Luminescent 2D+2D -> 2D Interpenetrated Zn(II)-Coordination Polymer Based on Reduced Schiff Base Tricarboxylic Acid and Bis(imidazole) Ligand for Detection of Picric Acid and Fe3+ Ions


CRYSTAL GROWTH & DESIGN, vol.17, no.10, pp.5499-5505, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 10
  • Publication Date: 2017
  • Doi Number: 10.1021/acs.cgd.7b01024
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.5499-5505
  • Eskisehir Osmangazi University Affiliated: Yes


New bifunctional luminescent coordination polymer, formulated as {[Zn (mu-HCIP) (mu-pbix)]center dot 2H(2)O} (1) (H3CIP = 5-(4-carboxybenzylamino)isophthalic acid, pbix: 1,4-bis(imidazol-lylmethyl)benzene), was synthesized under solvothermal conditions by using reduced Schiff base and neutral pbix ligands and characterized by IR spectroscopy, elemental analysis, single-crystal and powder X-ray diffraction, and thermal analysis. X-ray results indicated that the HCIP ligand acted as a bidentate bridging ligand and was partly deprotonated in 1. Complex 1 exhibited a 2D + 2D -> 2D interpenetrated structure with sql topology. Complex 1 displayed high emission at the solid state. Luminescence titration experiments showed that complex 1 dispersed in dimethylformamide (DMF) detected the picric acid in the presence of other interfering nitroaromatic compounds with a detection limit of 56.46 ppb. In addition, complex 1 displayed highly sensitive and selective detection toward Fe3+ ion in the presence of other interfering metal ions. The detection limit of 1 for Fe3+ ion sensing in DMF suspension was 0.208 ppm. The result showed that complex 1 could be used as a fluorescent sensor for the detection of picric acid and Fe3+ ion.