Mononuclear lanthanide complexes assembled from a tridentate NNO donor ligand: design of a DyIII single-ion magnet

Pankaj Kalita; Amit Malakar; Joydeb Goura; Subhashree Nayak; Juan Manuel Herrera; Enrique Colacio; Vadapalli Chandrasekhar

doi:10.1039/C9DT00504H

Mononuclear lanthanide complexes assembled from a tridentate NNO donor ligand: design of a Dy^III single-ion magnet†

Pankaj Kalita,

^a Amit Malakar,^ad Joydeb Goura,^ac Subhashree Nayak,^a Juan Manuel Herrera,

^b Enrique Colacio

*^b and Vadapalli Chandrasekhar

*^cd

Author affiliations

* Corresponding authors

^a School of Chemical Sciences, National Institute of Science Education and Research Bhubaneswar, HBNI, Jatni, Khurda – 752050, Odisha, India
E-mail: pankajkalita14@niser.ac.in, amitchem.27@gmail.com, joydebgoura@gmail.com, subhashree.nayak@niser.ac.in

^b Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avenida de Fuentenueva s/n, 18071 Granada, Spain
E-mail: ecolacio@ugr.es, jmherrera@ugr.es

^c Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
E-mail: vc@iitk.ac.in, vc@tifrh.res.in

^d Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500107, India

Abstract

The reaction of a tridentate NNO donor ligand, 4-nitro-2-((2-(pyridine-2-yl)hydrazono)methyl)phenol (HL) with lanthanide(III) nitrates in the presence of triethylamine afforded a new family of neutral mononuclear Ln^III complexes [Ln(NO₃)(L)₂(HOCH₃)] (Ln = Gd; (1) Tb; (2), Dy; (3), and Ho (4). The mononuclear complexes were structurally characterized by single crystal X-ray diffraction studies which revealed a spherical tricapped trigonal prism geometry with a pseudo D_3h symmetry around the Ln^III centre. Static (dc) and dynamic (ac) magnetic studies have been performed on these complexes. Field-induced single-ion magnet behaviour was observed in the Dy^III analogue with an effective energy barrier and an pre-exponential factor of Δ/k_B = 68(2) K and τ₀ = 1.8 × 10⁻⁷ s, respectively.

This article is part of the themed collection: Inorganic chemistry of the p-block elements

Supplementary files

Article information

DOI: https://doi.org/10.1039/C9DT00504H
Article type: Paper
Submitted: 01 fev 2019
Accepted: 08 mar 2019
First published: 08 mar 2019

Download Citation

Dalton Trans., 2019,48, 4857-4866

Permissions

Request permissions

Mononuclear lanthanide complexes assembled from a tridentate NNO donor ligand: design of a Dy^III single-ion magnet

P. Kalita, A. Malakar, J. Goura, S. Nayak, J. M. Herrera, E. Colacio and V. Chandrasekhar, Dalton Trans., 2019, 48, 4857 DOI: 10.1039/C9DT00504H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Dalton Transactions