Highly sensitive and selective uric acid sensor was fabricated using facile wet-chemically prepared ternary doped ZnO/Ag<sub>2</sub>O/Co<sub>3</sub>O<sub>4</sub>nanoparticles onto glassy carbon electrode by electrochemical approach, which introduced a prospective and reliable route to the future development of enzyme-free sensor by doped nanomaterials in broad scales.
Herein, the micellization phenomena of an amphiphilic antidepressant drug nortriptyline hydrochloride (NOT) have been studied using tensiometric technique in the absence and presence of different concentration of inorganic salts (NaCl, NaBr and KCl) at 298.15 K. NOT is employed for the relief of symptoms of depression. In presence of inorganic salt the CMC value decreases which is explained on the basis of nature and ion size. Various parameters, i.e., the maximum surface excess concentration at the air/solution interface (Γmax), minimum area per head group at the air/solution interface (Amin), free energy of micellization (ΔG m o), minimum energy of surface (G min) and standard Gibbs energy of adsorption (ΔG ads o) were evaluated and discussed in detail.
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.
A highly sensitive sensor based on ZnO@SiO<sub>2</sub>nanospheres has been developed for the detection of ascorbic acid. The developed sensor is very simple and has been fabricated using low cost materials.
Thermodynamic, surface and micellar properties of anti-inflammatory drug sodium 2-(4-isobutylphenyl) propionate (sodium salt of ibuprofen (NaIBF)) in aqueous/urea solution were studied by surface tension measurements at 298.15 K in the presence of anionic surfactant sodium dodecylsulfate (SDS). Critical micelle concentration (cmc), surface tension at cmc (γcmc), maximum Gibbs surface excess (Γmax), minimum surface area per surfactant molecule at the air/water interface (A min) etc. were determined in pure water as well as in aqueous urea solution. The theories of Clint, Rosen and Rubingh have been applied to describe the interactions between these amphiphiles at the interface and in the micellar solution. Various thermodynamic parameters have been calculated and discussed in detail.
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.
In our study, three gemini dicationic surfactants with different methylene group spacer (16-6-16, 16-5-16 and 16-4-16) have been synthesized and characterized in solution by <sup>1</sup>H NMR spectroscopic technique. The implications of gemini micellar solution on ninhydrin and metal amino acid complex ([Cu(II)-Trp]<sup>+</sup>) were performed by the means of single-beam UV-visible spectroscopy. The absorbance was noted at regular time intervals and values of rate constant (<i>k<sub>ψ</sub></i> ) were determined by using a computer-based program. Synthesized surfactants proved as an efficient catalyst on the interaction of ninhydrin with metal amino acid complex as compared with conventional surfactant and aqueous systems. The required description regarding the implications of gemini dicationic surfactants are provided in the text in detail. The conductivity technique was applied in order to get critical micelle concentration (cmc) of geminis in the presence and absence of reactants. Catalytic results developed in gemini dicationic surfactant system were explained effectively by pseudo-phase model. Various thermodynamic quantities, <i>viz</i>., activation energy, <i>E</i> <sub>a</sub>, activation enthalpy, Δ<i>H</i> <sup>#</sup>, and activation entropy, Δ<i>S</i> <sup>#</sup>, were obtained on interaction of ninhydrin with [Cu(II)-Trp]<sup>+</sup> in gemini systems by applying Eyring equation. A detailed explanation about these evaluated parameters was also made.
In the title compound, C(20)H(18)N(2)O(2), weak inter-molecular C-H⋯O and C-H⋯N inter-actions generate a chain that runs parallel to the b axis and incorporates C(7) and R(2) (2)(15) graph-set motifs. The supra-molecular aggregation is completed by the presence of weak C-H⋯π inter-actions.
