Synthesis, Thermal Stability and Magnetic Properties of an Interpenetrated Mn(II) Triazolate Coordination Framework

• Published in: Zeitschrift für anorganische und allgemeine Chemie (1950) 2022-08, Vol.648 (16), p.n/a
• Main Authors: Röß‐Ohlenroth, Richard, Hirrle, Marcel, Kraft, Maryana, Kalytta‐Mewes, Andreas, Jesche, Anton, Krug von Nidda, Hans‐Albrecht, Volkmer, Dirk
• Format: Article
• Language: English
• Subjects: Benzotriazole; Coordination; coordination framework; Diffraction; Isopropanol; Ligands; Magnetic properties; manganese; metal-organic framework; microporous materials; Phase transitions; Thermal stability; Thermogravimetric analysis; Topology; Triazoles
• ISSN: 0044-2313; 1521-3749
• DOI: 10.1002/zaac.202200153

Coordination frameworks and metal‐organic frameworks built from simple triazole ligands such as 1H‐1,2,3‐triazole (H‐ta) have recently inspired great interest owing to physical phenomena such as electronic conductivity, phase transitions and their magnetic behavior. In line of our endeavors we report on the solvothermal reaction of MnCl2 ⋅ 4H2O with H‐ta ligand in isopropyl alcohol leading to the the novel CFA‐23 (((propan‐2‐yl)oxidanium)+[Mn6Cl5(ta)8]−; CFA‐23=Coordination Framework Augsburg University‐23) coordination framework. Single‐crystal X‐ray diffraction (SC‐XRD) reveals that it crystallizes in the tetragonal space group P42/nnm (134) exhibiting a two‐fold interpenetrated framework with the topologies of a dia net with point (Schläfli) symbol 66. The thermal stability of this compound was investigated using variable temperature X‐ray powder diffraction and thermogravimetric analysis. The magnetic properties of CFA‐23 differ from a similar non‐interpenetrated literature structure of the composition (H[Mn6(bta)8Cl5] ⋅ (H2O)4) built from 1H‐1,2,3‐benzotriazole, thus, indicating that sterically induced lattice changes might be an adjustment parameter for magnetic properties in such frameworks.