Abstract
Laser flash photolysis study on highly fluorescent and stable salt of 9-phenylxanthenium cation in neutral condition has been carried out for the first time. A new transient absorption band of this extensively studied system that perhaps remained buried under the fluorescence envelope and hitherto undetected has been identified and attributed to the triplet state of the system. This oxygen-insensitive triplet–triplet absorption band in the 480–600 nm range is expected to trigger new studies exploring the reactivity of the triplet state of this system, which has so far received very little attention. Laser flash photolysis study on a highly fluorescent and stable salt of 9-phenylxanthenium cation in neutral condition is reported. A new transient absorption band observed for the system has been attributed to the triplet state of the system.
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