Electronic properties of polyaniline-graphene nanocomposites synthesized via solution mixing method.

A key advantage of combining the exceptional properties of graphene with conducting polymers, lies in their remarkable property tunability through filler additions into polymer matrices, with synthesis routes playing a crucial role in shaping their characteristics. In this work, we examine the electronic properties of polyaniline and graphene nanocomposites synthesized via a simple solution mixing method, which offers advantages such as ease of use and efficiency. Increasing graphene content enhances nanocomposite conductivity, and a percolation effect is observed.

Functionalized porous carbon microspheres packed column for solid phase extraction and preconcentration of trace metal ions in food and water samples.

Porous materials play a crucial role in the extraction of trace analytes; yet, the attainment of high selectivity and efficient regeneration continues to pose a considerable problem. In this study, we employed a green method to synthesize porous carbon microspheres. These microspheres were subsequently functionalized with aminophosphonic acid to facilitate the extraction of heavy metal ions from real samples.

Selective Monoborylation of Methane by a Mono Bipyridyl-Nickel(II) Hydride Catalyst.

We report the development of an earth-abundant metal catalyst for methane C-H borylation. The post-synthetic metalation of bipyridine-functionalized zirconium metal-organic framework (MOF) with NiBr, followed by treatment with NaEtBH affords MOF-supported monomeric bipyridyl-nickel(II) dihydride species via active site isolation. The heterogeneous and recyclable nickel catalyst selectively borylates methane at 200 °C using pinacolborane (HBpin) to afford CHBpin in 61 % yield with a turnover number (TON) up to 1388.

A changeable critical state for a switchable photocurrent direction the photo-electrochemical photocurrent polarity switching effect in BiFeO nanoparticulate films.

The photoelectrochemical photocurrent switching (PEPS) effect to change the photocurrent direction from cathodic to anodic external bias is an important phenomenon. Specifically, tuning the critical state or the potential corresponding to a switchable photocurrent direction through easily controllable parameters is crucial for developing efficient photo-electrocatalyst systems. Although the PEPS effect has been reported in quite a few recently published studies, the changeable critical state has not yet been demonstrated.

Designer pseudopeptides: autofluorescent polygonal tubes Phe-zipper and triple helix.

Chemists are increasingly turning to biology for inspiration to develop novel and superior synthetic materials. Here, we present an innovative peptide design strategy for tubular assembly. In this simple design, a phenylene urea unit is introduced as an aglet at the N-terminus of the peptide.

growth of CaMoO on electropolymerized PANI as a hybrid electrocatalyst for enhanced oxygen evolution.

Electrochemical water splitting stands as a promising avenue for sustainable hydrogen production, with the oxygen evolution reaction (OER) playing a pivotal role. Efficient and durable electrocatalysts are crucial for expediting the sluggish kinetics of OER. In this work, we investigate the synthesis and performance of a novel CaMoO/polyaniline (CaMoO/PANI) composite catalyst for OER.

MOFabric: an effective and wearable protective garment towards CWA detoxification.

In current trends, an imminent development of self-detoxification filters is highly desirable against exposure to chemical warfare agents (CWAs). Exploiting protective materials that can be applicable in day-to-day life for instantaneous detoxification will be of immense importance. The available technologies in the current scenario are susceptible to secondary emission and pose a need for an alternate design strategy for effective degradation.

Ubiquitin specific peptidase (USP37) mediated effects in microscaffold-encapsulated cells: a comprehensive study on growth, proliferation and EMT.

Though significant advances have been made in developing therapeutic strategies for cancer, suitable models for mechanistically identifying relevant drug targets and understanding disease progression are still lacking. Most studies are generally performed using two-dimensional (2D) models, since these models can be readily established and allow high throughput assays. However, these models have also been reported as the reason for unreliable pre-clinical information.

Substitution of lead with tin suppresses ionic transport in halide perovskite optoelectronics.

Despite the rapid rise in the performance of a variety of perovskite optoelectronic devices with vertical charge transport, the effects of ion migration remain a common and longstanding Achilles' heel limiting the long-term operational stability of lead halide perovskite devices. However, there is still limited understanding of the impact of tin (Sn) substitution on the ion dynamics of lead (Pb) halide perovskites. Here, we employ scan-rate-dependent current-voltage measurements on Pb and mixed Pb-Sn perovskite solar cells to show that short circuit current losses at lower scan rates, which can be traced to the presence of mobile ions, are present in both kinds of perovskites.

Skeletal rearrangement through photocatalytic denitrogenation: access to C-3 aminoquinolin-2(1)-ones.

The addition of an amine group to a heteroaromatic system is a challenging synthetic process, yet it is an essential one in the development of many bioactive molecules. Here, we report an alternative method for the synthesis of 3-amino quinolin-2(1)-one that overcomes the limitations of traditional methods by editing the molecular skeleton a cascade C-N bond formation and denitrogenation process. We used TMSN as an aminating agent and a wide variety of 3-ylideneoxindoles as synthetic precursors for the quinolin-2(1)-one backbone, which demonstrates remarkable tolerance of sensitive functional groups.

Electrocatalytic study of the hydrogen evolution reaction on MoS/BP and MoSSe/BP in acidic media.

Molecular hydrogen (H) production by the electrochemical hydrogen evolution reaction (HER) is being actively explored for non-precious metal-based electrocatalysts that are earth-abundant and low cost like MoS. Although it is acid-stable, its applicability is limited by catalytically inactive basal planes, poor electrical transport and inefficient charge transfer at the interface. Therefore, the present work examines its bilayer van der Waals heterostructure (vdW HTS).

Effect of Ga substitution with Al in ZSM-5 zeolite in methanethiol-to-hydrocarbon conversion.

The catalytic properties of conventional H-[Al]-ZSM-5 and gallium-substituted H-[Ga]-ZSM-5 were evaluated in the conversion of methanethiol to ethylene (CHSH → 1/2CH + HS). Dimethyl sulfide (DMS), aromatics, and CH were formed as byproducts on the H-[Al]-ZSM-5 catalyst. The introduction of Ga into the ZSM-5 structure provided a high ethylene yield with relatively high selectivity for olefins.

Green solvents, materials, and lead-free semiconductors for sustainable fabrication of perovskite solar cells.

Perovskite materials research has received unprecedented recognition due to its applications in photovoltaics, LEDs, and other large area low-cost electronics. The exceptional improvement in the photovoltaic conversion efficiency of Perovskite solar cells (PSCs) achieved over the last decade has prompted efforts to develop and optimize device fabrication technologies for the industrial and commercial space. However, unstable operation in outdoor environments and toxicity of the employed materials and solvents have hindered this proposition.

Inhibition and eradication of biofilms by secondary metabolites of EMB25.

Millions of people worldwide have been impacted by biofilm-associated disorders, which are impregnable owing to frequent changes in surface antigens and gene expression. Globally, about 11% of nosocomial infections, including cystic fibrosis, chronic wound infections, and post-surgical infections, are caused by , the most prevalent Gram-negative bacterial species. Moreover, biofilms are highly resistant to the host's immune system, and exhibit increased tolerance to stress factors such as starvation, dehydration, and antimicrobials.

Mechanochemical Synthesis of Lead-Free Perovskite-Like MA Bi I for Photo-Catalytic Hydrogen Production.

In this study, a highly air stable and eco-friendly methyl ammonium bismuth iodide (MA Bi I ) perovskite-like material has been prepared. After physiochemical characterizations, the synthesized MA Bi I was utilized as photo-catalyst towards hydrogen production. It is important to design and synthesize lead (Pb)-free perovskite-like material (MA Bi I ) for photo-catalytic hydrogen-production applications.

Pentafluorophenol (C F OH) Catalyzed Pictet-Spengler Reaction: A Facile and Metal-Free Approach Towards Tetrahydro-β-Carbolines.

Herein, we have disclosed pentafluorophenol as an operative catalyst for synthesizing (spirocyclic) tetrahydro-β-carbolines via the Pictet-Spengler reaction. This straightforward catalytic protocol works under mild conditions resulting indole alkaloids in excellent yield with remarkable functional group tolerance, including late-stage modifications. This transformation demonstrates a practical and adaptable approach to produce a highly effective gram-scale synthesis of the natural alkaloid Komavine and enables the synthesis of the commercial drug Tadalafil.

Cooperative Friedel-Crafts Alkylation of Electron-Deficient Arenes via Catalyst Activation with Hexafluoroisopropanol.

A Friedel-Crafts alkylation of electron-deficient arenes with aldehydes through ''catalyst activation'' is presented. Through hydrogen bonding interactions, the solvent 1,1,1,3,3,3, -hexafluoroisopropanol (HFIP) interacted with the added Brønsted acid catalyst pTSA•H O, increasing its acidity. This activated catalyst enabled the Friedel-Crafts alkylation of electron-neutral as well as electron-deficient arenes.

Correction: Amyloid fibrillation of the glaucoma associated myocilin protein is inhibited by epicatechin gallate (ECG).

[This corrects the article DOI: 10.1039/D2RA05061G.].

Construing the metaxin-2 mediated simultaneous localization between mitochondria and nucleolus using molecular viscometry.

Fluorescent probes for specific inter-organelle communication are of massive significance as such communication is essential for a diverse range of cellular events. Here, we present the microviscosity-sensitive fluorescence marker, Quinaldine Red (QR), and its dual organelle targeting light-up response in live cells. This biocompatible probe was able to localize in mitochondria and nucleolus simultaneously.

Air and water stable germacarbonyl compounds.

Germacarbonyl compounds are the germanium analogs of carbonyl compounds requiring an inert atmosphere for stability. Making these compounds survive the ambient conditions was not feasible given the lability of the Ge[double bond, length as m-dash]E bonds (E = O, S, Se, Te). However, the first examples of germacarbonyl compounds synthesized under ambient conditions by taking advantage of dipyrromethene ligand stabilization are detailed here; the isolated compounds are thiogermanone 3, selenogermanone 4, thiogermacarboxylic acid 6, selenogermacarboxylic acid 7, thiogermaester 9, selenogermaester 10, thiogermaamide 12, and selenogermaamide 13 with Ge[double bond, length as m-dash]E bonds (E = S, Se).

Amyloid fibrillation of the glaucoma associated myocilin protein is inhibited by epicatechin gallate (ECG).

Inherited glaucoma is a recent addition to the inventory of diseases arising due to protein misfolding. Mutations in the olfactomedin (OLF) domain of myocilin are the most common genetic cause behind this disease. Disease associated variants of m-OLF are predisposed to misfold and aggregate in the trabecular meshwork (TM) tissue of the eye.

Brønsted-Acid-Catalyzed One-Pot Synthesis of β,β-Diaryl Esters: Direct Regioselective Approach to Diverse Arrays of 3-Aryl-1-indanone Cores.

A three-component, solvent-dependent, Brønsted-acid-catalyzed reaction of benzaldehydes, silyl enolates and arene nucleophiles has been developed for the synthesis of potential drug candidate 3-aryl-1-indanones. This reaction features the formation of three C-C bonds, high regioselectivity in a one-pot strategy, broad substrate generality, facile scalability (1.04g), high functional group tolerance and viable substrates.

Transition-Metal-Free Dehydropolymerization of Phosphine-Boranes at Ambient Temperature.

Stoichiometric reaction of phosphine-borane adducts RR'PH⋅BH (R=Ph, R'=H, Ph, Et, and R=R'= Bu) with the strong acid HNTf (Tf=SO CF ) leads to H elimination and the formation of the triflimido derivatives, RR'PH⋅BH (NTf ). Subsequent deprotonation by using bases, such as diisopropylethylamine or the carbene IPr (IPr=N,N'-bis(2,6-diisopropylphenyl)imidazol-2-ylidene), led to the formation of P-mono- or -disubstituted polyphosphinoboranes [RR'P-BH ] . Evidence for the intermediacy of transient phosphinoborane monomers, RR'PBH , was provided by trapping reactions.