Reversible Interconversion between Ag and Ag Clusters and Their Responsive Optical Properties.

The exploration of structural interconversion in clusters triggered by external stimuli has attracted significant interest due to its potential to elucidate structure-property relationships of metal clusters. In this study, two types of silver clusters, Ag and Ag, are synthesized. Interestingly, the clusters exhibit reversible transformations in response to changes in the solvent conditions.

Octahedral vs Tiara-like Pd(SR) Clusters.

Atomically precise Pd-thiolate clusters are well-known for their well-defined structures and diverse applications involving catalysis, sensors, and biomedicine. While many of these clusters have been studied, their molecular structures typically feature a tiara-like arrangement. In this study, we present the first example of a non-tiara-like Pd-thiolate cluster: the octahedral Pd(SCH) (denoted as Pd-Oct).

A homologous series of macrocyclic Ni clusters: synthesis, structures, and catalytic properties.

Due to their intriguing ring structures and promising applications, nickel-thiolate clusters, such as [Ni(SR)] ( = 4-6), have attracted tremendous interest. However, investigation of the synthesis, structures, and properties of macrocyclic Ni clusters ( > 8) has been seriously impeded. In this work, a homologous series of macrocyclic nickel clusters, Ni(4MPT) ( = 9-12), was fabricated by using 4-methylphenthiophenol (4MPT) as the ligand.

Au Cd (SC H ) : A Glance at Structure-Property Relationship.

Doping Cd atom(s) into gold clusters is very promising in both theoretical study and practical applications. However, it has long been a challenge to synthesize heavily Cd-doped AuCd bimetallic clusters and thereby reveal their structure-property correlations. Herein a novel AuCd bimetallic cluster: Au Cd (SC H ) (SC H denotes deprotonated cyclohexanethiol) with a Cd to Au atomic ratio of 1:1 is reported.

Identifying the Real Chemistry of the Synthesis and Reversible Transformation of AuCd Bimetallic Clusters.

The capability of precisely constructing bimetallic clusters with atomic accuracy provides exciting opportunities for establishing their structure-property correlations. However, the chemistry (the charge state of precursors, the property of ligands, the amount of dopant, and so forth) dictating the fabrication of clusters with atomic-level control has been a long-standing challenge. Herein, based on the well-defined Au(SR) cluster (SR = thiolates), we have systematically investigated the factors of steric hindrance and electronic effect of ligands, the charge state of Au(SR), and the amount of dopant that may determine the structure of AuCd clusters.

The Factors Dictating Properties of Atomically Precise Metal Nanocluster Electrocatalysts.

Metal nanoparticles occupy an important position in electrocatalysis. Unfortunately, by using conventional synthetic methodology, it is a great challenge to realize the monodisperse composition/structure of metal nanoparticles at the atomic level, and to establish correlations between the catalytic properties and the structure of individual catalyst particles. For the study of well-defined nanocatalysts, great advances have been made for the successful synthesis of nanoparticles with atomic precision, notably ligand-passivated metal nanoclusters.

Species-dependent plasma metabolism of the ester compound daidzein 7,4'di-succinic acid mon-ester-O-ethoxy (DZ5).

Daidzein 7,4'di-succinic acid mon-ester-O-ethoxy (DZ5) is an ester-containing compound, which was recently synthesized. The objective of this study was to determine the hydrolysis rate of DZ5 in blood from the rat and the dog. The data showed that the hydrolysis rate of DZ5 in plasma was much more rapid in rats than in dogs following intravenous administration.

Validation of an HPLC method for the simultaneous determination of DZ5 and its active metabolite in dog plasma and its pharmacokinetics.

A validated HPLC method is described for the simultaneous determination of daidzein 7,4'-di-succinic acid mon-ester-O-ethoxy (DZ5) and its active metabolite daidzein 7,4'-dioxy-ethoxy (DZ4) in dog plasma. DZ5 and DZ4 were determined by reversed-phase HPLC (column: Hypersil C18 5 microm silica, 200 mm x 4.6 mm i.