The synthesis of heterotrimetallic molecular cages is reported.The assemblies contain three types of coordination compounds:Fe^(Ⅱ)clathrochelate complexes,Au_(3)^(Ⅰ)(pyrazolate)3 complexes,and[Pd^(Ⅱ)(pyridine)_(4)]...The synthesis of heterotrimetallic molecular cages is reported.The assemblies contain three types of coordination compounds:Fe^(Ⅱ)clathrochelate complexes,Au_(3)^(Ⅰ)(pyrazolate)3 complexes,and[Pd^(Ⅱ)(pyridine)_(4)]^(2+)complexes.The cages were obtained in a stepwise fashion.A nanometer-sized metalloligand with three terminal 3-pyridyl donor groups was prepared by connection of three Fe^(Ⅱ)clathrochelate complexes via a central Au_(3)(pyrazolate)3 complex.A related strategy was employed for the synthesis of a ditopic N-donor ligand with two functionalized Fe^(Ⅱ)clathrochelate complexes.Combining the tritopic ligand with[Pd(CH_(3)CN)_(4)](BF_(4))_(2)resulted in the clean formation of a spherical Pd_(6)^(Ⅱ)Fe_(24)^(Ⅱ)Au_(24)^(Ⅰ)coordination cage with a diameter of∼4.1 nm and a molecular weight of 21 kDa.The ditopic metalloligand was used for the construction of a Pd_(2)^(Ⅱ)Pd_(8)^(Ⅱ)Au_(12)^(Ⅰ)cage.展开更多
基金supported by theÉcole Polytechnique Fédérale de Lausanne(EPFL).
文摘The synthesis of heterotrimetallic molecular cages is reported.The assemblies contain three types of coordination compounds:Fe^(Ⅱ)clathrochelate complexes,Au_(3)^(Ⅰ)(pyrazolate)3 complexes,and[Pd^(Ⅱ)(pyridine)_(4)]^(2+)complexes.The cages were obtained in a stepwise fashion.A nanometer-sized metalloligand with three terminal 3-pyridyl donor groups was prepared by connection of three Fe^(Ⅱ)clathrochelate complexes via a central Au_(3)(pyrazolate)3 complex.A related strategy was employed for the synthesis of a ditopic N-donor ligand with two functionalized Fe^(Ⅱ)clathrochelate complexes.Combining the tritopic ligand with[Pd(CH_(3)CN)_(4)](BF_(4))_(2)resulted in the clean formation of a spherical Pd_(6)^(Ⅱ)Fe_(24)^(Ⅱ)Au_(24)^(Ⅰ)coordination cage with a diameter of∼4.1 nm and a molecular weight of 21 kDa.The ditopic metalloligand was used for the construction of a Pd_(2)^(Ⅱ)Pd_(8)^(Ⅱ)Au_(12)^(Ⅰ)cage.
