title: Solvothermal synthesis of four polyoxometalate-based coordination polymers including diverse Ag(I)···π interactions.
abstract: Four 3D POM-based silver coordination polymers, namely, [Ag17(ptz)11(PW12O40)2]n (1), [Ag17(ptz)11(PMo12O40)2]n (2), [Ag12(ptz)6(CN)2(SiW12O40)]n (3), and [Ag19(ptz)8(H2ptz)(H3ptz)(AgP5W30O110)·7H2O]n (4), have been obtained by solvothermal reaction of AgNO3 and 5-phenyl-1H-tetrazole (Hptz) ligand in the presence of four types of polyoxometalates. Structural analysis shows that four types of Ag(I)···π interactions, m-η(1), m/p-η(2), o/m-η(2), and o/m/p-η(3), were observed in compounds 1-4, depending on the polyoxometalates used. The in situ generated CN(-) ion in compound 3 shows unprecedented mixed σ and π bonding modes, similar to the C2(2-) ion in well-studied silver acetylides. For 4, the Na(+) ion in the Preyssler heteropolyoxoanion, [NaP5W30O110](14-), was exchanged by Ag(I) under solvothermal conditions, generating a novel [AgP5W30O110](14-) anion. In addition, the photoluminescence behavior of 1-4 was also investigated.
authors.affiliation: State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
authors.forename: Min-Xia
authors.initials: MX
authors.lastname: Liang
authors.forename: Chan-Zi
authors.initials: CZ
authors.lastname: Ruan
authors.forename: Di
authors.initials: D
authors.lastname: Sun
authors.forename: Xiang-Jian
authors.initials: XJ
authors.lastname: Kong
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Ren
authors.forename: La-Sheng
authors.initials: LS
authors.lastname: Long
authors.forename: Rong-Bin
authors.initials: RB
authors.lastname: Huang
authors.forename: Lan-Sun
authors.initials: LS
authors.lastname: Zheng