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1,2,4‐Triazole Controlled Cd II /Mn II Complexes with Discrete Mononuclear, Polymeric 1D Chain, and 2D Layer Motifs
Author(s) -
Liang QingQing,
Liu ZhengYu,
Yang EnCui,
Zhao XiaoJun
Publication year - 2009
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200900145
Subject(s) - chemistry , crystallography , supramolecular chemistry , crystal structure , molecule , single crystal , thermal stability , fluorescence , organic chemistry , physics , quantum mechanics
Three Htrz‐based metal complexes, [Cd(trz)(CH 3 OH)(nb)] n ( 1 ), [Cd(Htrz)(H 2 O)(nb) 2 ] n ( 2 ), and {[Mn(Htrz) 2 (H 2 O) 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 μ N1,N2,N4 ‐bridging trz anions and Cd II ions. Complex 2 presents a 1D polymeric chain structure bridged by bidentate μ N1,N4 ‐bridging Htrz molecule and Cd II ions, whereas compound 3 is a supramolecular assembly containing a mononuclear [Mn(Htrz) 2 (H 2 O) 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.