Three-dimensional metal-halide open frameworks

[Display omitted] In this review, a survey of the structural chemistry of three-dimensional metal-halide open frameworks is presented. In addition, on the basis of current advances in metal-halide open frameworks, the development prospects and the current challenges for such materials are also discussed. •The developments of three-dimensional metal-halide frameworks are summarized.•The structure-property/application relationships of three-dimensional metal-halide frameworks are summarized.•Feasible synthetic strategies for further development of three-dimensional metal-halide frameworks are presented.•The development prospects and the current challenges for three-dimensional metal-halide frameworks are discussed. Metal-halide open frameworks is a family of important inorganic porous crystalline materials not only due to their intriguing architectures for crystal engineering but also for their wide applications in optoelectronic devices, photocatalysis, luminescence, thermochromism, photochromism, and so on. In this review, a survey of the structural chemistry of three-dimensional non-perovskite-type metal-halide open frameworks is presented. In addition, on the basis of current advances in metal-halide open frameworks, the development prospects and the current challenges for such materials are also discussed.