Accommodating disparate spin centres within a single ensemble is a valuable synthetic strategy to obtaininteresting molecular magnetic materials.3d–4f heterometallic complexes are one such subclass that hasbeen exten...Accommodating disparate spin centres within a single ensemble is a valuable synthetic strategy to obtaininteresting molecular magnetic materials.3d–4f heterometallic complexes are one such subclass that hasbeen extensively explored for the last three decades owing to their interesting magnetic properties.Theprimary reason is that the bridging ligand mediates magnetic super-exchange between 3d and 4f ions toconsiderably reduce the prevalent quantum tunnelling of magnetisation(QTM)in such complexes.Among the 3d–4f family,Cr^(Ⅲ)–Ln^(Ⅲ) assemblies nicely demonstrate the pivotal role played by strongexchange interactions between these two individual spin carriers to engender interesting single-moleculemagnet(SMM)properties.In fact,this part of heterometallic chemistry has flourished greatly in the lastdecade despite its late development.In this review we provide an extensive synthetic,structural,magnetic,and magnetocaloric description of various Cr^(Ⅲ)–Ln^(Ⅲ) complexes along with their fundamental mecha-nisms of exchange interaction.Finally,we provide some possible solutions to improve the SMM propertiesof the Cr^(Ⅲ)–Ln^(Ⅲ) and other heterometallic complexes.展开更多
基金support from the SERB-DST Early Career Research Award(ECR)with Project Number ECR/2016/001746.
文摘Accommodating disparate spin centres within a single ensemble is a valuable synthetic strategy to obtaininteresting molecular magnetic materials.3d–4f heterometallic complexes are one such subclass that hasbeen extensively explored for the last three decades owing to their interesting magnetic properties.Theprimary reason is that the bridging ligand mediates magnetic super-exchange between 3d and 4f ions toconsiderably reduce the prevalent quantum tunnelling of magnetisation(QTM)in such complexes.Among the 3d–4f family,Cr^(Ⅲ)–Ln^(Ⅲ) assemblies nicely demonstrate the pivotal role played by strongexchange interactions between these two individual spin carriers to engender interesting single-moleculemagnet(SMM)properties.In fact,this part of heterometallic chemistry has flourished greatly in the lastdecade despite its late development.In this review we provide an extensive synthetic,structural,magnetic,and magnetocaloric description of various Cr^(Ⅲ)–Ln^(Ⅲ) complexes along with their fundamental mecha-nisms of exchange interaction.Finally,we provide some possible solutions to improve the SMM propertiesof the Cr^(Ⅲ)–Ln^(Ⅲ) and other heterometallic complexes.
