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A dinuclear complex (HNEt3)[Dy2(MQ)4(NO3)3]·EtOH·H2O (HMQ = 2-methyl-8-hydroxyquinoline) was prepared and proved to have no observable single-molecule magnet (SMM) behaviour. With increasing NEt3 in the reaction, two coordinated NO3− units in… Click to show full abstract
A dinuclear complex (HNEt3)[Dy2(MQ)4(NO3)3]·EtOH·H2O (HMQ = 2-methyl-8-hydroxyquinoline) was prepared and proved to have no observable single-molecule magnet (SMM) behaviour. With increasing NEt3 in the reaction, two coordinated NO3− units in the {(NO3)3} pocket were replaced by an additional “magnetic motif” [Dy(MQ)4]−. In this way, the unfavourable interactions between the two dysprosiums were diminished and a trinuclear complex [Dy3(MQ)8(NO3)] was obtained, which behaves as an SMM with an efficient energy barrier of 244(21) K for the full temperature range and 150(12) K for the high-temperature region. It is suggested that introduction of a “magnetic motif” is a feasible strategy for modulating the magnetic behaviour of polynuclear systems.
Journal Title: Inorganic chemistry frontiers
Year Published: 2017
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