A new ZnII-MOF was obtained with a 4,6-connected network topology structure and exhibited obvious fluorescence enhancement, nanosecond lifetime, large quantum yield, and moderate water vapour adsorption property.
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A new ZnII-MOF was obtained with a 4,6-connected network topology structure and exhibited obvious fluorescence enhancement, nanosecond lifetime, large quantum yield, and moderate water vapour adsorption property.
In this study, a PEGylated iron MOF nanoparticle as a new and effective agent for Fenton cancer therapy method is reported. This stable nanoparticle, which can destroy cancer cells using the cells’ H2O2 does not have the issues such as low stability, high aggregation, and poor selectivity that have been reported for similar nanoparticles.
A simple but potent antitubercular compound, 2-(decylsulfonyl)acetamide, loses activity when its amide is converted to a thioamide. However, the latter compound has increased potency against Staphylococcus aureus, but this appears due to a general increase in its toxicity.
This paper discusses the challenges of passivating a range of defects in silicon solar cells using atomic hydrogen. It highlights the limited effectiveness of the conventional hydrogenation processes achieved using fast-firing, and the improved passivation that can be achieved for light-induced defects by using illuminated annealing to control hydrogen charge states.
End-blocked silanized side-chain fluoroalkyl polyethers with controllable molecular weight were synthesised. Self-assembled monolayers of the silanlized fluoropolyethers on silicon substrates were fabricated using the liquid phase deposition method. The migration of fluoroalkyl groups upon heating generated a porous surface, which improved the hydrophobicity.
We use NIRS scans of ground maize samples to estimate their aflatoxin level. Absorbance tends to be low for samples with extremely high levels of aflatoxin. Our study examines the performance of NIRS using a large heterogeneous collection of maize samples collected at several sites in Kenya and Tanzania. We compare machine learning techniques with the more traditional chemometric approaches.
The electrochemical reduction mechanism of 2,4-dinitrotoluene (DNT) in ionic liquids is studied. Stepwise reduction of the two nitro groups gave rise to two distinctive peaks. The first peak becomes chemically irreversible at increasing concentration, and digital simulation suggests that the follow-up chemical steps involve dimerisation of the radical anion, and/or abstraction of a proton from another DNT molecule.
N,N-dimethyl-N′-chlorosulfonyl chloroformamidine 1a underwent reactions with various anilines 6 to give the benzo[e][1,2,4]thiadiazine dioxides 8 and bis-anilino adducts 9, along with some unexpected products, particularly when sterically hindered anilines were used. In such cases, the [1,3,2,4,6]dithiatriazine 1,1,3,3-tetraoxides 17 and, on occasion, the 4-(arylimino)-[1,3,5]triazin-2-amines 14, were produced.
Direct H2O2 fuel cell (DHPFCs) utilise electrochemically generated H2O2 and are well suited for renewable energy storage and transportation. Given that H2O2 acts as both the fuel and the oxidant in these systems, DHPFCs can be designed to be membraneless and fully reversible, giving them several advantages over other ‘clean-energy’ fuel cells. This review examines the recent research into electrochemical H2O2 generation and its use in DHPFCs.
The selective adsorption and separation or photocatalytic degradation of organic dyes with PAA hydrogels comprising polymer brushes and chitosan as crosslinker is demonstrated.
In solvate ionic liquids composed of lithium bis(fluorosulfonyl)amide (Li[FSA]) and glyme, charge transport through the ligand exchange of Li+ emerges when the molar ratio of Li[FSA]/glyme is higher than 1.
Mixing block copolymers and proteins is an easy way to encapsulate the charged payload in nanoparticles. The resulting polyion complex micelles – PIC micelles – are stable in aqueous solution while the protein is protected against degradation. This approach can be used to deliver therapeutic proteins, and also to stabilise enzymes.
Non-ionic surfactants were synthesised based on myristic acid, epichlorohydrin, and propylene oxide. By interaction with ethanolamines, non-ionics were transformed into cationics. A structure–surface activity relationship was established. A very high petrocollecting capacity of the cationics was revealed.
Ruthenium alkynyl complexes are highly efficient NLO-active molecules; dipolar examples exhibit record values of quadratic optical non-linearity, and specific octupolar ruthenium alkynyl stars and dendrimers show record values of cubic optical non-linearity and multiphoton absorption cross-sections. Protonation–deprotonation, oxidation–reduction, and photoisomerization stimuli have been employed at certain ruthenium alkynyl complexes to demonstrate NLO switching across a record number of states.
The fluorine-18 radiolabelling optimisation of the selective muscarinic M2 imaging agent [18F]FP-TZTP was performed using continuous-flow microfluidics. When scaled up to production-level quantities, [18F]FP-TZTP could be produced using decreased amounts of reagents in good radiochemical yield and molar activity.
The homogeneous strong base catalyst-free acylation of cellulose using 2,2,2-trifluoroethyl ester as the acyl donor in an ionic liquid, [P1ME][OAc] as the solvent has been accomplished.
ϵ-caprolactam (CL) was used as a model to illustrate the evolution of silver nanoparticles in the lactam’s medium. This evolution includes two different stages: (1) particles being stabilised at <5 nm because of face-bound CL and (2) the Ostwald ripening cooperated with continuous Ag+ reduction, producing the resultant particles with different size distribution.
We report a simple synthesis of four new Ni2B-based nanocomposites, namely Ni2B@ZrCl4, Ni2B@Cu2O, Ni2B@CuCl2, and Ni2B@FeCl3, which were characterized by FT-IR, XRD, SEM, and EDX. The catalytic applications of these nanocomposites were successfully evaluated in the wet-solvent-free reduction of nitroarenes to arylamines with NaBH4 at room temperature by a mechanochemical grinding technique.
This review covers recent advances in photodecarboxylation reactions involving phthalimides. The intramolecular reaction protocol allows for the easy construction of medium- to macrocyclic ring systems. In contrast, photodecarboxylative additions have been developed as versatile alternatives to Grignard-type reactions. Selective photodecarboxylative transformations have been realized in advanced photoreactors.
Proton affinities can be accurately derived using DFT. Correlations between proton affinities and their pKas is good within chemical families. Categorisation based on functional groups results in reasonable linear relationships and predicting pKa of 90 drugs based on their proton affinities was moderately successful.
A protic ionic liquid (PIL) composed of 1,8-diazabicyclo[5.4.0]-undec-7-ene (DBU) and acetic acid can dissolve cellulose under mild conditions and catalyse its transesterification. In this study, PILs composed of DBU and carboxylic acids with varying alkyl chain lengths were prepared, and the relationship between physicochemical properties and chemical structures was investigated.
The synthesis of a homochiral 2-iodocyclohexenone related to the C-ring of the title alkaloids is reported.
This highlight article focuses on some seminal discoveries in organopalladium(IV) chemistry and the implications and notable applications of these findings in contemporary palladium catalysis and in particular C–H activation.
A magnetic nanocatalyst, which could be used to catalyse the hydrolytic breakage of β-1,4-glycosidic bonds, was prepared. This recyclable nanocatalyst could efficiently catalyse the hydrolysis of cellobiose to glucose and cellulose to reducing sugar under relatively moderate conditions, and the catalytic system showed good selectivity of product.
Owing to the rapid rise in antibiotic resistance, the development of novel antimicrobial compounds with unique mechanisms of action is of utmost importance. In this study, new fimbrolide analogues were synthesised and were found to possess antimicrobial activity targeting quorum sensing, which is important for bacterial communication. These compounds represent promising leads towards the development of a new class of antibacterials.