Latest ArticlesThe addition of electrolyte additives is an effective strategy for tuning the property of the electrolyte to engineer the electrode/electrolyte interface, and there exist obvious discrepancies regarding the effect of fluoroethylene carbonate (FEC) as an electrolyte additive on the performance of cathodes. Herein FEC is introduced into the electrolyte of the LiMn0.8Fe0.2PO4/Li cell and its effect on the properties of the LiMn0.8Fe0.2PO4 is investigated. It is found that the addition of FEC in the electrolyte has a positive effect on the performance of the LiMn0.8Fe0.2PO4 cathode, which can be attributed to the reduced products generated by the interfacial side-reactions on the LiMn0.8Fe0.2PO4 cathode surface and the decreased metal dissolution in the FEC-containing electrolyte, thanks to the higher oxidation resistance of FEC and the easier and stronger binding of FEC and PF6−.
Integrating ring-fused modification with π-conjugated extension is an effective approach for designing, synthesizing, and application for novel borondipyrromethene (BODIPY) structures. In this work, based on phenyl[b]-fused BODIPY, we made reasonable modification of the methyl group at 1-site to generate dye NBDP. NBDP possessed near-infrared region (NIR) absorption and emission properties, and the intramolecular charge transfer (ICT) resulted in low fluorescence. Whereas, heat energy is evidently released in the presence of light, which can be exploited for intracellular photothermal therapy via the cell apoptosis process, reducing the inflammatory side-effects induced by necrosis. This research provides a crucial foundation for the novel molecule via BODIPY multi-directional alteration and its potential application in anti-tumor phototherapy.
The first phloroglucinol-triterpenoid hybrids, myrtphlotritins A–E (1–5), were rapidly recognized and isolated from two species of Myrtaceae by employing the building blocks-based molecular network (BBMN) strategy. Compounds 1–5 featured new carbon skeletons in which phloroglucinol derivatives were coupled with lupane- and dammarane-type triterpenoids through different linkage patterns. Their structures and absolute configurations were elucidated by comprehensive analysis of spectroscopic data and quantum chemical calculations. Biosynthetic pathways for compounds 1–5 were proposed on the basis of the coexisting precursors. Guided by the biogenetic pathways, the biomimetic synthesis of compound 1 was also achieved. Additionally, compounds 2, 3, and 5 exhibited potent antiviral activities against herpes simplex virus type-1 (HSV-1) infection, and compounds 2 and 5 displayed significant anti-inflammatory activities on RAW264.7 cells.
Electrocatalytic CO2 reduction at mild conditions is a promising strategy to transform greenhouse gases into fuels or value-added chemicals to solve the increasingly serious environmental and energy problems. The most crucial factor in determining the CO2 reduction performance is to develop efficient electrocatalysts with high selectivity and stability. Among the various electrocatalysts, indium-based catalysts have attracted extensive attention due to their non-toxicity, low cost, and high formic acid/formate selectivity. In this work, we comprehensively review the recent development and research progress of indium-based electrocatalysts for CO2RR. The reaction mechanism, reaction pathways, structure–activity relationship, and strategies to enhance the activity of CO2RR on indium-based catalysts have also been briefly presented and discussed. Finally, the existing challenges and future developments for indium-based high-performance catalysts for CO2RR are proposed.
Exploring the therapeutic effect of single atom catalysts beyond reactive oxygen species (ROS) modulation would boost the prosperity of nanomedicine in cancer treatment. Autophagy as a vital therapy target offers new options for the control of renal cell carcinoma (RCC) progression. Herein, Fe single atom-decorated graphene oxide (Fe1-GO) nanosheet is developed to be a feasible autophagy inducer in RCC treatment. With the well-dispersed O−Fe1−O active sites, Fe1-GO kills ACHN cells effectively but maintains acceptable cytotoxicity to the normal podocyte and HK2 ones. In-depth analyses ascribe the inhibition of ACHN cells to the upregulated autophagy instead of the commonly known catalytic ROS generation. The in vivo therapeutic effect of Fe1-GO nanomedicine is also validated by the RCC-bearing BALB/c mice model, realizing an 89% reduction of tumor weight and good biosafety. This work provides new insights into the design of autophagy regulators as well as potential therapeutic strategies for RCC treatment.
Lithium (Li) metal anodes (LMAs) have garnered significant attention as a potential solution for developing high-energy density batteries, given their theoretical specific capacity and redox potential. However, safety concerns and internal cycling stability issues originated from uncontrollable Li dendrite growth have impeded the practical application of LMAs. Probing the interface between Li metal and electrolyte is a crucial process that offers valuable insights into the characteristics and regularity of primary circular reactions. To illustrate the intrinsic characteristic of Li metal batteries (LMBs) in spatial and temporal, it is imperative to employ electron microscopes to characterize the structural components distribution of Li with atomic resolution. This paper summarizes the progress in the characterization and analysis of the interfaces in LMBs with electron microscopes based on the principles of electron-matter interactions. Finally, future trends and the potential of electron microscopes are also discussed to advance our understanding of LMBs.
Low-molecular-weight (LMW) compounds are ubiquitous in living organisms and play essential roles in biological processes. The direct analysis of LMW compounds in biological tissues by matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) could provide a more comprehensive understanding of their essential functions. Here, we evaluated 4-nitrocatechol (4-NC) as a novel positive-ion matrix for enhancing in situ detection and imaging of LMW compounds from the rat liver, brain, and germinating Chinese-yew seed by MALDI-MS. Our results showed that the 4-NC possessed remarkable features, including strong ultraviolet absorption, uniform matrix crystal, excellent chemical stability, and fewer matrix-related background peaks. The use of 4-NC led to the successful detection of 232, 218, and 193 LMW compounds from the three abovementioned tissue sections, respectively. Also, the use of 4-NC improved the imaging quality of LMW compounds in tissue sections through MALDI-MSI and has the potential as a matrix for MALDI tissue imaging of LMW compounds.
Closed pores formed in hard carbons play an essential role in sodium storage at plateau region. However, the effect of different structural features on the diffusion of sodium ions into closed pores remains unclear. Herein, a precursor reconstruction strategy is conducted to regulate carbon microstructures including interlayer spacing, defect concentration, and closed pore volume by changing the ratio of aromatic and polysaccharide components. Aromatic structure parts tend to develop disordered carbons with fewer defects, larger interlayer spacing, and smaller closed pore volume, while polysaccharide components prefer to form disordered carbons with more defects, smaller interlayer spacing, and larger closed pore volume. Through the correlation analysis of microstructure features and the sodium storage capacity below 0.1 V. It finds that the intercalation capacity is proportional to the ratio of pseudo-graphitic domains, whereas the pore filling capacity appeared at lower potential gradually decreases with the increasing defect concentration due to homo-ionic repulsion effect, without linear correlation with short-range microcrystalline and closed pore volume. The optimized sample with suitable interlayer spacing and defect concentration exhibits a high plateau capacity of 241.7 mAh/g. This work provides insights into the exploitation of closed pore sodium storage performance.
An amphiphilic derivative with a large Stokes shift by introducing flexible hydrophilic long chains into a rigid ethylene-pyrene compound have been successfully synthesized. The alkylated compound exhibited a notable change in charge distribution, facilitating cation-π interactions. Through the process of amphiphilic self-assembly, the formation of highly ordered aggregates enabled effective photo-dimerization under 449 nm LED irradiation. Notably, this photo-responsive technology not only exhibited advanced multi-color emission effects, including white light emission but also exhibited environmentally friendly behavior in the aqueous phase.
In some industrial wastewater, heavy metals combine with organic complexing agents to form heavy metal complexes (HMCs). These HMCs can be difficult to decompose and remove through conventional techniques due to their higher stability than free heavy metal ions. In recent years, persulfate based advanced oxidation processes (PS-based AOPs) have been recognized as a viable technique for HMCs degradation. Nevertheless, a comprehensive and in-depth understanding of the relevant HMCs decomplexation mechanisms in PS-based AOPs is still lacking. This review delineates the current progress of HMCs decomplexation in PS-based AOPs. We discuss the distinctions between the two widely used oxidant types in PS-based AOPs techniques. Moreover, we summarize and highlight the decomplexation mechanisms based on electron and energy transfer, and degradation pathways of HMCs. We also emphasize the effects of environmental water constituents, namely pH, inorganic ions, and natural organic matter (NOM), on HMCs decomplexation. Ultimately, we identify the existing challenges and perspectives that will steer the direction of advancing PS-based AOPs to remove HMCs.
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