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Handzlik G, Magott M, Arczyński M, Sheveleva AM, Tuna F, Sarewicz M, Osyczka A, Rams M, Vieru V, Chibotaru LF, Pinkowicz D. Magnetization Dynamics and Coherent Spin Manipulation of a Propeller Gd(III) Complex with the Smallest Helicene Ligand. J Phys Chem Lett 2020; 11:1508-1515. [PMID: 31994400 PMCID: PMC7497647 DOI: 10.1021/acs.jpclett.9b03275] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 01/29/2020] [Indexed: 06/10/2023]
Abstract
A homoleptic gadolinium(III) complex with the smallest helicene-type ligand, 1,10-phenanthroline-N,N'-dioxide (phendo) [Gd(phendo)4](NO3)3·xMeOH (phendo = 1,10-phenanthroline-N,N'-dioxide, MeOH = methanol), shows slow relaxation of the magnetization characteristic for Single Ion Magnets (SIM), despite negligible magnetic anisotropy, confirmed by ab initio calculations. Solid state dilution magnetic and EPR studies reveal that the magnetization dynamics of the [Gd(phendo)4]3+ cation is controlled mainly by a Raman process. Pulsed EPR experiments demonstrate long phase memory times (up to 2.7 μs at 5 K), enabling the detection of Rabi oscillations at 20 K, which confirms coherent control of its spin state.
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Affiliation(s)
- Gabriela Handzlik
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Michał Magott
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Mirosław Arczyński
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Alena M. Sheveleva
- School
of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Floriana Tuna
- School
of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Marcin Sarewicz
- Department
of Molecular Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Artur Osyczka
- Department
of Molecular Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Michał Rams
- Marian
Smoluchowski Institute of Physics, Jagiellonian
University, Łojasiewicza
11, 30-348 Kraków, Poland
| | - Veacheslav Vieru
- Theory and
Nanomaterials Group, Katholieke Universiteit
Leuven, Celestijnenlaan
200F, 3001 Leuven, Belgium
| | - Liviu F. Chibotaru
- Theory and
Nanomaterials Group, Katholieke Universiteit
Leuven, Celestijnenlaan
200F, 3001 Leuven, Belgium
| | - Dawid Pinkowicz
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
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Handzlik G, Magott M, Arczyński M, Sheveleva AM, Tuna F, Baran S, Pinkowicz D. Identical anomalous Raman relaxation exponent in a family of single ion magnets: towards reliable Raman relaxation determination? Dalton Trans 2020; 49:11942-11949. [DOI: 10.1039/d0dt02439b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The results described herein suggest that the exponent n for the temperature dependence of the Raman relaxation process in the series of solid-state diluted isostructural LnIII SIMs should be identical.
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Affiliation(s)
| | - Michał Magott
- Faculty of Chemistry
- Jagiellonian University
- 30-387 Kraków
- Poland
| | | | - Alena M. Sheveleva
- Department of Chemistry and Photon Science Institute
- The University of Manchester
- Manchester M13 9PL
- UK
| | - Floriana Tuna
- Department of Chemistry and Photon Science Institute
- The University of Manchester
- Manchester M13 9PL
- UK
| | - Stanisław Baran
- Marian Smoluchowski Institute of Physics
- Jagiellonian University
- 30-348 Kraków
- Poland
| | - Dawid Pinkowicz
- Faculty of Chemistry
- Jagiellonian University
- 30-387 Kraków
- Poland
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Leben L, Schaub E, Näther C, Herges R. Crystal structure of (diethyl ether-κ O)[5,10,15,20-tetra-kis-(2-iso-thio-cyanato-phen-yl)porphyrinato-κ 4 N]zinc diethyl ether solvate. Acta Crystallogr E Crystallogr Commun 2018; 74:1609-1612. [PMID: 30443391 PMCID: PMC6218912 DOI: 10.1107/s2056989018014238] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 10/08/2018] [Indexed: 12/03/2022]
Abstract
The crystal structure of the title compound, [Zn(C48H24N8S4)(C4H10O)]·C4H10O, consists of discrete porphyrin complexes that are located on a twofold rotation axis. The ZnII cation is fivefold coordinated by four N atoms of the porphyrin moiety and one O atom of a diethyl ether mol-ecule in a slightly distorted square-pyramidal environment with the diethyl ether mol-ecule in the apical position. The porphyrin backbone is nearly planar with the metal cation slightly shifted out of the plane towards the coordinating diethyl ether mol-ecule. All four iso-thio-cyanato groups of the phenyl substituents at the meso-positions face the same side of the porphyrin, as is characteristic for picket fence porphyrins. In the crystal structure, the discrete porphyrin complexes are arranged in such a way that cavities are formed in which additional diethyl ether solvate mol-ecules are located around a twofold rotation axis. The O atom of the solvent mol-ecule is not positioned exactly on the twofold rotation axis, thus making the whole mol-ecule equally disordered over two symmetry-related positions.
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Affiliation(s)
- Lisa Leben
- Institut für Organische Chemie, Universität Kiel, Otto-Hahn-Platz 4, 24118, Kiel, Germany
| | - Eike Schaub
- Institut für Organische Chemie, Universität Kiel, Otto-Hahn-Platz 4, 24118, Kiel, Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Universität Kiel, Otto-Hahn-Platz 6/7, 24118, Kiel, Germany
| | - Rainer Herges
- Institut für Organische Chemie, Universität Kiel, Otto-Hahn-Platz 4, 24118, Kiel, Germany
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