Luminescent and magnetic [TbEu] 2D metal–organic frameworks
Elena Bartolomé, Ana Arauzo, Sara Fuertes, L. Navarro-Spreafica, Pablo Sevilla, Helena Fernández Cortés, Nicholas S. Settineri, Simon J. Teat, E. Carolina Sañudo
Abstract
excitation of the ligand, showing benzoates are efficient antenna ligands. Efficient energy transfer from Tb → Eu was observed in the heterometallic [TbEu] compounds, which could potentially perform as luminescent thermometers. Inks containing nanosheets of 2D MOFs exfoliated in solution were prepared, and luminescent prints of Tb and Eu 2D MOFs on paper were made to show the possible application for anticounterfeiting. Frequency-dependent ac susceptibility results show the occurrence of slow magnetic relaxation in [TbEu] compounds through direct relaxation mechanisms, affected by bottleneck effect. A slowing down of the relaxation time is observed as the Eu/Tb ratio increases.