Exploratory Synthesis in Molten Salts: Role of Flux Basicity in the Stabilization of the Complex Thiogermanates Cs₄Pb₄Ge₅S₁₆, K₂PbGe₂S₆, and K₄Sn₃Ge₃S₁₄.

Abstract

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Solvothermal Syntheses and Characterizations of Four Quaternary Copper Sulfides BaCu3MS4 (M = In, Ga) and BaCu2MS4 (M = Sn, Ge)

“…As an important class of inorganic materials, quaternary sulfides have fascinating application prospects in many fields. − During the past decades, considerable progress has been made in the syntheses of quaternary sulfides. − The frameworks of these sulfides are usually composed of main group elements (In, Ga, Sn, Ge, As, Sb) and transition metal elements (Cu, Ag, Zn, Cd, Hg). − Quaternary sulfides are attractive to researchers because of their compositional and structural diversities, which provide more opportunities for discovering new functional materials. ,, …”

Synthesis and Characterizations of Two Tellurides β-BaGa2Te4 and Ba5Ga2Ge3Te12 with Flexible Chain Structure

“…However, the four-fold tetrahedra (MQ 4 ) is the most common coordination mode . These MQ 4 tetrahedra can exist independently in the structure or form [M 2 Q 7 ] dimer, [M 2 Q 6 ] moieties, tetramer [M 4 Q 10 ] clusters or even 1D chains via sharing corners or edges. Compounds, such as Na 4 SnTe 4 and Na 5 InTe 4 , contain discrete units of [SnTe 4 4– ] and [InTe 4 5– ], respectively.…”

“…However, the four-fold tetrahedra (MQ 4 ) is the most common coordination mode. 41 These MQ 4 tetrahedra can exist independently in the structure or form [M 2 Q 7 ] dimer, 42 48 and the infinite chains of [MTe 3 3− ] and [GeTe 3…”

Thioaluminogermanate M(AlS2)(GeS2)4 (M = Na, Ag, Cu): Synthesis, Crystal Structures, Characterization, Ion-Exchange and Solid-State 27Al and 23Na NMR Spectroscopy

“…1 7 Many of these compounds feature interesting physical and chemical properties and have found application in different areas. For instance, Cs4Pb4Ge5S16 has been used as cathodoluminescent, 8 Li2Ga2GeS6 shows second-harmonic generation (SHG) response, 9 Cu2ZnGeS4 demonstrates photocatalytic activity for H2 evolution, 10 and the recently reported high surface area porous MAu2GeS4-chalcogel (M = Co, Ni) heterogeneous hydroamination catalysts prepared from K2Au2GeS4. 11 The structural chemistry of chalcogenogermanates was successfully extended to the aluminosilicate relatives (zeolite-like chalcogenides), 12 by the insertion of Al 3+ cations into the chalcogenogermanate framework.…”

“…[15][16][17][18] One of the most powerful methods is the reactive molten alkali metal polysulfide flux, which has been employed in the exploratory synthesis of a large set of ternary and quaternary thiogermanates. 8,19 The advantage of using alkali metals is primarily due to their reactivity with sulfur at lower temperatures and their influence on the dimensionality and the crystallinity of the subject compounds. 20 Due to their rich compositional diversity, broad structural flexibility and soft S 2ligands, the metal sulfides attracted considerable attention as ion-exchange materials for industrial and environmental applications.…”