First Examples of Gold Thiocadmates: A2Au2Cd2S4 (A=Rb, Cs) and K2Au4CdS4: Bright Photoluminescence from New Alkali Metal/Gold Thiocadmates

Abstract

The synthesis of Cs

d6versus d10, Which Is Better for Second Harmonic Generation Susceptibility? A Case Study of K2TGe3Ch8 (T = Fe, Cd; Ch = S, Se)

“…The Ge–S bond distances in K 2 CdGe 3 S 8 fall into the range of 2.160(1)–2.261(1) Å, which are comparable to many germanium-sulfides such as K 2 FeGe 3 S 8 (2.181–2.239 Å), KBiGeS 4 (2.181–2.239 Å), Cs 4 GeP 4 S 12 (2.209–2.232 Å), K 2 ZnGe 3 S 8 (2.148–2.285 Å), KLaGeS 4 (2.175–2.220 Å), K 2 MnGe 3 S 8 (2.125–2.288 Å), Na 5 AgGe 2 S 7 (2.189–2.247 Å), La 4 Ge 3 S 12 [2.196(7)–2.241(7) Å], Ba 6 (Cu 1.9 Mg 1.1 )­Ge 4 S 16 [2.174(8)–2.227(5) Å], and so forth. The Cd–S bond distances within [CdS 4 ] tetrahedra of K 2 CdGe 3 S 8 are 2.486(5)–2.537(5) Å, which agree well with many cadmium-sulfides such as KCd 4 Ga 5 S 12 (2.335–2.429 Å), , K 2 AuCdS 4 (2.597 Å), K 2 Cd 3 S 4 (2.473–2.640 Å), and so forth.…”

One-Dimensional Double Chains in Sodium-Based Quaternary Chalcogenides Displaying Intriguing Red Emission and Large Optical Anisotropy

“…We can fine no explicit reason for this change in fluorescence lifetimes between title compounds and ACd 4 Ga 5 S 12 compounds, but ACd 4 Ga 5 S 12 compounds have more disorder locations (three Cd/Ga) than one Cd/M III in title compounds that induces the change in fluorescence lifetimes mentioned above. In comparison with these reported chalcogenides, several of them show similar fluorescence emission, for example, ACd 4 Ga 5 S 12 (A = K, Rb, or Cs) (yellow, 584−595 nm), 8 Ba 6 Zn 7 Ga 2 S 16 (yellow, 600 nm), 10 Rb 2 Au 2 Cd 2 S 4 (red, 624 nm),49 Ba 8 Zn 4 Ga 2 S 15 (yellow, 593 nm), 11 K 2 Cd 3 S 4 (red, 646 nm),50 BaCdSnS 4 (yellow, 530 nm), and Ba 3 CdSn 2 S 8…”