A novel copper-rich open-framework chalcogenide constructed from octahedral Cu₄Se₆ and icosahedral Cu₈Se₁₃ nanoclusters

Abstract

We demonstrated a unique copper-rich open-framework chalcogenide constructed from icosahedral Cu8Se13 and octahedral Cu4Se6 nanoclusters connected to each other through a SnSe3(Se2) bridging unit. The specific copper-rich composition gives rise to a narrow band gap and photoelectrical responsive properties in the infrared range.

Structural Expansion of Chalcogenido Tetrelates in Ionic Liquids by Incorporation of Sulfido Antimonate Units

“…The 'accessible' void matches relatively well the volume of 16 (C 4 C 1 C 1 Im) + cationsp er formula unit, hence 128 cations within the unit cell ( % 28160 3 for an estimated 20 3 per C or Na tom), given that there are additional voids between the cation molecules. Although we cannote xclude with certainty the presence of K + cations as counterions betweent he anionic assemblies, we can excludet he presence of any cations between the [Ge 2 Sb 2 S 7 ] 2À and [GeS 4 ] 4À units of one such assembly,g iven the small interatomicd istances between them (see above).…”

“…16À }a ssemblies are separated from each other by the counterions. Although not crystallographically detectable owing to heavy disorder (which is rather commoni ns alts obtained from ionothermal syntheses), we assume that the counterions be (C 4 C 1 C 1 Im) + ,b ased on the volumeo fthev oids between the anionic assemblies (30530.3 3 according to accessible void calculations done with PLATON). [43] We note that we cannote xclude af ractiono f2 -3 counterions to be K + ,b ased on as mall Ka bundance ( % 4at%)i nt he m-XRF spectrum ( Figure S2, Ta ble S1).…”

“…We report aboutthe successful incorporation of (formally) Sb 3 anions are linked to form supertetrahedral Sn/O/S clusters in the substructure of 2.B oth compounds comprise furthera nionic subunits involving Sb III ,w ith an oradamantanetype ternary anion in 1 and ac yclic moiety in 2.T he sulfido (semi)metallate units form complex (non-bonded) assemblies of at otal of seven ternary Ge/Sb/S and binary Ge/S anions in 1 and polymeric 1D-strands of alternating Sn/O/S and Sb/S units in 2.O wing to ah ight endency for disorder of the (C 4 C 1 C 1 Im) + molecules, the counterions could only be located in the crystal structure of 2b,c omprising (C 4 C 1 C 2 Im) + .H owever,R aman spectra served to corroboratet he presence of ionic liquid cations in the other salt. Raman spectra of all three compounds in comparison with that of recently reported Figure 8.…”

“…Metal chalcogenide compounds possess av ariety of desirable properties, mostly based on their intrinsic semiconducting, photo-conducting or ion conducting properties. [1][2][3][4][5][6][7][8][9] However, beside the native features of corresponding binary M x E y compounds( M= d-block or p-block (semi)metal, E = O, S, Se, or Te ), the combinationo fd ifferent Mo rd ifferentEatoms, and the formation of chalcogenido( semi)metalates by (formal) incorporation of Cat 2 E( Cat = alkali metal or non-metal cation) can be used to additionally tune the corresponding structurala nd electronic properties. [10][11][12][13][14][15] In order to achieve at argeted synthesis of such compounds, variouss ynthetic methods have been applied.…”

Two new phases in the ternary RE–Ga–S systems with the unique interlinkage of GaS4building units: synthesis, structure, and properties

“…[37][38][39][40][41][42][43][44] Moreover, Lu 5 GaS 9 exhibits a stronger transient photocurrent response which is about 3 times larger than that of Yb 6 Ga 4 S 15 . These data are smaller than those of ReSe 8 Br 2 (9 μA cm −2 ), 45 CuSnSe-1 (3 μA cm −2 ), 46 [Ru(bpy) 3 ][Cd 17 S 4 (SPh) 28 ] (0.6 μA cm −2 ), 40 and ReS 8 Br 2 (0.3 mA cm −2 ), 45 but wider than those of BaCuSbS 3 (55 nA cm −2 ) 44 and BaCuSbSe 3 (30 nA cm −2 ). 44…”