Facile synthesis of single-crystal of o-phenylene diamine dihydrochloride as a polychloride and fabrication of high-performance semiconductor thin film

Single crystals of organic compounds are perfectly suitable for top organic field-effect transistors (OFETs) because of their arranged atomic pressing and smooth surface. Crystals of o-phenylenediamine dihydrochloride polychloride, C H (NH ) ·2HCl ([OPDDH] ) is magnificently synthesized in a highly acidic medium; crystal structure is determined as monoclinic, space group C2/c, with a = 7.324(2), b = 14.497 (5), c = 7.992(3)Å, α = 90, β = 94.04(4) and γ = 90 ( ), V = 846.4(5) Å and Z = 4. The different interactions in the crystal were investigated by Hirshfeld surface analysis. The geometry, highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO) and other active parameters were calculated by density functional theory (DFT) on Material Studio 7.0. Thin film of single crystal was fabricated by spin coating method. The single crystal and its thin film were described by various techniques including UV–Vis–NIR, and single & powder X-ray diffraction. The refractive parameter dispersion and dielectric constants of thin film have been examined by Wemple–DiDomenico and single Sellmeier oscillator models. The optical parameters indicate that the thin film has a comparatively high absorption zone within 2–6 eV of photon energy range. The activation energies (E ) and Urbach energy (E ) values of thin film were found to be 2.01 and 0.378 eV, respectively. The resulting thin film is high performance semiconductor. This bring it to be a good candidate as a solar cell application based on its dispersion parameters and band gap value. 6 4 2 2 a U c o

Fabrication and Characterization of Microcellular Polyurethane Sisal Biocomposites

In this study, microcellular polyurethane (PU)-natural fiber (NF) biocomposites were fabricated. Polyurethanes based on castor oil and PMDI were synthesized with varying volume ratios of sisal fiber. The effect of natural fiber treatment using water and alkaline solution (1.5% NaOH) and load effect were investigated. Biocomposites were mechanically and physically investigated using tensile, viscoelasticity, and water absorption tests. The interfacial adhesion between PU and sisal fiber was studied using SEM. Short NF loads (3%) showed a significant improvement in the mechanical properties of the PU-sisal composite such as modulus of elasticity, yield and tensile strength up to 133%, 14.35 % and 36.7% respectively. Viscoelastic measurements showed that the composites exhibit an elastic trend as the real compliance (J’) values were higher than those of the imaginary compliance (J’’). Increasing NF loads resulted in a decrease of J’. Applying variable temperatures (120–80 °C) caused an increase in the stiffness at different frequencies