abstract
The first supramolecular cage formed by three benzo-15-crown-5 macrocycles encapsulating a [Dy(OH2)(8)](3+) guest cation is reported, with the Dy(III) centre exhibiting local pseudo square antiprismatic D-4d symmetry. The anisotropy barrier extracted from ac susceptibility studies, emission spectroscopy and ab initio calculations reveals that the second excited state Kramers doublet plays a key role in the magnetization dynamics due to the Ising character and near coparallel nature of the ground and first excited Kramers doublets.
keywords
SINGLE-MOLECULE MAGNETS; ION-MAGNET; DY-III; RELAXATION DYNAMICS; OPTICAL-PROPERTIES; SLOW RELAXATION; ZN-DY; COMPLEX; ANISOTROPY; SYMMETRY
subject category
Chemistry
authors
Al Hareri, M; Gavey, EL; Regier, J; Ali, ZR; Carlos, LD; Ferreira, RAS; Pilkington, M
our authors
Luís Carlos
Full professor
Maria Rute de Amorim e Sá Ferreira André
Full professoracknowledgements
This work was supported by NSERC (DG; MP, USRA; M. A.-H.), CRC (Tier II MP), Brock University, CFI (New Opportunities, MP), OIT (matching funds, MP) and the Lybian North American Scholarship program (Z. R.-A.). This work is partially developed in the scope of the projects CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013) financed by national funds through the Fundacao para a Ciencia e a Tecnologia/Ministerio da Educacao e Ciencia (FCT/MEC) and when applicable co-financed by FEDER under the PT2020 Partnership Agreement.