N-(Naphthalen-1-yl)benzamide

In the title compound, C17H13NO, the N—H and C=O bonds are anti with respect to each other. The dihedral angle between the naphthalene ring system and the phenyl ring is 86.63 (5)°. In the crystal, N—H⋯O hydrogen bonds link mol­ecules into chains along [010]

1,2-Dimeth­oxy-3-[(E)-2-nitro­ethen­yl]benzene

The title compound, C10H11NO4, was synthesized via condensation of 2,3-dimeth­oxy­benzaldehyde with nitro­methane using microwave irradiation without solvent. The H atoms of the –CH=CH– group are in a trans configuration. The dihedral angle between the mean planes of the benzene ring and the nitro­alkenyl group is 23.90 (6)°

Theoretical study of small signal modulation behavior of Fabry-Perot Germanium-on-Silicon lasers

This work investigated the small signal performance of Fabry-Perot Ge-on-Si lasers by modeling and simulations. The 3dB bandwidth dependence on the structure parameters such as poly-Si cladding thickness, Ge cavity width and thickness, and minority carrier lifetime were studied. A 3dB bandwidth of 33.94 GHz at a biasing current of 270.5 mA is predicted after Ge laser structure optimization with a defect limited carrier lifetime of 1 ns

2,2′,7,7′-Tetra­bromo-9,9′-spiro­bifluorene toluene hemisolvate

There are two independent mol­ecules and one toluene solvent mol­ecule in the asymmetric unit of the title compound, C25H12Br4·0.5C7H8. The dihedral angles between the fluorene ring systems are 85.30 (6) and 84.95 (6)° in the two mol­ecules. The disortions in angles from the ideal sp 3-hybridization geometry around the tetra­hedral C atoms are due to the strain imposed by the central five-membered ring and steric effects

N-(1-Naphth­yl)benzene­sulfonamide

In the title compound, C16H13NO2S, the C—SO2—NH—C torsion angle is −70.1 (2)°. The dihedral angle between the planes of the naphthyl ring system and the phenyl ring is 34.67 (4)°. In the crystal, mol­ecules are linked by inter­molecular N—H⋯O hydrogen bonds into chains along [100]. There are also π–π inter­actions between adjacent naphthyl groups [inter­planar spacing = 3.541 (3) Å] for mol­ecules stacked along [100]

N-(4-Chloro­benzyl­idene)-1-naphthyl­amine

The title compound, C17H12ClN, represents a trans isomer with respect to the C=N bond; the dihedral angle between the planes of the naphthyl and benzene groups is 66.53 (5)°

3,5-Dinitro-N-(4-nitro­phen­yl)benzamide

In the title mol­ecule, C13H8N4O7, the amide fragment has an anti configuration. The mean planes of the two benzene rings form a dihedral angle of 7.78 (4)°. The mean planes of the three nitro groups are twisted by 6.82 (3), 5.01 (4) and 18.94 (7)° with respect to the benzene rings to which they are attached. In the crystal, mol­ecules are linked by weak inter­molecular N—H⋯O hydrogen bonds into chains along [100]

1-(2,3-Dimeth­oxy­benzyl­idene)-2-(2,4-dinitro­phen­yl)hydrazine

In the title compound, C15H14N4O6, the dihedral angle between the aromatic rings is 3.7 (4)°. The nitro groups make dihedral angles of 6.0 (4) and 5.2 (4)° with the parent ring and are oriented at 6.0 (6)° with respect to each other. The meth­oxy groups are inclined at 54.0 (2) and 2.5 (3)° with respect to the benzene ring to which they are attached. In the crystal, mol­ecules are linked by weak C—H⋯O inter­actions. The mol­ecular conformation is consolidated by an intra­molecular N—H⋯O hydrogen bond