Polyoxometalate-based all-inorganic open frameworks

[Display omitted] •The developments of all-inorganic POM-based frameworks including their syntheses, structures, properties and related applications are summarized.•The structure–property/application relationships of all-inorganic POM-based frameworks are summarized.•Feasible synthetic strategies for further development of all-inorganic POM-based frameworks are presented.•The development prospects and the current challenges for all-inorganic POM-based frameworks are discussed. Polyoxometalates (POMs) are an intriguing class of compounds that have been extensively studied due to their unique structures and diverse properties. In the past years, the synthesis of POM-based all-inorganic open frameworks has attracted increasing attention due to their potential applications in various fields, such as in electrode, magnetic, and catalytic materials. This review not only provides a comprehensive survey on POM-based all-inorganic open frameworks, including their structures, properties, and potential applications, but also discusses the current challenges in this field and provides an outlook for future research directions.