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Sarto C, Rouzières M, Liu JL, Bamberger H, van Slageren J, Clérac R, Alborés P. Slow magnetization dynamics in Co(ii)/Co(iii) triethanolamine/pivalate complexes. Dalton Trans 2018; 47:17055-17066. [PMID: 30462116 DOI: 10.1039/c8dt04041a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis, structural characterization and a combined computational and experimental study of the magnetic properties of two pivalate cobalt complexes, a mononuclear Co(ii) one and a tetranuclear Co(ii)3Co(iii) mixed valence polynuclear one. The latter shows SMM behaviour revealed under an applied DC field with a thermal barrier of ca. 30 cm-1 competing with direct and Raman relaxation processes. The Orbach thermal barrier can be understood from the doublets energy ladder arising from the anisotropic exchange interaction among ground Seff = 1/2 of each Co(ii) sites. The strong local zero-field splitting of the S = 3/2 Co(ii) states affords these well isolated ground Kramers doublets. DC and AC magnetic susceptibility measurements as well as HF-EPR spectra support this interpretation. CASSCF quantum chemical computations have been also performed in order to aid the overall comprehension of the magnetic behaviour in the reported complexes.
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Affiliation(s)
- Carolina Sarto
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE (CONICET), Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.
| | - Mathieu Rouzières
- CNRS, CRPP, UMR 5031, 33600 Pessac, France and Univ. Bordeaux, CRPP, UMR 5031, F-33600 Pessac, France
| | - Jun-Liang Liu
- CNRS, CRPP, UMR 5031, 33600 Pessac, France and Univ. Bordeaux, CRPP, UMR 5031, F-33600 Pessac, France
| | - Heiko Bamberger
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Joris van Slageren
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Rodolphe Clérac
- CNRS, CRPP, UMR 5031, 33600 Pessac, France and Univ. Bordeaux, CRPP, UMR 5031, F-33600 Pessac, France
| | - Pablo Alborés
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE (CONICET), Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.
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Zhang Y, Lv R, Wang J, Yang L, Liao S, Tian J, Gu W, Liu X. Two novel μ6-O(2-) bridged Co14/Ni14 hydroxamate clusters packed in distorted face-centered cubic patterns. Dalton Trans 2016; 45:3247-50. [PMID: 26817593 DOI: 10.1039/c5dt03974f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two novel clusters [Co(μ6-O(2-))(sbha)12(sba)2 (DMF)7(DMA)]·(DMF)8 (1) and [Ni(μ6-O(2-))(sbha)12(sba)2(DMF)8] (2) (sH2bha = 4-bromo-benzohydroximic acid; sHba = 4-bromobenzene carboxylic acid; DMF = N,N-dimethylformamide; DMA = dimethylamine) have been synthesized. The novel body-centred μ6-O(2-) bridged Co14 and Ni14 clusters are packed in distorted face-centered cubic (FCC) patterns with different symmetries. Magnetic studies confirmed the antiferromagnetic exchange interactions between magnetic centers.
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Affiliation(s)
- Yanping Zhang
- Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, and Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin 300071, P. R. China.
| | - Rui Lv
- Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, and Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin 300071, P. R. China.
| | - Jingyao Wang
- Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, and Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin 300071, P. R. China.
| | - Linyan Yang
- Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, and Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin 300071, P. R. China.
| | - Shengyun Liao
- Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, and Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin 300071, P. R. China.
| | - Jinlei Tian
- Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, and Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin 300071, P. R. China.
| | - Wen Gu
- Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, and Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin 300071, P. R. China.
| | - Xin Liu
- Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, and Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin 300071, P. R. China.
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Jiang L, Zhang DY, Suo JJ, Gu W, Tian JL, Liu X, Yan SP. Synthesis, magnetism and spectral studies of six defective dicubane tetranuclear {M4O6} (M = NiII, CoII, ZnII) and three trinuclear CdII complexes with polydentate Schiff base ligands. Dalton Trans 2016; 45:10233-48. [DOI: 10.1039/c6dt00380j] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Six defective dicubane face-shared and three trinuclear complexes are synthesized. The magnetic behaviors of NiII/CoII complexes and fluorescence properties of ZnII and CdII are studied.
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Affiliation(s)
- Lin Jiang
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Dong-Yan Zhang
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Jing-Jing Suo
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Wen Gu
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Jin-Lei Tian
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Xin Liu
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
| | - Shi-Ping Yan
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
- Key Laboratory of Advanced Energy Materials Chemistry (MOE)
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