Colouration Due To Polysulfide Radiacal Anions In Aluminoborosilicate Glasses (Text In Japanese/Tables In English)

The blue-violet colouration of two industrial aluminoborosilicate glasses was investigated using UV-visible, Raman, electron spin resonance (ESR) and fluorescent spectroscopy. Using UV-visible spectroscopy, absorption bands were found at 280nm, 400nm and 580nm. It was elucidated using resonance Raman and ESR spectroscopy that the absorption band at 580nm was due tot he S3 radical anion. Using fluorescent spectroscopy it was found that the absorption bands at 280nm and 400 nm were due to the S2 molecule and the S2 radical anion, respectively. It is demonstrated for the first time that anti-symmetric stretching mode (v3) of S3 is observed at 578cm-1 in the resonance Raman spectra.