A new flexible multi-dentate 1-(4-aminobenzyl)-1,2,4-triazole (abtz) ligand has been synthesized, and a series of two-dimensional triazole-functionalized metal–organic frameworks has been isolated.
New Hofmann-type metal–organic frameworks display rare and complete ligand exchange induced single crystal to single crystal transformations from 3D frameworks to 2D layers, accompanied by magnetic properties transition from two-step SCO behavior to hysteretic SCO behavior.
Water molecule induced reversible single-crystal-to-single-crystal transformation between two trinuclear Fe(ii) complexes with different spin crossover behaviour.