Slow magnetic relaxation in a homo dinuclear Dy(iii) complex in a pentagonal bipyramidal geometry

Acharya, Joydev and Ahmed, Naushad and Flores Gonzalez, Jessica and Singh, Saurabh Kumar and et al, . (2020) Slow magnetic relaxation in a homo dinuclear Dy(iii) complex in a pentagonal bipyramidal geometry. Dalton Transactions, 49 (37). pp. 1-13. ISSN 1477-9226

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Abstract

We hereby report a dinuclear Dy(iii) complex, [Dy(LH3)Cl2]2·2Et2O (1) (LH4 = 2,3-dihydroxybenzylidene)-2-(hydroxyimino)propanehydrazide where both the metal centres are in a pentagonal bipyramidal (PBP) geometry with the axial positions being occupied by negatively charged Cl- ions. The complex as well as it's 10% diluted analogue (110) do not show zero-field SMM behaviour. However, in the presence of small optimum dc fields the slow relaxation of magnetization was displayed. The effective energy barrier for 110 at 800 Oe of applied field was extracted as 83(17) K with τ0 = 2(4) × 10-12 s. Through a combined experimental and ab initio electronic structure calculations studies we have thoroughly analysed the role of the ligand field around the Dy(iii), present in pentagonal bipyramidal geometry, in contributing to the slow relaxation of magnetization. © The Royal Society of Chemistry.

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IITH Creators:

IITH Creators	ORCiD
Singh, Saurabh Kumar	https://orcid.org/0000-0001-9488-8036

Item Type:

Article

Additional Information:

VC thanks the Department of Science and Technology (DST), India for J. C. Bose fellowship and also support for the Single Crystal CCD X-ray Diffractometer facility at IIT-Kanpur. FP thanks the CNRS, Université de Rennes 1, and the European Commission through the ERC-CoG 725184 MULTIPROSMM (project no. 725184) for financial support. J. A. thanks the Department of Science and Technology (DST), India, for INSPIRE Senior Research Fellowship. SKS thanks IIT Hyderabad for the generous seed grant.

Uncontrolled Keywords:

Ab-initio electronic structure calculations; Applied field; Axial positions; Effective energy; Negatively charged; Pentagonal bipyramidal geometry; Slow magnetic relaxations; Slow relaxations

Subjects:

Chemistry
Chemistry > Inorganic chemistry

Divisions:

Department of Chemistry

Depositing User:

. LibTrainee 2021

Date Deposited:

23 Nov 2022 07:10

Last Modified:

23 Nov 2022 07:10

URI:

http://raiithold.iith.ac.in/id/eprint/11332