New Organic-Inorganic Salt Based on Fluconazole Drug: TD-DFT Benchmark and Computational Insights into Halogen Substitution

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Ferjani H., Bechaieb R., Alshammari M., Lemine O. M., DEGE N.

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, vol.23, no.15, 2022 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 15
  • Publication Date: 2022
  • Doi Number: 10.3390/ijms23158765
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, CAB Abstracts, EMBASE, Food Science & Technology Abstracts, MEDLINE, Veterinary Science Database, Directory of Open Access Journals
  • Keywords: crystal structure, fluconazole drug, salt, spectroscopy, optical and magnetic studies, DFT, TD-DFT, chemical reactivity descriptors, ICT, GENERALIZED GRADIENT APPROXIMATION, SENSITIZED SOLAR-CELLS, CRYSTAL-STRUCTURES, DENSITY, COCRYSTALS, COMPLEXES
  • Ondokuz Mayıs University Affiliated: Yes


In this study, we report the synthesis of a new organic-inorganic molecular salt of the clinically used antifungal drug fluconazole, (H2Fluconazole).SnCl6.2H(2)O. By detailed investigation and analysis of its structural properties, we show that the structure represents a 0D structure built of alternating organic and inorganic zig-zag layers along the crystallographic c-axis and the primary supramolecular synthons in this salt are hydrogen bonding, F center dot center dot center dot pi and halogen bonding interactions. Magnetic measurements reveal the co-existence of weak ferromagnetic behavior at low magnetic field and large diamagnetic contributions, indicating that the synthesized material behaves mainly as a diamagnetic material, with very low magnetic susceptibility and with a band gap energy of 3.6 eV, and the salt is suitable for semiconducting applications. Extensive theoretical study is performed to explain the acceptor donor reactivity of this compound and to predict the Cl-substitution effect by F, Br and I. The energy gap, frontier molecular orbitals (FMOs) and the different chemical reactivity descriptors were evaluated at a high theoretical level. Calculations show that Cl substitution by Br and I generates compounds with more important antioxidant ability and the intramolecular charge transfer linked to the inorganic anion.