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Abstract
Attempts are made to detect the weakly absorbing 1Lb bands in anthracene 1,5- and 1,8-disulphonates in glycerol glass by the method of photoselection. The fluorescence and absorption (excitation) spectra are separated into two component spectra based on short and long axis polarized transition dipoles and their vibrational analysis are made. The vibrational bands around 29762 cm−1 in 1,5-AS and 30303 cm−1 in 1,8-AS in absorption spectra are mainly due to 1Lb band.