Three Co(II) coordination polymers constructed from 2,5-di(4-pyridyl)thiazolo[5,4-d]thiazole and V-shaped dicarboxylic acids: Syntheses, characterizations, structural diversity and optical properties


POLYHEDRON, vol.163, pp.77-83, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 163
  • Publication Date: 2019
  • Doi Number: 10.1016/j.poly.2019.02.021
  • Journal Name: POLYHEDRON
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.77-83
  • Keywords: Co(II) coordination polymer, V-shaped dicarboxylate, 2,5-Di(4-pyridyl)thiazolo[5,4-d]thiazole, Optical band gap, Structural diversity, METAL-ORGANIC FRAMEWORKS, SORPTION, FLUORESCENCE, MOLECULES, BLOCKS, DESIGN
  • Ondokuz Mayıs University Affiliated: Yes


Three novel Co(II) coordination polymers, formulated as {[Co(mu(3)-ipa)(mu-dptztz)]center dot DMF)(n) (1), {[Co(mu(3)-fdc)(mu-dptztz)(H2O)]center dot DMF}(n) (2) and {[Co(mu(3)-tdc)(mu-dptztz)]center dot G}(n) (3) (ipa: 1,3-benzenedicarboxylate, fdc: 2,5-furandicarboxylate, tdc: 2,5-thiophenedicarboxylate, dptztz: 2,5-di(4-pyridyl)thiazolo[5,4-d]thiazole, G: Guest solvent molecule) were synthesized with dptztz and V-shaped dicarboxylic acids to investigate the effects of these acids on the structural diversity. Single crystal X-ray results demonstrated that compound 1 has a 2D structure, while compounds 2 and 3 display 3D frameworks, depending on these acids. In 1 and 3, although the coordination modes of the ipa and tdc ligands are the same, different dimensions in the compounds are observed owing to the different angles between the two carboxylate arms of the linkers. Moreover, the dimensionalities of the compounds increased with the angle between two carboxylate arms. 3D networks of compound 3 are interpenetrated with each other to form a 3D + 3D -> 3D interpenetrated framework with a pcu topology. Diffuse reflectance spectra showed that the optical band gaps of the compounds decreased in the presence of the dptztz ligand. Furthermore, the thermal properties of compounds 1-3 were also studied. (C) 2019 Elsevier Ltd. All rights reserved.