Probing the synergistic effects of amino compounds in mitigating oxidation in 2D TiCT MXene nanosheets in aqueous environments.

The shelf life of 2D MXenes in functional devices and colloidal dispersions is compromised due to oxidation in the aqueous system. Herein, a systematic investigation was carried out to explore the potential of various amino compounds as antioxidants for TiCT MXenes. A range of basic, acidic, and neutral amino acids were examined for their effectiveness, where certain antioxidants failed to protect MXenes from oxidation, while others accelerated their decomposition.

HPClas: A data-driven approach for identifying halophilic proteins based on catBoost.

Halophilic proteins possess unique structural properties and show high stability under extreme conditions. This distinct characteristic makes them invaluable for application in various aspects such as bioenergy, pharmaceuticals, environmental clean-up, and energy production. Generally, halophilic proteins are discovered and characterized through labor-intensive and time-consuming wet lab experiments.

Reconstructing the phase of vanadium oxides enables redox-catalysis manipulated reversible sulfur conversion for stable Zn-S batteries.

The naturally sluggish redox kinetics and limited utilization associated with the sulfur conversion in Zn/S electrochemistry hinder its real application. Herein, we report an phase reconstruction strategy that activates the catalytic activity of vanadium oxides for invoking redox-catalysis to manipulate reversible sulfur conversion. It was identified that the VO@C/S precursor derived from metal organic frameworks could be transformed into VO ·HO@C/S by a facile electrochemical induction process.

Enhanced Cr(vi) removal by Co and PPy co-modified Ca-Al-layered double hydroxides due to adsorption and reduction mechanisms.

Co and polypyrrole co-modified hierarchical CaAl-LDH microspheres (CCALP) were synthesized hydrothermal and polymerization methods. The synergistic effect of PPy and Co endowed CCALP with higher surface area and more reduction sites than CaAl-LDHs modified by Co or PPy alone, maintaining good recyclability for Cr(vi) removal efficiency over four cycles without any treatment. Compared to Co, PPy doping was the dominant reason for Cr(vi) reduction on CCALP.

Modulatory spin-flip of triplet excitons diversiform electron-donating units for MR-TADF emitters towards solution-processed narrowband OLEDs.

Multiple resonance thermally activated delayed fluorescence (MR-TADF) molecules are emerging as promising candidates for high-resolution organic light-emitting diode (OLED) displays, but MR-TADF emitters always suffer from an unsatisfactory rate constant of reverse intersystem crossing ( ) due to inherently low spin orbital coupling strength between excited singlet and triplet states. Herein, we systematically investigate the long-range charge transfer (LRCT) and heavy-atom effects on modulating the excited state natures and energy levels integrating diversiform electron-donating units with the MR skeleton. Compared with unsubstituted analogues, newly designed MR-TADF emitters exhibit significantly boosted values and close-to-unity photoluminescence quantum yield especially for BuCzBN-PXZ (2.

Spotting d-band centers of single-atom catalysts by oxygen intermediate-boosted electrochemiluminescence.

Catalytic activities of single-atom catalysts are strongly dependent on their d-band centers. However, it is a long-standing challenge to provide a cost-effective and accurate evaluation for the positions of d-band centers of these catalysts due to the fact that the widely applicable photoelectron spectroscopy methodologies require complicated sampling and spectral unfolding processes. In this contribution, we have proposed oxygen intermediate-boosted electrochemiluminescence (ECL) for rapid spotting of the d-band centers of single-atom catalysts, involving single atomic Au, Ag, Cu and Fe.

Visualization of drug release in a chemo-immunotherapy nanoplatform ratiometric F magnetic resonance imaging.

Visualization of drug release is crucial for improving therapeutic efficacy and preventing inappropriate medication dosing, yet, challenging. Herein, we report a pH-activated chemo-immunotherapy nanoplatform with visualization of drug release by ratiometric F magnetic resonance imaging (F MRI). This nanoplatform consists of ultra-small histamine-modified perfluoro-15-crown-5-ether (PFCE) nanodroplets loaded with doxorubicin (Dox), which are packaged in trifluoromethyl-containing metal-organic assemblies coordination-driven self-assembly.

DC-derived whole cell cytokine nano-regulator for remodelling extracellular matrix and synergizing tumor immunotherapy.

A smart dendritic cell (DC)-derived whole cell cytokine (DWC) nano-regulator of TCPs was developed for tumor cytokine-immunotherapy. The DWCs were purified from activated DC-cultured media and applied as a nano-dosage form. It was found that TCPs could remodel extracellular matrices the elimination of fibronectin and type I collagen (Col-I) in tumor tissues, as well as the inhibition of α-SMA expression in cancer associated fibroblasts (CAFs).

π-extended pyrenes: from an antiaromatic buckybowl to doubly curved nanocarbons with gulf architectures.

The synthesis of π-extended pyrenes keeps attracting considerable attention. In particular, frameworks containing nonbenzenoid rings might display intriguing properties. Here, we report a practical synthetic pathway to access a new buckybowl (1), which is composed of four five-membered rings externally fused to a pyrene core.

Boosting type-I ROS production of molecular photosensitizers using bridge-assisted superexchange coupling.

Bridge-assisted superexchange coupling capable of long-range electron transfer proves to be effective for charge separation. However, the exploitation of this photochemical process in engineering reactive oxygen species (ROS) production remains unexplored. Herein, piperazine serves as a bridging unit to facilitate a cascade electron transfer from the electron donor site (CO) to the acceptor site (CN) within the COCN molecule, ultimately boosting the generation of superoxide radicals (O ˙) and hydroxyl radicals (˙OH).

Combustion-explosion suppression and environmental protection of typical sulfur-containing hazardous chemicals.

Sulfur, as a crucial chemical raw, poses increased combustion-explosion risks when mixed with other hazardous substances due to its dual nature as both an oxidant and a reducing agent. Additionally, sulfur-induced combustion and explosions can result in environmental pollution. Combustion-explosion suppression technology plays a crucial role in industrial production by effectively preventing hazardous chemical explosion incidents.

A record-high EQE of 7.65%@3300 cd m achieved in non-doped near-ultraviolet OLEDs based on novel D'-D-A type bipolar fluorophores upon molecular configuration engineering.

Developing a high-performance near-ultraviolet (NUV) material and its simple non-doped device with a small efficiency roll-off and good color purity is a promising but challenging task. Here, we proposed a novel donor'-donor-acceptor (D'-D-A) type molecular strategy to largely solve the intrinsic contradictions among wide-bandgap NUV emission, fluorescence efficiency, carrier injection and transport. An efficient NUV fluorophore, 3,6-mPPICNC3, exhibiting a hybridized local and charge-transfer state, is achieved through precise molecular configuration engineering, realizing similar hole and electron mobilities at both low and high electric fields.

Introduction to nanoclusters: from theory to application.

Yi Gao, Daojian Cheng and Zhigang Wang introduce the themed collection on Nanoclusters: from theory to application.

Cold atmospheric plasma can effectively disinfect SARS-CoV-2 in the wastewater.

COVID-19 is currently pandemic and the detection of SARS-CoV-2 variants in wastewater is causing widespread concern. Herein, cold atmospheric plasma (CAP) is proposed as a novel wastewater disinfection technology that effectively inactivates SARS-CoV-2 transcription- and replication-competent virus-like particles, coronavirus GX_P2V, pseudotyped SARS-CoV-2 variants, and porcine epidemic diarrhoea virus in a large volume of water within 180 s (inhibition rate > 99%). Further, CAP disinfection did not adversely affect the viability of various human cell lines.

Revealing the synergistic effect of Ni single atoms and adjacent 3d metal doped Ni nanoparticles in electrocatalytic CO reduction.

Herein, we report the successful fabrication of a series of transition metal doped Ni nanoparticles (NPs) coordinated with Ni single atoms in nitrogen-doped carbon nanotubes (denoted as NiM-NCNTs, M = Mn, Fe, Co, Cu and Zn; Ni = Ni single atom). X-ray absorption fine structure reveals the coexistence of Ni single atoms with Ni-N coordination and NiM NPs. When applied for electrocatalytic CORR, the NiM-NCNT compounds show the Faradaic efficiency of CO (FE) with a volcano-like tendency of Mn < Fe ≈ Co < Zn < Cu, in which the NiCu-NCNT exhibits the highest FE of 96.

WO/MIL-125 (Ti) composite material for enhancing the reduction of Cr(vi) under visible light.

In wastewater containing heavy metals, Cr(vi) is a potentially toxic metal, mainly derived from production and processing processes such as textile printing, dyeing, ore mining, battery applications, metal cleaning and electroplating. WO is widely used in photocatalytic degradation and reduction, and its utilization rate of visible light is high. However, the rapid recombination of photogenerated electron-hole pairs of WO limits its use.

Molecular imaging of tumour-associated pathological biomarkers with smart nanoprobe: From "Seeing" to "Measuring".

Although the extraordinary progress has been made in molecular biology, the prevention of cancer remains arduous. Most solid tumours exhibit both spatial and temporal heterogeneity, which is difficult to be mimicked in vitro. Additionally, the complex biochemical and immune features of tumour microenvironment significantly affect the tumour development.

Tumor microenvironment-responsive delivery nanosystems reverse immunosuppression for enhanced CO gas/immunotherapy.

Carbon monoxide (CO) gas therapy demonstrates great potential to induce cancer cell apoptosis and antitumor immune responses, which exhibits tremendous potential in cancer treatment. However, the therapeutic efficacy of CO therapy is inhibited by the immunosuppressive tumor microenvironment (TME). Herein, a facile strategy is proposed to construct hollow-structured rough nanoplatforms to boost antitumor immunity and simultaneously reverse immunosuppression by exploring intrinsic immunomodulatory properties and morphological optimization of nanomaterials.

Expression of concern: Synthesis of a FeO@P4VP@metal-organic framework core-shell structure and studies of its aerobic oxidation reactivity.

Expression of concern for 'Synthesis of a FeO@P4VP@metal-organic framework core-shell structure and studies of its aerobic oxidation reactivity' by Zongcheng Miao , , 2017, , 2773-2779, https://doi.org/10.1039/C6RA25820D.

Quantitative detection of microRNA-21 using assembled photoacoustic and SERS nanoprobes.

Accurately quantifying microRNA levels is of great importance for cancer staging and prognosis. However, the low abundance of microRNAs and interference from the complex tumor microenvironment usually limit the real-time quantification of microRNAs . Herein, for the first time, we develop an ultrasensitive microRNA (miR)-21 activated ratiometric nanoprobe for quantification of the miR-21 concentration without signal amplification as well as dynamic tracking of its distribution.

The determinants associated with zoonotic potential of influenza A viruses: BTN3A3 evasion mediated by residue mutation in the nucleoprotein.

Mutation of residue 313 in the viral nucleoprotein from F/L to Y/V (or substitutions to N, H, or Q in the nucleoprotein residue 52 adjacent to residue 313) facilitates IAVs to escape from BTN3A3 restriction on virus replication.