A novel Schiff base ligand (L) has been synthesized using 4-(2-amino ethyl) benzene-1,2-diol (Dopamine) and 1,4 benzoquinone. Co(II), Ni(II), Cu(II) and Zn(II) complexes with this hexadentate ligand have been synthesized with metal:ligand (1:1) stoichiometry. The Schiff base ligand and its metal complexes have been characterized by elemental analysis, molar conductance, magnetic susceptibility, infrared

Allyl triphenylphosphonium bromide based mito-tracker capped silicon quantum dot (Mito-SiQDs) has been synthesized through an inverse micelle process. It was then fully characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy, dynamic light scattering techniques and X-ray photoelectron spectroscopic method. Energy dispersive X-ray spectroscopy analyses of the quantum

In the present study, homogeneous liquid-liquid microextraction via flotation assistance method is described for preconcentration of trace amounts of Mn(II). 1-(2-pyridylazo)-2-naphthol (PAN) is used as a ligand. The enriched analyte in the floated organic phase has been determined by inductively coupled plasma-mass spectrometry (ICP-MS). In this work, low density organic solvent is used and there

The strain promoted [3+2] cycloaddition reaction of benzyl azide with cyclooctyne has been studied within the molecular electron density theory (MEDT) at the MPWB1K/6-311G(d,p) computational level. This reaction takes place through a one-step mechanism with activation free energy of 27.1 kcal mol-1 in gas phase and 30.2 kcal mol-1 in acetonitrile. The activation enthalpies are 13.8 and 16.5 kcal mol-1

Four imidazo-phenanthroline (IP) based ligands and its corresponding copper polypyridyl complexes have been prepared [Cu(L1-L4)2]2+ and characterized by various physicochemical techniques. Herein we are reporting the CT-DNA (calf-thymus DNA) binding & anti-cancer affinity of ligands (L1-L4) as well as complexes (C1-C4). The DNA binding affinity of synthesized C1-C4 has been carried out by using spectroscopic

[Ni(dcda-O-Me)2]2+ (1), [Ni(dcda-O-Et)2]2+ (2), [Ni(dcda-O-nPr)2]2+ (3), and [Ni(dcda-O-nBu)2]2+ (4) complexes (dcda-O-R is dicyandiamide ligands with alkoxy-derived) have been optimized in the gas phase at B3LYP/LANL2DZ/6-31+G(d,p) level. Computational structure characterization has been performed from the structural parameters, IR spectra, 1H-NMR, 13C-NMR chemical shift values. It has been found

A new yttrium complex, [Y2(H2Dhbds)3(phen)2]·[Y2(H2Dhbds)2(H2Thbs)(phen)2] (1) (Na2H2Dhbds = 4,5-dihydroxy-1,3-benzenedisulfonic acid disodium salt; NaH3Thbs = 2,3,5-trihydroxy-1-benzenesulfonic acid sodium salt), has been synthesized and structurally characterized. Complex 1 consists of two dinuclear structural units bridged by H2Dhbds2- and H2Thbs2- ligands, where phen molecules act as N, N-bidentate

Dielectric relaxation parameters of Isopropyl acetate (IPA)-xylene mixtures with different concentrations and temperatures have been measured in the frequency range of 10 MHz to 30 GHz using time domain reflectometry technique. Static dielectric constant, relaxation time, excess permittivity, excess relaxation time, Bruggeman factor, Kirkwood correlation factor and thermodynamic parameters have been

Environmental pollution and its consequences are of global concern. There is an urgent need of development of simple, low-cost detection or diagnostic point of care devices to detect, analyze and determine the pollutants in various environmental, food and biological samples. Such development will be critically important for improvisation of human health and quality of life. Toxic heavy metals potential

Ferrite supported copper nanocomposite catalyst has been synthesized and characterized by TEM, SEM-EDS mapping, XRD, XPS and ICP-AES analysis. This nanocomposite is found to be more efficient and versatile towards carbonyl and nitro reduction under mild reaction condition with very good yield and turn over number. The catalyst is magnetically recoverable and also reusable for a minimum of four catalytic

Chloroquine (CQ) and Hydroxychloroquine (HCQ) have a low safety margin and its toxic effects are closely related to the ingested dose. Both drugs were tested for reactivity under different conditions but still need to be understood. A thermodynamic and kinetic study with control the electronic properties also show the reaction of the molecule. In this study, theoretical calculations have been performed

The densities (ρ) and speeds of sound (u) for glycine in aqueous solutions of (0.01, 0.02, 0.03, and 0.04) mol·kg-1 sulphathiazole drug have been measured at T = (288.15, 293.15, 298.15, 303.15 and 308.15) K, using vibrating tube digital densimeter and sound analyser Anton–Paar Model DSA - 5000. The apparent molar properties like apparent molar volume (Vφ), apparent molar adiabatic compressibility

The binding and sensing abilities of pyrimidine based fluorescence chemosensor L towards different anions such as F-, Cl-, Br-, I-, NO3-, ClO4-, H2PO4- and HSO4- have been examined by fluorescence spectroscopy in DMSO-H2O (7: 3, v/v). Upon successive addition of various anions to DMSO-H2O solutions of L; quenching in emission fluorescence is observed at 480 nm. Analysis of fluorescence emission changes

From tensiometric measurements, critical micelle concentration (CMC), maximum surface excess concentration, minimum area per molecule at the air-liquid interface and thermodynamic parameters of micellization have been determined for an anionic surfactant: bis-(2-ethylhexyl) sodium sulfosuccinate (AOT) in aqueous medium. Effects on the above physico-chemical properties due to added electrolytes: Na2SO4

The electrodeposition of reduced graphene oxide and carbon nanotube (ErGO/CNTs) composite film modified electrode has been fabricated by electrochemical reduction of graphene oxide (GO) and MWNTs composite film coated on the surface of glassy carbon electrode (GCE). The results show that in 0.2 mol/L NaAc-HAc (pH= 4.5) buffer solution, cryptotanshinone produced a pair of sensitive redox peaks with

Novel tri-dentate ligand-metal complexes [Mn(II), Co(II), Cu(II), Ni(II) and Zn(II) (1-5)] have been synthesized using L-histidine amino acid derived Schiff base ligand and characterized using analytical and spectral methods like UV-visible, FT-IR and ESI-MS techniques. The antioxidant studies of the Schiff base ligand and 1-5 complexes reveal that complexes exhibit significant free radical scavenging

The complexes of organomercury(II) with pyrrolidine-N-thiohydrazide of the type RHg(L)Cl where[R=C6H5 (phenyl), p-ClC6H4 (p-chlorophenyl), p-BrC6H4 (p-bromophenyl), o-, p-HOC6H4, (o-,p-hydroxyphenyl), L = pyrrolidine-N-thiohydrazide, have been synthesized and characterized by elemental analysis, IR,1H-NMR and electronic spectral analysis. Thermogravimetric and differential thermal analytical curves

The present study provides new insight into the structure of potassium hydrogen phthalate 1. The single crystal X-ray structure of 1 consists of a crystallographically independent potassium cation and a unique hydrogen phthalate anion. The µ4-heptadentate binding mode of the unique hydrogen phthalate ligand organizes the K+ ions into a layer resulting in a two-dimensional (2D) coordination polymer

A convenient and cost-effective method is reported for the preparation of gram quantities of an ammonium-rich Mo compound viz. diammonium monomolybdate(VI) (NH4)2MoO4 (1). The process involves a thorough grinding of a commercial sample of ammonium heptamolybdate tetrahydrate (NH4)6[Mo7O24]·4H2O with an excess of ammonium bicarbonate followed by thermal treatment. The facile formation of (1) is confirmed

In the present work we have demonstrated a supramolecular approach for ratiometric luminescence sensing of nitroaromatic explosive compounds (NAEs) by employing a red luminescent Eu(III) complex and a green luminescent Pt(II) complex with in a Triton X-100 surfactant based micellar host in water. The Eu-complex gets entrapped inside micellar core whereas the Pt-C2 remains grafted on the surface of

Three inorganic-organic hybrid nanoclusters of copper and cobalt containing arsenotungstates with lone pair on heteroatom have been synthesized under mild reactions conditions. All the compounds have been characterized by single crystal X-ray diffraction, Fourier transform infrared, UV/visible spectroscopy, thermogravimetric and field emission scanning electron microscopic (FE-SEM) analysis. The compound

New fourteen antimony(III) complexes of general formula [SbLnCl3] (where n= 1 or 2, L =2-aminopyridine, 5-methyl-2-aminopyridine, 2-aminopyrimidine, 4,6-dimethoxy-2-aminopyrimidine, 2-benzyl-2-thiopseudeourea,2-guanidinobenzimidazole, 2-amino-5-thiol-4,6-dimethoxypyrimidine, 2-amino-5-(1H-tetrazol-5-ylthio)-4,6-dimethoxypyrimidine, N-2-pyrimidine, 2-piperidinecarboxamide, N-2-pyrimidine, 2-pyrrolidinecarboxamide

A series of five adducts of m-ethylphenylxanthate of nickel(II) [(m-C2H5C6H4OCS2)2Ni] with nitrogen donors have been synthesized in 1:2 molar ratio by the reaction of aqueous solution of NiCl2.6H2O with aqueous solution of sodium salt of m-ethylphenylxanthate. These metal complexes are reacted with nitrogen donors to give donor stabilized complex, [(m-C2H5C6H4OCS2)2(L)2Ni] where, L= 2-, 3-, 4-ethylpyridine

Binary solvent mixtures of different (%) compositions have been prepared at 303.15 K using tetra alkyl ammonium iodides (R4NI) of 0.02 M to 0.14 M to investigate inter ionic interaction, ion-ion and ion solvent interactions in NMF-DMSO solvent mixture containing large cations of tetra alkyl ammonium iodides (R4NI). The densities (ρ0) of binary solvent mixtures and salt solutions have been measured

In this research, Eu3+ activated and Dy3+-co-doped Y2O3 based phosphors have been synthesized by solid-state reaction method under open atmosphere. The host lattice is composed of 0.25 moles of Sc2O3 which is added to phosphor composition. Thus, Sc3+ substitution of Y3+ ions is implemented to form Y1.40Sc0.50O3 host lattice. The thermal analysis (DTA/TG) have been carried out from 50 °C to 1400 °C

A spectrophotometric method has been studied for the determination of epsilon aminocaproic acid (EACA) through charge transfer (CT) complexation with bromanil (TBBQ). The CT reaction has been carried out at 70 °C of the water bath for 30 min in the borax buffer solution. The spectrum obtained for EACA/TBBQ system shows the maximum absorption band at wavelength of 352 nm. The CT complex is also confirmed

In current work, we present 3,6-di(pyridin-2-yl)-1,2,4,5-s-tetrazine (pytz) capped gold nanoparticles (TzAuNPs) as an potent antibacterial agent against Gram-positive bacteria. The antibacterial properties of TzAuNPs have been studied using Gram-positive Bacillus subtilis (ATCC 11774) by the plate count method and TzAuNPs is found to be highly effective against the strain. Furthermore, TzAuNPs also

A simple laboratory experiment to measure the surface tension of liquids has been proposed in this work, which is well suited for any undergraduate laboratory demonstration. Burette with modified Tate’s law has been found to return surface tension values as good as those obtained using Traube’s stalagmometer. Experimental data and error analysis show similar result accuracy. Also, a comparative study

The Schiff base ligand obtained from the reaction of 2-amino-3-hydroxypyridine, 2,4,6-trihydroxy benzaldehyde is described. Cu(II), Ni(II), Co(II), and Zn(II)complexes have been analyzed by various spectroscopic techniques like FT-IR, UV-visible, mass spectrometry and NMR. Based on spectral data octahedral geometry has been assigned to the complexes. In the present study the prepared Schiff base ligand

The density, sound velocity and viscosity of doxycycline hyclate in water, aqueous solution of L-phenylalanine and aqueous solution of glycyl glycine have been determined at different temperatures (305.15, 310.15, 315.15 and 320.15) K. The calculated values of partial molar volume (V), standard partial molar volume of transfer (Δtr,V), partial molar adiabatic compressibility (κ,s) and partial molar

In this paper, the structural, electronic, non-linear optical (NLO) properties and vibrational frequencies of 4-(methoxycarbonyl)-phenylboronic acid have been examined theoretically using ab initio Hartree-Fock (HF) and Density Functional Theory (DFT/B3LYP) methods applying the standard 6-311++G(d,p) basis set. 1H- and 13C NMR chemical shifts are calculated by employing the direct implementation of

Seven novel lead compounds, acting as NNRTIs of HIV-1, are extracted from a database of, in silico de novo designed, 500 compounds. Functional group based computational molecular modelling techniques are used for such design of Acylthiocarbamate derivatives. Effect of structural characteristics on the antiviral activity of these derivatives has also been studied. Statistical regression techniques namely

Four ionic salts of N, N-disulfodiisopropylammonium cation with complex anionic speciation of metal chlorides such as [FeCl4]-, [NiCl4]2-, [Zn2Cl6]2-/[Zn4Cl10]2-, [CoCl4]2-/[CoCl3]- have been synthesized and characterized with FTIR, NMR, TGA, Raman and electronic spectra. Comparative Brønsted and Lewis acidic strength of the salts have been assessed for catalytic uses in organic reactions via UV-visible

The kinetics of oxidation of L-lysine by diperiodatonickelate(IV) (DPN) in aqueous alkaline medium at a constant ionic strength of 0.60 mol dm-3 has been studied spectrophotometrically. The reaction shows first order in diperiodatonickelate(IV) and less than unit order dependence each in lysine and OH- ion concentrations. The addition of periodate retards the reaction, while the product nickel(II)

Methyl acetate has been synthesized by the reaction between acetic acid and methanol in an experimental batch reactor. The reaction has been carried out homogeneously without using any catalyst and heterogeneously by using Amberlyst 16 resin catalyst. The reaction is performed using different temperatures in the range of 318.15-333.15 K. The reaction catalyzed by Amberlyst 16 is found faster than the

Metal oxide nanoparticles (MONPs) are the most important class of nanoparticles regarding the volume of production and application potential in diversified fields. The research domain of MONPs is vastly expanding and rationally million of bytes are utilized to cover the literature each day around the globe. They can be synthesized in a variety of processes and the MONPs produced through different processes

The viscosities, η and refractive indices, nD of pure acetonitrile, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate and of their binary mixtures with acetonitrile as the common component, covering the entire composition range has been measured at temperatures (298.15, 303.15, 308.15, 313.15 and 318.15) K and atmospheric pressure. Using these experimental data, the deviations in viscosity

In the title compound [Ni(C7H5O2Br)2(H2O)2]H2O, the Ni atom adopts distorted octahedral geometry in which the bidentate ligand acts as O,O’ donor defining an equatorial plane and water molecules occupy the axial positions. It is a mononuclear compound. This compound is crystallized on the monoclinic system, space group P21/c with the unit cell parameters a = 18.4561(8) Å, b = 7.3442(4) Å, c = 14.5786(8)Å

In this paper, using loess particles (LoP), a kind of extremely common and inexpensive natural silicate particles with metastable structure, as inorganic carrier, the petaloid Bi2S3nanowires have been loaded by in-situ depositing, which afforded loess particles loaded petaloid Bi2S3nanowires (PBiNw@LoP) with one-step hydrothermal procedure. Scanning electron microscopy, Fourier transform infrared spectroscopy

Supramolecules mediated porous metal nanostructures are meaningful materials because of their specific properties and wide range of applications. Here, we describe a general and simple strategy for building Au-networks based on the guest-induced 3D assembly of Au nanoparticles (Au-NPs) resulted in host-guest interaction resolved sulfonatocalix[4]arene (pSC4)-modified Au-NPs aggregate. The diverse guest

Breast cancer is the second largest killer disease among women globally. Annually approximately 48,000 women die of breast cancer. Breast cancer patients are at high risk of developing malnutrition from the underlying disease as well as from various drug regimen, chemotherapy and or radiotherapy interventions. As we work for personalized medicine for breast cancer, a personalized nutrition for breast

In this work, sugar-based bis-triazole appended disulfide was synthesized, characterized and the molecular structure is confirmed through different spectral techniques like NMR (1H, 13C), FTIR and mass spectroscopy. Since the target molecule possesses suitable core moiety, we anticipate that the synthesized sugar-based bis-triazole appended disulfide derivative can act as a sensor.

New soluble and insoluble Ta, Mo and Sb pentachloride complex catalysts have been prepared using pyridine and polymer supported cross-linked (poly-4-vinyl pyridine) beads (PSCPVP), respectively. The prepared catalysts are characterized with FTIR, SEM, EDAX, CHN and TGA. The catalytic activities of these catalysts have been examined for esterification of acetic acid with butanol through gas chromatographic

An electrochemically active tin telluride (SnTe) decorated graphene oxide (GO) (SnTe@GO) nanocomposite has been synthesized through simple experimental method and used the same for surface modification of glassy carbon electrode, thus developed a new efficient SnTe@GO/GCE which in turn has been demonstrated as a sensor for identification and quantification of nitrite species in water samples. Common

Solar cells based on lead-free double perovskites as absorber layer is an environment friendly, stable alternative for the conventional lead based hybrid halide perovskites. A comprehensive theoretical study on the optical and electronic properties of all-inorganic double perovskite with A2BB’X6 stoichiometry is done using density functional theory. Doping studies on (RbxCs1-x )2AgBiBr6 perovskite

An efficient and easy template-free method for the preparation of hierarchical porous carbons (HPCs) has been developed using low-priced coal tar pitch (CP) as the starting material. Application of the diketone (-COCO-) radical provides a carbonyl methylene group for polycyclic aromatic hydrocarbons by condensation and produces an effective micro-mesoporous network with a high specific surface area

Knowledge on charge-transfer complexes of drugs is important to understand the drug-receptor binding mechanism. Here, we have been synthesized the organic charge transfer complex of Benzimidazolium picrate (BP) and confirmed its molecular structure and carbon skeleton by 1H and 13C NMR spectral analysis. Asymmetric unit of BP consists of one benzimidazolium cation and a monovalent anion of picric acid

carboxymethyl cellulose (CMC) has been effectively synthesized with high yield and purity. With the prolongation of time after model establishment, the values of Schirmer Ⅰ test (S Ⅰ t) and breakup time of tear film gradually decreased. The α-MSH and CMC alone could ameliorate corneal tissue damage and corneal morphological abnormalities in the dry eye to some extent. However, compared with monotherapy

Taking Rhein as the lead compound, ten esters of rhein were synthesized by esterification. For synthesis of smaller steric hindrance alcohols, SOCl2 was used as a catalyst to synthesize methyl, ethyl and butyl esters. For lager steric hindrance alcohols, dicyclohexyl carbodiimide (DCC) was used as dehydrating agent, and 4-dimethylaminopyridine (DMAP) was used as the catalyst to synthesize isopropyl

Four tetrandrine (TET) derivatives (IVa-IVd) have been synthesized by Suzuki reaction of boronic acid derivatives and 5-bromo-tetrandrine obtained by bromination using tetrandrine as the starting material. The structures are analyzed by 1H NMR, 13C NMR and ESI-MS. The inhibition activities of IVa-IVd against HL60 and A549 cancer cell lines have been investigated by CCK-8 assay. The compounds having

In this work, we have used Stöber method to prepare 200 nm SiO2 particles and then immobilized metal affinity ligand iminodiacetic acid (IDA) and charged them with Ni2+ ions. The particles show high absorption efficiency to bovine hemoglobin and the maximum extraction amounts reached 43.4 mg/g. The particles have been applied to separate a model protein mixture of bovine hemoglobin (BHb) and bovine

In this study, we have focused on preparation, fabrication and characterization of polycaprolactone and beta tricalcium phosphate (PCL/β-TCP) composite scaffolds that are used for bone tissue engineering applications. The electrospun composites have been characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM).

In this study, we have synthesized a composite using carbon material derived from bio-inspired onion peel morphology like 2D trigona carbon nano petals (TCP) incorporated with ferrocene (FC). The FC is added with the purpose of improving the electrochemical behaviour of TCP. Further, to increase the number of electrochemically active sites in the composite, gold nanoparticles (AuNPs) were again decorated

In this study, we investigated mechanisms of photoinduced electron transfer from a conjugated polymer (poly(2-methoxy-5-(2-ethylhexyloxy) 1,4-phenylenevinylene (MEH-PPV) to titanium dioxide (TiO2) nanoparticles (acceptor) through steady-state photoluminescence (PL) spectroscopy. Since mixed phase TiO2 has better photocatalytic compared to single phase, it is an efficient charge separation process during

Nanoparticles of zinc oxide (ZnO NPs) have been synthesised from naturally available Eggplant, Solanum melongena leaf extract. The methodology has been optimized to obtain ZnO NPs which as are characterized using UV-Visible, X-ray diffraction (XRD), Scanning Electron Microscope (SEM) and FT-Infra red (FTIR) tools to confirm their nano dimensions and chemical properties. The SPR band is obtained at

Industrial effluents, particularly from dye industry, is one of the major causes of serious concern as it contaminates the environmental water resources and affect human health. Treatment of such contaminants is a challenging area of interest to researchers. In this context, here, we have explored degradation and mineralization of Direct Blue (DB71) dye in aqueous solution by means of ultrasound irradiation

Core-shell nanomaterials have emerged as a frontier area of focus in materials chemistry and catalysis. Here, we have explored the photocatalyst potential of a double layered core-shell material comprising a rare earth material as core and silica, zinc oxide as the subsequent shell materials. The prepared core-shell has average particle size of 40-60 nm, and the material has been characterized by FTIR

In this study, KHf0.5Te1.5O6 (KHTO) semiconductor has been synthesized by the solid-state method. The synthesized material is characterized using X-ray diffraction, Fourier transform infrared spectroscopy, UV-visible diffuse reflectance spectroscopy, field emission-scanning electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy and N2 adsorption/desorption measurements

The present investigation is based on an in vitro incompatibility study between valsartan and hydrochlorothiazide by spectroscopic and reverse-phase high-pressure liquid chromatography (RP-HPLC) methods. The method has been developed and validated by ultraviolet (UV) spectroscopic method using methanol and water (1:4) as the solvent. The RP-HPLC study has been carried out using acetonitrile, methanol

This work describes the preparation of zinc oxide nanoparticles (ZnO NP) from onion extract through a combination of microwave irradiation and muffle furnace in less than 2 h. Characterization with UV-visible, FTIR, and XRD has confirmed successful formation of nanoparticles. TEM analysis displays the nanoparticles to be spherical shaped with an average size of 6.4 nm. The developed ZnO NP film displays