Electrochemical detection of mercuric(ii) ions in aqueous media using glassy carbon electrode modified with synthesized tribenzamides and silver nanoparticles.

This study reports the synthesis, characterization, and mercuric ion detection ability of novel tribenzamides having flexible and rigid moieties. -{4-[2-(1,3-Benzoxazolyl)]phenyl}-3,5-,'-bis(4-alkyloxybenzoyl)benzamides (TBa-TBc) were synthesized from newly synthesized diamine, -(1,3-benzoxazol-2-yl-phenyl)-3,5-diaminobenzamide (BODA) and -alkoxybenzoic acids (-ABA) by amidation reaction. Structural characterization of the synthesized compounds was done through spectroscopic techniques (FT-IR and NMR).

Exploration of microplastic pollution with particular focus on source identification and spatial patterns in riverine water, sediment and fish of the Swat River, Pakistan.

Microplastics (MPs) have been reported as an emerging xenobiotic organic pollutant in freshwater ecosystems and a universal hazard for ecosystems because of the rapid increase in global demand. The present study was conducted to explore MPs' occurrence, abundance and spatial distribution in sediment, water and samples, collected from the Swat River. ATR-FTIR spectroscopy was used for chemical characterization of visually identified MPs by using standard protocols such as digestion using HO, density separation using ZnCl, vacuum filtration with borosilicate glass micro filter papers and digital microscopy using a stereomicroscope connected with a camera.

Copper sulfide nanostructures: synthesis and biological applications.

Over the past few years, considerable attention has been paid to biomedical applications of copper sulfide nanostructures owing to their enhanced physiochemical and pharmacokinetics characteristics in comparison to gold, silver, and carbon nanomaterials. The small-sized Cu S nanoparticles have the advantage to absorb efficiently in the near-infrared region (NIR) above 700 nm and the absorption can be tuned by altering their stoichiometries. Moreover, their easy removal through the kidneys overpowers the issue of toxicity caused by many inorganic substances.

Bimetallic cobalt-iron diselenide nanorod modified glassy carbon electrode: an electrochemical sensing platform for the selective detection of isoniazid.

The increasing demand of a sensitive and portable electrochemical sensing platform in pharmaceutical analysis has developed widespread interest in preparing electrode materials possessing remarkable properties for the electrochemical determination of target drug analytes. Herein, we report the synthesis, characterization and application of bimetallic cobalt-iron diselenide (FeCoSe) nanorods as electrode modifiers for the selective detection of a commonly used anti-tuberculosis drug Isoniazid (INZ). We prepared FeCoSe nanorods by a simple hydrothermal route and characterized these by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX) and temperature-programmed reduction (TPR) techniques.

TiO Co-doped with Zr and Ag shows highly efficient visible light photocatalytic behavior suitable for treatment of polluted water.

The objective of this study is to analyze the effects of zirconium (Zr) and silver (Ag) doping on the photoactivity of titania (TiO). Zr-Ag (ZA) co-doped TiO products were fabricated sol-gel technique and their properties (structural and chemical) were characterized. The weight ratio of TiO was fixed, while weight ratios of Zr and Ag were varied from 2 to 4, 6 and 8 wt% while synthesized samples were calcined at 400 °C for 3 h.

Facile photocatalytic reduction of carcinogenic Cr(vi) on Fe-doped copper sulfide nanostructures.

In this study, Fe-doped copper sulfide nanoparticles (NPs) were investigated for the solar-assisted reduction of Cr ions in raw water. The Fe-doped NPs were synthesized by decomposing copper(ii) ,-diphenylmethylpiperazinecarbamodithioate a facile single-step, one-pot solvothermal method in the presence of iron salt. The Cr photoreduction data were fit to a pseudo-first-order kinetic model and a Langmuir model.

Synthesis, X-ray crystal structure elucidation and Hirshfeld surface analysis of -((4-(1-benzo[]imidazole-2-yl)phenyl)carbamothioyl)benzamide: investigations for elastase inhibition, antioxidant and DNA binding potentials for biological applications.

The interest in the present study pertains to the development of a new compound based upon a benzimidazole thiourea moiety that has unique properties related to elastase inhibition, free radical scavenging activity and its DNA binding ability. The title compound, -(4-(1-benzo[]imidazol-2-yl)phenyl)-3-benzoyl thiourea (CHNOSHO:TUBC), was synthesized by reacting an acid chloride of benzoic acid with potassium thiocyanate (KSCN) along with the subsequent addition of 4-(1-benzo[]imidazol-2-yl)benzenamine a one-pot three-step procedure. The structure of the resulting benzimidazole based thiourea was confirmed by spectroscopic techniques including FTIR, H-NMR, C-NMR and single crystal X-ray diffraction and further examined by Hirshfeld surface analysis.

The (Himalayan columbine) mediated synthesis of nanoceria for diverse biomedical applications.

Herein, we report an eco-friendly, facile, one-pot, green synthesis of nanoceria for multiple biomedical applications. In the study, cerium oxide nanoparticles (CeO-NPs) were synthesized using a simple aqueous extract of as an effective reducing and capping agent. The biosynthesized nanoparticles were characterized UV-vis spectroscopy, X-ray powder diffraction (XRD), high-performance liquid chromatography (HPLC), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy.

The protective potential of a ethyl acetate fraction against CCl-induced oxidative stress in the cardiac tissue of rats.

Secondary metabolites present in medicinal plants offer a golden opportunity to fight different ailments, such as cancer, infections, diabetes, neurodegenerative and cardiovascular diseases, The traditional use of various parts of is known to serve as a cure for pneumonia, pain, jaundice, malaria, fracturing of bones, and internal wounds. The aim of this research was to validate the antioxidant and cardio-protective properties of leaves. The antioxidant potential was evaluated by employing different assays on the crude methanol extract, as well as its derived fractions.

Biferrocenyl Schiff bases as efficient corrosion inhibitors for an aluminium alloy in HCl solution: a combined experimental and theoretical study.

The corrosion inhibitive capabilities of some ferrocene-based Schiff bases on aluminium alloy AA2219-T6 in acidic medium were investigated using Tafel polarization, electrochemical impedance spectroscopy (EIS), weight loss measurement, FT-IR spectroscopy and scanning electron microscopic (SEM) techniques. The influence of molecular configuration on the corrosion inhibition behavior has been explored by quantum chemical calculation. Ferrocenyl Schiff bases 4,4'-((((ethane-1,2-diylbis(oxy))bis(4,1-phenylene))bis(methaneylylidene))bis(azaneylylidene))bisferrocene (Fcua), 4,4'-((((ethane-1,2-diylbis(oxy))bis(2-methoxy-1,4-phenylene))bis(methaneylylidene))bis(azaneylylidene))bisferrocene (Fcub) and 4,4'-((((ethane-1,2-diylbis(oxy))bis(2-ethoxy-1,4-phenylene))bis(methaneylylidene))bis(azaneylylidene))bisferrocene (Fcuc) have been synthesized and characterized by FT-IR, H and C NMR spectroscopic studies.

Biomarker selection and imaging design in cancer: A link with biochemical pathways for imminent engineering.

Malignant cells reprogram metabolic pathways to meet the demands of growth and proliferation. These altered manners of metabolism are now identified as hallmarks of cancer. Studies have revealed tumor cells alter specific pathways such as glycolysis, fatty acid synthesis and amino acid synthesis to support their proliferation.

Bis-Schiff bases of 2,2'-dibromobenzidine as efficient corrosion inhibitors for mild steel in acidic medium.

In this work, three new bis-Schiff bases, namely 1,1'-(2,2'-dibromo-[1,1'-biphenyl]-4,4'-diyl)bis(-phenylmethanimine) (BNSB01), 1,1'-(2,2'-dibromo-[1,1'-biphenyl]-4,4'-diyl)bis(-(4-bromophenyl)methanimine) (BNSB02) and 4,4'-(((2,2'-dibromo-[1,1'-biphenyl]-4,4'-diyl)bis(methanylylidene))bis(azanylylidene))diphenol (BNSB03), were synthesized. These Schiff bases were evaluated for their corrosion inhibition ability on mild steel specimens in 0.5 M HCl by using electrochemical and weight loss techniques.

Recent developments in the synthesis of regioregular thiophene-based conjugated polymers for electronic and optoelectronic applications using nickel and palladium-based catalytic systems.

Thiophene-based conjugated polymers hold an irreplaceable position among the continuously growing plethora of conjugated polymers due to their exceptional optical and conductive properties, which has made them a centre of attention for the past few decades and many researchers have contributed tremendously by designing novel strategies to reach more efficient materials for electronic applications. This review aims to highlight the recent (2012-2019) findings in design and synthesis of novel thiophene-based conjugated polymers for optical and electronic devices using organometallic polycondensation strategies. Nickel- and palladium-based protocols are the main focus of this account.

Correction: Acridinedione as selective flouride ion chemosensor: a detailed spectroscopic and quantum mechanical investigation.

[This corrects the article DOI: 10.1039/C7RA11974G.].

Synthesis of new Pro-PYE ligands as co-catalysts toward Pd-catalyzed Heck-Mizoroki cross coupling reactions.

The present research work describes the synthesis of five new ligands containing pyridinium amine, [HL][OTf]-[HL][I] from two new precursors, [P ][I] and [P ][CFSO]. The structure elucidations of the compounds were confirmed by multinuclear NMR (H, C), FT-IR and by single crystal XRD techniques. Theoretical DFT studies were carried out to get better insight into the electronic levels and structural features of all the molecules.

Experimental and theoretical insights into the corrosion inhibition activity of novel Schiff bases for aluminum alloy in acidic medium.

Three novel Schiff bases, namely -(4-((4-((phenylimino)methyl)phenoxy)methoxy)benzylidene)benzenamine (UA), -(3-methoxy-4-((2-methoxy-4-((phenylimino)methyl)phenoxy)methoxy)benzylidene)benzenamine (UB), and -(3-ethyl-4-((2-ethyl-4-((phenylimino)methyl)phenoxy)methoxy)benzylidene)benzenamine (UC), were synthesized and their structures were elucidated through diverse spectroscopic techniques such as FT-IR, GC-MS, H NMR and C NMR. The corrosion inhibition effect of these Schiff bases on aluminum alloy AA2219-T6 in acidic medium was explored using weight loss, Tafel polarization, and electrochemical impedance spectroscopy. Theoretical quantum chemical calculations using density functional theory were employed to determine the adsorption site.

A facile and concise route to (hydroxybenzoyl)pyrido[2,3-]pyrimidine heterocycle derivatives: synthesis, and structural, spectral and computational exploration.

In this work, we report the efficient synthesis of novel (hydroxybenzoyl)pyrido[2,3-]pyrimidine heterocycle derivatives: 6-(2-hydroxy-5-methylbenzoyl)-1-methylpyrido[2,3-]pyrimidine-2,4(1,3)-dione (6a), 6-(5-fluoro-2-hydroxybenzoyl)-1-methylpyrido[2,3-]pyrimidine-2,4(1,3)-dione (6b), 6-(5-ethyl-2-hydroxybenzoyl)-1-methylpyrido[2,3-]pyrimidine-2,4(1,3)-dione (6c) and 6-(2-hydroxy-5-isopropylbenzoyl)-1-methylpyrido[2,3-]pyrimidine-2,4(1,3)-dione (6d). The chemical structures of the title compounds were ascertained by spectral techniques including H, C NMR, UV-visible and FT-IR spectroscopy as well as single-crystal X-ray diffraction analysis. Additionally, density functional theory (DFT) and time-dependent (TD-DFT) computation were adopted to analyze the electronic structures of 6a-d.

Preparation of an FeNi MOF on nickel foam as an efficient and stable electrocatalyst for the oxygen evolution reaction.

Metal-organic frameworks (MOFs) as versatile templates for preparing transition metal compounds has received wide attention. Benefiting from their diversified spatial structure and controllable chemical constituents, they have become a research hotspot in the field of electrocatalytic water splitting. Herein, FeNi-MIL-88B MOF on nickel foam (FeNi MOF/NF) has been prepared through a one-pot method growth process.

Mechanistic evaluation of phytochemicals in breast cancer remedy: current understanding and future perspectives.

Breast cancer is one of the most commonly diagnosed cancers around the globe and accounts for a large proportion of fatalities in women. Despite the advancement in therapeutic and diagnostic procedures, breast cancer still represents a major challenge. Current anti-breast cancer approaches include surgical removal, radiotherapy, hormonal therapy and the use of various chemotherapeutic drugs.

Facile Electrochemical Intramolecular Amination of Urea-Tethered Terminal Alkenes for the Synthesis of Cyclic Ureas.

Facile intramolecular amination of unactivated alkenes has been achieved by using electricity as a catalyst that helps to generate an intermediate and accelerates formation of cyclic ureas in high yields. Using this method, no metal catalysts were used. During electrolysis, a nitrogen radical was formed at the urea substrate that cyclised with the alkene and generated a terminal carbon radical which further formed a bond with the 2,2,6,6-tetramethylpiperidine--oxyl radical (TEMPO).

Stabilized fabrication of anatase-TiO/FeS (pyrite) semiconductor composite nanocrystals for enhanced solar light-mediated photocatalytic degradation of methylene blue.

A novel visible light active TiO/FeS semiconductor photocatalyst was synthesized by a simple wet chemical process. X-ray diffraction (XRD) was used to analyze the anatase TiO and pyrite structures in FeS/TiO nanocrystals. Scanning electron microscopy (SEM) confirmed the spherical morphology of composite nanocrystals.

Synthesis and characterization of graphene oxide sheets integrated with gold nanoparticles and their applications to adsorptive removal and catalytic reduction of water contaminants.

Here, we report the facile synthesis of graphene oxide-gold (GO-Au) nanocomposites and their use as adsorbents for the removal of toxic industrial dyes from water and as catalysts for the individual and simultaneous reduction of a dye and a nitro compound in aqueous medium. GO sheets were prepared using a modified Hummers method while Au nanoparticles were integrated on GO sheets by reducing Au(iii) ions on the surfaces of GO sheets using sodium citrate as a reducing agent. The prepared composite was characterized with field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), elemental dispersive X-ray analysis (EDX), X-ray diffraction (XRD), Fourier transform infra-red (FT-IR) spectroscopy and thermal gravimetric analysis (TGA).

Acridinedione as selective flouride ion chemosensor: a detailed spectroscopic and quantum mechanical investigation.

The use of small molecules as chemosensors for ion detection is rapidly gaining popularity by virtue of the advantages it offers over traditional ion sensing methods. Herein we have synthesized a series of acridine(1,8)diones (7a-7l) and explored them for their potential to act as chemosensors for the detection of various anions such as fluoride (F), acetate (OAc), bromide (Br), iodide (I), bisulfate (HSO ), chlorate (ClO ), perchlorate (ClO ), cyanide (CN), and thiocyanate (SCN). Acridinediones were found to be highly selective chemosensors for fluoride ions only.