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Polarized FT-NIR spectra of m-nitroaniline single crystals in the 4200-10500 cm-1 region, non-irradiated and irradiated at 9700 cm-1, corresponding to the -NH2 stretching second overtone (3 NH s 2 ), were recorded from 300 to 380 K. Direct heating from 325 K to 365 K (phase transition) caused an elevation of the relative background absorbance (A) near 10500 cm-1 . The irradiation by low intensity...
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