Ag₄₄(SeR)₃₀: A Hollow Cage Silver Cluster with Selenolate Protection

Abstract

Selenolate protected, stable and atomically precise, hollow silver cluster was synthesized using solid state as well as solution state routes. The optical absorption spectrum shows multiple and sharp features similar to the thiolated Ag44 cluster, Ag44(SR)30 whose experimental structure was reported recently. High-resolution electrospray ionization mass spectrometry (HRESI MS) shows well-defined molecular ion features with two, three, and four ions with isotopic resolution, due to Ag44(SePh)30. Additional characterization with diverse tools confirmed the composition. The closed-shell 18 electron superatom electronic structure, analogous to Ag44(SR)30 stabilizes the dodecahedral cage with a large HOMO-LUMO gap of 0.71 eV. The time-dependent density functional theory (TDDFT) prediction of the optical absorption spectrum, assuming the Ag44(SR)30 structure, matches the experimental data, confirming the structure.

Silver–copper nanoalloys-an efficient sensitizer for metal-cluster-sensitized solar cells delivering stable current and high open circuit voltage

“…Coalescence and oxidation of metal NPs are the associated issues. In this regards, some sort of ligands or protecting agents have been recommended such as thiolates [6e8], dendrimers [9] and selenolates [10]. These ligands stabilize and protect the NPs especially oxidizing metals (e.g Cu).…”

Behaviour of ‘free-standing’ hollow Au nanocages at finite temperatures: a BOMD study

“…In order to stable the cage at working temperatures, there have been attempts to dope or functionalise gold cages so as to increase the energy gap between occupied and unoccupied molecular orbitals. This is done by endohedral doping [46][47][48][49][50] or by functionalising them on the surface [51]. Although, this increases the possibility of a higher thermal stability at working temperatures, it does not always ensure it.…”

Promotion of reversible Li+ storage in transition metal dichalcogenides by Ag nanoclusters

“…The Ag NCs used in our design are small (o2 nm) Ag nanoparticles that have been reported to display molecular-like properties and some promising features for a wide range of applications. [22][23][24][25][26][27] Ag NCs were chosen for a number of reasons, including (1) the strong binding between Ag and S, (2) the large surface area of NCs compared with nanoparticles, which could reduce the usage of Ag, and (3) the fact that the small size of Ag NCs may allow them to be inserted into the gallery space between the MoS 2 layer and the graphene layer. The measured high-capacity and highrate performance of the MoS 2 /G/Ag composite aptly demonstrated the effectiveness of the NC modification in enhancing the performance of transition-metal dichalcogenide-based LIB anode materials.…”