Synthesis, optical dye properties and band gap energies of silver hydroxy‑aryl thiazolo[5,4-d]thiazole complexes

Olgun U., DİKMEN Z., Çetin H., Arıcan F., Gülfen M.

Journal of Molecular Structure, vol.1250, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 1250
  • Publication Date: 2022
  • Doi Number: 10.1016/j.molstruc.2021.131816
  • Journal Name: Journal of Molecular Structure
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, INSPEC
  • Keywords: Hydroxy-aryl-thiazolo[5, d ]thiazole dyes, Silver complexes, UV, vis, absorption, FT-IR, Cyclic voltammetry, Band gap energy, CONDUCTIVITY, SPECTROSCOPY, VOLTAMMETRY, POLYMERS
  • Eskisehir Osmangazi University Affiliated: Yes


© 2021 Elsevier B.V.In the present work, phenyl-, o‑hydroxy phenyl-, o,p‑hydroxy phenyl-, p‑hydroxy phenyl- and o‑hydroxy naphtyl-thiazolo[5,4-d]thiazole dye molecules and their silver complexes were synthesized. The optical microscopy, UV–vis. absorption spectroscopy, FT-IR spectroscopy, cyclic voltammetry (CV) and the band energies of the synthesized aryl / hydroxy aryl thiazolo[5,4-d]thiazole molecules and their silver complexes were studied. The HOMO and LUMO energy levels were obtained from the CV voltammograms. The optical band gap (EgOpt.) and the electrochemical band gap (EgCV) energies were calculated from the UV–vis. absorption and CV, respectively. It was found that the presence of the hydroxy aryl groups of thiazolo[5,4-d]thiazole unit and the silver coordination have changed the UV–vis. absorption spectra and the band gap energies of the thiazolo[5,4-d]thiazole molecules. Among the studied thiazolo[5,4-d]thiazole molecules and their silver complexes, the band gap energies were obtained as Egopt = 2.07 eV and EgCV = 1.67 eV for silver bis(p‑hydroxy-pheyl)-thiazolo[5,4-d]thiazole (Ag2[p-(OH)2-Ph2TT]), and Egopt = 2.07 eV and EgCV = 1.31 eV for bis(o‑hydroxy-napthyl)-thiazolo[5,4-d]thiazole (Ag2[o-(OH)2[sbnd]Naph2TT]) complexes. As a result, these thiazolo[5,4-d]thiazole molecules and their silver complexes are possible canditate dye materials for the photovoltaic solar cells.