Reduction chemistry yields stable and soluble divalent lanthanide tris(pyrazolyl)borate complexes

Chowdhury, T., Evans, M. J., Coles, M. P., Bailey, A. G., Peveler, W. J. , Wilson, C. and Farnaby, J. H. (2023) Reduction chemistry yields stable and soluble divalent lanthanide tris(pyrazolyl)borate complexes. Chemical Communications, 59(15), pp. 2134-2137. (doi: 10.1039/D2CC03189B) (PMID:36727241)

Abstract

Reduction of the heteroleptic Ln(iii) precursors [Ln(Tp)2(OTf)] (Tp = hydrotris(1-pyrazolyl)borate; OTf = triflate) with either an aluminyl(i) anion or KC8 yielded the adduct-free homoleptic Ln(ii) complexes dimeric 1-Eu [{Eu(Tp)(μ-κ1:η5-Tp)}2] and monomeric 1-Yb [Yb(Tp)2]. Complexes 1-Ln have good solubility and stability in both non-coordinating and coordinating solvents. Reaction of 1-Ln with 2 Ph3PO yielded 1-Ln(OPPh3)2. All complexes are intensely coloured and 1-Eu is photoluminescent. The electronic absorption data show the 4f–5d electronic transitions in Ln(ii). Single-crystal X-ray diffraction data reveal first μ-κ1:η5-coordination mode of the unsubstituted Tp ligand to lanthanides in 1-Eu.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Wilson, Dr Claire and Peveler, Dr William and Farnaby, Dr Joy and Bailey, Anna and Chowdhury, Mr Tajrian
• Authors: Chowdhury, T., Evans, M. J., Coles, M. P., Bailey, A. G., Peveler, W. J., Wilson, C., and Farnaby, J. H.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Chemical Communications
• Publisher: Royal Society of Chemistry
• ISSN: 1359-7345
• ISSN (Online): 1364-548X
• Published Online: 30 January 2023
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in Chemical Communications 59(15): 2134-2137
• Publisher Policy: Reproduced under a Creative Commons licence

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
304445		EPSRC Capital Award emphasising support for Early Career Researchers	Muffy Calder	Engineering and Physical Sciences Research Council (EPSRC)	EP/S017984/1	S&E - College Senior Management
307898		Switchable nanoparticle assemblies for photonic sensing	William Peveler	The Royal Society (ROYSOC)	RGS\R2\192190	Chemistry