A New Tripodal Zwitterionic Ligand-Based Cationic Manganese(II) Metal-Organic Framework: Synthesis, Characterization and Photochromic Property

A new flexible tripodal 1,1′,1′′-(((1,3,5-triazin-2,4,6-triyl)tris(benzene-4,1-diyl))tris(methylene))tris(3-carboxypyridin-1-ium) bromide (H₃taznaBr₃) ligand and its new Manganese(II) compound, namely {[Mn(µ₆-tazna)]Cl₂·4H₂O}_n (OGU − 1, OGU: Osmangazi University), were synthesized and structurally characterized by IR spectroscopy, elemental analysis, X-ray single-crystal and powder diffraction techniques. Single crystal X-ray diffraction analysis revealed that the OGU − 1 is 3D framework, possessing 1D channels along the b-axis with dimensions of 9.39 × 13.63 Ų, in which 1D channels are filled with chloride ions and lattice water molecules. The OGU − 1 displayed a 6,6-connected net with a point symbol of {4⁸.6⁶.8}{4⁹.6⁶}. Furthermore, thermal (TG, DTA and DTA) and photochromic properties of the OGU − 1 were investigated and it exhibited color change under 365 nm UV light.