1
|
Peets DC, Avdeev M, Rahn MC, Pabst F, Granovsky S, Stötzer M, Inosov DS. Crystal Growth, Structure, and Noninteracting Quantum Spins in Cyanochroite, K 2Cu(SO 4) 2·6H 2O. ACS OMEGA 2022; 7:5139-5145. [PMID: 35187329 PMCID: PMC8851620 DOI: 10.1021/acsomega.1c06143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 01/14/2022] [Indexed: 06/14/2023]
Abstract
The rare mineral cyanochroite, K2Cu(SO4)2·6H2O, features isolated Cu2+ ions in distorted octahedral coordination, linked via a hydrogen-bond network. We have grown single crystals of cyanochroite as large as ∼0.5 cm3 and investigated structural and magnetic aspects of this material. The positions of hydrogen atoms deviate significantly from those reported previously based on X-ray diffraction data, whereas the magnetic response is fully consistent with free Cu2+ spins. The structure is not changed by deuteration. Density functional theory calculations support our refined hydrogen positions.
Collapse
Affiliation(s)
- Darren C. Peets
- Institut
für Festkörper- und Materialphysik, Technische Universität Dresden, 01069 Dresden, Germany
| | - Maxim Avdeev
- Australian
Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia
- School
of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Marein C. Rahn
- Institut
für Festkörper- und Materialphysik, Technische Universität Dresden, 01069 Dresden, Germany
| | - Falk Pabst
- Anorganische
Chemie II, Technische Universität
Dresden, 01069 Dresden, Germany
| | - Sergey Granovsky
- Institut
für Festkörper- und Materialphysik, Technische Universität Dresden, 01069 Dresden, Germany
- Faculty
of Physics, M.V. Lomonossow Moscow State
University, Moscow 119991, Russia
| | - Markus Stötzer
- Anorganische
Chemie I, Technische Universität
Dresden, 01069 Dresden, Germany
| | - Dmytro S. Inosov
- Institut
für Festkörper- und Materialphysik, Technische Universität Dresden, 01069 Dresden, Germany
- Würzburg-Dresden
Cluster of Excellence on Complexity and Topology in Quantum Matter−ct.qmat, Technische Universität Dresden, 01069 Dresden, Germany
| |
Collapse
|
2
|
Ibrahim MA, Boeré RT. The copper sulfate hydration cycle. Crystal structures of CuSO 4 (Chalcocyanite), CuSO 4·H 2O (Poitevinite), CuSO 4·3H 2O (Bonattite) and CuSO 4·5H 2O (Chalcanthite) at low temperature using non-spherical atomic scattering factors. NEW J CHEM 2022. [DOI: 10.1039/d2nj00169a] [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
Sky blue CuSO4·3H2O is the midpoint of the copper sulfate hydration cycle. The progression from colourless CuSO4 to bright blue CuSO4·5H2O is intimately linked to the relative number of sulfato versus aqua ligands coordinated to copper.
Collapse
Affiliation(s)
- Mukaila A. Ibrahim
- Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, Canada
- The Canadian Centre for Research in Advanced Fluorine Technologies (C-CRAFT), University of Lethbridge, Lethbridge, Canada
| | - René T. Boeré
- Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, Canada
- The Canadian Centre for Research in Advanced Fluorine Technologies (C-CRAFT), University of Lethbridge, Lethbridge, Canada
| |
Collapse
|
3
|
Colaneri MJ, Vitali J. Effect of the Lattice Field on the Electronic Structure and Dynamics of Copper-Hexahydrate in Tutton Salts. J Phys Chem A 2021; 125:3268-3278. [PMID: 33861605 DOI: 10.1021/acs.jpca.1c00074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Previous structural and electron paramagnetic resonance (EPR) results are combined with new theoretical chemistry calculations on a series of copper-containing Tutton salts to investigate the influence of the host crystal electric field on the copper unpaired wave function and dynamics. Density functional theory (DFT) computations were performed on clusters centered on the host structure metal-hexahydrate complex to provide a model of atomic charges, which in turn were used to determine the electric fields and potentials at points along coordinate bonds of the complex. A significantly higher electric potential at the metal-water bonds is found for those Tutton salt systems having a greater copper EPR temperature dependency. Such a dependency has long been interpreted to arise from the averaging of tensor coupling parameters of the copper-hexahydrate complex due to a dynamic Jahn-Teller effect. However, the correlation found here reinforces a recent view that the coupling of the copper complex to the surrounding crystal lattice is the major determinant of these dynamics. The lattice potentials lack any significant temperature dependency and thus do not appear to be responsible for changes in the EPR patterns. A trend also appears between unbalanced spin in the compressed d-orbital lobe of the unpaired wave function and the magnitude of the potential. Hence, the lattice field is an important factor in defining both the electronic and dynamic characteristics of the copper-hexahydrate complex in these systems.
Collapse
Affiliation(s)
- Michael J Colaneri
- Department of Chemistry and Physics, State University of New York at Old Westbury, Old Westbury, New York 11568, United States
| | - Jacqueline Vitali
- Department of Physics and Department of Biological, Geological and Environmental Sciences, Cleveland State University, Cleveland, Ohio 44115, United States
| |
Collapse
|
4
|
Colaneri MJ, Teat SJ, Vitali J. Electron Paramagnetic Resonance Characteristics and Crystal Structure of a Tutton Salt Analogue: Copper-Doped Cadmium Creatininium Sulfate. J Phys Chem A 2020; 124:2242-2252. [PMID: 32078331 DOI: 10.1021/acs.jpca.0c00004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Electron paramagnetic resonance and crystallographic studies on copper-doped cadmium creatininium sulfate (CdCrnS) were undertaken to study the characteristics of a copper-hexahydrate complex in an organic analogue of Tutton's salt. X-ray diffraction experiments determined the crystal structure of CdCrnS at both 100 and 298 K. CdCrnS, like Tutton salt, crystallizes in the monoclinic space group P21/n. The unit cell contains two cadmium hexahydrate complexes, four creatininium ions, four sulfates, and four additional solvation waters. Both crystallography and EPR find that the doped copper replaces the cadmium in the structure. Single-crystal EPR measurements at room temperature determined the g and copper hyperfine (ACu) tensors (principal values: g = 2.437, 2.134, and 2.080 and ACu = -327, -84.8, and 7.33 MHz). EPR spectra of the powder at room temperature gave g = 2.448, 2.125, and 2.085 and ACu = -315, -75.0, and 35.0 MHz and at 110 K gave g = 2.462, 2.116, and 2.077 and ACu = -340, -30.0, and 35.0 MHz. The room-temperature tensors are close to the "rigid lattice limit" values found in copper-doped Tutton salts but with a higher gmin and weaker ACux coupling than average. A small but measurable temperature dependency of the tensors indicated the presence of a dynamic Jahn-Teller (JT) effect. In addition, the EPR line width changed dramatically with temperature, which is like that found in all copper-doped Tutton crystals. Utilizing the model of Silver-Getz for the g-value variation gave an estimate for the energy difference (δ12 = 640 cm-1) between the ground and next highest JT configurations. An empirical correlation appears to exist between δ12 and gmin and ACux for the copper hexahydrates studied in similar crystals. This suggests a relationship between the amount of unpaired spins in the copper d-orbital x lobe and the gap between wells of the adiabatic potential surface.
Collapse
Affiliation(s)
- Michael J Colaneri
- Department of Chemistry and Physics, State University of New York at Old Westbury, Old Westbury, New York 11568, United States
| | - Simon J Teat
- Lawrence Berkeley National Laboratory, 1 Cyclotron Road MS 15RO317, Berkeley, California 94720, United States
| | - Jacqueline Vitali
- Department of Physics and Department of Biological, Geological and Environmental Sciences, Cleveland State University, Cleveland, Ohio 44115, United States
| |
Collapse
|
5
|
Colaneri MJ, Vitali J. Probing Axial Water Bound to Copper in Tutton Salt Using Single Crystal 17O-ESEEM Spectroscopy. J Phys Chem A 2018; 122:6214-6224. [PMID: 29989412 DOI: 10.1021/acs.jpca.8b04075] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Electron spin-echo envelope modulation (ESEEM) signals attributed to axial water bound to Cu2+ have been detected and analyzed in Cu(II)-doped 17O-water-enriched potassium zinc sulfate hexahydrate (Tutton salt) crystals. The magnetic field orientation dependences of low frequency modulations were measured to fit hyperfine and quadrupole coupling tensors of a 17O ( I = 5/2) nucleus. The hyperfine tensor ( A xx, A yy, A zz: 0.13, 0.23, -3.81 MHz) exhibits almost axial symmetry with the largest value directed normal to the metal equatorial plane in the host structure. Comparisons with quantum chemical calculations position this nucleus about 2.3 Å from the copper. The isotropic coupling (-1.15 MHz) is small and reflects the weak axial water interaction with a dx2-y2 unshared orbital of copper. The 17O-water quadrupole interaction parameters ( e2 qQ/ h = 6.4 MHz and η = 0.93) are close to the average of those found in a variety of solid hydrates. In addition, the coupling tensor directions correlate very closely with the O8 water geometry, with the maximum quadrupole direction 3° from the water plane normal, and its minimum coupling about 2° from the H-H direction. In almost all previous magnetic resonance 17O-water studies, the quadrupole tensor orientation was based on theoretical considerations. This work represents one of the few experimental confirmations of its principal axis frame. When Cu2+ dopes into the Tutton salt, a Jahn-Teller distortion interchanges the relative long and intermediate metal O7 and O8 bond lengths of the zinc host. Therefore, only those unit cells containing the impurity conform to the pure copper Tutton structure. This study provides further support for this model. Moreover, coupling interactions from distant H217O such as in the present case have important implications in studies of copper enzymes and proteins where substrates have been proposed to displace weakly bound water in the active site.
Collapse
Affiliation(s)
- Michael J Colaneri
- Department of Chemistry and Physics , State University of New York at Old Westbury , Old Westbury , New York 11568 , United States
| | - Jacqueline Vitali
- Department of Physics and Department of Biological, Geological and Environmental Sciences , Cleveland State University , Cleveland , Ohio 44115 , United States
| |
Collapse
|
6
|
Tumanov SV, Veber SL, Greatorex S, Halcrow MA, Fedin MV. Interplay between Dopant Species and a Spin-Crossover Host Lattice during Light-Induced Excited-Spin-State Trapping Probed by Electron Paramagnetic Resonance Spectroscopy. Inorg Chem 2018; 57:8709-8713. [DOI: 10.1021/acs.inorgchem.8b01096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sergey V. Tumanov
- International Tomography Center of the Siberian Branch of the Russian Academy of Sciences, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia
| | - Sergey L. Veber
- International Tomography Center of the Siberian Branch of the Russian Academy of Sciences, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia
| | - Sam Greatorex
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Malcolm A. Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Matvey V. Fedin
- International Tomography Center of the Siberian Branch of the Russian Academy of Sciences, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia
| |
Collapse
|
7
|
Lechuga‐Islas V, Tlahuext H, Falcón‐León MP, Sánchez‐De Jesús F, Moo‐Puc RE, Chale‐Dzul JB, Tapia‐Benavides AR, Tlahuextl M. Regulating Noncovalent Interactions in Amino‐Amide–Copper Complexes. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701332] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Víctor Lechuga‐Islas
- Chemistry Department Universidad Autónoma del Estado de Hidalgo 4.5, M. de la Reforma 42184 Pachuca‐Tulacingo Hgo México
| | - Hugo Tlahuext
- Centro de Investigaciones Químicas Universidad Autónoma del Estado de Morelos Av. Universidad 1001 62100 Cuernavaca Mor México
| | - Martha P. Falcón‐León
- Chemistry Department Universidad Autónoma del Estado de Hidalgo 4.5, M. de la Reforma 42184 Pachuca‐Tulacingo Hgo México
| | - Félix Sánchez‐De Jesús
- Área Académica de Ciencias de la Tierra y Materiales Universidad Autónoma del Estado de Hidalgo 4.5, M. de la Reforma 42184 Pachuca‐Tulancingo Hgo México
| | - Rosa E. Moo‐Puc
- Unidad de Investigación Médica Yucatán Instituto Mexicano del Seguro Social Calle 41439 97150 Mérida Yuc México
| | - Juan B. Chale‐Dzul
- Laboratorio de Vigilancia e Investigación Epidemiológica Instituto Mexicano del Seguro Social Calle 41439 97150 Mérida Yuc México
| | - Antonio R. Tapia‐Benavides
- Chemistry Department Universidad Autónoma del Estado de Hidalgo 4.5, M. de la Reforma 42184 Pachuca‐Tulacingo Hgo México
| | - Margarita Tlahuextl
- Chemistry Department Universidad Autónoma del Estado de Hidalgo 4.5, M. de la Reforma 42184 Pachuca‐Tulacingo Hgo México
| |
Collapse
|
8
|
Metallosurfactants C n –Cu–C n : vesicle formation and its drug-controlled release properties. Colloid Polym Sci 2016. [DOI: 10.1007/s00396-016-3841-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
9
|
Hall N, Orio M, Gennari M, Wills C, Molton F, Philouze C, Jameson GB, Halcrow MA, Blackman AG, Duboc C. Multifrequency cw-EPR and DFT Studies of an Apparent Compressed Octahedral Cu(II) Complex. Inorg Chem 2016; 55:1497-504. [DOI: 10.1021/acs.inorgchem.5b02287] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nikita Hall
- Univ. Grenoble Alpes, CNRS
UMR 5250, DCM, F-38000 Grenoble, France
| | - Maylis Orio
- Institut des Sciences
Moléculaires de Marseille, Aix Marseille Université, CNRS, Centrale Marseille, ISM2 UMR 7313, 13397 Marseille, France
| | - Marcello Gennari
- Univ. Grenoble Alpes, CNRS
UMR 5250, DCM, F-38000 Grenoble, France
| | | | - Florian Molton
- Univ. Grenoble Alpes, CNRS
UMR 5250, DCM, F-38000 Grenoble, France
| | | | - Geoffrey B. Jameson
- Institute of Fundamental Sciences and the MacDiarmid Institute for
Advanced Materials and Nanotechnology, Masssey University, Private Bag
11222, Palmerston North 4442, New Zealand
| | - Malcolm A. Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds UK LS2 9JT, United Kingdom
| | - Allan G. Blackman
- School
of Applied Sciences, Auckland University of Technology, Private
Bag 92006, Auckland 1142, New Zealand
| | - Carole Duboc
- Univ. Grenoble Alpes, CNRS
UMR 5250, DCM, F-38000 Grenoble, France
| |
Collapse
|
10
|
Babu R, Bhargavi G, Rajasekharan MV. Polyhalide Ions (Br
8
2–
and I
2
Br
6
2–
) and Chains (···Br
3
–
···Br
2
··· and ···IBr
4
–
···) Stabilised by Using Cu(dafone)
3
2+
as Counter Ion (dafone = 4,5‐Diazafluoren‐9‐one). Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500370] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ramavath Babu
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India, http://chemistry.uohyd.ac.in/~mvr
| | - Govindugari Bhargavi
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India, http://chemistry.uohyd.ac.in/~mvr
| | - Melath V. Rajasekharan
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India, http://chemistry.uohyd.ac.in/~mvr
| |
Collapse
|
11
|
Meyer A, Schnakenburg G, Glaum R, Schiemann O. (Bis(terpyridine))copper(II) Tetraphenylborate: A Complex Example for the Jahn–Teller Effect. Inorg Chem 2015; 54:8456-64. [DOI: 10.1021/acs.inorgchem.5b01157] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreas Meyer
- Institute
of Physical and Theoretical Chemistry, University of Bonn, Wegelerstr.
12, Bonn, Germany
| | - Gregor Schnakenburg
- Institute of Inorganic Chemistry, University of Bonn, Gerhard-Domagk-Str.
1, Bonn, Germany
| | - Robert Glaum
- Institute of Inorganic Chemistry, University of Bonn, Gerhard-Domagk-Str.
1, Bonn, Germany
| | - Olav Schiemann
- Institute
of Physical and Theoretical Chemistry, University of Bonn, Wegelerstr.
12, Bonn, Germany
| |
Collapse
|
12
|
Fedin MV, Veber SL, Bagryanskaya EG, Romanenko GV, Ovcharenko VI. Spatial distribution of phases during gradual magnetostructural transitions in copper(ii)–nitroxide based molecular magnets. Dalton Trans 2015; 44:18823-30. [DOI: 10.1039/c5dt03441h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A thorough analysis of EPR and XRD data led to conclusions on the spatial distribution of phases in copper–nitroxide molecular magnets.
Collapse
Affiliation(s)
- Matvey V. Fedin
- International Tomography Center SB RAS
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | - Sergey L. Veber
- International Tomography Center SB RAS
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | - Elena G. Bagryanskaya
- Novosibirsk State University
- Novosibirsk
- Russia
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk
| | | | | |
Collapse
|
13
|
Iyer AK, Roy S, Haridasan R, Sarkar S, Peter SC. Ligand mediated valence fluctuation of copper in new hybrid materials constructed from decavanadate and a Cu(1,10-phenanthroline) complex. Dalton Trans 2014; 43:2153-60. [DOI: 10.1039/c3dt52484a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
14
|
Simmons CJ, Stratemeier H, Hitchman MA, Riley MJ. Influence of lattice interactions on the Jahn-Teller distortion of the [Cu(H2O)6]2+ ion: dependence of the crystal structure of K2(x)Rb(2-2x)[Cu(H2O)6](SeO4)2 upon the K/Rb ratio. Inorg Chem 2013; 52:10481-99. [PMID: 24011251 DOI: 10.1021/ic401385f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The temperature dependence of the structures of a wide range of mixed-cation Tutton's salts of general formula K2(x)Rb(2-2x)[Cu(H2O)6](SeO4)2 has been determined over the temperature range 90 to 320 K. Crystals with a high proportion of potassium adopt a different structure (form B) from those with a low ratio (form A). In both forms, the [Cu(H2O)6](2+) ion has an orthorhombically distorted tetragonally elongated coordination geometry, but the long and intermediate bonds occur with a different pair of water molecules in form A compared with form B. The alkali metal is surrounded by seven close oxygen atoms in form B but eight oxygen atoms in form A, and this difference in coordination number is associated with the change in the Cu-O bond distances via the hydrogen-bonding network. For crystals with between 32 and ∼41% potassium, a relatively sharp change from form B to A occurs on cooling, and the temperature at which this occurs increases approximately linearly as the proportion of potassium falls. For the whole range of mixed crystals, the bond lengths have been determined as a function of temperature. The data have been interpreted as a thermal equilibrium of the two structural forms of the [Cu(H2O)6](2+) ion that develops gradually as the temperature increases, with this becoming more pronounced as the proportions of the two cations become more similar. The temperature dependence of the bond lengths in this thermal equilibrium has been analyzed using a model in which the Jahn-Teller potential surface of the [Cu(H2O)6](2+) ion is perturbed by lattice strain interactions. The magnitude and sign of the orthorhombic component of this strain interaction depends upon the proportion of potassium to rubidium ions in the structure.
Collapse
Affiliation(s)
- Charles J Simmons
- Division of Natural Sciences, University of Hawaii at Hilo , Hilo, Hawaii 96720-4091, United States
| | | | | | | |
Collapse
|
15
|
Fedin MV, Zhilina EF, Chizhov DL, Apolonskaya IA, Aleksandrov GG, Kiskin MA, Sidorov AA, Bogomyakov AS, Romanenko GV, Eremenko IL, Novotortsev VM, Charushin VN. Temperature-dependent zero-field splitting in a copper(ii) dimer studied by EPR. Dalton Trans 2013; 42:4513-21. [DOI: 10.1039/c2dt32697c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Matvey V Fedin
- International Tomography Center SB RAS, 630090 Novosibirsk, Russia.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Halcrow MA. Jahn–Teller distortions in transition metal compounds, and their importance in functional molecular and inorganic materials. Chem Soc Rev 2013; 42:1784-95. [DOI: 10.1039/c2cs35253b] [Citation(s) in RCA: 285] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
17
|
Fedin MV, Maryunina KY, Sagdeev RZ, Ovcharenko VI, Bagryanskaya EG. Self-Decelerating Relaxation of the Light-Induced Spin States in Molecular Magnets Cu(hfac)2LR Studied by Electron Paramagnetic Resonance. Inorg Chem 2011; 51:709-17. [DOI: 10.1021/ic202248v] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matvey V. Fedin
- International Tomography Center SB RAS, Institutskaya
str. 3a, 630090, Novosibirsk, Russia
| | - Ksenia Yu. Maryunina
- International Tomography Center SB RAS, Institutskaya
str. 3a, 630090, Novosibirsk, Russia
| | - Renad Z. Sagdeev
- International Tomography Center SB RAS, Institutskaya
str. 3a, 630090, Novosibirsk, Russia
| | - Victor I. Ovcharenko
- International Tomography Center SB RAS, Institutskaya
str. 3a, 630090, Novosibirsk, Russia
| | - Elena G. Bagryanskaya
- International Tomography Center SB RAS, Institutskaya
str. 3a, 630090, Novosibirsk, Russia
| |
Collapse
|
18
|
Veber SL, Fedin MV, Maryunina KY, Potapov A, Goldfarb D, Reijerse E, Lubitz W, Sagdeev RZ, Ovcharenko VI, Bagryanskaya EG. Temperature-Dependent Exchange Interaction in Molecular Magnets Cu(hfac)2LR Studied by EPR: Methodology and Interpretations. Inorg Chem 2011; 50:10204-12. [DOI: 10.1021/ic2011869] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sergey L. Veber
- International Tomography Center SB RAS, 630090 Novosibirsk, Russia
| | - Matvey V. Fedin
- International Tomography Center SB RAS, 630090 Novosibirsk, Russia
| | | | - Alexey Potapov
- Department of Chemical Physics, The Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Daniella Goldfarb
- Department of Chemical Physics, The Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Edward Reijerse
- Max-Planck-Institut für Bioanorganische Chemie, 45470 Mülheim/Ruhr, Germany
| | - Wolfgang Lubitz
- Max-Planck-Institut für Bioanorganische Chemie, 45470 Mülheim/Ruhr, Germany
| | - Renad Z. Sagdeev
- International Tomography Center SB RAS, 630090 Novosibirsk, Russia
| | | | | |
Collapse
|
19
|
Simmons CJ, Stratemeier H, Hitchman MA, Reinen D, Masters VM, Riley MJ. Temperature Dependence of the Crystal Structure and g-Values of trans-Diaquabis(methoxyacetato)Copper(II): Evidence for a Thermal Equilibrium Between Complexes with Tetragonally Elongated and Compressed Geometries. Inorg Chem 2011; 50:4900-16. [DOI: 10.1021/ic200554f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Charles J. Simmons
- Division of Natural Sciences, University of Hawaii at Hilo, Hilo, Hawaii 96720-4091, United States
| | - Horst Stratemeier
- School of Chemistry, University of Tasmania, Box 252-75 Hobart, Tasmania 7001, Australia
| | - Michael A. Hitchman
- School of Chemistry, University of Tasmania, Box 252-75 Hobart, Tasmania 7001, Australia
| | - Dirk Reinen
- Fachbereich Chemie der Universität Marburg, Universität Marburg, Hans-Meerwein Strasse, D-3550 Marburg, Germany
| | - Vanessa M. Masters
- School of Chemistry and Molecular Biosciences, University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Mark J. Riley
- School of Chemistry and Molecular Biosciences, University of Queensland, St. Lucia, Queensland 4072, Australia
| |
Collapse
|
20
|
Caballero AB, Rodríguez-Diéguez A, Lezama L, Barea E, Salas JM. Structural and magnetic properties of three novel complexes with the versatile ligand 5-methyl-1,2,4-triazolo[1,5-a]pyrimidin-7(4H)-one. Dalton Trans 2011; 40:5180-7. [DOI: 10.1039/c0dt01416h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
21
|
Suárez-Varela J, Mota AJ, Aouryaghal H, Cano J, Rodríguez-Diéguez A, Luneau D, Colacio E. Anion Influence on the Structure and Magnetic Properties of a Series of Multidimensional Pyrimidine-2-carboxylato-Bridged Copper(II) Complexes. Inorg Chem 2008; 47:8143-58. [PMID: 18698761 DOI: 10.1021/ic800625w] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- José Suárez-Varela
- Departamento de Química Inorgánica, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada, Spain, Departement de Chimie, Université Abdelmalek Essaadi, Faculté des Sciences, P.O. 2121, Tétouan, Marocco, Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, Av. Diagonal 647, 08027 Barcelona, Spain, and Laboratoire des Multimateriaux et Interfaces, (UMR 5615), Université ClaudeBernard Lyon-1, 69622 Villeurbanne cedex, France
| | - Antonio J. Mota
- Departamento de Química Inorgánica, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada, Spain, Departement de Chimie, Université Abdelmalek Essaadi, Faculté des Sciences, P.O. 2121, Tétouan, Marocco, Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, Av. Diagonal 647, 08027 Barcelona, Spain, and Laboratoire des Multimateriaux et Interfaces, (UMR 5615), Université ClaudeBernard Lyon-1, 69622 Villeurbanne cedex, France
| | - Hakima Aouryaghal
- Departamento de Química Inorgánica, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada, Spain, Departement de Chimie, Université Abdelmalek Essaadi, Faculté des Sciences, P.O. 2121, Tétouan, Marocco, Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, Av. Diagonal 647, 08027 Barcelona, Spain, and Laboratoire des Multimateriaux et Interfaces, (UMR 5615), Université ClaudeBernard Lyon-1, 69622 Villeurbanne cedex, France
| | - Joan Cano
- Departamento de Química Inorgánica, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada, Spain, Departement de Chimie, Université Abdelmalek Essaadi, Faculté des Sciences, P.O. 2121, Tétouan, Marocco, Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, Av. Diagonal 647, 08027 Barcelona, Spain, and Laboratoire des Multimateriaux et Interfaces, (UMR 5615), Université ClaudeBernard Lyon-1, 69622 Villeurbanne cedex, France
| | - A. Rodríguez-Diéguez
- Departamento de Química Inorgánica, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada, Spain, Departement de Chimie, Université Abdelmalek Essaadi, Faculté des Sciences, P.O. 2121, Tétouan, Marocco, Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, Av. Diagonal 647, 08027 Barcelona, Spain, and Laboratoire des Multimateriaux et Interfaces, (UMR 5615), Université ClaudeBernard Lyon-1, 69622 Villeurbanne cedex, France
| | - Dominique Luneau
- Departamento de Química Inorgánica, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada, Spain, Departement de Chimie, Université Abdelmalek Essaadi, Faculté des Sciences, P.O. 2121, Tétouan, Marocco, Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, Av. Diagonal 647, 08027 Barcelona, Spain, and Laboratoire des Multimateriaux et Interfaces, (UMR 5615), Université ClaudeBernard Lyon-1, 69622 Villeurbanne cedex, France
| | - Enrique Colacio
- Departamento de Química Inorgánica, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada, Spain, Departement de Chimie, Université Abdelmalek Essaadi, Faculté des Sciences, P.O. 2121, Tétouan, Marocco, Departament de Química Inorgànica and Institut de Recerca de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, Av. Diagonal 647, 08027 Barcelona, Spain, and Laboratoire des Multimateriaux et Interfaces, (UMR 5615), Université ClaudeBernard Lyon-1, 69622 Villeurbanne cedex, France
| |
Collapse
|
22
|
Hadler KS, Kilmartin JR, Hanson GR, Hitchman MA, Simmons CJ, Riley MJ. Vibronic Effects in Cu(II)-Doped Ba2Zn(HCO2)6·4H2O. Inorg Chem 2008; 47:8188-96. [DOI: 10.1021/ic8007206] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kieran S. Hadler
- School of Molecular and Microbial Science, University of Queensland, St. Lucia, QLD, 4072, Australia, Centre for Magnetic Resonance, University of Queensland, St. Lucia, QLD, 4072, Australia, School of Chemistry, University of Tasmania, Box 252-75 Hobart, TAS 7001, Australia, and Division of Natural Sciences, University of Hawaii, Hilo, Hawaii 96720-4091
| | - James R. Kilmartin
- School of Molecular and Microbial Science, University of Queensland, St. Lucia, QLD, 4072, Australia, Centre for Magnetic Resonance, University of Queensland, St. Lucia, QLD, 4072, Australia, School of Chemistry, University of Tasmania, Box 252-75 Hobart, TAS 7001, Australia, and Division of Natural Sciences, University of Hawaii, Hilo, Hawaii 96720-4091
| | - Graeme R. Hanson
- School of Molecular and Microbial Science, University of Queensland, St. Lucia, QLD, 4072, Australia, Centre for Magnetic Resonance, University of Queensland, St. Lucia, QLD, 4072, Australia, School of Chemistry, University of Tasmania, Box 252-75 Hobart, TAS 7001, Australia, and Division of Natural Sciences, University of Hawaii, Hilo, Hawaii 96720-4091
| | - Michael A. Hitchman
- School of Molecular and Microbial Science, University of Queensland, St. Lucia, QLD, 4072, Australia, Centre for Magnetic Resonance, University of Queensland, St. Lucia, QLD, 4072, Australia, School of Chemistry, University of Tasmania, Box 252-75 Hobart, TAS 7001, Australia, and Division of Natural Sciences, University of Hawaii, Hilo, Hawaii 96720-4091
| | - Charles J. Simmons
- School of Molecular and Microbial Science, University of Queensland, St. Lucia, QLD, 4072, Australia, Centre for Magnetic Resonance, University of Queensland, St. Lucia, QLD, 4072, Australia, School of Chemistry, University of Tasmania, Box 252-75 Hobart, TAS 7001, Australia, and Division of Natural Sciences, University of Hawaii, Hilo, Hawaii 96720-4091
| | - Mark J. Riley
- School of Molecular and Microbial Science, University of Queensland, St. Lucia, QLD, 4072, Australia, Centre for Magnetic Resonance, University of Queensland, St. Lucia, QLD, 4072, Australia, School of Chemistry, University of Tasmania, Box 252-75 Hobart, TAS 7001, Australia, and Division of Natural Sciences, University of Hawaii, Hilo, Hawaii 96720-4091
| |
Collapse
|
23
|
Ceulemans A, Lijnen E. The Jahn–Teller Effect in Chemistry. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.1229] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
24
|
Hoffmann SK, Radczyk T. Complex motions of X-ray induced radicals in Tutton salt (NH4)2Zn(SO4)2·6H2O single crystals observed by EPR and ESEEM spectroscopy. Mol Phys 2006. [DOI: 10.1080/00268970600630900] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
25
|
Dobe C, Strässle T, Juranyi F, Tregenna-Piggott PLW. Pressure-Induced Switch of the Direction of the Unique Jahn−Teller Axis of the Chromium(II) Hexaqua Cation in the Deuterated Ammonium Chromium Tutton Salt. Inorg Chem 2006; 45:5066-72. [PMID: 16780328 DOI: 10.1021/ic060187g] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Inelastic neutron scattering (INS) spectra are presented for chromium(II) Tutton salts, as a function of the temperature and pressure. Transitions are observed between the levels of the 5Ag (Ci) ground term and the data modeled with a conventional S = 2 spin Hamiltonian. At 10 K and ambient pressure, the zero-field-splitting parameters of the ammonium salt, (ND4)2Cr(D2O)6(SO4)2, are determined as D = -2.431(4) cm(-1) and E = 0.091(4) cm(-1), evolving to D = -2.517(4) cm(-1) and E = 0.127(5) cm(-1) upon application of 7.5(1.0) kbar of quasi-hydrostatic pressure. By contrast, the change in the INS spectrum of the rubidium salt in this pressure range is comparitively minor. The results are interpreted using a 5Ee vibronic-coupling Hamiltonian, in which low-symmetry strain, perturbing the adiabatic potential-energy surface, is pressure-dependent. It is argued that, for the ammonium salt, the change with pressure of the anisotropic strain impinging upon the [Cr(D2O)6]2+ cation is sufficient to cause a switch of the long and intermediate Cr-OD2 bonds, with respect to the crystallographic axes.
Collapse
Affiliation(s)
- Christopher Dobe
- Laboratory for Neutron Scattering, ETH Zürich and Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | | | | | | |
Collapse
|
26
|
Perkins DF, Lindoy LF, McAuley A, Meehan GV, Turner P. Manganese(II), iron(II), cobalt(II), and copper(II) complexes of an extended inherently chiral tris-bipyridyl cage. Proc Natl Acad Sci U S A 2006; 103:532-7. [PMID: 16407129 PMCID: PMC1334659 DOI: 10.1073/pnas.0508539103] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Manganese(II), iron(II), cobalt(II), and copper(II) derivatives of two inherently chiral, Tris(bipyridyl) cages (L and L') of type [ML]-(PF(6))(2)(solvent)(n) and [FeL'](ClO(4))(2) are reported, where L is the hexa-tertiary butyl-substituted derivative of L'. These products were obtained by using the free cage and metal template procedures; the latter involved the reductive amination of the respective Tris-dialdehyde precursor complexes of iron(II), cobalt(II), or nickel(II). Electrochemical, EPR, and NMR studies have been used to probe the nature of the individual complexes. X-ray structures of the manganese(II), iron(II), and copper(II) complexes of L and the iron(II) complex of L' are presented; these are compared with the previously reported structures of the corresponding nickel(II) complex and metal-free cage (L). In each complex the metal cation occupies the cage's central cavity and is coordinated to six nitrogens from the three bipyridyl groups. The cations [MnL](2+) and [FeL](2+) are isostructural but both exhibit a different arrangement of the bound cage to that observed in the corresponding nickel(II) and copper(II) complexes. The latter have an exo-exo arrangement of the bridgehead nitrogen lone pairs, with the metal inducing a triple helical twist that extends approximately 22 A along the axial length of each complex. In contrast, [MnL](2+) and [FeL](2+) have their terminal nitrogen lone pairs directed endo, causing a significant change in the configuration of the bound ligand. In [FeL'](2+), the cage has both bridgehead nitrogen lone pairs orientated exo. Semiempirical calculations indicate that the observed endo-endo and exo-exo arrangements are of comparable energy.
Collapse
Affiliation(s)
- David F Perkins
- Centre for Heavy Metals Research, School of Chemistry, University of Sydney, Sydney NSW 2006, Australia
| | | | | | | | | |
Collapse
|
27
|
Simmons CJ, Stratemeier H, Hitchman MA, Riley MJ. Influence of Lattice Interactions on the Jahn−Teller Distortion of the [Cu(H2O)6]2+ Ion: Dependence of the Crystal Structure of K2[Cu(H2O)6](SO4)2x(SeO4)2-2x upon the Sulfate/Selenate Ratio. Inorg Chem 2006; 45:1021-31. [PMID: 16441109 DOI: 10.1021/ic050790j] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The temperature dependence of the structure of the mixed-anion Tutton salt K2[Cu(H2O)6](SO4)(2x)(SeO4)(2-2x) has been determined for crystals with 0, 17, 25, 68, 78, and 100% sulfate over the temperature range of 85-320 K. In every case, the [Cu(H2O)6]2+ ion adopts a tetragonally elongated coordination geometry with an orthorhombic distortion. However, for the compounds with 0, 17, and 25% sulfate, the long and intermediate bonds occur on a different pair of water molecules from those with 68, 78, and 100% sulfate. A thermal equilibrium between the two forms is observed for each crystal, with this developing more readily as the proportions of the two counterions become more similar. Attempts to prepare a crystal with approximately equal amounts of sulfate and selenate were unsuccessful. The temperature dependence of the bond lengths has been analyzed using a model in which the Jahn-Teller potential surface of the [Cu(H2O)6]2+ ion is perturbed by a lattice-strain interaction. The magnitude and sign of the orthorhombic component of this strain interaction depends on the proportion of sulfate to selenate. Significant deviations from Boltzmann statistics are observed for those crystals exhibiting a large temperature dependence of the average bond lengths, and this may be explained by cooperative interactions between neighboring complexes.
Collapse
Affiliation(s)
- Charles J Simmons
- Division of Natural Sciences, University of Hawaii, Hilo, Hawaii 96720-4091, USA.
| | | | | | | |
Collapse
|
28
|
Murphy B, Aljabri M, Ahmed AM, Murphy G, Hathaway BJ, Light ME, Geilbrich T, Hursthouse MB. Structural systematics of the [Cu(chelate)3][Y]2series. An interesting crystallographic structural insight involving vibronic coupling and the Jahn–Teller effect (JTE). The syntheses and low temperature crystal structures of tris(2,2′bipyridyl)copper(ii) tetraphenylborate and tris(2,2′bipyridyl)zinc(ii) tetraphenylborate. Dalton Trans 2006:357-67. [PMID: 16365650 DOI: 10.1039/b509070a] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The crystal structures of [Cu(bipy)(3)][BPh(4)](2), 1, and [Zn(bipy)(3)][BPh(4)](2), have been determined at low temperature. 1 and 2 are closely related, but are not isostructural. Both contain a two-dimensional supramolecular construct (SC) involving a sandwich structure. 1 has a six-coordinate CuN(6) chromophore with a regular elongated octahedral stereochemistry and rhombic in-plane bond lengths. The associated tetragonality value, T, of 1 is 0.8868. 2 involves a six-coordinate octahedral chromophore. Differences between 1 and 2 relate to the tendency of copper(II) complexes to undergo a Jahn-Teller (JT) distortion. The zinc(II) cation feels solely the host site strain, whereas the copper(II) cation also involves vibronic JT type coupling. The copper polyhedron geometry is characterized by both phenomena, with the vibronic interaction dominating. Scatter plot analysis involving the tris-chelate copper(II) series suggests that neither pure Q(theta) or Q(epsilon) components or the a(2u) mode operate in isolation over the entire series. All three operate in combination with varying quantifiable contributions, leading to distortion from the regular tetragonal octahedral stereochemistry.
Collapse
Affiliation(s)
- Brian Murphy
- Department of Chemistry, College of Science, United Arab Emirates University, Al Ain.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Simmons CJ, Stratemeier H, Hanson GR, Hitchman MA. Temperature Dependence of the Crystal Structure and g-Values of [(HC(Ph2PO)3)2Cu](ClO4)2·2H2O: Influence of Dynamic Jahn−Teller Coupling and Lattice Strain Interactions. Inorg Chem 2005; 44:2753-60. [PMID: 15819562 DOI: 10.1021/ic048604h] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The temperature dependence of the X-ray crystal structure and powder EPR spectrum of [(HC(Ph(2)PO)(3))(2)Cu](ClO(4))(2).2H(2)O is reported, and the structure at room temperature confirms that reported previously. Below approximately 100 K, the data imply a geometry with near elongated tetragonal symmetry for the [(HC(Ph(2)PO)(3))(2)Cu](2+) complex, but on warming the two higher Cu-O bond lengths and g-values progressively converge, and by 340 K the bond lengths correspond to a compressed tetragonal geometry. The data may be interpreted satisfactorily assuming an equilibrium among the energy levels of a Cu-O(6) polyhedron subjected to Jahn-Teller vibronic coupling and a lattice strain. However, agreement with the experiment is obtained only if the orthorhombic component of the lattice strain decreases to a negligible value as the temperature approaches 340 K.
Collapse
Affiliation(s)
- Charles J Simmons
- Division of Natural Sciences, University of Hawaii at Hilo, Hawaii 96720-4091, USA.
| | | | | | | |
Collapse
|
30
|
Dobe C, Noble C, Carver G, Tregenna-Piggott PLW, McIntyre GJ, Barra AL, Neels A, Janssen S, Juranyi F. Electronic and Molecular Structure of High-Spin d4 Complexes: Experimental and Theoretical Study of the [Cr(D2O)6]2+ Cation in Tutton's Salts. J Am Chem Soc 2004; 126:16639-52. [PMID: 15600370 DOI: 10.1021/ja046095c] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Variable-temperature spectroscopic and crystallographic studies on the chromium(II) Tutton's salts, (MI)2Cr(X2O)6(SO4)2, where MI = ND4+, Rb+, or Cs+, and X = H or D, are reported. Inelastic neutron scattering (INS) and multifrequency EPR experiments facilitate a rigorous definition of the ground-state electronic structure from 1.5 up to 296 K, which is unprecedented for a high-spin d4 complex. Modeling of the INS data using a conventional S = 2 spin Hamiltonian reveals a dramatic variation in the axial and rhombic zero-field-splitting parameters. For the ammonium salt, D and E are -2.454(3) and 0.087(3) cm(-1) at 10 K and -2.29(2) and 0.16(3) cm(-1) at 250 K, respectively. A temperature variation in the stereochemistry of the [Cr(D2O)6]2+ complex is also identified, with an apparent coalescence of the long and medium Cr-O bond lengths at temperatures above 150 K. The corresponding changes for the rubidium and cesium salts are notable, though less pronounced. The experimental quantities are interpreted using a 5Ee Jahn-Teller Hamiltonian, perturbed by anisotropic strain. It is shown that good agreement can be obtained only by employing a model in which the anisotropic strain is itself temperature dependent. A new theoretical approach for calculating variable-temperature EPR spectra of high-spin d4 complexes, developed within the 5Ee coupling model, is described. Differences between spin-Hamiltonian parameters determined by INS and EPR are consistent with those of the different time scales of the two techniques.
Collapse
Affiliation(s)
- Christopher Dobe
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3000, Bern 9, Switzerland
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Murugavel R, Sathiyendiran M, Pothiraja R, Walawalkar MG, Mallah T, Riviére E. Monomeric, Tetrameric, and Polymeric Copper Di-tert-butyl Phosphate Complexes Containing Pyridine Ancillary Ligands,. Inorg Chem 2003; 43:945-53. [PMID: 14753814 DOI: 10.1021/ic0349508] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of di-tert-butyl phosphate (((t)BuO)(2)P(O)(OH), dtbp-H) with copper acetate in the presence of pyridine (py) and 2,4,6-trimethylpyridine (collidine) has been investigated. Copper acetate reacts with dtbp-H in a reaction medium containing pyridine, DMSO, THF, and CH(3)OH to yield a one-dimensional polymeric complex [Cu(dtbp)(2)(py)(2)(mu-OH(2))](n) (1) as blue hollow crystalline tubes. The copper atoms in 1 are octahedral and are surrounded by two terminal phosphate ligands, two pyridine molecules, and two bridging water molecules. The mu-OH(2) ligands that are present along the elongated Jahn-Teller axis are responsible for the formation of the one-dimensional polymeric structure. Recrystallization of 1 in a DMSO/THF/CH(3)OH mixture results in the reorganization of the polymer and its conversion to a more stable tetranuclear copper cluster [Cu(4)(mu(3)-OH)(2)(dtbp)(6)(py)(2)] (2) in about 60% yield. The molecular structure of 2 is made up of a tetranuclear core [Cu(4)(mu(3)-OH)(2)] which is surrounded by six bidentate bridging dtbp ligands. While two of the copper atoms are pentacoordinate with a tbp geometry, the other two copper atoms exhibit a pseudooctahedral geometry with five normal Cu-O bonds and an elongated Cu-O linkage. The pentacoordinate copper centers bear an axial pyridine ligand. The short Cu.Cu nonbonded distances in the tetranuclear core of 2 lead to magnetic ordering at low temperature with an antiferromagnetic coupling at approximately 20 K (J(P) = -44 cm(-1), J(c) = -66 cm(-1), g = 2.25, and rho = 0.8%). When the reaction between di-tert-butyl phosphate (dtbp-H) and copper acetate was carried out in the presence of collidine, large dark-blue crystals of monomeric copper complex [Cu(dtbp)(2)(collidine)(2)] (3) formed as the only product. A single-crystal X-ray diffraction study of 3 reveals a slightly distorted square-planar geometry around the copper atom. Thermogravimetric analysis of 1-3 revealed a facile decomposition of the coordinated ligands and dtbp to produce a copper phosphate material around 500 degrees C. An independent solid-state thermolysis of all the three complexes in bulk at 500-510 degrees C for 2 days produced copper pyrophosphate Cu(2)P(2)O(7) along with small quantities of Cu(PO(3))(2) as revealed by DR-UV spectroscopic and PXRD studies.
Collapse
Affiliation(s)
- Ramaswamy Murugavel
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India.
| | | | | | | | | | | |
Collapse
|
32
|
Dobe C, Carver G, Bürgi HB, Tregenna-Piggott PLW, McIntyre GJ, Augustyniak-Jablokow MA, Riley MJ. Low-Temperature Single-Crystal Raman and Neutron-Diffraction Study of the Hydrogenous Ammonium Copper(II) Tutton Salt and the Deuterated Analogue in the Metastable State. Inorg Chem 2003; 42:8524-33. [PMID: 14658909 DOI: 10.1021/ic0343511] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Low-temperature (15 K) single-crystal neutron-diffraction structures and Raman spectra of the salts (NX4)2[Cu(OX2)6](SO4)2, where X=H or D, are reported. This study is concerned with the origin of the structural phase change that is known to occur upon deuteration. Data for the deuterated salt were measured in the metastable state, achieved by application of 500 bar of hydrostatic pressure at approximately 303 K followed by cooling to 281 K and the subsequent release of pressure. This allows for the direct comparison between the hydrogenous and deuterated salts, in the same modification, at ambient pressure and low temperature. The Raman spectra provide no intimation of any significant change in the intermolecular bonding. Furthermore, structural differences are few, the largest being for the long Cu-O bond, which is 2.2834(5) and 2.2802(4) A for the hydrogenous and the deuterated salts, respectively. Calorimetric data for the deuterated salt are also presented, providing an estimate of 0.17(2) kJ/mol for the enthalpy difference between the two structural forms at 295.8(5) K. The structural data suggest that substitution of hydrogen for deuterium gives rise to changes in the hydrogen-bonding interactions that result in a slightly reduced force field about the copper(II) center. The small structural differences suggest different relative stabilities for the hydrogenous and deuterated salts, which may be sufficient to stabilize the hydrogenous salt in the anomalous structural form.
Collapse
Affiliation(s)
- Christopher Dobe
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3000, Bern 9, Switzerland
| | | | | | | | | | | | | |
Collapse
|
33
|
Schwenk CF, Rode BM. New Insights into the Jahn-Teller Effect through ab initio Quantum-Mechanical/Molecular-Mechanical Molecular Dynamics Simulations of CuII in Water. Chemphyschem 2003; 4:931-43. [PMID: 14562438 DOI: 10.1002/cphc.200300659] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The CuII hydration shell structure has been studied by means of classical molecular dynamics (MD) simulations including three-body corrections and hybrid quantum-mechanical/molecular-mechanical (QM/MM) molecular dynamics (MD) simulations at the Hartree-Fock level. The copper(II) ion is found to be six-fold coordinated and [Cu(H2O)6]2+ exhibits a distorted octahedral structure. The QM/MM MD approach reproduces correctly the experimentally observed Jahn-Teller effect but exhibits faster inversions (< 200 fs) and a more complex behaviour than expected from experimental data. The dynamic Jahn-Teller effect causes the high lability of [Cu(H2O)6]2+ with a ligand-exchange rate constant some orders or magnitude higher than its neighbouring ions NiII and ZnII. Nevertheless, no first-shell water exchange occurred during a 30-ps simulation. The structure of the hydrated ion is discussed in terms of radial distribution functions, coordination numbers, and various angular distributions and the dynamical properties as librational and vibrational motions and reorientational times were evaluated, which lead to detailed information about the first hydration shell. Second-shell water-exchange processes could be observed within the simulation time scale and yielded a mean ligand residence time of approximelty 20 ps.
Collapse
Affiliation(s)
- Christian F Schwenk
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 52a, 6020 Innsbruck, Austria
| | | |
Collapse
|
34
|
Tregenna-Piggott PLW, Andres HP, McIntyre GJ, Best SP, Wilson CC, Cowan JA. Aqua Ions. 2. Structural manifestations of the Jahn-Teller effect in the beta-alums. Inorg Chem 2003; 42:1350-65. [PMID: 12588175 DOI: 10.1021/ic0259639] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Variable-temperature single-crystal neutron diffraction structures of the alums CsM(III)(SO(4))(2).12D(2)O, where M(III) = Ti, V, Mn, and Ga, are reported. Structural differences are highlighted by the titanium and manganese alums, which undergo cubic (Pathremacr;) to orthorhombic (Pbca) phase transitions at approximately 13 and approximately 156 K, respectively. The structural instability exhibited by these salts is interpreted as arising from cooperative Jahn-Teller interactions, and these measurements characterize the structural changes that result from the coupling between the electronic and vibrational states. Although the symmetry changes associated with the phase transformations are analogous for the Ti and Mn alums, the low-temperature geometries of the tervalent hexaaqua cations are markedly different. Whereas the MnO(6) framework is subject to a pronounced tetragonal elongation, changes in the Ti-O bond lengths are very modest; but significant changes in the O-Ti-O bond angles and in the disposition of the coordinated water molecules are identified. The large differences in the transition temperatures and in the low-temperature stereochemistries of the [Ti(OD(2))(6)](3+) and [Mn(OD(2))(6)](3+) cations are related to the sensitivity of the energies of the t(2g) (O(h)) and e(g) (O(h)) orbitals to the various asymmetric vibrations of the hexaaqua complex.
Collapse
|
35
|
Dolder S, Spichiger D, Tregenna-Piggott PLW. Aqua Ions. 1. The structures of the [Ru(OH(2))(6)](3+) and [V(OH(2))(6)](3+) cations in aqueous solution: an EPR and UV-Vis study. Inorg Chem 2003; 42:1343-9. [PMID: 12588174 DOI: 10.1021/ic025962g] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Spectroscopic data are presented for the [V(OH(2))(6)](3+) and [Ru(OH(2))(6)](3+) cations, from which inferences are drawn regarding their structures in aqueous solution. EPR and absorption spectra of solutions and glasses are supplemented by spectra of the aqua ions in various crystalline environments, and the electronic and molecular structures inter-related through elementary angular overlap model calculations. It is concluded that in aqueous solution the [Ru(OH(2))(6)](3+) cation is localized in the all-horizontal D(3)(d)geometry, whereas the structure of the [V(OH(2))(6)](3+) cation is close to T(h) symmetry. These results are consistent with the most energetically favored geometries predicted by ab initio calculations.
Collapse
Affiliation(s)
- Stefan Dolder
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3000, Bern 9, Switzerland
| | | | | |
Collapse
|
36
|
Halcrow MA. Interpreting and controlling the structures of six-coordinate copper(ii) centres – When is a compression really a compression? Dalton Trans 2003. [DOI: 10.1039/b309242a] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
37
|
Yablokov YV, Augustyniak-Jabłokow MA, Hitchman M, Reinen D. The Mechanisms of Jahn–Teller Complex Reorientations. ADVANCES IN QUANTUM CHEMISTRY 2003. [DOI: 10.1016/s0065-3276(03)44031-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
38
|
Dobe C, Andres HP, Tregenna-Piggott PL, Mossin S, Weihe H, Janssen S. Variable temperature inelastic neutron scattering study of chromium(II) Tutton salt: manifestation of the 5E⊗e Jahn–Teller effect. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)01131-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
39
|
|
40
|
BIETSCH W, MIREA A, KAMLEITER T, WEISS M, SCHUBERT US, WEIDL CH, ESCHBAUMER C, OVCHINNIKOV I, DOMRACHEVA N. Exchange interaction and Jahn—Teller correlations in novel tetranuclear supramolecular Cu(II) grid complexes: an ESR study. Mol Phys 2002. [DOI: 10.1080/00268970210127979] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
41
|
Grove H, Sletten J, Julve M, Lloret F, Lezama L, Carranza J, Parsons S, Rillema P. Copper(II) complexes of 1,4,5,8,9,12-hexaazatriphenylene with oxalate, squarate, perchlorate as auxiliary ligands or counter ion. J Mol Struct 2002. [DOI: 10.1016/s0022-2860(01)00891-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
42
|
Cha YH, Strauss HL. Infrared Hole-Burning of Crystalline Ammonium Copper Tutton Salt: Tunneling Kinetics and Jahn−Teller Distortions. J Phys Chem A 2002. [DOI: 10.1021/jp012848v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yun-Hwan Cha
- Department of Chemistry, University of California, Berkeley, California 94720-1460
| | - Herbert L. Strauss
- Department of Chemistry, University of California, Berkeley, California 94720-1460
| |
Collapse
|
43
|
Hitchman MA, Yablokov YV, Petrashen VE, Augustyniak-Jabłokov MA, Stratemeier H, Riley MJ, Łukaszewicz K, Tomaszewski PE, Pietraszko A. Dynamic behavior of the Jahn-Teller distorted Cu(H(2)O)(6)(2+) ion in Cu(2+) doped Cs(2)[Zn(H(2)O)(6)](ZrF(6))(2) and the crystal structure of the host lattice. Inorg Chem 2002; 41:229-38. [PMID: 11800611 DOI: 10.1021/ic010464d] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The temperature dependence of the X- and Q-band EPR spectra of Cs(2)[Zn(H(2)O)(6)](ZrF(6))(2) containing approximately 1% Cu(2+) is reported. All three molecular g-values vary with temperature, and their behavior is interpreted using a model in which the potential surface of the Jahn-Teller distorted Cu(H(2)O)(6)(2+) ion is perturbed by an orthorhombic "strain" induced by interactions with the surrounding lattice. The strain parameters are significantly smaller than those reported previously for the Cu(H(2)O)(6)(2+) ion in similar lattices. The temperature dependence of the two higher g-values suggests that in the present compound the lattice interactions change slightly with temperature. The crystal structure of the Cs(2)[Zn(H(2)O)(6)](ZrF(6))(2) host is reported, and the geometry of the Zn(H(2)O)(6)(2+) ion is correlated with lattice strain parameters derived from the EPR spectrum of the guest Cu(2+) complex.
Collapse
Affiliation(s)
- Michael A Hitchman
- School of Chemistry, University of Tasmania, Box 252-75 Hobart, TAS 7001 Australia.
| | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Crystal structure, ferromagnetostructural behavior and evidence of cooperative Jahn–Teller interactions of the complex [CuL]Cl·H2O (L=N-glycyl-2(aminomethyl)benzimidazol), synthesized by a novel simple method of peptide bond formation. J Mol Struct 2002. [DOI: 10.1016/s0022-2860(01)00649-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
45
|
Persson I, Persson P, Sandström M, Ullström AS. Structure of Jahn–Teller distorted solvated copper(ii) ions in solution, and in solids with apparently regular octahedral coordination geometry. ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b200698g] [Citation(s) in RCA: 146] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
46
|
Tregenna-Piggott PL, Güdel HU. Influence of Jahn-Teller coupling on the magnetic properties of transition metal complexes with orbital triplet ground terms: magnetization and electronic Raman studies of the titanium(III) hexa-aqua cation. Inorg Chem 2001; 40:5497-506. [PMID: 11599947 DOI: 10.1021/ic010277f] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Magnetization and electronic Raman data are presented for salts of the type Cs[Ga:Ti](SO(4))(2) x 12H(2)O, which enable a very precise definition of the electronic structure of the [Ti(OH(2))(6)](3+) cation. The magnetization data exhibit a spectacular deviation from Brillouin behavior, with the magnetic moment highly dependent on the strength of the applied field at a given ratio of B/T. This arises from unprecedented higher-order contributions to the magnetization, and these measurements afford the determination of the ground-state Zeeman coefficients to third-order. The anomalous magnetic behavior is a manifestation of Jahn-Teller coupling, giving rise to low-lying vibronic states, which mix into the ground state through the magnetic field. Electronic Raman measurements of the 1%-titanium(III)-doped sample identify the first vibronic excitation at approximately 18 cm(-1), which betokens a substantial quenching of spin-orbit coupling by the vibronic interaction. The ground-state Zeeman coefficients are strongly dependent on the concentration of titanium(III) in the crystals, and this can be modeled as a function of one parameter, representing the degree of strain induced by the cooperative Jahn-Teller effect. This study clearly demonstrates the importance that the Jahn-Teller effect can have in governing the magnetic properties of transition metal complexes with orbital triplet ground terms.
Collapse
Affiliation(s)
- P L Tregenna-Piggott
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3000, Bern 9, Switzerland.
| | | |
Collapse
|
47
|
Continuous changes of the Jahn–Teller deformation of Cu(H2O)6 complex in ferroelastic Cs2Cu(ZrF6)2·6H2O crystal. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00801-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
48
|
Affiliation(s)
- Vanessa M. Masters
- Department of Chemistry, University of Queensland, St Lucia, 4072, QLD, Australia
| | - Mark J. Riley
- Department of Chemistry, University of Queensland, St Lucia, 4072, QLD, Australia
| | - Michael A. Hitchman
- Department of Chemistry, University of Tasmania, GPO Box 252-75, Hobart, 7001, TAS, Australia
| |
Collapse
|
49
|
Simmons CJ, Hitchman MA, Stratemeier H. Influence of deuteration on the crystal structure of (NH4)2[Zn(H2O)6](SO4)2. Inorg Chem 2000; 39:6124-6. [PMID: 11151512 DOI: 10.1021/ic000536l] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C J Simmons
- Division of Natural Sciences, University of Hawaii at Hilo, 200 West Kawili Street, Hilo, Hawaii 96720-4091, USA.
| | | | | |
Collapse
|
50
|
Riley MJ. Geometric and Electronic Information from the Spectroscopy of Six-Coordinate Copper(II) Compounds. ACTA ACUST UNITED AC 2000. [DOI: 10.1007/3-540-44474-2_2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
|