Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 4, 2019
Previous Article Next Article

Fullerene and endometallofullerene Kagome lattices with symmetry-forced spin frustration

Author affiliations

Abstract

Salts of fullerene C60˙ and endometallofullerene Sc3N@Ih-C80˙ radical anions with Bu3MeP+ cations ((Bu3MeP+)3(C60˙)3·C6H4Cl2 (1) and (Bu3MeP+)3(Sc3N@Ih-C80˙)3·C6H4Cl2 (2)) have been obtained. The C3 symmetry of the Bu3MeP+ cation provides 2D Kagome lattices with an equilateral triangle arrangement of fullerenes in accordance with trigonal crystal symmetry P31m. The C60˙ and Sc3N@Ih-C80˙ radical anions preserve their monomeric forms in 1 and 2 with the S = 1/2 spin state down to 1.9 K. The close packing of the fullerene radical anions results in strong antiferromagnetic coupling of the spins with Weiss temperatures of −108 K for 1 and −43 K for 2. Compound 1 is a rare example of a magnetic system in which in spite of the strong magnetic coupling of spins no long-range ordering is observed down to 1.9 K. The 13C NMR spectra of the 13C enriched sample of 1 support the absence of the antiferromagnetic ordering of spins down to 1.5 K. Thus, the crystals of 1 preserve large spin frustration forced by the trigonal symmetry. Therefore, compound 1 is a promising candidate for the first observation of a quantum spin liquid (QSL) state in a fullerene-based system. Isostructural salt 2 is the first compound that contains monomeric paramagnetic Sc3N@Ih-C80˙ radical anions stable down to 1.9 K, which show strong spin frustration. These data indicate the ability of endometallofullerenes to give exotic magnetic systems such as QSLs.

Graphical abstract: Fullerene and endometallofullerene Kagome lattices with symmetry-forced spin frustration

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Nov 2018, accepted on 17 Dec 2018 and first published on 17 Dec 2018


Article type: Communication
DOI: 10.1039/C8CP07017B
Citation: Phys. Chem. Chem. Phys., 2019,21, 1645-1649

  •   Request permissions

    Fullerene and endometallofullerene Kagome lattices with symmetry-forced spin frustration

    D. V. Konarev, S. S. Khasanov, Y. Shimizu, A. V. Kuzmin, A. Otsuka, H. Yamochi, G. Saito and R. N. Lyubovskaya, Phys. Chem. Chem. Phys., 2019, 21, 1645
    DOI: 10.1039/C8CP07017B

Search articles by author

Spotlight

Advertisements