Vibrational spectroscopic and crystallographic study of the novel guanylurea salts with sulphuric and selenic acids

0473765 - FZÚ 2018 RIV NL eng J - Journal Article
Matulková, I. - Fridrichová, M. - Císařová, I. - Vaněk, Přemysl - Uhlík, F. - Němec, I.
Vibrational spectroscopic and crystallographic study of the novel guanylurea salts with sulphuric and selenic acids.
Journal of Molecular Structure. Roč. 1131, Mar (2017), s. 294-305. ISSN 0022-2860. E-ISSN 1872-8014
R&D Projects: GA ČR GA14-05506S
Institutional support: RVO:68378271
Keywords : guanylurea(l plus ) sulphates * guanylurea(l plus ) hydrogen selenate * crystal structure * IR spectra * Raman spectra * phase transition
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.011, year: 2017

The family of known guanylurea(1+) sulphates was extended for two novel triclinic (space group P-1) members bis(guanylurea(1+)) sulphate dihydrate and tetrakis(guanylurea(1+)) bis(hydrogen sulphate) sulphate. Additionally, the monoclinic (space group P2(1)/n) guanylurea(1+) hydrogen selenate was also isolated and characterised. Besides of X-ray diffraction study these novel guanylurea chalcogenates were studied by the methods of vibrational spectroscopy. The study of thermal behaviour of the prepared salts revealed reversible lambda-shaped anomaly for tetrakis(guanylurea(1+)) bis(hydrogen sulphate) sulphate at 354 K. This effect was studied in detail by the combination of DSC and temperature-dependent IR and Raman spectroscopies.
Permanent Link: http://hdl.handle.net/11104/0270903