Biomimetic growth, dielectric and magnetic features of copper ascorbate dihydrate crystals

• Published in: Journal of solid state chemistry 2019-09, Vol.277, p.538-547
• Main Authors: Jumanath, E.C., Pradyumnan, P.P.
• Format: Article
• Language: English
• Subjects: Copper ascorbate dihydrate; Crystal growth; Dielectrics; Spectroscopy; X-ray diffraction
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2019.07.001

Mineral ascorbates are the salts of ascorbic acid, and they are formed by bonding of mineral cation to ascorbate anion. Ascorbate salts may better tolerated by the human body than the corresponding weak acidic ascorbic acid. In this work, we depicted the methodology employed to synthesize single crystals of a new salt of ascorbic acid using copper chloride. The crystal structure was initially studied by X-ray diffraction, and further characterizations, such as spectroscopic studies (Fourier Transform Infra-Red and Micro Raman and thermal analysis (Differential Scanning Calorimetry and Thermogravimetry) were also carried out. The optical band gap of the material is determined by UV–visible spectroscopy. The polarization mechanism of the compound is explored using the dielectric measurements. Dielectric constant, a.c. conductivity and loss tangent were measured over a frequency range from 100 Hz to 5 MHz. The magnetic moment variation of magnetic field at room temperature shows a narrow magnetic hysteresis loop which indicates the weak ferromagnetic behaviour of the copper ascorbate crystal matrix. [Display omitted] •Growth of copper ascorbate dihydrate single crystals by gel method.•The chemical formula of the grown crystal is (Cu(C6H6O6)·2H2O).•The polarization mechanism of the compound was explored using the dielectric measurement.•Narrow magnetic hysteresis loop indicate weak ferromagnetism of copper adipate dihydrate.