Coordination-triggered redox activity of early and late lanthanide calix[4]arene complexes.

0584312 - ÚFCH JH 2025 RIV GB eng J - Journal Article
Jiao, Y. - Sanz, S. - Koláčná, Lucie - van Leusen, J. - Izarova, N. V. - Sarwar, S. - Ludvík, Jiří - Kogerler, P.
Coordination-triggered redox activity of early and late lanthanide calix[4]arene complexes.
Dalton Transactions. Roč. 53, č. 11 (2024), s. 4930-4936. ISSN 1477-9226. E-ISSN 1477-9234
R&D Projects: GA ČR GA23-06465S
Institutional support: RVO:61388955
Keywords : calix[4]arene complexes * anion binding * electrochemical oxidation
OECD category: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Impact factor: 4, year: 2022
Method of publishing: Open access

The methylation of p-tert-butylcalix[4]arene in the distal 1,3-phenolic sites provides H2L = {p-tert-butylcalix[4](OMe)2(OH)2arene}. This unit acts as a rigid coordinating ligand to early and late lanthanide metal ions, enabling the construction of two families of mononuclear compounds featuring (N(nBu)4)[LnIIIL(acac)2]·CH3CN (Ln = Pr (1), Nd (2), Ho (3), and Er (4)) and (N(nBu)4)2[LnIIIL{Mo5O13(OMe)4(NO)}]·CH2Cl2 (Ln = Nd (5) and Er (6)). The metal ions adopt distorted bicapped trigonal prismatic coordination environments, resulting in slow relaxation of the magnetization for 4. These compounds exhibit reversible redox waves at positive potentials, centered within the calix[4]arene ligand, representing a new type of calix[n]arene-based electrochemical activity induced by coordination to the metal centers.
Permanent Link: https://hdl.handle.net/11104/0352243