4-Hy­droxy-2-methyl-3,4-diphenyl­cyclo­pent-2-en-1-one

The asymmetric unit of title compound, C18H16O2, contains two mol­ecules with slightly different conformations. In the first mol­ecule, the two phenyl rings make dihedral angles of 84.98 (11)° and the five-membered ring makes dihedral angles of 84.80 (12) and 73.00 (12)° with the phenyl rings; the corresponding angles for the second mol­ecule are 86.74 (11), 81.20 (13) and 71.36 (12)°. O—H⋯O hydrogen bonds between the hy­droxy and carbonyl groups are a feature of the crystal packing, which results in chains extending parallel to [100]. Weak C—H⋯O and C—H⋯π inter­actions are also observed

2,4-Dinitro-1-naphthol

In the title compound, C10H6N2O5, the two fused rings are almost co-planar, with an r.m.s. deviation of 0.0163 Å. The nitro groups are oriented at dihedral angles of 2.62 (11) and 44.69 (11)° with respect to the plane of the parent fused rings. Intra­molecular O—H⋯O and C—H⋯O hydrogen bonds complete S(6) ring motifs. In the crystal, mol­ecules are linked into chains along [101] by inter­molecular O—H⋯O hydrogen bonds. π–π inter­actions [centroid–centroid distances = 3.6296 (15), 3.8104 (15) and 3.6513 (14) Å] might play a role in stabilizing the structure

2,4-Dibromonaphthalen-1-ol

In the essentially planar (r.m.s. deviation = 0.023 Å) title compound, C10H6Br2O, an intramolecular O—H...Br hydrogen bond generates an S(5) ring. In the crystal, molecules are linked by an ...O—H...O—H...O— C(2) chain extending along [100], which involves the same H atom that participates in the intramolecular hydrogen bond. Aromatic π–π interactions [centroid–centroid separation = 3.737 (4) Å] help to consolidate the packing

Article Evaluation of Silica-H2SO4 as an Efficient Heterogeneous Catalyst for the Synthesis of Chalcones

molecule

Green Synthesis and Investigation of Surface Effects of α-Fe2O3@TiO2 Nanocomposites by Impedance Spectroscopy

Nanocomposites based on iron oxide/titanium oxide nanoparticles were prepared by employing green synthesis, which involved phytochemical-mediated reduction using ginger extract. XRD confirmed the composite formation, while scanning electron microscopy (SEM), dynamic light scattering (DLS), and energy-dispersive X-ray spectroscopy (EDX) was employed to investigate the particle size, particle morphology, and elemental analysis. SEM indicated the formation of particles with non-uniform shape and size distribution, while EDX confirmed the presence of Fe, Ti and oxygen in their elemental state. The surface effects were investigated by Fourier transform infrared radiation (FTIR) and impedance spectroscopy (IS) at room temperature. IS confirmed the co-existence of grains and grain boundaries. Thus, FTIR and IS analysis helped establish a correlation between enhanced surface activity and the synthesis route adopted. It was established that the surface activity was sensitive to the synthesis route adopted. The sample density, variation in grain size, and electrical resistivity were linked with surface defects, and these defects were related to temperature. The disorder and defects created trap centers at the sample’s surface, leading to adsorption of CO2 from the environment