Three zinc(II) and cadmium(II) complexes containing 4‐amino‐3, 5‐bis(pyridin‐2‐yl)‐1, 2, 4‐triazole and polynitrile ligands: synthesis, molecular and supramolecular structures, and photoluminescence properties. Issue 9 (7th August 2017)

• Record Type: Journal Article
• Authors: Setifi, Zouaoui; Zambon, Daniel; Setifi, Fatima; El-Ghozzi, Malika; Mahiou, Rachid; Glidewell, Christopher
• Is Part Of: Acta crystallographica. Volume 73:Issue 9(2017)
• Page Start: 674
• Page End: 681
• Publication Date: 2017-08-07
• Subjects: solvothermal synthesis -- polynitrile ligands -- crystal structure -- hydrogen bonding -- π–π stacking interactions -- photoluminescence; Crystallography -- Periodicals; Crystals -- Periodicals; 548.3
• DOI: 10.1107/S2053229617011391
• Languages: English
• ISSNs: 2053-2296

Abstract

Abstract : Three complexes containing either Zn II or Cd II coordinated by 4‐amino‐3, 5‐bis(pyridin‐2‐yl)‐1, 2, 4‐triazole and polynitrile ligands have been synthesized, their structures determined and their photoluminescence properties explored. Abstract : Three photoluminescent complexes containing either Zn II or Cd II have been synthesized and their structures determined. Bis[4‐amino‐3, 5‐bis(pyridin‐2‐yl)‐1, 2, 4‐triazole‐κ 2 N 1, N 5 ]bis(dicyanamido‐κ N 1 )zinc(II), [Zn(C12 H10 N6 )2 (C2 N3 )2 ], (I), bis[4‐amino‐3, 5‐bis(pyridin‐2‐yl)‐1, 2, 4‐triazole‐κ 2 N 1, N 5 ]bis(dicyanamido‐κ N 1 )cadmium(II), [Cd(C12 H10 N6 )2 (C2 N3 )2 ], (II), and bis[4‐amino‐3, 5‐bis(pyridin‐2‐yl)‐1, 2, 4‐triazole‐κ 2 N 1, N 5 ]bis(tricyanomethanido‐κ N 1 )cadmium(II), [Cd(C12 H10 N6 )2 (C4 N3 )2 ], (III), all crystallize in the space group P, with the metal centres lying on centres of inversion, but neither analogues (I) and (II) nor Cd II complexes (II) and (III) are isomorphous. A combination of N—H…N and C—H…N hydrogen bonds and π–π stacking interactions generates three‐dimensional framework structures in (I) and (II), and a sheet structure in (III). The photoluminescence spectra of (I)–(III) indicate that the energies of the π–π* transitions in the coordinated triazole ligand are modified by minor changes of the ligand geometry associated with coordination to the metal centres.