Nickel(II)–Lanthanide(III) Magnetic Exchange Coupling Influencing Single‐Molecule Magnetic Features in {Ni2Ln2} Complexes1. Issue 44 (11th September 2014)

• Record Type: Journal Article
• Authors: Ahmed, Naushad; Das, Chinmoy; Vaidya, Shefali; Langley, Stuart K.; Murray, Keith S.; Shanmugam, Maheswaran
• Is Part Of: Chemistry. Volume 20:Issue 44(2014)
• Page Start: 14235
• Page End: 14239
• Publication Date: 2014-09-11
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201404393
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Four isostructural [Ni₂Ln₂(CH₃CO₂)₃(HL)₄(H₂O)₂]³⁺(Ln³⁺=Dy (<bold>1</bold>), Tb (<bold>2</bold>), Ho (<bold>3</bold>) or Lu (<bold>4</bold>)) complexes and a dinuclear [NiGd(HL)₂(NO₃)₃] (<bold>5</bold>) complex are reported (where HL=2‐methoxy‐6‐[(<italic>E</italic>)‐2′‐hydroxymethyl‐phenyliminomethyl]‐phenolate). For compounds <bold>1</bold>–<bold>3</bold> and <bold>5</bold>, the Ni²⁺ ions are ferromagnetically coupled to the respective lanthanide ions. The ferromagnetic coupling in <bold>1</bold> suppresses the quantum tunnelling of magnetisation (QTM), resulting in a rare zero dc field Ni–Dy single‐molecule magnet, with an anisotropy barrier <italic>U_eff</italic> of 19 K.</p> </abstract>