Details

Autor(en) / Beteiligte

• An, Suosuo
• Meng, Shuang
• Xue, Jiadan
• Wang, Huigang
• Zheng, Xuming
• Zhao, Yanying

Titel

UV–Vis, Raman spectroscopic and density functional theoretical studies on microsolvation 1, 2, 4-triazole-3-thione clusters

Ist Teil von

• Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2021-09, Vol.258, p.119762, Article 119762

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •1, 2, 4-triazole-3-thione (3TT) is investigated in different enviroments.•Microsolvation clusters in solvents were confirmed.•The >NH⋅⋅⋅O and >C=S⋅⋅⋅H hydrogen bonding are the key constituents of thione structure.•Raman and absorption shifts in different solvents are interpreted.•The hydrogen bond sites are confirmed to be located on the functional group S = C–NH– of 3TT. Photophysical and photochemical reactions of microsolvation clusters are attracting an increasing attention due to their wide applications in materials science and biology. In this paper, 1, 2, 4-triazole-3-thione (3TT) is investigated in solid, protic, and aprotic solvents using FT-Raman, resonance Raman and electronic absorption spectroscopic experiments. The structures of microsolvation clusters in solvents were confirmed by 488 nm Raman spectroscopy combining with density functional theory (DFT) calculation. Steady-state absorption and resonance Raman spectra of 3TT in different environments indicate that the intermolecular hydrogen bonding may reveal important insights in the photophysical and photochemical process. With the aid of DFT and time-dependent density functional theory (TDDFT) calculations, we assigned the observed Raman spectra to the microsolvation clusters in acetonitrile, water and methanol, and carried out preliminary investigations on spectrum shifts of UV and Raman spectra due to the hydrogen bonding with the solvent molecules. The intermolecular >NH···O and >=S···H hydrogen bonding interactions, which are the key constituents of stable thione structure of 3TT, revealed the obvious spectrum shifts of 3TT, including Raman and absorption shifts in CH3CN, CH3OH and H2O. The hydrogen bond sites were further confirmed to be located on the functional group SCNH of 3TT with CH3CN, H2O and CH3OH.