AJ, Miyawaki A, Takahashi K, Lemaire MT. Ligand mixed-valence and electrical conductivity in coordination complexes containing a redox-active phenalenol-substituted ligand. Dalton Trans 2019; 48:8053-8056. [PMID: 31116216 DOI: 10.1039/c9dt01788g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A new redox-active hydrazone ligand bearing a phenalenol group is described (phpl), which produces neutral six-coordinate Fe and Co complexes (1 & 2) with the ligands identified in different oxidation states; an open-shell anion radical and closed-shell dianion. An intense and very low-energy intervalence charge transfer (IVCT) band is identified in solid-state and in solution in the complexes. Single crystals of 1 are semiconducting (at 300 K, σ = 3.05 × 10-4 S cm-1 with Ea = 245 meV).
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Affiliation(s)
- Sarah Dale
- Department of Chemistry, Brock University, St Catharines, Ontario L2S 3A1, Canada.
| | - Nico M Bonanno
- Department of Chemistry, Brock University, St Catharines, Ontario L2S 3A1, Canada.
| | - Mark Pelaccia
- Department of Chemistry, Brock University, St Catharines, Ontario L2S 3A1, Canada.
| | - Alan J Lough
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Atsuhiro Miyawaki
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe, Japan
| | - Kazuyuki Takahashi
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe, Japan
| | - Martin T Lemaire
- Department of Chemistry, Brock University, St Catharines, Ontario L2S 3A1, Canada.
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24
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Kobayashi F, Ohtani R, Nakamura M, Lindoy LF, Hayami S. Slow Magnetic Relaxation Triggered by a Structural Phase Transition in Long-Chain-Alkylated Cobalt(II) Single-Ion Magnets. Inorg Chem 2019; 58:7409-7415. [PMID: 31117627 DOI: 10.1021/acs.inorgchem.9b00543] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The behavior of single-ion magnets (SIMs) that reflects large distortions of their coordination environments caused by the packing of long alkyl chains for two Co(II) complexes of the type [Co(C n-terpy)2](BF4)2 (C n-terpy = 4'-alkoxy-2,2':6',2″-terpyridine; n = 10 (1), 16 (2)) is reported. 1·2MeOH, which features a highly distorted octahedral high-spin Co(II) center, exhibits field-induced slow magnetic relaxation under an applied dc field of 1000 Oe. Further detailed analysis of the relaxation process indicated the prevalence of the Raman process at low temperature. Surprisingly, 2 shows a reverse spin transition (rST) and also exhibits remarkable field-induced SIM behavior, revealing the presence of magnetic anisotropy for this high-spin Co(II) species that is triggered by a structural phase transition. We present here the first examples of the coexistence of field-induced slow magnetic relaxation and rST associated with structural phase transitions involving long-alkyl-chain conformational changes from gauche to anti. These results indicate the prospect of inducing SIM properties in other distorted high-spin Co(II) species bearing long alkyl chains.
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Affiliation(s)
- Fumiya Kobayashi
- Department of Chemistry, Graduate School of Science and Technology , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
| | - Ryo Ohtani
- Department of Chemistry, Graduate School of Science and Technology , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
| | - Masaaki Nakamura
- Department of Chemistry, Graduate School of Science and Technology , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
| | - Leonard F Lindoy
- School of Chemistry , The University of Sydney , Sydney , New South Wales 2006 , Australia
| | - 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 Pulsed Power Science (IPPS) , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
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25
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Molčanov K, Kojić-Prodić B. Towards understanding π-stacking interactions between non-aromatic rings. IUCRJ 2019; 6:156-166. [PMID: 30867913 PMCID: PMC6400184 DOI: 10.1107/s2052252519000186] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 01/04/2019] [Indexed: 05/16/2023]
Abstract
The first systematic study of π interactions between non-aromatic rings, based on the authors' own results from an experimental X-ray charge-density analysis assisted by quantum chemical calculations, is presented. The landmark (non-aromatic) examples include quinoid rings, planar radicals and metal-chelate rings. The results can be summarized as: (i) non-aromatic planar polyenic rings can be stacked, (ii) interactions are more pronounced between systems or rings with little or no π-electron delocalization (e.g. quinones) than those involving delocalized systems (e.g. aromatics), and (iii) the main component of the interaction is electrostatic/multipolar between closed-shell rings, whereas (iv) interactions between radicals involve a significant covalent contribution (multicentric bonding). Thus, stacking covers a wide range of interactions and energies, ranging from weak dispersion to unlocalized two-electron multicentric covalent bonding ('pancake bonding'), allowing a face-to-face stacking arrangement in some chemical species (quinone anions). The predominant interaction in a particular stacked system modulates the physical properties and defines a strategy for crystal engineering of functional materials.
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Affiliation(s)
- Krešimir Molčanov
- Department of Physical Chemistry, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
| | - Biserka Kojić-Prodić
- Department of Physical Chemistry, Rudjer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
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26
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Książek M, Weselski M, Ilczyszyn M, Kusz J, Bronisz R. Sliding Polymeric Layers and Anion Displacement Coupled with Spin Crossover in Two-Dimensional Networks of [Fe(hbtz) 2 (CH 3 CN) 2 ](BF 4 ) 2. Chemistry 2019; 25:2250-2261. [PMID: 30637819 DOI: 10.1002/chem.201804721] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 11/14/2018] [Indexed: 11/08/2022]
Abstract
The abrupt high spin (HS)→low spin (LS) transition (T↓ 1/2 =136 K) in [Fe(hbtz)2 (CH3 CN)2 ](BF4 )2 (hbtz=1,6-di(tetrazol-2-yl)hexane) is finished at 100 K and further thermal treatment influences the spin crossover. Subsequent heating involves a change of the spin state in the same way (T↑ 1/2 =136 K) on cooling. In contrast, cooling below 100 K triggers different behavior and T↑ 1/2 is shifted to 170 K. The extraordinary structural changes that occurred below 100 K are responsible for the observed diversity of properties. A unique feature of the low-temperature phase is the rebuilding of the anion network expressed by a shift of anions inside the polymeric layer at a distance of 1.2 Å as well as the relative shift of neighboring layers at over 4 Å. These structural alterations, connected with a phase transition, become the origin of the strain, which in most cases causes crystal cleaving. In a sample composed from crystals crushed as a result of the phase transition or as a result of mechanical crumbling, the hysteresis loop vanishes; however, annealing the sample allows to its partial restoration. A replacement of acetonitrile by other nitriles leads to preservation of the polymeric structure and spin crossover, but no phase transition follows.
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Affiliation(s)
- Maria Książek
- Institute of Physics, University of Silesia, 40-007, Katowice, Poland
| | - Marek Weselski
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Maria Ilczyszyn
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Joachim Kusz
- Institute of Physics, University of Silesia, 40-007, Katowice, Poland
| | - Robert Bronisz
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
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27
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Shao D, Shi L, Yin L, Wang BL, Wang ZX, Zhang YQ, Wang XY. Reversible on-off switching of both spin crossover and single-molecule magnet behaviours via a crystal-to-crystal transformation. Chem Sci 2018; 9:7986-7991. [PMID: 30450182 PMCID: PMC6202758 DOI: 10.1039/c8sc02774a] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 08/27/2018] [Indexed: 11/21/2022] Open
Abstract
The on-off switching of spin-crossover (SCO) and single-molecule magnetism (SMM) remains highly attractive, especially if it involves dynamic crystal-to-crystal transformation. Herein we report the first molecule, a mononuclear cobalt(ii) complex, that exhibits on-off switching between SCO and SMM reversibly during crystal-to-crystal transformation. Subtle structural transformation triggered by a simple dehydration-rehydration process induces significant geometrical changes of the CoII center and modification of the supramolecular interactions and switches its colour and magnetic properties (dark red/SCO-on/SMM-off ↔ orange/SCO-off/SMM-on). This work suggests that modification of the weak supramolecular interactions could be very effective in achieving switchable materials involving both SCO and SMM properties.
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Affiliation(s)
- Dong Shao
- State Key Laboratory of Coordination Chemistry , Collaborative Innovation Center of Advanced Microstructures , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , 210023 , China .
| | - Le Shi
- State Key Laboratory of Coordination Chemistry , Collaborative Innovation Center of Advanced Microstructures , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , 210023 , China .
| | - Lei Yin
- Wuhan National High Magnetic Field Centre , Huazhong University of Science and Technology , Wuhan , 430074 , China
| | - Bao-Lin Wang
- Jiangsu Key Laboratory for NSLSCS , School of Physical Science and Technology , Nanjing Normal University , Nanjing , 210023 , China
| | - Zhen-Xing Wang
- Wuhan National High Magnetic Field Centre , Huazhong University of Science and Technology , Wuhan , 430074 , China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS , School of Physical Science and Technology , Nanjing Normal University , Nanjing , 210023 , China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry , Collaborative Innovation Center of Advanced Microstructures , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , 210023 , China .
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28
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Kertesz M. Pancake Bonding: An Unusual Pi‐Stacking Interaction. Chemistry 2018; 25:400-416. [DOI: 10.1002/chem.201802385] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Revised: 06/14/2018] [Indexed: 01/22/2023]
Affiliation(s)
- Miklos Kertesz
- Chemistry Department and Institute of Soft Matter Georgetown University 37th and O Streets NW Washington, DC 20057-1227 USA
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29
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Gass IA, Lu J, Asadi M, Lupton DW, Forsyth CM, Geoghegan BL, Moubaraki B, Cashion JD, Martin LL, Bond AM, Murray KS. Use of the TCNQF 4 2- Dianion in the Spontaneous Redox Formation of [Fe III (L - ) 2 ][TCNQF 4 ⋅- ]. Chempluschem 2018; 83:658-668. [PMID: 31950640 DOI: 10.1002/cplu.201800010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 02/12/2018] [Indexed: 11/08/2022]
Abstract
The reaction of [FeII (L. )2 ](BF4 )2 with Li2 TCNQF4 results in the formation of [FeIII (L- )2 ][TCNQF4 . - ] (1) where L. is the radical ligand, 4,4-dimethyl-2,2-di(2-pyridyl)oxazolidine-N-oxide and TCNQF4 is 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane. This has been characterised by X-ray diffraction, Raman and Fourier transform infrared (FTIR) spectroscopy, variable-temperature magnetic susceptibility, Mössbauer spectroscopy and electrochemistry. X-ray diffraction studies, magnetic susceptibility measurements and Raman and FTIR spectroscopy suggest the presence of low-spin FeIII ions, the anionic form (L- ) of the ligand and the anionic radical form of TCNQF4 ; viz. TCNQF4 . - . Li2 TCNQF4 reduces the [FeII (L. )2 ]2+ dication, which undergoes a reductively induced oxidation to form the [FeIII (L- )2 ]+ monocation resulting in the formation of [FeIII (L- )2 ][TCNQF4 . - ] (1), the electrochemistry of which revealed four well-separated, diffusion-controlled, one-electron, reversible processes. Mössbauer spectroscopy and electrochemical measurements suggest the presence of a minor second species, likely to be [FeII (L. )2 ][TCNQF4 2- ].
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Affiliation(s)
- Ian A Gass
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia.,School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, BN2 4GJ, United Kingdom
| | - Jinzhen Lu
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Mousa Asadi
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - David W Lupton
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Craig M Forsyth
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Blaise L Geoghegan
- School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, BN2 4GJ, United Kingdom
| | | | - John D Cashion
- School of Physics and Astronomy, Monash University, Clayton, VIC, 3800, Australia
| | - Lisandra L Martin
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Alan M Bond
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Keith S Murray
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
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30
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Molčanov K, Mou Z, Kertesz M, Kojić-Prodić B, Stalke D, Demeshko S, Šantić A, Stilinović V. Pancake Bonding in π-Stacked Trimers in a Salt of Tetrachloroquinone Anion. Chemistry 2018; 24:8292-8297. [PMID: 29624761 DOI: 10.1002/chem.201800672] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Indexed: 11/07/2022]
Abstract
The crystal structure of [4-damp])2 [Cl4 Q]3 (4-damp=4-dimethylamino-N-methylpyridinium, Cl4 Q=tetrachloroquinone) salt is built up from slipped columnar stacks of quinoid rings composed of closely bound trimers with the intra-trimer separation distance of 2.84 Å and total charge of -2 whereas the inter-trimer distance is 3.59 Å. The individual rings exhibit partial negative charges that are distributed unevenly among the three Cl4 Qs in the trimer. The strong interactions within a trimer (Cl4 Q)32- have a partially covalent character with two-electron/multicentered bonding, that is extended over three rings, plausibly termed as "pancake bonding". The electron pairing within this multicentre bond leads to the fact that the crystals are diamagnetic and act as insulators. The studies of the structure and nature of bonding are based on X-ray charge density analysis and density functional theory.
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Affiliation(s)
| | - Zhongyu Mou
- Department of Chemistry and Institute of Soft Matter, Georgetown University, 424 Regents Hall, Washington, DC, 20057-1227, USA
| | - Miklos Kertesz
- Department of Chemistry and Institute of Soft Matter, Georgetown University, 424 Regents Hall, Washington, DC, 20057-1227, USA
| | | | - Dietmar Stalke
- Institut für Anorgansiche Chemie, Universität Göttingen, Tammanstraße 4, 37077, Göttingen, Germany
| | - Serhiy Demeshko
- Institut für Anorgansiche Chemie, Universität Göttingen, Tammanstraße 4, 37077, Göttingen, Germany
| | - Ana Šantić
- Rudjer Bošković Institute, Bijenička 54, 10000, Zagreb, Croatia
| | - Vladimir Stilinović
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000, Zagreb, Croatia
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31
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Yu F, Li J, Cao ZH, Kurmoo M, Zuo JL. Electrical Conductivity of Copper Hexamers Tuned by their Ground-State Valences. Inorg Chem 2018. [PMID: 29517912 DOI: 10.1021/acs.inorgchem.8b00243] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new design concept has been realized for the construction of molecular conductors, whereby the building unit contains a core reservoir of carriers made up of metal ions with controllable valence states and shelled by flat organic ligands having an extended π-system to promote supramolecular electronic communication. Therefore, reacting the conjugated multidentate ligand 5,5'-pyridyl-3,3'-bi-1 H-pyrazole with different copper salts solvothermally led to three interesting hexameric salts having different ground-state valences, [CuII6(L)4(NO3)(CH3OH)2](NO3)3·4CH3OH, [(CH3)2NH2][CuICuII5(L)4](SO4)2·4H2O, and [CuI2CuII4(L)4](NO3)2·2CH3OH. The monovalent CuII6 salt is an insulator, but the mixed-valent CuII5-CuI and CuII4-CuI2 salts are semiconductors. Magnetic exchange interactions up to JNN = -158 cm-1 dominate the susceptibilities and lead to ground-state spin ST = 1 (CuII6), 1/2 (CuII5-CuI), and 0 (CuII4-CuI2) at 40 K. Cyclic voltammetry shows the stepwise one-electron oxidation-reduction through all the possible valence states. The theoretical calculations of the electronic and band structures of the three compounds substantiate the experimentally observed physical properties.
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Affiliation(s)
- Fei Yu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210023 , P. R. China
| | - Jing Li
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210023 , P. R. China
| | - Zi-Heng Cao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210023 , P. R. China
| | - Mohamedally Kurmoo
- Institut de Chimie de Strasbourg , Université de Strasbourg, CNRS-UMR 7177 , 4 rue Blaise Pascal , 67008 Strasbourg , France
| | - Jing-Lin Zuo
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210023 , P. R. China
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32
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Zhang Y, Harriman KLM, Brunet G, Pialat A, Gabidullin B, Murugesu M. Reversible Redox, Spin Crossover, and Superexchange Coupling in 3
d
Transition‐Metal Complexes of
Bis
‐azinyl Analogues of 2,2′:6′,2′′‐Terpyridine. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800065] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yixin Zhang
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
| | - Katie L. M. Harriman
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
| | - Gabriel Brunet
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
| | - Amélie Pialat
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
| | - Bulat Gabidullin
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
| | - Muralee Murugesu
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
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33
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Feltham HLC, Dankhoff K, Meledandri CJ, Brooker S. Towards Dual-Functionality Spin-Crossover Complexes. Chempluschem 2018; 83:582-589. [DOI: 10.1002/cplu.201700512] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/09/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Humphrey L. C. Feltham
- Department of Chemistry; University of Otago; MacDiarmid Institute for Advanced Materials and Nanotechnology; PO Box 56 Dunedin 9054 New Zealand
| | - Katja Dankhoff
- Department of Chemistry; University of Otago; MacDiarmid Institute for Advanced Materials and Nanotechnology; PO Box 56 Dunedin 9054 New Zealand
- Current address: Inorganic Chemistry II, Department of Chemistry; University of Bayreuth; Universitätstrasse 30 Bayreuth 95447 Germany
| | - Carla J. Meledandri
- Department of Chemistry; University of Otago; MacDiarmid Institute for Advanced Materials and Nanotechnology; PO Box 56 Dunedin 9054 New Zealand
| | - Sally Brooker
- Department of Chemistry; University of Otago; MacDiarmid Institute for Advanced Materials and Nanotechnology; PO Box 56 Dunedin 9054 New Zealand
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34
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Wang ZX, Wu LF, Zhang X, Xing F, Li MX. Structural diversity and magnetic properties of six cobalt coordination polymers based on 2,2'-phosphinico-dibenzoate ligand. Dalton Trans 2018; 45:19500-19510. [PMID: 27896355 DOI: 10.1039/c6dt04010a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Six novel Co(ii) coordination polymers, namely, [Co10L6(OH)2(H2O)9]·10.5H2O (1), [Co3L2(3-abpt)2]·4H2O (2), [Co3L2(4-azpy)2(H2O)2(EtOH)] (3), [Co3L2(4,4'-bipy)2(H2O)2(MeCN)] (4), [Co3L2(4,4'-bipy)2] (5), and [Co5L2(OH)2(ina)2(H2O)2] (6) (H3L = 2,2'-phosphinico-dibenzoic acid, 3-abpt = 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole, 4-azpy = 4,4'-azobispyridine, 4,4'-bipy = 4,4'-bipyridine, Hina = isonicotinic acid), have been hydrothermally synthesized and their magnetic properties have been characterized. The L3- anion displays six types of coordination modes in the compounds. Compound 1 exhibits a novel 1D ladder-like structure, which consists of non-centrosymmetric Co10 units. Compounds 2-4 comprise 2D networks assembled from Co3L2 chains and N-heterocyclic linkers. Compound 5 comprises a 3D framework built from six neighboring parallel Co3L2 ladders bridged by 4,4'-bipy linkers. Compound 6 features a 3D framework that exhibits pcu topology with the Schläfli symbol of (412·63) using a pentanuclear [Co5(OH)2]8+ cluster as the node. Variable-temperature magnetic susceptibility studies indicate that the six coordination polymers exhibit remarkable magnetic behavior such as spin-canted antiferromagnetism and spin glass, which were found to coexist in compound 6.
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Affiliation(s)
- Zhao-Xi Wang
- Department of Chemistry, Center for Supramolecular Chemistry and Catalysis, Innovative Drug Research Center, Shanghai University, Shanghai 200444, People's Republic of China. and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
| | - Lin-Fei Wu
- Department of Chemistry, Center for Supramolecular Chemistry and Catalysis, Innovative Drug Research Center, Shanghai University, Shanghai 200444, People's Republic of China.
| | - Xuan Zhang
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX 77842-3012, USA
| | - Feifei Xing
- Department of Chemistry, Center for Supramolecular Chemistry and Catalysis, Innovative Drug Research Center, Shanghai University, Shanghai 200444, People's Republic of China.
| | - Ming-Xing Li
- Department of Chemistry, Center for Supramolecular Chemistry and Catalysis, Innovative Drug Research Center, Shanghai University, Shanghai 200444, People's Republic of China.
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35
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Zhang XP, Wang LL, Zhang DS, Qi XW, Shi ZF, Lin Q. Solvent-tuned charge-transfer properties of chiral Pt(ii) complex and TCNQ˙− anion adducts. RSC Adv 2018; 8:10756-10763. [PMID: 35541534 PMCID: PMC9078908 DOI: 10.1039/c8ra01330f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Accepted: 03/04/2018] [Indexed: 11/22/2022] Open
Abstract
A new pair of adducts comprising one chiral Pt(ii) complex cation, [Pt((−)-L1)(Dmpi)]+ ((−)-1) or [Pt((+)-L1)(Dmpi)]+ ((+)-1) [(−)-L1 = (−)-4,5-pinene-6′-phenyl-2,2′-bipyridine, (+)-L1 = (+)-4,5-pinene-6′-phenyl-2,2′-bipyridine, Dmpi = 2,6-dimethylphenylisocyanide], together with one TCNQ˙− anion have been obtained, and the structures have been confirmed via single-crystal X-ray crystallography and infrared (IR) spectroscopy. The chiral Pt(ii) cation and TCNQ˙− anion are dissociated in MeOH solution, while charge transfer adducts are formed in H2O solution, leading to perturbation of the electronic structure and alteration of the chiral environment, as evidenced by the differences in the UV-vis absorption and electronic circular dichroism spectra. The solvent-tuned charge-transfer properties also have been validated through emission and resonance light scattering spectra. The interesting findings may have potential applications in the development of black absorbers and wide band gap semiconductors. A new couple of charge transfer adducts comprising of one chiral Pt(ii) complex cation together with one TCNQ˙− anion have been prepared, and solvent-induced variances of absorption, luminescence as well as chiral spectra have been investigated.![]()
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Affiliation(s)
- Xiao-Peng Zhang
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province
- College of Chemistry and Chemical Engineering
- Hainan Normal University
- Haikou 571158
- People's Republic of China
| | - Li-Li Wang
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province
- College of Chemistry and Chemical Engineering
- Hainan Normal University
- Haikou 571158
- People's Republic of China
| | - Da-Shuai Zhang
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province
- College of Chemistry and Chemical Engineering
- Hainan Normal University
- Haikou 571158
- People's Republic of China
| | - Xiao-Wei Qi
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province
- College of Chemistry and Chemical Engineering
- Hainan Normal University
- Haikou 571158
- People's Republic of China
| | - Zai-Feng Shi
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province
- College of Chemistry and Chemical Engineering
- Hainan Normal University
- Haikou 571158
- People's Republic of China
| | - Qiang Lin
- Key Laboratory of Water Pollution Treatment & Resource Reuse of Hainan Province
- College of Chemistry and Chemical Engineering
- Hainan Normal University
- Haikou 571158
- People's Republic of China
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36
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Murata S, Takahashi K, Sakurai T, Ohta H. Single-crystal-to-single-crystal transformation in hydrogen-bond-induced high-spin pseudopolymorphs from protonated cation salts with a π-extended spin crossover Fe(III) complex anion. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.03.046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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37
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Shao D, Deng L, Shi L, Wu D, Wei X, Yang S, Wang X. Slow Magnetic Relaxation and Spin‐Crossover Behavior in a Bicomponent Ion‐Pair Cobalt(II) Complex. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700719] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dong Shao
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Lin‐Dan Deng
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Le Shi
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Dong‐Qing Wu
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Xiao‐Qin Wei
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Si‐Run Yang
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
| | - Xin‐Yi Wang
- School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced Microstructures Nanjing University 210023 Nanjing P. R. China
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38
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Senthil Kumar K, Ruben M. Emerging trends in spin crossover (SCO) based functional materials and devices. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.03.024] [Citation(s) in RCA: 503] [Impact Index Per Article: 71.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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39
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Spin-Singlet Transition in the Magnetic Hybrid Compound from a Spin-Crossover Fe(III) Cation and π-Radical Anion. INORGANICS 2017. [DOI: 10.3390/inorganics5030054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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40
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Zhang JY, Su LJ, Guo QJ, Tao J. Semiconducting spin-crossover cobalt (II) compound with non-integer charge distribution among TCNQ radicals. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2017.05.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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41
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Zhang X, Xie H, Ballesteros-Rivas M, Woods TJ, Dunbar KR. Conducting Molecular Nanomagnet of Dy III with Partially Charged TCNQ Radicals. Chemistry 2017; 23:7448-7452. [PMID: 28401665 DOI: 10.1002/chem.201701590] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Indexed: 11/06/2022]
Abstract
Bifunctional electrically conducting single-molecule magnets are highly promising platforms for non-volatile memory devices and quantum computing applications. The development of these molecular materials, however, has largely been hindered by the lack of straightforward synthetic methods. Herein a facile and modular approach is demonstrated for the realization of bifunctional materials that does not require electrochemical or chemical oxidation to obtain partially charged organic radicals. Magnetic and electrical conductivity studies reveal that the DyIII compound exhibits slow relaxation of the magnetization between 5.0-8.0 K and semiconducting behavior over the range 180-350 K. DC magnetic fields have been found to suppress the quantum tunneling of the magnetization and affect the spin-canted antiferromagnetic interactions.
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Affiliation(s)
- Xuan Zhang
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX, 77842-3012, USA
| | - Haomiao Xie
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX, 77842-3012, USA
| | - Maria Ballesteros-Rivas
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX, 77842-3012, USA
| | - Toby J Woods
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX, 77842-3012, USA
| | - Kim R Dunbar
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX, 77842-3012, USA
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42
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The Highly Conducting Spin-Crossover Compound Combining Fe(III) Cation Complex with TCNQ in a Fractional Reduction State. Synthesis, Structure, Electric and Magnetic Properties. MAGNETOCHEMISTRY 2017. [DOI: 10.3390/magnetochemistry3010009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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43
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Shvachko YN, Starichenko DV, Korolyov AV, Yagubskii EB, Kotov AI, Buravov LI, Lyssenko KA, Zverev VN, Simonov SV, Zorina LV, Shakirova OG, Lavrenova LG. The Conducting Spin-Crossover Compound Combining Fe(II) Cation Complex with TCNQ in a Fractional Reduction State. Inorg Chem 2016; 55:9121-30. [DOI: 10.1021/acs.inorgchem.6b01829] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuri N. Shvachko
- M. N. Miheev Institute of Metal Physics, Ural Branch of Russian Academy of Sciences, S. Kovalevskaya Street 18, Yekaterinburg 620137, Russia
| | - Denis V. Starichenko
- M. N. Miheev Institute of Metal Physics, Ural Branch of Russian Academy of Sciences, S. Kovalevskaya Street 18, Yekaterinburg 620137, Russia
| | - Aleksander V. Korolyov
- M. N. Miheev Institute of Metal Physics, Ural Branch of Russian Academy of Sciences, S. Kovalevskaya Street 18, Yekaterinburg 620137, Russia
| | - Eduard B. Yagubskii
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov Avenue 1, Chernogolovka, 142432 Moscow District, Russia
| | - Alexander I. Kotov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov Avenue 1, Chernogolovka, 142432 Moscow District, Russia
| | - Lev I. Buravov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov Avenue 1, Chernogolovka, 142432 Moscow District, Russia
| | - Konstantin A. Lyssenko
- A.N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov Street 28, Moscow 119991, Russia
| | - Vladimir N. Zverev
- Institute of Solid State Physics, Russian Academy of Sciences, Ossipyan Street 2, Chernogolovka 142432, Moscow District, Russia
- Moscow Institute of Physics and Technology, Dolgoprudnyi, Moscow District 141700, Russia
| | - Sergey V. Simonov
- Institute of Solid State Physics, Russian Academy of Sciences, Ossipyan Street 2, Chernogolovka 142432, Moscow District, Russia
| | - Leokadiya V. Zorina
- Institute of Solid State Physics, Russian Academy of Sciences, Ossipyan Street 2, Chernogolovka 142432, Moscow District, Russia
| | - Olga G. Shakirova
- Komsomolsk-on-Amur State Technical University, Lenin Avenue 27, Komsomolsk-on-Amur 681013, Russia
| | - Lyudmila G. Lavrenova
- Nikolaev
Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, Lavrentyev Avenue 3, Novosibirsk 630090, Russia
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44
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Chappell S, Brooke C, Nichols RJ, Kershaw Cook LJ, Halcrow M, Ulstrup J, Higgins SJ. Evidence for a hopping mechanism in metal|single molecule|metal junctions involving conjugated metal–terpyridyl complexes; potential-dependent conductances of complexes [M(pyterpy)2]2+ (M = Co and Fe; pyterpy = 4′-(pyridin-4-yl)-2,2′:6′,2′′-terpyridine) in ionic liquid. Faraday Discuss 2016; 193:113-131. [DOI: 10.1039/c6fd00080k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Extensive studies of various families of conjugated molecules in metal|molecule|metal junctions suggest that the mechanism of conductance is usually tunnelling for molecular lengths < ca. 4 nm, and that for longer molecules, coherence is lost as a hopping element becomes more significant. In this work we present evidence that, for a family of conjugated, redox-active metal complexes, hopping may be a significant factor for even the shortest molecule studied (ca. 1 nm between contact atoms). The length dependence of conductance for two series of such complexes which differ essentially in the number of conjugated 1,4-C6H4- rings in the structures has been studied, and it is found that the junction conductances vary linearly with molecular length, consistent with a hopping mechanism, whereas there is significant deviation from linearity in plots of log(conductance) vs. length that would be characteristic of tunnelling, and the slopes of the log(conductance)–length plots are much smaller than expected for an oligophenyl system. Moreover, the conductances of molecular junctions involving the redox–active molecules, [M(pyterpy)2]2+/3+ (M = Co, Fe) have been studied as a function of electrochemical potential in ionic liquid electrolyte, and the conductance–overpotential relationship is found to fit well with the Kuznetsov–Ulstrup relationship, which is essentially a hopping description.
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Affiliation(s)
- Sarah Chappell
- Department of Chemistry
- University of Liverpool
- Liverpool L69 7ZD
- UK
| | - Carly Brooke
- Department of Chemistry
- University of Liverpool
- Liverpool L69 7ZD
- UK
| | | | | | | | - Jens Ulstrup
- Department of Chemistry
- Technical University of Denmark
- DK-2800 Kgs. Lyngby
- Denmark
| | - Simon J. Higgins
- Department of Chemistry
- University of Liverpool
- Liverpool L69 7ZD
- UK
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