Study of novel mesostructured materials based on tin(IV) sulfide Part 1.—Synthesis and characterization

Abstract

Two novel mesostructured materials based on tin(IV) sulfide (C₁₆TMA–SnS–L and C₁₆TMA–SnS–M) have been synthesized in the system C₁₆TMABr–SnCl₄–Na₂ S–H₂O (C₁₆TMABr, cetyltrimethylammonium bromide) at ambient temperature. These materials were characterized by XRD, atomic force microscopy (AFM), FTIR, ¹¹⁹Sn MAS NMR, ¹³C CP MAS NMR, energy-dispersive X-ray (EDX) analysis and bulk chemical analysis. The lamellar phase C₁₆TMA–SnS–L whose chemical composition is C₁₉H₄₂NSnS_2.5 was formed in the system containing a large amount of surfactant or mixtures of a little of surfactant and some TMABr. However, it is necessary to use a very low concentration of surfactant in the reaction mixtures for the formation of the other new mesostructured phase C₁₆TMA–SnS–M with a S/Sn ratio of 2. ¹¹⁹Sn MAS NMR indicates that the coordination of tin(IV) in these two mesostructured materials is very different, i.e. tetrahedral in C₁₆TMA–SnS–L and octahedral in C₁₆TMA–SnS–M. Different environments of the aliphatic chains of the surfactant were confirmed by ¹³C CP MAS NMR.

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