title: Insight into the reactivity of in situ formed {(NbO2)3SiW9}: synthesis, structure, and solution properties of a trimeric polytungstosilicate trapping a {MnNb9} core.
abstract: A new trimeric cluster [(SiW9Nb3O38)3MnO3(H2O)3]13-(1) with three Keggin-type trilacunary SiW9 units connected by a {MnNb9} core were structurally characterized. The polyanion 1 features three corner-shared {Nb3O3} fragments that are linked to each other on two sides via three Nb-O-Nb bridges and by a {MnII} linker. To the best of our knowledge, polyanion 1 represents the first example of a trimeric niobotungstate cluster reported to date, and is revealed for the first time uniting a family of polytungstosilicate clusters. The formation of polyanion 1 exemplifies the reactivity of {(NbO2)3SiW9} with a manganese metal ion, defining a new in situ synthetic strategy for {(NbO2)3SiW9}-based derivatives, featuring POM chemistry between Nb/W mixed-addendum POMs and various transition-metal or lanthanide species.
authors.affiliation: Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China. ddzhang@henu.edu.cn jyniu@henu.edu.cn.
authors.forename: Haiying
authors.initials: H
authors.lastname: Wang
authors.affiliation: Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China. ddzhang@henu.edu.cn jyniu@henu.edu.cn.
authors.forename: Zhijie
authors.initials: Z
authors.lastname: Liang
authors.affiliation: Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China. ddzhang@henu.edu.cn jyniu@henu.edu.cn.
authors.forename: Yaya
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China. ddzhang@henu.edu.cn jyniu@henu.edu.cn.
authors.forename: Dongdi
authors.initials: D
authors.lastname: Zhang
authors.affiliation: Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China. ddzhang@henu.edu.cn jyniu@henu.edu.cn.
authors.forename: Pengtao
authors.initials: P
authors.lastname: Ma
authors.affiliation: Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China. ddzhang@henu.edu.cn jyniu@henu.edu.cn.
authors.forename: Jingping
authors.initials: J
authors.lastname: Wang
authors.affiliation: Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China. ddzhang@henu.edu.cn jyniu@henu.edu.cn.
authors.forename: Jingyang
authors.initials: J
authors.lastname: Niu