Polyfunctional Yb(iii) tropolonate complexes: slow magnetic relaxation and luminescence

Abstract

New Yb(III) coordination compound [YbT₃(Bath)]·0.5EtOH containing HT (HT = tropolone, 2-hydroxy-2,4,6-cycloheptatrien-1-one) and Bath (4,7-diphenyl-1,10-phenanthroline), was synthesized and identified based on Powder X-ray analysis data. The magnetic and photophysical properties of the obtained heteroleptic complex were studied and compared with previously acquired results for homoleptic dimeric complex [YbT₃HT]₂. The synthesized compound exhibits slow relaxation of magnetization under an external dc-field with a magnetization barrier of 38.2 K and demonstrates a higher luminescence quantum yield of 1.5%, compared to 0.9% for complex [YbT₃HT]₂.