1
|
Yang G, Wu SG, Ruan ZY, Chen YC, Xie KP, Ni ZP, Tong ML. Single-Crystal Transformation Engineering the Spin Change of Metal-Organic Frameworks via Cluster Deconstruction. Angew Chem Int Ed Engl 2023; 62:e202312685. [PMID: 37779343 DOI: 10.1002/anie.202312685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/29/2023] [Accepted: 09/29/2023] [Indexed: 10/03/2023]
Abstract
Spin crossover (SCO) materials with new architectures will expand and enrich the research in the SCO field. Here, we report two metal-organic frameworks (MOFs) containing tetradentate organic ligands and hexatopic linkers [Ag8 X8 (CN)6 ]6- (X=Br and I), which represents the first SCO MOF with clusters as building blocks. The silver halide cluster can be further removed after reacting with lithium tetracyanoquinodimethan (LiTCNQ). Such post-synthetic modification (PSM) is realized via single-crystal to single-crystal (SCSC) transformation from urk to nbo topology. Accordingly, the spin state and fluorescence properties are greatly modified by cluster deconstruction. Therefore, these achievements will provide new ideas for the design of new SCO systems and the development of PSM methods.
Collapse
Affiliation(s)
- Guang Yang
- 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, 510275, 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, 510275, 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, 510275, 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, 510275, P. R. China
| | - Kai-Ping Xie
- 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, 510275, P. R. China
| | - Zhao-Ping Ni
- 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, 510275, 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, 510275, P. R. China
| |
Collapse
|
2
|
Kc K, Woods T, Olshansky L. Ligand Modifications Produce Two-Step Magnetic Switching in a Cobalt(dioxolene) Complex. Angew Chem Int Ed Engl 2023; 62:e202311790. [PMID: 37733206 PMCID: PMC10615740 DOI: 10.1002/anie.202311790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 09/22/2023]
Abstract
Mononuclear monodioxolene valence tautomeric (VT) cobalt complexes typically exist in their low spin (l.s.) CoIII (cat2- ) and high spin (h.s.) CoII (sq⋅- ) forms (cat2- =catecholato, and sq⋅- =seminquinonato forms of 3,5-di-t Bu-1,2-dioxolene), which reversibly interconvert via temperature-dependent intramolecular electron transfer. Typically, the remaining four coordination sites on cobalt are supported by a tetradentate ligand whose properties influence the temperature at which VT occurs. We report that replacing one chelating pyridyl arm of tris(2-pyridylmethyl)amine (tpa) with a weaker field ortho-anisole moiety facilitates access to a third magnetic state, and examine a series of related complexes. Variable temperature crystallographic, magnetic, calorimetric, and spectroscopic studies support that this third state is consistent with l.s. CoII (sq⋅- ). Thus, our ligand modifications not only provide access to the VT transition from l.s. CoIII (cat2- ) to l.s. CoII (sq⋅- ), but at higher temperatures, the complex undergoes spin crossover from l.s. CoII (sq⋅- ) to h.s. CoII (sq⋅- ), representing the first example of two-step magnetic switching in a mononuclear monodioxolene cobalt complex. We hypothesize that ligand dynamicity may facilitate access to the rarely observed l.s. CoII (sq⋅- ) intermediate state, suggesting a new design criterion in the development of stimulus-responsive multi-state molecular switches.
Collapse
Affiliation(s)
- Khadanand Kc
- Department of Chemistry, Center for Biophysics and Quantitative Biology, Materials Research Laboratory, University of Illinois, Urbana-Champaign, Urbana, Illinois, 61801, USA
| | - Toby Woods
- George L. Clark X-Ray Facility and 3 M Materials Laboratory, University of Illinois, Urbana-Champaign, Urbana, Illinois, 61801, USA
| | - Lisa Olshansky
- Department of Chemistry, Center for Biophysics and Quantitative Biology, Materials Research Laboratory, University of Illinois, Urbana-Champaign, Urbana, Illinois, 61801, USA
| |
Collapse
|
3
|
Sun HY, Meng YS, Zhao L, Yao NT, Mao PD, Liu Q, Yan FF, Oshio H, Liu T. Colossal Anisotropic Thermal Expansion through Coupling Spin Crossover and Rhombus Deformation in a Hexanuclear {FeIII4FeII2} Compound. Angew Chem Int Ed Engl 2023:e202302815. [PMID: 37178444 DOI: 10.1002/anie.202302815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/15/2023] [Accepted: 05/11/2023] [Indexed: 05/15/2023]
Abstract
Colossal and anisotropic thermal expansion is a key function for microscale or nanoscale actuators in material science. Herein, we present a hexanuclear compound of [(Tp*)FeIII(CN)3]4[FeII(Ppmp)]2·2CH3OH (1, Tp* = hydrotris(3,5-dimethyl-pyrazol-1-yl)borate and Ppmp = 2-[3-(2'-pyridyl)pyrazol-1-ylmethyl]pyridine), which has a rhombic core structure abbreviated as {FeIII2FeII2}. Magnetic susceptibility measurements and single-crystal X-ray diffraction analyses revealed that 1 underwent temperature-induced spin transition with the thermal hysteresis. The FeII site in 1 behaved as a spin crossover (SCO) unit, and significant deformation of its octahedron was observed during the spin transition process. Moreover, the distortion of the FeII centers actuated anisotropic deformation of the rhombic {FeIII2FeII2} core, which was spread over the whole crystal through the subsequent molecular rearrangements, leading to the colossal anisotropic thermal expansion. Our results provide a rational strategy for realizing the colossal anisotropic thermal expansion and shape memory effects by tuning the magnetic bistability.
Collapse
Affiliation(s)
- Hui-Ying Sun
- Dalian University of Technology, State Key Laboratory of Fine Chemicals, CHINA
| | - Yin-Shan Meng
- Dalian University of Technology, State Key Laboratory of Fine Chemicals, CHINA
| | - Liang Zhao
- Dalian University of Technology, State Key Laboratory of Fine Chemicals, CHINA
| | - Nian-Tao Yao
- Dalian University of Technology, State Key Laboratory of Fine Chemicals, CHINA
| | - Pan-Dong Mao
- Dalian University of Technology, State Key Laboratory of Fine Chemicals, CHINA
| | - Qiang Liu
- Dalian University of Technology, State Key Laboratory of Fine Chemicals, CHINA
| | - Fei-Fei Yan
- Dalian University of Technology, State Key Laboratory of Fine Chemicals, CHINA
| | - Hiroki Oshio
- Dalian University of Technology, State Key Laboratory of Fine Chemicals, CHINA
| | - Tao Liu
- Dalian University of Technology, State Key Laboratory of Fine Chemicals, 2 Linggong Rd., 116024, Dalian, CHINA
| |
Collapse
|
4
|
Kelly CT, Dunne S, Kühne IA, Barker A, Esien K, Felton S, Müller-Bunz H, Ortin Y, Morgan GG. Proton-Induced Spin State Switching in an Fe III Complex. Angew Chem Int Ed Engl 2023; 62:e202217388. [PMID: 36794891 DOI: 10.1002/anie.202217388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/25/2023] [Accepted: 02/13/2023] [Indexed: 02/17/2023]
Abstract
Reversible proton-induced spin state switching of an FeIII complex in solution is observed at room temperature. A reversible magnetic response was detected in the complex, [FeIII (sal2 323)]ClO4 (1), using Evans' method 1 H NMR spectroscopy which indicated cumulative switching from low-spin to high-spin upon addition of one and two equivalents of acid. Infrared spectroscopy suggests a coordination-induced spin state switching (CISSS) effect, whereby protonation displaces the metal-phenoxo donors. The analogous complex, [FeIII (4-NEt2 -sal2 323)]ClO4 (2), with a diethylamino group on the ligand, was used to combine the magnetic change with a colorimetric response. Comparison of the protonation responses of 1 and 2 reveals that the magnetic switching is caused by perturbation of the immediate coordination sphere of the complex. These complexes constitute a new class of analyte sensor which operate by magneto-modulation, and in the case of 2, also yield a colorimetric response.
Collapse
Affiliation(s)
- Conor T Kelly
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Sean Dunne
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Irina A Kühne
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Andrew Barker
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Kane Esien
- Centre for Nanostructured Media, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, Belfast, UK
| | - Solveig Felton
- Centre for Nanostructured Media, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, Belfast, UK
| | - Helge Müller-Bunz
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Yannick Ortin
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Grace G Morgan
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| |
Collapse
|
5
|
Owczarek M, Lee M, Liu S, Blake ER, Taylor CS, Newman GA, Eckert JC, Leal JH, Semelsberger TA, Cheng HP, Nie W, Zapf VS. Near-Room-Temperature Magnetoelectric Coupling via Spin Crossover in an Iron(II) Complex. Angew Chem Int Ed Engl 2022; 61:e202214335. [PMID: 36307376 PMCID: PMC10099592 DOI: 10.1002/anie.202214335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Indexed: 11/06/2022]
Abstract
Magnetoelectric coupling is achieved near room temperature in a spin crossover FeII molecule-based compound, [Fe(1bpp)2 ](BF4 )2 . Large atomic displacements resulting from Jahn-Teller distortions induce a change in the molecule dipole moment when switching between high-spin and low-spin states leading to a step-wise change in the electric polarization and dielectric constant. For temperatures in the region of bistability, the changes in magnetic and electrical properties are induced with a remarkably low magnetic field of 3 T. This result represents a successful expansion of magnetoelectric spin crossovers towards ambient conditions. Moreover, the observed 0.3-0.4 mC m-2 changes in the H-induced electric polarization suggest that the high strength of the coupling obtained via this route is accessible not just at cryogenic temperatures but also near room temperature, a feature that is especially appealing in the light of practical applications.
Collapse
Affiliation(s)
- Magdalena Owczarek
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Minseong Lee
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Shuanglong Liu
- Department of Physics, Quantum Theory Project, Center for Molecular Magnetic Quantum Materials, University of Florida, Gainesville, FL 32611, USA
| | | | | | | | | | - Juan H Leal
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Troy A Semelsberger
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Hai-Ping Cheng
- Department of Physics, Quantum Theory Project, Center for Molecular Magnetic Quantum Materials, University of Florida, Gainesville, FL 32611, USA
| | - Wanyi Nie
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Vivien S Zapf
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| |
Collapse
|
6
|
Johannsen S, Ossinger S, Grunwald J, Herman A, Wende H, Tuczek F, Gruber M, Berndt R. Spin Crossover in a Cobalt Complex on Ag(111). Angew Chem Int Ed Engl 2022; 61:e202115892. [PMID: 35032345 PMCID: PMC9303790 DOI: 10.1002/anie.202115892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Indexed: 12/05/2022]
Abstract
The Co‐based complex [Co(H2B(pz)(pypz))2] (py=pyridine, pz=pyrazole) deposited on Ag(111) was investigated with scanning tunneling microscopy at ≈5 K. Due to a bis(tridentate) coordination sphere the molecules aggregate mainly into tetramers. Individual complexes in these tetramers undergo reversible transitions between two states with characteristic image contrasts when current is passed through them or one of their neighbors. Two molecules exhibit this bistability while the other two molecules are stable. The transition rates vary linearly with the tunneling current and exhibit an intriguing dependence on the bias voltage and its polarity. We interpret the states as being due to S=1/2 and 3/2 spin states of the Co2+ complex. The image contrast and the orders‐of‐magnitude variations of the switching yields can be tentatively understood from the calculated orbital structures of the two spin states, thus providing first insights into the mechanism of electron‐induced excited spin‐state trapping (ELIESST).
Collapse
Affiliation(s)
- Sven Johannsen
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, 24098, Kiel, Germany
| | - Sascha Ossinger
- Institut für Anorganische Chemie, Christian-Albrechts-Universität, 24098, Kiel, Germany.,Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Jan Grunwald
- Institut für Anorganische Chemie, Christian-Albrechts-Universität, 24098, Kiel, Germany
| | - Alexander Herman
- Faculty of Physics and CENIDE, University of Duisburg-Essen, 47057, Duisburg, Germany
| | - Heiko Wende
- Faculty of Physics and CENIDE, University of Duisburg-Essen, 47057, Duisburg, Germany
| | - Felix Tuczek
- Institut für Anorganische Chemie, Christian-Albrechts-Universität, 24098, Kiel, Germany
| | - Manuel Gruber
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, 24098, Kiel, Germany.,Faculty of Physics and CENIDE, University of Duisburg-Essen, 47057, Duisburg, Germany
| | - Richard Berndt
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, 24098, Kiel, Germany
| |
Collapse
|