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Ren S, Fonseca E, Perry W, Cheng HP, Zhang XG, Hennig RG. Ligand Optimization of Exchange Interaction in Co(II) Dimer Single Molecule Magnet by Machine Learning. J Phys Chem A 2022; 126:529-535. [PMID: 35068152 DOI: 10.1021/acs.jpca.1c08950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Designing single-molecule magnets (SMMs) for potential applications in quantum computing and high-density data storage requires tuning their magnetic properties, especially the strength of the magnetic interaction. These properties can be characterized by first-principles calculations based on density functional theory (DFT). In this work, we study the experimentally synthesized Co(II) dimer (Co2(C5NH5)4(μ-PO2(CH2C6H5)2)3) SMM with the goal to control the exchange energy, ΔEJ, between the Co atoms through tuning of the capping ligands. The experimentally synthesized Co(II) dimer molecule has a very small ΔEJ < 1 meV. We assemble a DFT data set of 1081 ligand substitutions for the Co(II) dimer. The ligand exchange provides a broad range of exchange energies, ΔEJ, from +50 to -200 meV, with 80% of the ligands yielding a small ΔEJ < 10 meV. We identify descriptors for the classification and regression of ΔEJ using gradient boosting machine learning models. We compare one-hot encoded, structure-based, and chemical descriptors consisting of the HOMO/LUMO energies of the individual ligands and the maximum electronegativity difference and bond order for the ligand atom connecting to Co. We observe a similar overall performance with the chemical descriptors outperforming the other descriptors. We show that the exchange coupling, ΔEJ, is correlated to the difference in the average bridging angle between the ferromagnetic and antiferromagnetic states, similar to the Goodenough-Kanamori rules.
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Affiliation(s)
- Sijin Ren
- Department of Physics, University of Florida, Gainesville, Florida 32611, United States.,Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, United States.,Quantum Theory Project, University of Florida, Gainesville, Florida 32 611, United States
| | - Eric Fonseca
- Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, United States.,Quantum Theory Project, University of Florida, Gainesville, Florida 32 611, United States
| | - William Perry
- Department of Physics, University of Florida, Gainesville, Florida 32611, United States.,Quantum Theory Project, University of Florida, Gainesville, Florida 32 611, United States
| | - Hai-Ping Cheng
- Department of Physics, University of Florida, Gainesville, Florida 32611, United States.,Quantum Theory Project, University of Florida, Gainesville, Florida 32 611, United States
| | - Xiao-Guang Zhang
- Department of Physics, University of Florida, Gainesville, Florida 32611, United States.,Quantum Theory Project, University of Florida, Gainesville, Florida 32 611, United States
| | - Richard G Hennig
- Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, United States.,Quantum Theory Project, University of Florida, Gainesville, Florida 32 611, United States
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Carson I, Tasker PA, Love JB, Moser M, Fischmann AJ, Jakovljevic B, Soderstrom MD, Morrison CA. The Supramolecular and Coordination Chemistry of Cobalt(II) Extraction by Phosphinic Acids. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701473] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Innis Carson
- School of Chemistry and EaStCHEM Research School University of Edinburgh David Brewster Road EH9 3FJ Edinburgh UK
| | - Peter A. Tasker
- School of Chemistry and EaStCHEM Research School University of Edinburgh David Brewster Road EH9 3FJ Edinburgh UK
| | - Jason B. Love
- School of Chemistry and EaStCHEM Research School University of Edinburgh David Brewster Road EH9 3FJ Edinburgh UK
| | - Michael Moser
- Solvay Metal Extraction Products 1937 W Main St 06902 Stamford CT USA
| | - Adam J. Fischmann
- Solvay Metal Extraction Products 1937 W Main St 06902 Stamford CT USA
| | - Boban Jakovljevic
- Solvay Metal Extraction Products 9061 Garner Road L2E6S5 Niagara Falls ON Canada
| | - Matthew D. Soderstrom
- Solvay Metal Extraction Products 2085 East Technology Circle, Suite 102 85284 Tempe AZ USA
| | - Carole A. Morrison
- School of Chemistry and EaStCHEM Research School University of Edinburgh David Brewster Road EH9 3FJ Edinburgh UK
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Maass JS, Wilharm RK, Luck RL, Zeller M. Photoluminescent properties of three lanthanide compounds of formulae LnCl3(diphenyl((5-phenyl-1H-pyrazol-3-yl)methyl)phosphine oxide)2, Ln = Sm, Eu and Tb: X-ray structural, emission and vibrational spectroscopies, DFT and thermogravimetric studies. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.11.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Zaręba JK, Janczak J, Samoć M, Nyk M. Spectrally-resolved third-harmonic generation and the fundamental role of O-HCl hydrogen bonding in O h, T d-cobalt(ii) tetraphenylmethane-based coordination polymers. Dalton Trans 2017; 46:9349-9357. [PMID: 28675207 DOI: 10.1039/c7dt01518f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The reaction of a phosphonate-diester tetraphenylmethane-based tecton, tetrakis[4-(diethoxyphosphoryl)phenyl]methane, (L) with cobalt(ii) chloride afforded a centrosymmetric coordination polymer (CP), [L·2Co(H2O)42+·2CoCl42-]n, 2-Cl, possessing simultaneously octahedral (Oh) and tetrahedral (Td) metal centers. This material served as a model compound for the demonstration of factors influencing the spectral dependence of one of the nonlinear optical (NLO) phenomena, the third-harmonic generation (THG). The spectrally-resolved THG (SR-THG) measurements in the range from 1125 to 1750 nm revealed that a maximum of THG response is obtained when the fundamental beam is around 1300 nm. The SR-THG study was combined with an analysis of the self-absorption effects of pumping and of third-harmonic radiation; based on these results, we put forward a hypothesis that the THG action spectrum is influenced more by the ability of the material to self-absorb the third harmonic rather than by the extent of self-absorption of the pumping radiation. Apart from investigations of NLO properties, we have explored coordination and particularly the supramolecular interactions that build up the 2-Cl CP. Despite the tetrahedral, spatial shape of the ligand L, CP 2-Cl has a two-dimensional net. The structure was found to be strongly supported by O-HCl hydrogen bonds, since each CoCl42- complex anion is an acceptor of eight of such interactions within a distorted square grid layer of cobalt(ii) ions. While coordination and hydrogen-bonded nets are both featuring the sql topology when treated separately, the consideration of both of them as topological paths yields a trinodal 4,4,6-connected net, described by the point symbol (42·84)(45·6)2(46·66·83)2. SR-THG and structural studies of 2-Cl have been also supported by far- and mid-infrared spectroscopy, UV-Vis-NIR solid state absorption analysis, thermogravimetry and preliminary magnetic characterization.
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Affiliation(s)
- J K Zaręba
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
| | - J Janczak
- Institute of Low Temperatures and Structure Research, Polish Academy of Sciences, 2 Okólna St, P.O. Box 1410, 50-950 Wrocław, Poland
| | - M Samoć
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
| | - M Nyk
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
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Carson I, Healy MR, Doidge ED, Love JB, Morrison CA, Tasker PA. Metal-binding motifs of alkyl and aryl phosphinates; versatile mono and polynucleating ligands. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.11.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zaręba JK, Białek MJ, Janczak J, Nyk M, Zoń J, Samoć M. Beyond Single-Wavelength SHG Measurements: Spectrally-Resolved SHG Studies of Tetraphosphonate Ester Coordination Polymers. Inorg Chem 2015; 54:10568-75. [DOI: 10.1021/acs.inorgchem.5b01939] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Michał J. Białek
- Department of Chemistry, University of Wrocław, F. Joliot-Curie
14, 50-383 Wrocław, Poland
| | - Jan Janczak
- Institute of Low Temperature and Structural
Research, Polish Academy of Sciences, Okólna 2, P.O. Box 1410, 50-950 Wrocław, Poland
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Wałęsa-Chorab M, Gorczyński A, Kubicki M, Korabik M, Patroniak V. Mono-, di- and trinuclear complexes of bis(terpyridine) ligand: Synthesis, crystal structures and magnetic properties. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.02.054] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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