Synthesis and Porous Crystal Structure of a New Tetranuclear $$\text{\{Mn}_2^{\text{II}}\text{Mn}_2^{\text{III}}\}$$ Cluster Based on a Calix[4]Arene Functionalized at the Upper Rim by Distal p-(4-Nitrophenyl)Diazenyl and p-tert-Butyl Groups

Elucidating the role of the o-methoxy group in the lower rim appended salicylideneamine substituents of calix[4]arene ligands on the molecular and electronic structures of dinuclear Fe(iii)-based diamond-core complexes

“…Calix [4]arene (1) and its sulphurated analogues thiacalix [4] arene (2) and sulfonylcalix [4]arene (3) (Fig. 1a), with or without substitution, represent a family of macrocyclic polydentate ligands that demonstrate rich coordination chemistry towards various 3d and 4f cations, resulting in the formation of discrete clusters, [32][33][34][35][36][37][38][39][40][41] supramolecular metal-organic cages (polyhedra) [42][43][44] or 1D-3D coordination polymers. [45][46][47] These ligands exhibit different attractive functions, such as porosity, single-molecule magnet behavior, magnetocalorimetric effect, and luminescence.…”