A pillar-layered chalcogenide framework assembled by [Mn₅S₁₂N₁₂]_n layers and [Sb₂S₅] inorganic pillars

Abstract

Reported here is an attractive pillar-layered metal chalcogenide open framework, in which [Sb2S5] building units act as pillars between [Mn5S12(N2H4)6]n layers. The obtained compound exhibits high stability in both acid...

Crystalline chalcogenidometalate-based compounds from uncommon reaction media

“…In another open-framework chalcogenido metalate, {Sb 2 S 5 } building units act as pillars between 2D-{[Mn 5 S 12 (N 2 H 4 ) 6 ]} layers to form the three-dimensional framework 3D-{[Mn 5 Sb 6 S 15 (N 2 H 4 ) 6 ] 2− }. 118 Its {Mn 12 S 12 } substructure contains 1D hexagonal channels with a diameter of ∼10 Å (disregarding van der Waals radii), in which the counter ions are located (Fig. 8).…”

“…The compound exhibits high stability in acids and bases and performs well in the electrocatalytic oxygen reduction. 118 In 2017, also heavier telluridomercurates were prepared by the hydrazine-solvothermal method, by an one-pot synthesis using tellurium powder as the sole tellurium source. Six new compounds were obtained from this reaction, three of which – the Mn( ii ) complexes [Mn(trien)(N 2 H 4 ) 2 ] 2 [Hg 2 Te 4 ] 2 (trien = triethylenetetramine), [Mn(tepa)(N 2 H 4 )][Hg 4 Te 12 ] (tepa = tetraethylenepentamine), and [Mn(trien){Hg 2 Te 4 }] – show photocatalytic activity (see the application section for a detailed disscussion).…”

All-Inorganic Open-Framework Chalcogenides, A3Ga5S9·xH2O (A = Rb and Cs), Exhibiting Ultrafast Uranyl Remediation and Illustrating a Novel Post-Synthetic Preparation of Open-Framework Oxychalcogenides

“…Materials that can effectively extract and bind uranium will soon be needed to achieve advanced uranium recovery and may even enable future possible uranium extraction from seawater. The oceans contain 3.3 ppb of uranium and thus hold 1000 times more uranium than is recoverable from mining. − Consequently, the development of advanced uranium sorbents is a growing research field that targets uranium recovery and has led already to an impressive diversity of sorbents that include functionalized polymers and silica, porous materials, such as metal–organic frameworks and zeolites, as well as ion-exchange materials. − Recently, layered chalcogenide-based ion-exchange materials have demonstrated great potential for uranium recovery due to their fast kinetics, unprecedented uranium exchange capacity, and overall extremely strong affinity between uranyl ions and the chalcogenide layers. − Layered materials can undergo structural transformations during ion intercalation/deintercalation often upon high cation uptake, while three-dimensional chalcogenide ion-exchange materials can avoid this due to having a rigid framework structure and likely providing selective cavities for trapping radioactive species. , Open-framework chalcogenides, consisting of clusters connected through metal or chalcogen bridges creating pores that are typically occupied by organic cations, are therefore attractive. − Such open chalcogenide frameworks received attention recently as their combination of porosity and chalcogenide-based clusters make them attractive as potential materials for applications in photocatalysis, photoluminescence, X-ray detection, ionic conductors, and semiconductors. − To date, investigations of open-framework chalcogenide materials for their ion-exchange properties are limited to several reports focusing on Cs + and heavy metal (Cd 2+ , Hg 2+ , and Pb 2+ ) ion exchange; ,,− interestingly, the direct synthesis of an all-inorganic open-framework chalcogenide and its use for uranyl ion exchange have not yet been explored.…”