Lifetime of the Triplet State of Methylene Blue in the Presence of Salicylic Acid

Petr Sedlák, Tamás Vidóczy, Stanislav Luňák

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A break the lifetime of MBH2+ (T1) vs. salicylic acid concentration plot occurs at around 6 × 10 E(‐5) M (corresponding to pH of the solution 4.3). This pH is close to pK1 of leucomethylene blue. The quantum yields of 2,3‐dihydroxybenzoic acid increase with increasing salicylic acid concentration over the whole range investigated (9 × 10 E(‐6) ‐ 3 × 10 E(‐4)M); the growth of the quantum yields becomes more pronounced for pH < 4.35, too.

Original languageEnglish
Pages (from-to)987-988
Number of pages2
JournalBulletin des Sociétés Chimiques Belges
Issue number11
Publication statusPublished - 1992


ASJC Scopus subject areas

  • Chemistry(all)

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