The inorganic-organic interface between metal catalysts and their substrates greatly influences reaction processes, but few studies of this have been conducted for a detailed understanding its structure. Herein, we describe the synthesis structural determination an arylthiolated Au25(F-Ph)18- nanocluster characterize in detail key roles ligands photocatalyzed oxidative functionalization reactions. most significant findings are that (i) interactions established to avoid distortion geometric...

The surface of a polysulfone membrane was modified with bioinspired polydopamine (PDA) film followed by the in situ formation silver nanoparticles (AgNPs) to mitigate biofouling. PDA modification enhanced membrane's bacterial anti-adhesive properties increasing hydrophilicity, while AgNPs imparted strong antimicrobial membrane. could be generated on simply exposing AgNO3 solutions. Ag+ ions were reduced catechol groups PDA; AgNP mass loading increased exposure time, and firmly immobilized...

Building framework materials with desirable properties and enhanced functionalities nanocluster/superatom complexes as building blocks remains a challenge in the field of nanomaterials. In this study, chiral [Au1 Ag22 (S-Adm)12 ]3+ complex (SC, which S-Adm=1-adamantanethiol) was employed block to construct three-dimensional (3D) superatom inorganic (SCIF) SCIF-1 SCIF-2 through SbF6- linkers. is racemic due assembly two SC enantiomers single crystal. SCIF-2, are packed separate crystals, thus...

Hydride AuI bonds are labile due to the mismatch in electric potential of an oxidizing metal and reducing ligand, therefore structure structure-activity relationships nanoclusters that contain them seldom studied. Herein, we report synthesis characterization [Au7 (PPh3 )7 H5 ](SbF6 )2 (abbrev. Au7 H52+ ), Au cluster complex containing five hydride ligands, which decomposed give [Au8 ]2+ Au82+ ) upon exposure light (300 450 nm). The valence state H- was verified by density functional theory...

Abstract We present a feasible way to strongly enhance Raman signals via introducing an ultra-thin dielectric film in the dual-layer plasmonic hotspots structure, which forms quasi-three-dimensional structure. The intensity was obtained with enhancement factor of 735% for metal structure buffered silicon film. Moreover, layer based surface-enhanced scattering (SERS) substrate provided signal two five times larger than that silica substrate. These distinct responses confirm high-index...

Significance Biofouling is a significant problem for membrane-based systems because it reduces flow and increases energy consumption. This work shows previously unreported approach to prevent membrane biofouling by using beneficial biofilm. The strain was engineered have dispersal “feedback circuit,” based on secretion uptake of communication signal, limiting its own biofilm formation self-monitoring selective dispersal. also produce nitric oxide, which prevents harmful bacteria; the two...

Abstract Bimetallic core–shell nanostructures hold great promise in elucidating the bimetallic synergism. However, it remains a challenge to construct atomically precise with high‐valence active metals on gold surface. In this work, we report total structure of [Au 42 Cd 40 (SR) 52 ] 2− nanocluster and multiple implications. Single crystal X‐ray diffraction (SCXRD) reveals that possesses two‐shelled Au 6 @Au 36 core closed cadmium shell , is then protected by thiolate (‐SR) ligands. The...

Atomically precise nanoclusters (NCs) provide opportunities for correlating the structure and electrocatalytic properties at atomic level. Herein, we report single-atom doping effect ligand on CO2 electroreduction (eCO2RR) by comparing monogold-doped Au1Cu24 homocopper Cu25 NCs protected triphenylphosphine or/and tris(4-fluorophenyl)phosphine. Catalytic results revealed that electronic distribution of is enormously contracted Au atoms, entitling it to exhibit unique inhibition hydrogen...

Understanding the growth of nanoclusters and relationship between structure-activity depends on precise arrangement metals their surface. In this work, we realized synchronous rearrangement metal atoms equatorial plane Au-Cu alloy nanoclusters. Upon adsorption phosphine ligand, Cu Au52Cu72(SPh)55 nanocluster are irreversibly rearranged. The whole process can be understood from a mechanism initiated by ligand. Furthermore, effectively improve efficiency A3 coupling reactions without...

Abstract Uranium is one of the important elements in nuclear industry, and efficient recovery uranium resources has become an urgent problem to be solved. Adsorption a widely used technology, offering advantages such as high efficiency, low cost simple operation. In this paper, novel CdO/NiFe2O4 magnetic composite synthesized characterized by SEM, XRD XPS, results showed that rate maximum adsorption capacity U(Ⅵ) reaches 96.91 % 167.60 mg·g-1, respectively. The kinetics conformed...

We numerically proposed and demonstrated a semiconductor meta-surface light absorber, which consists of silicon patches array on thin-film an opaque silver substrate. The Mie resonances the fundamental cavity mode ultra-thin film couple strongly to incident optical field, leading multi-band perfect absorption. maximal absorption is above 99.5% polarization-independent. Moreover, behavior scalable in frequency region via tuning structural parameters. These features hold absorber platform with...

A photo-induced transformation from [Au23(S-c-C6)16]−(TOA)+ to Au28(S-c-C6)20 nanocluster was first reported in this work. The is excited [Au23(S-c-C6)16]•–(TOA)+ by photons with energy higher than its Eg (Eg = HOMO – LUMO gap), and then, the negatively charged [Au23(S-c-C6)16]•– oxidized neutral state transfering one electron O2. unstable cluster [Au23(S-c-C6)16]0 obtained decomposed into smaller finally reassembled nanocluster. Time-dependent UV–vis, matrix-assisted laser...

A facile and general strategy for efficient direct conversion of oximes to amides using an inexpensive organic photocatalyst visible light is described. This radical Beckmann rearrangement can be performed under mild conditions. Various alkyl aryl ketoximes diaryl effectively converted into the corresponding in excellent yields.

In this work, Ag nanoparticles (AgNPs) were synthesized quickly by a one-step method utilizing polydopamine-glutathione (PDA-GNPs) as reducing agent. The PDA-GNPs and the generated AgNPs acted energy donor acceptor, respectively. Accordingly, fluorescence of was quenched on basis resonance transfer (FRET). presence melamine, preferential combination Ag(I) melamine to form Ag(I)–melamine complex prevents from forming AgNPs, together with enhancement compared absence melamine. Under optimal...

Transformation of secondary amides to N-acylimines was used as an effective strategy activate otherwise unreactive amide bonds. In this tandem reaction, the Rose Bengal-catalyzed photo-oxidative coupling arylglycine esters and enamides generates N-acylimines, which undergo intramolecular transamidation imine hydrolysis afford bioactive acyl Mannich base derivatives under metal-free mild conditions.

Surface-enhanced Raman scattering (SERS) technique has presented great potential in medical diagnosis, environment monitoring, and food detection due to its high sensitivity, rapid response, fingerprint effect. Many efforts have been concentrated on all kinds of strategies produce efficient SERS platforms. Here, we report a simple controllable method large-area platforms with spatially stacked plasmonic hotspots. The consist double-layer metal porous films are easily fabricated by magnetron...