Novel three-dimensional framework based on Co(II)-azide chains and a tetrapyridyl ligand

► First azide-bridged magnetic system derived from a quadritopic organic bridging ligand (TPOM). ► A new example of the rare Co(II) systems with alternate double μ-1,1 N3 and double μ-1,3 N3 bridges. ► First real network showing the sqc967 3D topology, resulting from the connection of chains of different directions by TPOM. ► Magnetic properties investigated, revealing alternating ferromagnetic and antiferromagnetic interactions along the chain.