Insights into the effect of regulation of molecular composition on the properties of (AuAg)₉clusters

Abstract

The precise tuning of cluster composition helps understand the relationship between cluster and properties. In this context, on the basis of [Au4Ag5(SAdm)6(Dppm)2](BPh4) (HSAdm is 1-adamantanethiol, C10H15SH; Dppm is bis(diphenylphosphino)methane, Ph2PCH2PPh2),...

Elucidation of the electronic structures of thiolate-protected gold nanoclusters by electrochemical measurements

“…These electrochemical methods have also been applied to Au NCs protected by phosphine 121–128 and stibine, 129 and to NCs based on Ag, 130–133 Cu, 134 and group 10 elements. 135–139 In the future, these electrochemical techniques are expected to reveal the electronic states of metal NCs protected by other ligands and composed of other metals.…”

Cumulative Impact of Ligands on the Optical Properties of Ag21 Nanoclusters: Insights into the Relaxation Dynamics

“…Proton chemical shifts are reported in parts per million (δ) with the solvent CDCl 3 (δ 7.26 ppm). 31 P NMR spectra were recorded on Bruker AVANCE REO-600 MHz spectrometers in deuterated solvents. Room-temperature absorption spectra were recorded with a Shimadzu UV−vis spectrophotometer using a cuvette with a path length of 1 cm.…”

“…Metal nanoclusters with atomic precision have attracted significant interest owing to their structural diversity and fascinating optical properties to find out various potential applications. − Synthesis of atomically precise NCs, understanding of their electronic structure, and electron–phonon coupling are essential to designing metal clusters with their tailored optical properties. − A few strategies have been used to synthesize highly luminescent metal clusters by tailoring several atoms and surface staple motifs. − Some of the efficient methods, such as one-pot reduction, ligand exchange, inter-NC reaction, thermodynamic and kinetic control over the desired product, etc., have been employed to fabricate stable thiolated Ag NCs. − The noncovalent interactions of ligands are crucial for the stability of the NCs. − It is reported that primary ligands (thiolates) protect the metal core only, and the thiolate and phosphine can stabilize the NCs. − Zheng et al have reported that the secondary PPh 3 ligand can shrink the Ag NC size and influence their luminescence property . Bakr et al have reported that the coligands of phosphines allow the NCs for high-quality crystal growth .…”

“…Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jpcc.4c02336. NC characterization (TGA, TEM, FTIR, 1 H and31 P NMR and XPS), Tauc plot, temperature-dependent absorption spectra, UV−vis absorption and PL spectra of the control experiment of Ag NCs, absolute PLQY, PL spectra at different excitations, UV−vis spectra after the TA measurement, and population profile of Ag NCs (PDF)…”