A novel hexanuclear silver(I) complex with photoluminescence properties

Atomistic Details of Nanocluster Formation from Machine-Learned-Potential-Based Simulations

Understanding the mechanism for the formation of metal nanoclusters is an open challenge in nanoscience. Computational modeling can provide molecular details of nanocluster formation that are otherwise inaccessible. However, simulating nanocluster nucleation in solution presents significant challenges, including inaccurate energy predictions and limitations on the system size and time scale. This work addresses these challenges by combining deep neural networks (DNNs) with well-tempered metadynamics (WT-MetaD) to model the nucleation of a prototypical nanocluster, Ag6(SCNH2)6 in methanol. A neural-network-potential-based unbiased molecular dynamics simulation captured the cluster's dynamic behavior, while WT-MetaD simulations revealed an almost barrierless transition from dispersed precursors to a nucleated state. The method's robustness was further demonstrated by scaling up to 30 randomly distributed precursors, which resulted in spontaneous nucleation. This study presents the first successful DNN model of nanocluster formation in solution with density-functional-theory-level accuracy, paving the way for advancements in the field.

Crystal structure of poly[(μ2-4-amino-1,5-naphthalenedisulfonato-κ4O,N:O′, N′)bis(μ2-hexamethylenetetramino-κ2N;N′)silver(I)], {C22H30Ag2N9O6S2}n

C22H30Ag2N9O6S2, monoclinic, P21/c (no. 14), a = 10.4629(10) Å, b = 10.9785(8) Å, c = 12.3483(15) Å, β = 109.766(12)°, V = 1334.8(2) Å3, Z = 2, Rgt(F) = 0.0662, wRref(F2) = 0.1356, T = 293(2) K.

Synthesis, crystal structure, fluorescence and antioxidant properties of a binuclear Ag(I) complex based on the SPPh3 ligand

The binuclear silver(I) complex [Ag2(η2-SPPh3)2(SPPh3)2](BF4)2 has been synthesized. Crystal analysis shows the coordination sphere around Ag(I) can be described as a three-coordinated slightly distorted planar triangular configuration with both monodentate and monoatomic bidentate bridging coordination modes for the SPPh3 ligand. The fluorescence properties of free SPPh3 and the Ag(I) complex have been studied in the solid state. The Ag(I) complex shows quasi-reversible Ag+/Ag pairs in its electrochemistry and has significant antioxidant activity against hydroxyl radicals.

A 2D layer network assembled from an open dendritic silver cluster Cl@Ag11N24 and an N-donor ligand

A 2D layer network was synthesized from an N-donor ligand and a new silver cluster featuring an open dendritic structure with a high coordination ratio of N atom. Both the assembly process and luminescence properties of this complex was studied.