Abstract
AbstractThree Htrz‐based metal complexes, [Cd(trz)(CH3OH)(nb)]n (1), [Cd(Htrz)(H2O)(nb)2]n (2), and {[Mn(Htrz)2(H2O)4]·2nb} (3) (Htrz = 1,2,4‐triazole, Hnb = 4‐nitrobenzoic acid), have been synthesized by diffusion or solvent evaporation method and structurally characterized by single crystal X‐ray crystallography, elemental analysis, IR and fluorescence spectroscopy, and TG‐DTA. Structural determinations revealed that complex 1 has a two‐dimensional (2D) layer structure constructed by tridentate μN1,N2,N4‐bridging trz anions and CdII ions. Complex 2 presents a 1D polymeric chain structure bridged by bidentate μN1,N4‐bridging Htrz molecule and CdII ions, whereas compound 3 is a supramolecular assembly containing a mononuclear [Mn(Htrz)2(H2O)4]2+ dication and two free nb anions for charge compensation. Thus, the structural diversity of the three complexes is significantly governed by the coordination modes of the neutral/deprontated Htrz ligand, rather than the terminal/lattice nb anion. Additionally, the thermal stability of the complexes is observed to be dependent on the polymeric or discrete structure nature. At room temperature, the three solid complexes show Htrz‐based intraligand fluorescent emission.
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