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Emission spectra of 4-methyl-2,6-diacetylphenol in 3-methylpentane at room temperature and 77 K

✍ Scribed by Sivaprasad Mitra; Ranjan Das; Samaresh Mukherjee

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 418 KB
Volume: 228
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)00957-0

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✦ Synopsis

The fluorescence properties of 4-methyl-2,6_diacetylphenol

(MAOH) are examined in 3-methylpentane and quantum yield measurements are made at room temperature and 77 K. The fluorescence quantum yield is temperature and excitation wavelength dependent. The emission properties of MAOH at 77 K have been examined in relation to those of 4-methyl-2,6-diformylphenol (MFOH) . At this temperature, unlike MFOH, MAOH does not show any phosphorescence in 3-methylpentane. From this observation it is confirmed that phosphorescence appears due to the rotation of the formyl group in MFOH. The fluorescence decay rate of MAOH is relatively faster than that of MFOH and non-radiative decays are dominant in the decay processes of the excited states of both compounds.

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