Self-assembly of Schiff base anions and trapping of HO−, O2− and Piv− bridges in a family of Ni3Ln4 complexes: synthesis, structures and magnetic properties

Biswas, M., Mavromagoulos, A., Murrie, M. and Ray, D. (2023) Self-assembly of Schiff base anions and trapping of HO−, O2− and Piv− bridges in a family of Ni3Ln4 complexes: synthesis, structures and magnetic properties. New Journal of Chemistry, 47, pp. 14868-14875. (doi: 10.1039/D3NJ01092A)

Abstract

A unique family of heptanuclear 3d-4f complexes, [Ni3Ln4L3(OH)3O(Piv)6(MeOH)2(MeO)]·nH2O (Ln = Dy, 1; Tb, 2; Ho, 3; Piv = Me3CCO2−), has been synthesized using Schiff-base H2L (L = 2-((2-hydroxy-3-methoxybenzylidene)amino)benzoic acid), NEt3, NiCl2∙6H2O and Ln(NO3)3∙5H2O in refluxing MeOH-CHCl3 solvent mixture. Single-crystal X-ray diffraction studies revealed that the coordination aggregates were grown around an unique μ4-O2− unit, which connects four lanthanide ions. Three supporting μ3-HO− ions were used to connect three L2− bound Ni∙∙∙Ln fragments to the central LnIII center, which is not coordinated to any Schiff-base anion. Six μ1,3-pivalate anions extended further supports for three L2− bound Ni∙∙∙Ln fragments and three Ln∙∙∙Ln fragments. Magnetic studies of 1-3 in the solid state are consistent with weak antiferromagnetic interactions between the 3d and 4f ions.

• Item Type: Articles
• Additional Information: M.B. gratefully acknowledges University Grants Commission (UGC) New Delhi, India, for financial support.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Mavromagoulos, Athanasios and Murrie, Professor Mark
• Authors: Biswas, M., Mavromagoulos, A., Murrie, M., and Ray, D.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: New Journal of Chemistry
• Publisher: Royal Society of Chemistry
• ISSN: 1144-0546
• ISSN (Online): 1369-9261
• Published Online: 11 July 2023
• Copyright Holders: Copyright © 2023 The Royal Society of Chemistry
• First Published: First published in New Journal of Chemistry 47:14868-14875
• Publisher Policy: Reproduced in accordance with the publisher copyright policy