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In the title compound, C 27 H 21 N 3 O 3 , the cyclohexa-1,3-diene ring has a screw-boat conformation, and the fused ring system is folded, the dihedral angle between the outer benzene rings being 27.61 (6)°. The N -acetylacetamide residue (r.m.s. deviation = 0.0935 Å) has an anti conformation and is essentially perpendicular to the benzene ring to which it is connected [dihedral angle = 89.14 (6)°]; the methoxybenzene group is also twisted out of this ring [dihedral angle = 59.47 (7)°]. The three-dimensional architecture is consolidated by C—H...O and C—H...π interactions.
In this methodology, the thiourea (TU) sensor was made-up by means of glassy carbon electrode (GCE) layered by the wet-chemically prepared binary SnO2/V2O5 nanomaterials (NMs). The existence of SnO2 and V2O5 in prepared spherical NPs were categorized by X-ray photoelectron spectroscopy (XPS), Field Emission Scanning Electron Microscopy (FESEM), Energy-dispersive X-ray spectroscopy and X-ray Powder Diffraction (XRD). The TU sensor was displayed the linear responses in concentration range (LDR) of 0.1 nM ~ 0.01 mM. The calibration curve of TU sensor was made by plotting current verses concentration of TU, which was measured by electrochemical technique. The sensitivity and lower limit of detection (DL) for TU sensor were calculated from calibration curve, which are found as 17.0918 µAµM-1cm−2 and 95.40 ± 4.77 pM respectively. The analytical parameters of TU sensor such as reproducibility, response time and stability were measured and found efficient results. It also was validated in the detection of TU in presence of real bio-samples. Thus, this unique and prospective method is introduced to develop the selective biosensor by electrochemical approach, which might be a pioneer sensor probe for its simple and reliable approach for the safety of healthcare and biomedical fields in a large scales.
Diolefinic antibacterial laser dye namely 1,4-Bis[2-(4-Pyridyl) Vinyl] Benzene (4PVB)have been investigated electrochemically using cyclic voltammetry, chronoamperometry, convolution and deconvolution voltammetry combined with digital simulation techniques at a platinum electrode in 0.1 mol / L Tetra Butyl Ammonium Perchlorate (TBAP) in solvent 1,2-dichloroethane. The diolefinic species were reduced by consuming two sequential electrons to form radical anion and dianion. The second electron transfer was followed by chemical step i.e the electrode reaction proceed as EEC scheme. In scanning the potential to positive direction, the diolefinic laser dye compound was oxidized by loss of one electron, which was followed by a fast chemical process ( isomerization or association). The pathway of electrode reaction and the electrochemical parameters of the investigated compound were discussed & determined using cyclic voltammetry and chronoamperometry techniques. The extracted electrochemical parameters were verified and confirmed via digital simulation and convolutive voltammetry methods.
Abstract: The title compound 2-[(3,5-dimethyl-1-phenyl-1 H -pyrazol-4-yl)methylene]-indane-1,3-dione ( 3) was synthesized in high yield by reaction of 3,5-dimethyl-1-phenyl-pyrazole-4-carbaldehyde and indane-1,3-dione in ethanol in the presence of pyridine. The structure of this new compound was confirmed by elemental analysis, IR, 1 H NMR, 13 C NMR and GC-MS spectral analysis. Keywords: Knoevenagel condensation; indane-1,3-dione; pyridine Naturally occurring as well as synthetic pyrazole-containing heterocyclic compounds have great importance for their biological activities such as anti-bacterial [1], anti-inflammatory [2], anti-hypertensive [3], anti-cancer [4], and anti-amoebic activity [5]. Pyrazole-containing donor-acceptor chromophores are also applicable in materials fields for their properties such as non-linear optical (NLO), optical limiting [6], electrochemical sensing [7] and langmuir film [8]. Due to the wide application of pyrazoles we decided to synthesize a new pyrazole-containing donor-acceptor chromophore by Knoevenagel condensation in analogy to a previously published procedure [9].
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Abstract In this study, we reported electrochemical synthesis of conductive polypyrrole‐chitosan (PPY‐CHI) thin film for sensitive detection of sulfite in real samples. The synthesized PPY‐CHI film was characterized in terms of surface morphology, optical property, binding energy, conductivity and electrochemical properties. The synthesized copolymeric PPY‐CHI film displayed good electrocatalytic behaviour towards oxidation of sulfite. The synthesized PPY‐CHI film was used for sulfite detection using differential pulse voltammetric technique with detection limit, sensitivity and linearity of 0.21 μM (S/N=3), 15.28 μA μM cm −2 and 50–1100 μM respectively. In addition, the current responses of PPY‐CHI film towards sulfite were repeatable, reproducible response and unaffected by selected electroactive interferents. Finally, the synthesized PPY‐CHI was successfully and satisfactorily applied for determination of sulfite in real food and biological samples. The results obtained from this study highly placed PPY‐CHI film as a promising sensor for sensitive and accurate detection of sulfite in food and biological samples for human health protection.
