Recent Progress in Atomically Precise Cu-M Alloy Nanoclusters.

Metal nanoclusters (NCs) with dimensions of approximately 3 nm serve as a crucial link between metal-organic complexes and metal nanoparticles, garnering significant interest due to their distinctive molecule-like characteristics. These include well-defined molecular structures, clear HOMO-LUMO transitions, quantized charge, and robust luminescence emission. Atomically precise alloy NCs, in contrast to homometallic NCs, exhibit a wealth of structures and intriguing properties, with their novel attributes often intricately tied to the positions of alloyed elements within the structure, facilitating the exploration of structure-property relationships.

Assembly of silver(I)-copper(I) bimetallic thiolate complexes assisted by phenylacetylene stabilizers.

Ag/Cu bimetallic clusters have been widely reported, but synthesis of such clusters simple self-assembly of heterometallic ions in air remains challenging due to the susceptibility of Cu ions to oxidation. In this study, protected by the phenylacetylene auxiliary ligand, we utilized [Cu(CHCN)]PF in conjunction with the (PrSAg) polymer to form Ag(I)-Cu(I) oligomer precursors, serving as the starting point for constructing a new [AgCu(PrS)(DPPM)](PF) cluster (DPPM = bis(diphenylphosphino)methane, Ag11-xCux, = 5-9). When the (PrSAg) precursor was replaced by (BuSAg), another cluster [AgCuS(BuS)(CHCN)](CHOH)(HO)(PF) (Ag21Cu4) was obtained.

Structural diversity of copper(I) alkynyl cluster-based coordination polymers utilizing bifunctional pyridine carboxylic acid ligands.

The utilization of bifunctional ligands, specifically pyridine carboxylic acids, endowed with dual coordination sites, has been instrumental in the assembly of polymer materials. The ambidentate characteristics of these ligands play a crucial role in shaping the structure and framework of cluster-based polymers. In this study, we have synthesized a diverse array of multidimensional copper(I) alkynyl cluster-based polymers (CACPs) by employing four distinct pyridine carboxylic acids - namely, isonicotinic acid (INA), 6-isoquinolinecarboxylic acid (IQL), 4-pyridin-4-yl-benzoic acid (4-PyBA), and 3-pyridin-4-yl-benzoic acid (3-PyBA) - as linking ligands.

Assembly of Copper Alkynyl Clusters into Dimensionally Diverse Coordinated Polymers Mediated by Pyridine Ligands.

Surface ligands play crucial roles in modifying the properties of metal nanoclusters and stabilizing atomically precise structures, and also serve as vital linkers for constructing cluster-based coordination polymers. In this study, we present the results of the solvothermal synthesis of eight novel copper alkynyl clusters incorporating pyridine ligands using a one-pot method. The resulting compounds underwent characterization through elemental analysis, Fourier transform infrared (FT-IR) spectroscopy, powder X-ray diffraction (PXRD), and single-crystal X-ray diffraction (SCXRD).

Chiral Canoe-Like Pd or Pt Alloyed Copper Alkynyl Nanoclusters Display Near-Infrared Luminescence.

Alloying nanoclusters (NCs) has emerged as a widely explored and versatile strategy for tailoring tunable properties, facilitating in-depth atomic-level investigations of structure-property correlations. In this study, we have successfully synthesized six atomically precise copper NCs alloyed with Group 10 metals (Pd or Pt). Notably, the Pd or Pt atom situated at the center of the distorted hexagonal antiprism Pd/Pt@Cu cage, coordinated with twelve Cu and two BuC≡C ligands.

Template-assisted synthesis of isomeric copper(i) clusters with tunable structures showing photophysical and electrochemical properties.

A comparative study of structure-property relationships in isomeric and isostructural atomically precise clusters is an ideal approach to unravel their fundamental properties. Herein, seven high-nuclearity copper(i) alkynyl clusters utilizing template-assisted strategies were synthesized. Spherical Cu and Cu clusters are formed with a [M@(V/PO)] (M: Cu, Na, K) skeleton motif, while peanut-shaped Cu clusters feature four separate PO templates.

Ag Cu (C=CAr) (DPPB) : A Rigid Ligand Co-Protected Bimetallic Silver(I)-Copper(I) Cluster with Room-Temperature Luminescence.

Metal clusters have become increasingly important in various applications, with ligands playing a crucial role in their construction. In this study, we synthesized a bimetallic cluster, Ag Cu (C=CAr) (DPPB) (Ag Cu ), using a rigid acetylene ligand, 3,5-bis(trifluoromethyl)phenylacetylide. Through single-crystal structure characterization, we discovered that the butterfly-shaped Ag Cu motifs were subject to distortion due to steric hindrance imposed by the rigid ligand.

Anion-templated silver thiolated clusters affected by carboxylate ligands.

Under the guidance of anion templates VO and SO, the novelty of cluster assembly can be increased by using different carboxylate ligands. Herein, the synthesis, crystal structure and electrochemical properties of three anion-templated silver thiolated clusters are reported, namely VO@Ag(PrS)(CFCO)(DMF) (1), VO@Ag(PrS)(CFCO)(PhCO)(DMF) (2), and [SO@Ag(PrS)(PTA)(HPTA)] (3, HPTA = phthalic acid). Single-crystal X-ray diffraction analysis showed that 1 and 2 are discrete clusters VO@Ag.

Copper(I) Alkynyl Clusters with Crystallization-Induced Emission Enhancement.

Four copper(I) alkynyl complexes incorporating phosphate ligands, namely, [Cu(BuC≡C)(PhOPO)] (; PhOPO = phenyl phosphate), [Cu(BuC≡C)(1-NaphOPO)] (; 1-NaphOPO = 1-naphthyl phosphate), [VO@Cu(BuC≡C)(1-NaphOPO)](PF)(F) (), and [PO@Cu(BuC≡C)(1-NaphOPO)](PF)(F) (), were solvothermally synthesized and well-characterized by IR spectroscopy, powder X-ray diffraction, and single-crystal X-ray diffraction. Single-crystal X-ray analysis revealed that the Cu cluster-based coordination chain polymers and are formed by assembly during crystallization, while and contain high-nuclearity copper(I) composite clusters enclosing orthovanadate and phosphate template ions, respectively, that are supported by ROPO ligands. Complexes - exhibit crystallization-induced emission enhancement.

Construction of Silver Clusters Capped by Zwitterionic Ethynide Ligands.

A zwitterionic ligand 3-(triethylammonio)propyne (TAP) has been employed to construct nine silver ethynide compounds for the first time. Single-crystal X-ray analyses reveal that compounds and are silver ethynide assemblies based on the Ag subunits and clusters - are small discrete clusters of Ag, Ag, Ag, and Ag, respectively, ligated by the bulky TAP ligand with different auxiliary ligands. In addition, upon acquiring the tripod-like BuPO, a unprecedented 80 nuclei silver ethynide cluster was isolated and determined to be [(CFCO)@Ag(TAP)(BuPO)(CFCO)] by crystallography and thermogravimetric analysis.

[MRI diagnosis of osteochondral lesions in the talus and the dynamic follow up analysis after osteochondral transplantation].

Objective: To investigate MRI findings of osteochondral lesions in the talus;to evaluate the value of MRI in diagnosing and determining the stage of osteochondral lesions;to analyze the follow up clinical value of MRI in osteochondral transplantation of autologous bone.

Methods: A total of 79 patients from February 2013 to March 2015 had been retrospectively analyzed. All the patients were treated in our hospital.

[Research advances of fat embolism syndrome in forensic medicine].

Fat embolism syndrome (FES) is a common and life-threatening clinical syndrome, which is a difficult problem frequently encountered in medical science, especially in forensic medicine and orthopaedics. FES would be easily mistaken or missed by forensic examiner due to the lack of the specific symptoms and signs. This article reviews the etiology, pathogenesis, pathology, the mechanism of death, as well as the advances of the forensic medicine diagnosis of FES with current literatures update.