Search

In this article, we present the structural and magnetic studies of pristine SmFeO3 nanocrystalline ceramic samples as sintered at temperature 850 °C and 1000 °C. X-ray powder diffraction data confirm the existence of single-phase nature with orthorhombic (Pbnm) structure of the samples. The SEM image reveals spherical particles with a size range of 60–130 nm for SFO-850 and SFO-1000 samples. X-ray absorption spectroscopy studies on Fe L3,2 and O K-edges of SmFeO3 sample revealed the homo-valence state of Fe in these materials. From magnetization studies it has been observed the materials exhibit ferromagnetic and antiferromagnetic (canted spin structure) sub-lattices, which results strong magnetic anisotropy in the system.

A novel soluble alternating conjugated copolymer, comprised of 3-dodecyloxythiophene and pyridine moieties, was synthesized via the Heck Couple approach. Regioregular poly(3-dodecyloxythiophenel) synthesized by McCullough was also studied for comparison. The obtained polymers were characterized by 1H NMR, HR-MS, gel permeation chromatography, UV–Vis spectroscopy, photoluminescence and Cyclic voltammetry. The photoluminescence of the copolymer exhibited extraordinary bright blue. The electrochemical study shows that the new alternating copolymer does not merely have the properties of the two units that constitute it but has mutual hole and electron charge carrier properties which might be promising material for applications in high efficiency, single or low number layers functional devices.

Isophorone diisocyanate (IPDI) is an alicyclic isocyanate, in which the outcomes always possess good light and heat stability. A novel IPDI terpolymer composite were synthesized and characterized using Fourier transform infrared (FTIR), Nuclear magnetic resonance (NMR), gas permeation chromatography (GPC), and the chemical analysis method. The result showed that IPDI terpolymer composite could be prepared in the presence of Cat-5 catalyst and under the reaction temperature between 70 ∼ 90°C. The colorless or pale yellow liquid products without solvent could be obtained in a short time under optimized reaction conditions. In addition, the IPDI trimer/monomer mixture having an NCO content ranging from 25.0% to 28.0% and average nominal functionality of from 2.5 to 2.8 could be compatible with sufficient reactivity and liquidity.