Azido has been one of the well used bridging ligands in the construction of magnetic molecule materials, which has stimulated considerable interest in magnetochemistry. This tutorial review is concentrated on the study of azido metal compounds with their magnetochemistry and consists of eight main sections. The first section offers an introduction to azido complexes and some important results obtained from magneto–structural correlation in azido complexes which will be referred to in the following sections. The next six sections give overviews of azido-mediated ferromagnets, ferrimagnets, canted (weak) ferromagnets, antiferromagnets, single molecule magnets (SMMs) and single chain magnets (SCMs), and metamagnets. The last section is the conclusion and gives a perspective of azido-mediated magnets.

The design and development of crystalline porous materials (CPMs), including metal–organic frameworks (MOFs) and covalent–organic frameworks (COFs), have been subjects of extensive study due to their regular crystalline lattices and well-defined pore structures. In recent times, an enormous amount of research effort has gone into using CPMs as sacrificial templates to fabricate electrochemically functional materials. The inherently electrochemically active sites inside CPMs are notably abundant and being explored with respect to electrochemical reactions. In this review, electrochemically active sites and the space around them (metal ions, ligands, crystal structures, pores, and morphologies) inside CPMs are the focus and recent progress in the fields of metal-ion batteries, metal–air batteries, water splitting, and other related electrochemical devices has been summarized. Overall, this review provides guidance on the preparation of electroactive CPMs via rational design and modulation of active sites such as redox-active metal clusters and organic ligands, and the space around the electrochemically active sites, and their applications in electrochemical energy storage and conversion systems.