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On the Phosphorescence of 1 H ‐Phenalen‐1‐one
Author(s) -
Flors Cristina,
ll Santi
Publication year - 2001
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/1522-2675(20010919)84:9<2533::aid-hlca2533>3.0.co;2-l
Subject(s) - phosphorescence , chemistry , methylcyclohexane , photochemistry , quantum yield , organic chemistry , fluorescence , optics , physics , catalysis
Combining the effects of heavy atom and low temperature, the phosphorescence spectrum from 1 H ‐phenalen‐1‐one has been unveiled. The 0‐0 band is located at 649 nm in methylcyclohexane and shifted to 646 nm in ethanol, which sets the triplet‐energy level to 185 and 186 kJ⋅mol −1 , respectively. The emission is unambiguously identified as phosphorescence originating from 1 H ‐phenalen‐1‐one through complementary transient absorption and emission studies. The quantum yield for triplet formation is confirmed to be unity.