Two dimensional coordination polymers based on 3,5-di(1H-imidazol-1-yl)pyridine and their fluorescence properties

摘要

The solvothermal synthesis of three new 2D MOFs is reported. From the reaction of 3,5-di(1H-imidazol-1-yl)pyridine (dip) and the metal salts Co(NO3)(2)center dot 6H(2)O, Cd(NO3)(2)center dot 4H(2)O or Zn(NO3)(2)center dot 4H(2)O, the three MOFs [Co(diP)(2)(SCN)(2)] (1), {[Cd(dip)(2)(H2I)(2)]center dot(NO3)(2)} (2), {[Zn(dip)(2)(H2O)(2)]center dot(ClO4)(2)} (3) were obtained. For these 2D MOFs, all the metal ions adopt a six-coordinate octahedral geometry with axial coordination sites occupied by SCN- or water molecules. The SCH-/water ligands were all mono-coordinate and led to layered MOF structures. Furthermore, the fluorescence properties of 2 and 3 have been investigated. (C) 2020 Elsevier B.V. All rights reserved.