|
1
|
Hasnaoui A, Hdoufane I, Alahyane A, Nayad A, Cherqaoui D, Ait Ali M, El Firdoussi L. Di-μ-oxidovanadium(V) di-nuclear complexes: Synthesis, X-ray, DFT modeling, Hirshfeld surface analysis and antioxidant activity. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119276] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
|
2
|
Kalita P, Goura J, Herrera JM, Colacio E, Chandrasekhar V. Heterometallic Octanuclear Ni II 4Ln III 4 (Ln = Y, Gd, Tb, Dy, Ho, Er) Complexes Containing Ni II 2Ln III 2O 4 Distorted Cubane Motifs: Synthesis, Structure, and Magnetic Properties. ACS OMEGA 2018; 3:5202-5211. [PMID: 31458734 PMCID: PMC6641754 DOI: 10.1021/acsomega.8b00292] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 04/30/2018] [Indexed: 06/10/2023]
Abstract
The reaction of 2-methoxy-6-[{2-(2-hydroxyethylamino)ethylimino}methyl] phenol (LH3) with lanthanide metal salts followed by the addition of nickel acetate allowed isolation of a family of octanuclear complexes, [Ni4Ln4(μ2-OH)2(μ3-OH)4(μ-OOCCH3)8(LH2)4]·(OH)2·xH2O. Single crystal X-ray diffraction studies of these complexes reveal that their central metallic core consists of two tetranuclear [Ni2Ln2O4] cubane subunits fused together by acetate and hydroxide bridges. The magnetic study of these complexes reveals a ferromagnetic interaction between the LnIII and the NiII center. The magnitude of exchange coupling between the NiII and LnIII center, parametrized from the magnetic data of the Gd analogue, gives J = +0.86 cm-1. The magneto caloric effect, studied for the NiII 4GdIII 4 complex, shows a maximum of magnetic entropy change, -ΔS m = 22.58 J kg-1 K-1 at 3 K for an applied external field of 5 T.
Collapse
Affiliation(s)
- Pankaj Kalita
- School
of Chemical Sciences, National Institute
of Science Education and Research, Homi Bhabha National Institute, Jatni, Khurda, Bhubaneswar 752050, Odisha, India
| | - Joydeb Goura
- School
of Chemical Sciences, National Institute
of Science Education and Research, Homi Bhabha National Institute, Jatni, Khurda, Bhubaneswar 752050, Odisha, India
- Department
of Chemistry, Indian Institute of Technology
Kanpur, Kanpur 208016, India
| | - Juan Manuel Herrera
- Departamento
de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avenida de Fuentenueva s/n, 18071 Granada, Spain
| | - Enrique Colacio
- Departamento
de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avenida de Fuentenueva s/n, 18071 Granada, Spain
| | - Vadapalli Chandrasekhar
- Department
of Chemistry, Indian Institute of Technology
Kanpur, Kanpur 208016, India
- Centre
for Interdisciplinary Sciences, Tata Institute
of Fundamental Research Hyderabad, Gopanpally, Hyderabad 500107, India
| |
Collapse
|
|
3
|
Goura J, Brambleby J, Topping CV, Goddard PA, Suriya Narayanan R, Bar AK, Chandrasekhar V. Heterometallic trinuclear {CoIII2LnIII} (Ln = Gd, Tb, Ho and Er) complexes in a bent geometry. Field-induced single-ion magnetic behavior of the ErIII and TbIII analogues. Dalton Trans 2016; 45:9235-49. [DOI: 10.1039/c5dt03871e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In this paper we report the synthesis, structures and detailed magnetic properties of heterometallic trinuclear CoIIILnIII complexes.
Collapse
Affiliation(s)
- Joydeb Goura
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur-208016
- India
| | | | - Craig V. Topping
- Department of Physics
- Clarendon Laboratory
- University of Oxford
- Oxford
- UK
| | | | | | - Arun Kumar Bar
- National Institute of Science Education and Research Bhubaneswar
- P.O. Jatni
- India
| | - Vadapalli Chandrasekhar
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur-208016
- India
- National Institute of Science Education and Research Bhubaneswar
| |
Collapse
|
|
4
|
Goura J, Brambleby J, Goddard P, Chandrasekhar V. A Single-Ion Magnet Based on a Heterometallic CoIII2DyIIIComplex. Chemistry 2015; 21:4926-30. [DOI: 10.1002/chem.201406021] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Indexed: 11/11/2022]
|