[Ag₁₁₅S₃₄(SCH₂C₆H₄^tBu)₄₇(dpph)₆]: synthesis, crystal structure and NMR investigations of a soluble silver chalcogenide nanocluster

Abstract

The soluble 115 nuclear silver cluster [Ag115S34(SCH2C6H4 tBu)47(dpph)6] was synthesized and fully characterized in solution and in the solid state.

Truly Monodisperse Molecular Nanoparticles of Cerium Dioxide of 2.4 nm dimensions: A {Ce100O167} Cluster

“…There are 28 body Ce atoms in the core, the rest are on the surface. Hence 4 is of a similar size to large nanoclusters of Mo, [29] Ag [30] and Au [31–33] that have been reported.…”

“…There are 28 body Ce atoms in the core, the rest are on the surface. Hence 4 is of a similar size to large nanoclusters of Mo, [29] Ag [30] and Au [31–33] that have been reported. Ce oxidation states and O protonation levels were determined by bond valence sum (BVS) calculations, revealing a Ce 3+ 8 Ce 4+ 92 situation and 18 surface OH − ions. All three low‐index facets of CNPs, namely (111), (110) and (100), are present in 4 . Only the Ce 40 ( 3 ) has previously exhibited all three types. All eight Ce 3+ ions are on the surface and all are in (100) facets, as also found in almost all the smaller MNPs, the exception being Ce 19 where a Ce 3+ is located on a Ce 2 edge joining two (111) hexagons. The capping ligands on (111) facets are H 2 O or PhCO 2 H. Most of the PhCO 2 − /PhCO 2 H binding modes are the same as seen previously in the smaller MNPs, except for two new μ 2 ‐PhCO 2 H and μ 4 ‐PhCO 2 − bridging modes (Figure S4).…”

Facile synthesis of silver alkynide cluster and coordination polymers using picolinic acid as a co-ligand

“…DOSY measurements have previously been used to confirm stability as well as the dissociation behaviour of various silver coordination compounds in solution. [25][26][27] Measurements of 4a using mesitylene as an internal reference give similar diffusion rates for the picolinate and the acetylide ligands (D = 12.12 × 10 −9 m 2 s −1 ), suggesting that both ligands are part of the same entity (Fig. 8).…”

Formation and Structural Diversity of Organo‐Functionalized Tin–Silver Selenide Clusters

“…The syntheses of 2 – 4 can be viewed as an extension of the chemistry of phosphane‐stabilized Ag/S and Ag/Se clusters, such as reported extensively by Fenske et al., if the organic protection of such binary clusters is replaced conceptually by (RSn)/Se units. However, the latter seem to stabilize the cluster cores better than relatively weakly bound phosphane ligands, such that the ternary clusters do not grow to the giant extensions of their binary relatives, which have been reported to achieve sizes of between 4 to 490 Ag atoms …”