Synthesis, structural characterization, electrical properties and antioxidant activity of [p-(NH3)C6H4NH3]3P6O18·6H2O

Design, synthesis, crystal structure and luminescent properties of a new tantalum-phosphate K3BiTaP3O13 with negligible concentration quenching and good thermostability

This work reports a new host template, K₃BiTaP₃O₁₃, for both Eu³⁺ and Tb³⁺ luminescence, providing a ‘dimensional obstacle’ to suppress negative concentration quenching with a high density of Eu³⁺ or Tb³⁺.

Molecular structure, spectroscopic, dielectric and thermal study, nonlinear optical properties, natural bond orbital, HOMO-LUMO and molecular docking analysis of (C6Cl2O4) (C10H14N2F)2·2H2O

A new chloranilate compound with 1-(2-fluorophenyl)piperazine has been synthesized and characterized using spectroscopic methods and X-ray diffraction. The atomic arrangement can be described by an H-bonded 3D network, formed by anionic entities, organic cations and H₂O molecules linked together via NH…O, OH…Cl, CH…Cl and CH…O hydrogen bonds. The vibrational absorption bands of the various characteristic groups of this compound have been identified by infrared spectroscopy. Moreover, the thermal and dielectric analyses have shown that the title compound has a phase transition at 393 K. The surface mapped over the d_norm property, highlights the A⋯H (AO, C, Cl and F) as the main intermolecular contacts. On the other hand, the geometry, intermolecular bonds and harmonic vibrational frequencies of the title molecule have been investigated using the B3LYP/6-31G (d, p) method. The stability of the structure obtained, as well as the charge transfer within the molecule, have been confirmed by determining the energies of the HOMO and LUMO levels and the theoretical gap energy. Molecular docking studies of the title compound have also been conducted as part of this study.

New Organic Acidic Cyclohexaphosphate: Synthesis, Crystal Structure, Physicochemical Study, and In Vitro Biochemical Investigation

A novel organic cyclohexaphosphate [o-(OCH3)C6H4NH3]4H2P6O18·4H2O (1) has been synthesised by the slow evaporation method. An X-ray diffraction study on a single crystal was used to identify this compound. It shows that this acidic cyclohexaphosphate crystallizes in the monoclinic space group P21/n with V 2215.1(1) Å3 and Z 2. Its crystal structure is a packing of alternating inorganic and organic layers parallel to the (a, c) planes. Crystal symmetry is confirmed by 31P magic angle spinning-NMR spectroscopy. Furthermore, spectroscopic (IR, UV-visible) and thermal (thermogravimetric/differential thermal analysis and differential scanning calorimetry) characteristics are given. The excitation and emission spectra were recorded showing blue photoluminescence. The alternating current conductivity and dielectric measurements were carried out in the temperature range 333–403 K and the frequency range from 5 Hz to 13 MHz. The impedance data were well fitted to an equivalent electrical circuit. The temperature dependence of the direct current conductivity follows the Arrhenius law and the frequency dependence of σAC(ω,T) follows Jonscher’s universal law. Antioxidant properties of this compound were studied, in vitro, at various concentrations with different tests; 1,1-diphenyl-2-picrylhydrazyl, hydroxyl scavenging ability, ferric reducing power, and ferrous ion chelating ability, using ascorbic acid as control.

Synthesis, Crystal Structure, Hirshfeld Surface Analysis, and Physicochemical Study of an Anhydrous Organic Acidic Cyclohexaphosphate

The new organic-inorganic hybrid [5-Cl-2-(CH₃)C₆H₃NH₃]₄H₂P₆O₁₈ has been synthesized by the slow evaporation method. X-ray diffraction on a single crystal shows that this acidic cyclohexaphosphate crystallized in the monoclinic space group C _2/c with a = 33.89(11) Å, b = 9.16(16) Å, c = 13.68(3) Å, β = 91.35(2)°, V = 4244.9(19) ų and Z = 4. ³¹P MAS-NMR and ¹³C CP/MAS-NMR results are in accordance with X-ray findings. Fluorescent study shows the blue photoluminescence. Furthermore, FT-IR analysis was studied and the complete vibrational assignments were done. Intermolecular interactions were analyzed using Hirshfeld surface analysis and the associated 2D fingerprint plots.