Details

Autor(en) / Beteiligte

• Yushina, I.D.
• Krylov, A.S.
• Bol'shakov, O.I.
• Rakitin, O.A.
• Bartashevich, E.V.

Titel

High-pressure transformation of dithiazolylidene-dithiazolium polyiodide with N-H…N hydrogen bond: A Raman Spectroscopy study

Ist Teil von

• Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2022-03, Vol.268, p.120635, Article 120635

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Dithiazolium zigzag polyiodide I3-…I2…I3- undergoes phase transition above 1.5 GPa.•High pressure transformations are due to the increased association within I82- anion.•The emergence of the band at 159 cm−1 is the effect of N-H…N vibrations. The insight into the behavior of polyiodides under non-ambient conditions can enrich the practical applications due to obtaining materials with adjustable and tunable conducting properties. In this work Raman spectroscopy study in the range 0 – 6.5 GPa has been performed for dithiazolylidene-dithiazolium zigzag polyiodide with N-H…N hydrogen bond. Variations of band positions in the low-wavenumber region of Raman spectra have been attributed to the changes in the anionic part of the unit cell. The association of different interacting polyiodide subunits at pressure above 1.5 GPa leads to the emergence of the bands at 98 and 115 cm−1 due to consistent vibrations in the I82- zigzag. The emergence of the band at 159 cm−1 above 0.28 GPa can be assigned to N-H…N hydrogen bond vibration. The obtained results depict undergoing structure transformations: the stronger are cation…cation and anion…anion interactions the more likely is the observation of conducting properties due to the formation of polyiodide zigzag and strongly-bound hydrogen-bonded fragment.