Synthesis and characterization of γ-Fe₂O₃/polyaniline-curcumin composites

616-622Superparamagnetic nanomaterials are showing great prospects in medical treatment with targeted medicine. A new conductive superparamagnetic nanocomposite, γ-Fe2O3/polyaniline-curcumin (γ-Fe2O3/PANI-curcumin), has been synthesized using the interaction between amino group in polyaniline and ketone group in curcumin. The γ-Fe2O3/PANI-curcumin composite has the superparamagnetism (30 emu·g-1) and electrochemical activity based on the results of magnetization curve and cyclic voltammetry (CV). Transmission electron microscope (TEM) shows that the particle size of γ-Fe2O3/PANI-curcumin is about 50 nm. Fourier transform infrared spectra (FTIR) and X-ray diffraction (XRD) have been used to characterize the γ-Fe2O3/PANI-curcumin composite and to confirm that curcumin is immobilized into γ-Fe2O3/PANI chains. The study provides an academic foundation for developing some new material for immobilizing drugs of anticancer

Preparation and Characteristics of γ-Fe2O3/Polyaniline-Curcumin Composites

Superparamagnetic nanomaterials are showing great prospects in medical treatments with targeting medicines. A new conductive superparamagnetic nanocomposite, γ-Fe2O3/polyaniline-curcumin (γ-Fe2O3/PANI-curcumin), was prepared by using the interaction between an amino group in polyaniline and a ketone group in curcumin. The γ-Fe2O3/PANI-curcumin nanocomposite showed superparamagnetism (30 emu·g−1) and electrochemical activity, based on the results of magnetization curve and cyclic voltammetry (CV). Transmission electron microscope (TEM) indicated that the particle size of γ-Fe2O3/PANI-curcumin was between 10 and 50 nm. Fourier transform infrared spectra (FT-IR) and X-ray diffraction (XRD) were used to characterize the γ-Fe2O3/PANI-curcumin nanocomposite, confirming that curcumin was immobilized into the γ-Fe2O3/PANI chain. This study provided an academic foundation for developing a new material for immobilizing an anticancer drug

Effects of Carboxylates on the Performance of Zn Electrode

Zinc is widely used as a negative electrode material for batteries due to its excellent electrochemical properties. Zinc is prone to corrosion and the formation of zinc dendrites cause short circuits of the battery, which leads to reduced battery capacity and shortens the battery’s life, hindering its use in weak acidic electrolytes (for example, aqueous Zn-polyaniline batteries). The effects of carboxylates (sodium formate, sodium acetate, sodium propionate, sodium butyrate, sodium valerate, disodium malonate, and disodium succinate) and their concentrations on zinc electrode performance were studied with electrochemical methods to improve the zinc electrode activity for long-life Zn-polyaniline batteries. It was found that the ability of inhibiting corrosion of the zinc electrode is better in the aqueous electrolyte containing 0.2 M disodium malonate. The charge/discharge performance of a Zn-polyaniline battery electrodeposited with polyaniline on a carbon substrate is carried out in the aqueous electrolyte. the results show that the initial discharge specific capacity of the polyaniline in the Zn-polyaniline battery is as high as 131.1 mAh·g−1, and maintains a discharge specific capacity of 114.8 mAh·g−1 and a coulombic efficiency over 92% after 100 cycles at a charge/discharge current density of 1 A·g−1 in the voltage range of 1.5–0.7 V

Synthesis and characterization of γ-Fe2O3/polyaniline-curcumin composites

Superparamagnetic nanomaterials are showing great prospects in medical treatment with targeted medicine. A new conductive superparamagnetic nanocomposite, γ-Fe2O3/polyaniline-curcumin (γ-Fe2O3/PANI-curcumin), has been synthesized using the interaction between amino group in polyaniline and ketone group in curcumin. The γ-Fe2O3/PANI-curcumin composite has the superparamagnetism (30 emu·g-1) and electrochemical activity based on the results of magnetization curve and cyclic voltammetry (CV). Transmission electron microscope (TEM) shows that the particle size of γ-Fe2O3/PANI-curcumin is about 50 nm. Fourier transform infrared spectra (FTIR) and X-ray diffraction (XRD) have been used to characterize the γ-Fe2O3/PANI-curcumin composite and to confirm that curcumin is immobilized into γ-Fe2O3/PANI chains. The study provides an academic foundation for developing some new material for immobilizing drugs of anticancer

<span style="font-size:11.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;color:black;mso-ansi-language:EN-GB;mso-fareast-language:EN-US; mso-bidi-language:HI" lang="EN-GB">Synthesis and characterization of functional superparamagnetic nanocomposites containing γ-Fe₂O₃, dexamethasone sodium phosphate and polyaniline</span>

207-213Superparamagnetic nanomaterials are showing great prospects in medical treatment with targeted medicine. A conceptually new method has been developed for the synthesis of a superparamagnetic nanocomposite, γ-Fe2O3/PANI-DSP (γ-Fe2O3/PANI doped with dexamethasone sodium phosphate). The properties of γ-Fe2O3/PANI-DSP are tested using FTIR, UV-vis, energy dispersive X-ray, vibrating sample magnetometer, transmission electron microscopy and cyclic voltammetry. The results show that the electric conductivity of γ-Fe2O3/PANI-DSP is as high as 0.11 S cm-1, while the saturated magnetizations of γ-Fe2O3/PANI-DSP (11.3 emu g-1) decreases in comparison with γ-Fe2O3/PANI (29.1 emu g-1). The morphology of γ-Fe2O3/PANI-DSP appears as spherical particles with a diameter of approximately 50 nm, which indicates that γ-Fe2O3/PANI-DSP would be highly favored in the chemotherapy of a variety of cancers

Electrochemical Ploymerization of Aniline in the Alkaline Solution and Properties of Polymer

苯胺在碱性溶液中电化学氧化时，阳极上形成深黄色的聚苯胺，其氧化峰电位为０．７Ｖ（ｖｓ．Ａｇ／ＡｇＣｌ含饱和ＫＣｌ溶液），比在酸性溶液中氧化约低０．３Ｖ。环一盘电极实验结果表明，在碱性溶液中，苯胺氧化时生成两种可溶性的中间物。形成的聚合物颜色不随电位和ｐＨ值而变化。在空气和碱性溶液中具有很高的稳定性，在紫外－可见光谱图上，聚合物的吸收峰出现在５００ｎｍ左右。A deep yellow polyaniline was formed at the anodic electrode during electrochemical oxidation of aniline in the alkaline solution.The peak of oxidation potential for aniline in the alkaline solution was 0. 7 V (vs.Ag/AgCl with a saturated KCl solution),which is about 0. 3V less than that in the acidic solution.The results from rotating ring-disk electrode experiment show that two soluble intermediates were generated during electrochemical oxidation of aniline.The colour of the polymer in the alkaline solution is independent of applied potential and pH values.An adsorption peak was observed in the UV region at 500 nm for the polymer.The polymer has a high stability in air and the alkaline solution.作者联系地址：扬州大学师范学院化学系Author's Address: Department of Chemistry, Teacher's College, Yangzhou University,Yangzhou,22500