Bobovich, Ya. S. published the artcileStimulated Raman spectra of molecular crystals, Application of Bis(4-nitrophenyl)amine, the publication is Zhurnal Prikladnoi Spektroskopii (1969), 11(4), 662-9, database is CAplus.
Stimulated Raman spectra were obtained of 21 powd. compounds (at 77 and 300°K; some also at liquid He temperature) as well as of C6H6 and its mono- and disubstituted derivatives, CS2, dioxane, MeNO2, cyclohexane, CH2ClCH:-CH2, CCl4, CHBr3, and binary and ternary mixtures of these compounds (in a polycrystalline state obtained by a rapid cooling of the samples with liquid N) by means of a ruby laser (maximum output 20 MW) provided with a resonance filter. Twelve overtones of the 220-cm-1 line were observed in the spectrum of powd. crystalline S at 77°K. Two intense and 1 weak overtones of the 460-cm-1 line appeared in the spectrum of CCl4. The stimulated Raman line of CHBr3 at 155 cm-1 is fully depolarized (σho = 0.78) in the spontaneous Raman spectrum and is related to the antisym. vibration. In some cases, the relative thresholds of generation of the stimulated Raman scattering in crystallized mixtures were measured. Lines possessing the frequencies of the sum vibrations are not always excited simultaneously with the lines of individual components of the sum vibrations; a line at 656 cm-1 with 2 overtones and a weak line at 1345 cm-1 were observed in the spectrum of a CS2PhNO2 mixture but their combination was missing. An ability to generate external vibrations in CS2 and paraisomers of bromobenzoic acid, dibromobenzene, and nitroaniline (the 2 former at 77°K; the 2 latter at liquid He temperature) was discovered. A modulation of light at 75 cm-1 was observed in the spectrum of CS2. The vibration frequencies of 20 and 27 cm-1 appeared in the spectra of p-dibromobenzene and p-bromobenzoic acid, resp. External (40, 41, 2 × 40, and 3 × 40 cm-1) and internal (1276, 1280, and 1313 cm-1) vibrations can be observed simultaneously in the spectrum of nitroaniline at 15-20°K. The generation threshold for the 1086-cm-1 line becomes lower by a factor of 1/2.3 and the width of this line in the spontaneous Raman spectrum becomes lower by a factor of 1/1.7 by cooling the calcite crystal from 300 to 80°K. The effect of circular polarization of the laser radiation on the intensity of stimulated Raman lines was studied. Frozen C6H6, o-xylene, PhMe, and CS2 show a luminescence with the duration of 0.7, 0.25, 0.15, and 0.1 sec, resp.; the circular polarization weakens the phosphorescence of these compounds by a factor of 1/1.5 but the stimulated Raman scattering is strengthened simultaneously. Circular polarization of the exciting radiation is accompanied by a strengthening of stimulated Raman scattering also in frozen MeNO2, CHBr3, and dichloroethane.
Zhurnal Prikladnoi Spektroskopii published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Application of Bis(4-nitrophenyl)amine.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia