Synthesis, structure and magnetocaloric properties of a new two‐dimensional gadolinium(III) coordination polymer based on azobenzene‐2,2′,3,3′‐tetracarboxylic acid. - Wei, Wen-Wen; Lu, Li-Ping; Feng, Si-Si; Zhu, Miao-Li; Englert, Ulli (Acta Crystallographica Section C: Structural Chemistry, 2021)