Supramolecular Intercluster Compounds Consisting of Gold Clusters and Keggin Anions

Abstract

3-were synthesized as single-crystals by a diffusion method. Depending on the solvent combination, two modifications with different core geometries of the gold cluster and different overall packing type can be

Phosphine-Coordinated Pure-Gold Clusters: Diverse Geometrical Structures and Unique Optical Properties/Responses

“…The borohydride reduction of monophosphine gold(I) complex (Au(PR 3 )X) in ethanol is the original recipe and has been most widely used as a conventional method, which generally yields Au 9 [27,37,38,61,62] or Au 11 species [19,[44][45][46][47][48][63][64][65]. NaBH 4 is commonly exploited as the reducing agent, because of the ease in handling.…”

Isolation, Optical Properties and Core Structure of a Water-soluble, Phosphine-stabilized [Au9]3+ Cluster

“…For instance, well-formed crystals of [Au 9 (PPh 3 ) 8 ](NO 3 ) 3 can be obtained reliably by reducing [Au(PPh 3 )NO 3 ] with NaBH 4 in ethanol, followed by purification and crystallization from diluted solutions [9]. The cluster cation [Au 9 (PPh 3 ) 8 ] 3+ can be crystallized in two conformations of the gold polyhedron, the so-called crown structure and the butterfly structure [10,11]. It was found that [Au 9 (PPh 3 ) 8 ](NO 3 ) 3 in its butterfly conformation shows luminescence in the near infrared (NIR) in the solid state, which is advantageous for biomedical imaging [9].…”

Ionically Cross‐Linked Gold Clusters and Gold Nanoparticles

“…These novel ionic crystals, arising from investigations by Jansen and Schulz-Dobrick, have brought about a renaissance in the chemistry of these long-known gold clusters. [16] Depending on the crystallization conditions, either orange-red needles or black-green platelets and prisms are formed, which differ structurally in the Au 9 skeleton and in the crystal packing. Figure 1 shows the crystal structure of the orange-red form, which can be derived from the CsCl structure.…”