Structural Tuning and Piezoluminescence Phenomenon in Trithiocyanuric Acid

Abstract

As an essential thermodynamic variable, pressure has a powerful ability to accurately control molecular structures and properties by modulating the noncovalent interactions therein. Based on this point, we utilized pressure to tune the structure and properties of trithiocyanuric acid (C 3 H 3 N 3 S 3 , TTCA), gaining deeper insight into its structural nature and structure−property relationships. During compression, layered TTCA undergoes molecular distortion and relative slippage between interlayers, as well as anisotropic and stepwise shrinkage of intralayer six-molecule rings. Importantly, these structural variations have a great influence on the luminescence properties of TTCA. Piezoluminescence is observed above ∼4 GPa, acompanied by the calculated shifting of valence-band top. In experiments, detailed stepwise compression of the intralayer structure was captured directly. The observations combine the microscopic structure and macroscopic properties together and are beneficial for the further design of luminescence materials, as well as pressure sensors and pressure switches.

High-Pressure Effects on Hofmann-Type Clathrates: Promoted Release and Restricted Insertion of Guest Molecules

“…On the basis of the unit cell information and the phase transition mechanism, it is inferred that the high-pressure phase of Ni−Bz is likely to be the further atomic adjusting or The evolution of lattice parameters in Figure 5 shows that the compression of the c axis (Figure 5c,f) is much more dramatic than for the a (Figure 5a,d) and b (Figure 5b,e) axes, which results from the relatively weak interactions between the layers. 34 In the presence of guest molecules, Ni−Ni exhibits less compressibility of the intralayer framework (along a axis) and a more significant contraction of the interlayer space (along c axis), all of which are indicative of the failed guest insertion at high pressure. Such differences between different experimental runs could be induced only by the different pressure conditions.…”

“…During compression, no phase transition is observed in the ADXRD patterns up to the pressure of ∼10 GPa (Figures S7 and S8), reflecting the more stable nature of the offset stacking in Ni–Ni than the direct stacking in Ni–Bz. The evolution of lattice parameters in Figure shows that the compression of the c axis (Figure c,f) is much more dramatic than for the a (Figure a,d) and b (Figure b,e) axes, which results from the relatively weak interactions between the layers . In the presence of guest molecules, Ni–Ni exhibits less compressibility of the intralayer framework (along a axis) and a more significant contraction of the interlayer space (along c axis), all of which are indicative of the failed guest insertion at high pressure.…”

Enhancing flotation of smithsonite by using 1,3,5-Triazinane-2,4,6-trithione as sulfidation

“…Thus, Zn 2+ was intensively re-adsorbed on the smithsonite surface. Compared with the molecular structure of Na2S and TMT, the increased S sites of TMT for the adsorption of Zn 2+ are the main cause (Li et al, 2017). When one S atom in the TMT molecule was adsorbed on the mineral surface, the other two S atoms could combine with the Zn 2+ in the pulp .…”

Synthesis of Thiocyameluric Acid C6N7S3H3, Its Reaction to Alkali Metal Thiocyamelurates and Organic Tris(dithio)cyamelurates

“…For example, sodium thiocyanurate C 3 N 3 S 3 Na 3 , which has several trade names and synonyms such as TMT (from trimercapto‐ s ‐triazine trisodium salt), is used as an effective substance to remove heavy metals from soils or wastewater . In recent reports it was used for electrochemical As III assays, piezoluminescent materials, for hydrogen evolution electrocatalysts, for catalysts for efficient oxygen reduction reactions in fuel cells, for sulfur‐rich cathode materials for lithium–sulfur batteries, for corrosion protection of copper, to name only a few examples.…”

“…Thiocyameluric acid as the key compound of sulfur substituted s-heptazines is notk nown until now.C ontrarily,t hiocyanuric acidC 3 N 3 S 3 H 3 and its derivatives, especially the trisodium salt, are well known and used industrially.F or example, sodium thiocyanurate C 3 N 3 S 3 Na 3 ,w hich has several trade names and synonyms such as TMT (from trimercapto-s-triazine trisodium salt), is used as an effective substance to removeh eavy metals from soils or wastewater. [25] In recent reports it was used for electrochemical As III assays, [26] piezoluminescent materials, [27] for hydrogen evolution electrocatalysts, [28] for catalysts for efficient oxygen reduction reactions in fuel cells, [29] for sulfur-rich cathodem aterials for lithium-sulfur batteries, [30] for corrosion protection of copper, [31] to name only af ew examples.…”