Funct. Mater. 2020; 27 4: 681-686.

doi:https://doi.org/10.15407/fm27.04.681

Solution growth and characterization of high-quality organic 4-N,N'-dimethylamino-N-methyl-4-stilbazolium tosylate crystals

G.N.Babenko1, A.P.Voronov1, E.F.Dolzhenkova1, V.S.Zadorozhny1, I.M.Pritula1, R.Galbadrakh2, L.Enkhtor2

1Institute for Single Crystals, STC Institute for Single Crystals, National Academy of Sciences of Ukraine, 60 Lenin Ave., 61001 Kharkiv, Ukraine
2Department of Physics, School of Arts and Sciences, National University of Mongolia, 14201 Ikh Surguuliin gudamj1, Sukhbaatar district, Ulaanbaatar, Mongolia

Abstract: 

High-quality 4-N,N'-dimethylamino-N-methyl-4-stilbazolium tosylate crystals has been grown onto a seed from supersaturated methanol solution by controlled temperature lowering method. XRD studies confirm structural perfection of the grown crystals. The functional groups of DAST were identified by FTIR studies. The average values of microhardness obtained on the surface and on the cleaved facet of the grown crystals are different and amount 28.1 and 32.6 kgf/mm2, respectively. There is established a correlation between the values of microhardness and the character of distribution of dislocations in the DAST crystals.

Keywords: 
organic crystals, structural perfection, microhardness, dislocation density.

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