摘要:
Aminonitrobenzodifuroxan (CL-18) is prepared by directly converting pentanitroaniline to aminonitrobenzodifuroxan with heat in the presence of an excess of sodium azide. The pentanitroaniline is prepared in high yield from 3,5-dinitroaniline with a mixture of nitric acid and sulfuric acid in which the final sulfuric acid concentration is from 99.0 to 99.5%.
摘要:
A benzo-fused-heterocyclic elongated dye having a superior molecular hyperpolarizability and yet having an acceptably-low optical absorbance of light near 1550 nm in wavelength, which is an important optical communication band for telecommunication applications.
摘要:
An optical waveguide subsystem, and process, having at least one cladding in contact with at least one core. The cladding has a refractive index less than the refractive index of the core. Either the cladding or core contains a crosslinked polyimide that is substantially meta-linked. The polyimide has an absolute birefringence of from about 0.01 to about zero.
摘要:
Processible chromophoric polymers having nonlinear optical properties and wherein the chromophore is present in and is a part of the polymer backbone, including substantially all of the monomer or repeat units, with the dipole moments pointing in the same direction (head-to-tail) along the polymer backbone. Such polymers include phenylene, phenylene vinylene, stilbenylene, phenyl piperdine, and coumarin polymers.
摘要:
A new polynitro compound pentanitrophenyl azide is disclosed, and a method of preparation is disclosed wherein hexanitrobenzene is reacted with sodium azide. This new polynitro compound is useful as an explosive.
摘要:
A benzo-fused-heterocyclic elongated dye having a superior molecular hyperpolarizability and yet having an acceptably-low optical absorbance of light near 1550 nm in wavelength, which is an important optical communication band for telecommunication applications.
摘要:
A polyimide is disclosed of the formula: CG1 and CG2 are independently electron-accepting and/or electron-donating groups; x is an integer from about 3 to about 3000; ODAH is any of a number of known dianhydride residues; ODAM is any of a number of known diamine residues; and m, n, o, and p cumulatively add to 1.0, with the sum of m and n ranging from about 0.05 to about 1.0, the sum of o and p ranging from about 0 to about 0.95, the sum of m and o being about 0.5 and the sum of n and p being about 0.5. In addition, a film structure comprising the polyimide and devices utilizing the film structure are disclosed.
摘要:
Second-order nonlinear optical polymeric films, including alternating monlecular layers of two head-to-head, mainchain, amphophilic, chromophoric polymers, one polymer having the electron donating end of the chromophore attached to hydrophilic groups, and the other polymer having the electron donating end of the chromophore attached to hydrophobic groups, and methods of fabricating the films for use in optonics.