Carborane-Cluster-Wrapped Copper Cluster with Cyclodextrin-like Cavities for Chiral Recognition.

Chiral atomically precise metal clusters, known for their remarkable chiroptical properties, hold great potential for applications in chirality recognition. However, advancements in this field have been constrained by the limited exploration of host-guest chemistry, involving metal clusters. This study reports the synthesis of a chiral Cu(CBHS) (denoted as Cu@CB, where CBHSH = 9,12-(HS)-1,2--carborane) cluster by an achiral carboranylthiolate ligand.

Construction of novel Ag(0)-containing silver nanoclusters by regulating auxiliary phosphine ligands.

Controlled synthesis of metal clusters through minor changes in surface ligands holds significant interest because the corresponding entities serve as ideal models for investigating the ligand environment's stereochemical and electronic contributions that impact the corresponding structures and properties of metal clusters. In this work, we obtained two Ag(0)-containing nanoclusters (Ag17 and Ag32) with near-infrared emissions by regulating phosphine auxiliary ligands. Ag17 and Ag32 bear similar shells wherein Ag17 features a trigonal bipyramid Ag kernel while Ag32 has a bi-icosahedral interpenetrating an Ag kernel.

Boosting 2000-Fold Hypergolic Ignition Rate of Carborane by Substitutes Migration in Metal Clusters.

Hypergolic propellants rely on fuel and oxidizer that spontaneously ignite upon contact, which fulfill a wide variety of mission roles in launch vehicles and spacecraft. Energy-rich carboranes are promising hypergolic fuels, but triggering their energy release is quite difficult because of their ultrastable aromatic cage structure. To steer the development of carborane-based high-performance hypergolic material, carboranylthiolated compounds integrated with atomically precise copper clusters are presented, yielding two distinct isomers, Cu and Cu, both possessing similar ligands and core structures.

Modular Cocrystallization of Customized Carboranylthiolate-Protected Copper Nanoclusters via Host-Guest Interactions.

Cocrystals containing distinct atom-precise metal nanoclusters (NCs) provide an opportunity to elucidate the crystallization process, architectural complexity, and newly emerging properties of condensed-state metal NC-assembled materials. However, the controllable preparation of such cocrystals is still challenging. Herein, we present a modular strategy to cocrystallize two customized carboranylthiolate-protected copper NCs, Cu(CBHS)(CHCN) (Cu) and Cu(CBHS) (Cu), which adopt matched surface patterns by host-guest chemistry.

Site-specific sulfur-for-metal replacement in a silver nanocluster.

A new Ag nanocluster with a closed electronic structure and eight valence electrons is reported, which has a similar structure to that of an open-shell Ag nanocluster with three valence electrons, except that in the shell two (Ag-PPh) cations replace two S anions specifically. The fine structural modulation leads to various levels of activity for singlet oxygen photogeneration due to the distinct optical gaps of the nanoclusters.

Composition-Dependent Enzyme Mimicking Activity and Radiosensitizing Effect of Bimetallic Clusters to Modulate Tumor Hypoxia for Enhanced Cancer Therapy.

Alloying is an efficient chemistry to tailor the properties of metal clusters. As a class of promising radiosensitizers, most previously reported metal clusters exhibit unitary function and cannot overcome radioresistance of hypoxic tumors. Here, atomically precise alloy clusters Pt M (M = Au, Ag, Cu) are synthesized with bright luminescence and adequate biocompatibility, and their composition-dependent enzyme mimicking activity and radiosensitizing effect is explored.

Intervention Effect of Long-Term Aerobic Training on Anxiety, Depression, and Sleep Quality of Middle School Students With Depression After COVID-19.

To explore the effects of using RPE exercise intensity monitoring methods and 12-week mid- and low-intensity team aerobic training on anxiety, depression and sleep quality of depressed middle school students after the COVID-19 epidemic. All study participants were all from a boarding middle school in Chongqing, China. All study participants were screened by the self-rating depression scale and reached the diagnostic criteria for depression.

Alkynyl-Stabilized Superatomic Silver Clusters Showing Circularly Polarized Luminescence.

We report a new enantiomeric pair of superatomic silver clusters, , prepared from chiral alkynyl ligands. and possess symmetry and emit near-infrared (NIR) light with a quantum yield (QY) of 8.0% under ambient condition as well as NIR circularly polarized luminescence (CPL) as a result of the chirality of the excited states.

Spontaneous Resolution of Chiral Multi-Thiolate-Protected Ag Nanoclusters.

Despite significant progress achieved in the preparation of chiral nanoparticles, the enantioseparation of racemates still presents a big challenge in nanomaterial research. Herein, we report the synthesis and structural characterization of racemic anisotropic nanocluster Ag(CBHS)Dppm ( -), which is protected by mixed carboranetrithiolate and phosphine ligands. Spontaneous self-resolution of the racemates was realized through conglomerate crystallization in dimethylacetamide (DMAc).

Solar concentrator constructed with a circular prism array.

We present a novel idea to construct a solar concentrator with a circular prism array. FRED ray tracing software is used to evaluate our proposed structure in which the incident light rays are deflected by total internal reflection and the optical energy is concentrated and collected at the center. The light rays to be collected travel within the disk once they enter the module, saving the space that is reserved for ray propagation in other concentrators.