Spray Deposition and Characterization of p-type Li doped NiO Thin Films

Undoped and lithium doped nickel oxide (Li doped NiO) thin films have been prepared onto glass substrates at 450 °C by chemical spray pyrolysis technique. The effect of lithium (Li) concentrations on the structural, optical, photoluminescence and electrical properties of the Li doped NiO films were studied by X-ray diffraction (XRD), UV-vis- NIR spectrophotometer, Photoluminescence (PL) spectrophotometer, Hot probe and Hall effect measurement system. The PL results confirmed that the band gap reduces when the lithium concentration increases. The structural properties of undoped and Li doped NiO films showed polycrystalline cubic structure. The optical transmittance and band gap values of the films decreases, while the absorption values increases with the increase in Li concentration. Moreover, it has been observed that the resistivity of the above films decreases with the increase in Li concentration

Diethyl 3,4-bis­(2,5-dimethoxy­benz­yl)thieno[2,3-b]thio­phene-2,5-di­car­boxylate

In the title compound, C30H32O8S2, the dihedral angle between the two benzene rings is 18.8 (1)°. The mol­ecular structure is stabilized by weak intra­molecular C—H⋯O hydrogen bonds. In the crystal structure, the mol­ecules are linked via weak inter­molecular C—H⋯O hydrogen bonds and π–π inter­actions between two benzene rings [centroid–centroid distance = 3.672 (1) Å]

N-[(3-Phenyl­sulfanyl-1-phenyl­sulfonyl-1H-indol-2-yl)meth­yl]propionamide

In the title compound, C24H22N2O3S2, the phenyl rings form dihedral angles of 75.2 (1) and 86.1 (1)° with the indole ring system. The mol­ecular structure is stabilized by intra­molecular C–H⋯O and N—H⋯O hydrogen bonds. The crystal structure exhibit inter­molecular N—H⋯O and C—H⋯O hydrogen bonds, C—H⋯π and π–π [centroid–centroid distance = 3.748 (1) Å] inter­actions

Raman study of temperature dependence of lattice modes in calcite

The temperature dependence of the line width and the peak position of the Eg librational mode (of nominal frequency 285 cm−1) and the Eg translational mode (of nominal frequency 155 cm−1) in calcite (CaCO3) have been studied by laser-Raman spectrometry. The role of orientational relaxation as a possible process contributing to the line width has been evaluated. It is concluded that reorientations do not play a major part in relation to the present observations. It is further shown that the latter can be understood on the basis of cubic and quartic anharmonic processes. The data also suggest that certain phonon interactions earlier considered insignificant for peak shift in calcite, do contribute significantly

3-(4-Methoxy­benz­yl)-1-benzothio­phene

In the title compound, C16H14OS, the dihedral angle between the benzothio­phene ring system and the benzene ring is 72.41 (12)°. A weak inter­molecular C—H⋯π inter­action from the benzene ring to the benzothio­phene ring system is observed in the crystal structure