The features of iodine loss at high temperatures

The case study of crystalline thiazoloquinolinium polyiodides
  • Irina D. YushinaEmail author
  • D. G. Pikhulya
  • Ekaterina V. Bartashevich


A series of crystalline thiazoloquinolinium iodides has been studied using a combination of thermal analysis, mass and Raman spectroscopy techniques. The influence of composition and polyiodide anion stoichiometry on the features of iodine loss has been revealed. It has been shown that the existence of a bound diiodine molecule in a polyiodide chain leads to significant decrease in melting point and decomposition temperatures in comparison with corresponding mono- and triiodide salts. The loss of the diiodine molecule from the complex polyiodide proceeds independently, without decomposition of the organic cation, while the release of diiodine from the triiodide anion goes simultaneously with thermal decomposition of the cation. In addition, the decomposition processes on the surface of the thiazoloquinolinium polyiodide crystal have been investigated during sample storage. Iodine loss and formation of more stable triiodide have been proved using Raman spectroscopy data.


Thermal analysis Evolved gas analysis Thermal decomposition Thiazoloquinolinium polyiodides Halogen bonding 



This work was supported by grant of Ministry of Education and Science of the Russian Federation (Award No 4.1157.2017/4.6) and by the Government of the Russian Federation, Act 211, contract No. 02.A03.21.0011.

Supplementary material

10973_2019_8442_MOESM1_ESM.doc (178 kb)
Supplementary material 1 (DOC 178 kb)


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.SEC NanotechnologySouth Ural State UniversityChelyabinskRussia
  2. 2.Nonlinear Optics Laboratory, Institute of ElectrophysicsUral Branch of the Russian Academy of SciencesEkaterinburgRussia
  3. 3.Department of OptoinformationSouth Ural State UniversityChelyabinskRussia

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