We describe a new UV-Vis absorption setup designed to measure with improved sensitivity the absorption spectra of size-selected small metal clusters embedded in rare gas matrices. We aim at studying the electronic structure of clusters of different materials and their interaction with the matrix. The design, construction, and performance of the setup are discussed and demonstrated on the absorp...

Optical properties of silver Ag(n) nanoclusters are demonstrated to be dependent on their size, structure and charge state. It is found that when being contained in the sodalite cavity of LTA zeolite the tetradecanuclear hexacation silver cluster Ag14(6+) is stable. Its lower-lying states and optical spectrum are theoretically determined using the quantum chemical TD-DFT method. Its ground stat...

Reactions of silver(I) salts with 4-amino-4H-1,2,4-triazole (4-NH2-tz) in a 1 : 1 molar ratio yield four new silver adducts, namely [Ag(4-NH2-tz)](CF3SO3) (1), [Ag(4-NH2-tz)1.75](ClO4) (2), [Ag(4NH2-tz)1.75](BF4) (3) and [Ag(4-NH2-tz)1.75](NO3) (4). X-Ray analysis shows that 1 exhibits a 3D cationic [Ag(4-NH2-tz)] metal-organic framework of srs topology; 2, 3 and 4 are isostructural and display...

The structures and properties of 13-atom silver and copper bimetallic clusters are systematically investigated by density functional theory (DFT) in the theoretical frame of the generalised gradient approximation (GGA) exchange-collection function. Optical absorption, Raman spectra, vibrational spectra, as well as electronic and magnetic properties are calculated by DFT/GGA and semi-core pseudo...

We show the first example of a bisthiosemicarbazone silver double-tetranuclear cluster helicate [Ag 4 L 2 ] obtained by electrochemical synthesis which undergoes rare desulfurization process giving rise to cationic dihelicate (H L) ]SO .

The group 11 hydride clusters [Ag6H4(dppm)4(OAc)2] (1) and [Cu3H(dppm)3(OAc)2] (2) (dppm = 1,1-bis(diphenylphosphino)methane) were synthesized in moderate yields from the reaction of M(OAc) (M = Ag, Cu) with Ph2SiH2, in the presence of dppm. Complex 1 is the first structurally characterized homometallic polyhydrido silver cluster to be isolated. Both 1 and 2 catalyze the hydrosilylation of (α,β...

DNA-protected silver clusters (AgN-DNA) possess unique fluorescence properties that depend on the specific DNA template that stabilizes the cluster. They exhibit peak emission wavelengths that range across the visible and near-IR spectrum. This wide color palette, combined with low toxicity, high fluorescence quantum yields of some clusters, low synthesis costs, small cluster sizes and compatib...

Electronic and optical properties of silver clusters were calculated using two different ab initio approaches: 1) based on all-electron full-potential linearized-augmented plane-wave method and 2) local basis function pseudopotential approach. Agreement is found between the two methods for small and intermediate sized clusters for which the former method is limited due to its all-electron formu...