A new 2D fluorescent polyoxometalate built up of circular {P${}_5$W${}_{30}$} clusters and Tb${}^{3+}$ cations

A new all inorganic polyoxometalate (POM), which is composed of the [Na(H${}_2$O)P${}_5$W${}_{30}$O${}_{110}$]${}^{14-}$ ({P${}_5$W${}_{30}$}) clusters and Tb${}^{3+}$ cations, Na${}_2$[Tb${}_4$(H${}_2$O)${}_{28}${Na(H${}_2$O)P${}_5$W${}_{30}$O${}_{110}$}]·16H${}_2$O (1), was obtained by using hydrothermal method. Its structure was further characterized by single-crystal X-ray diffraction, elemental analysis, IR spectroscopy, TG, and PXRD. Compound 1 displays a 2D layered structure formed by {P${}_5$W${}_{30}$} clusters and [Tb(H${}_2$O)${}_7$]${}^{3+}$ linkers. It noteworthy that, eight coordinated sites provided by {P${}_5$W${}_{30}$} was very rare. Furthermore, the luminescent property of compound 1 was reported. (© 2020 Wiley‐VCH GmbH)