𝔖 Bobbio Scriptorium
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Löschung der Fluoreszenz aromatischer Urethane durch Ketone

✍ Scribed by Dr. J. Stumpe; Prof. Dr. K. Schwetlick; Prof. Dr. M. G. Kuzmin

Book ID
105352451
Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
533 KB
Volume
324
Category
Article
ISSN
1615-4150

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✦ Synopsis

Fluorescence Quenching of N‐Arylurethanes by Ketones

Fluorescence and photo‐Fries reaction of N‐aryl‐urethanes can be quenched by diffusion‐controlled energy transfer to biacetyl, acetone and other aliphatic ketones. Quenching of the photo reaction and fluorescence obeys the Stern‐ Volmer Equation.

The efficiency of quenching may by influenced by solvents and substituents changing the S~1~ energies of donors and acceptors. The identical rate constants determined by independent methods demonstrate that quenching of urethane fluorescence and photoreaction by aliphatic ketones occurs completely by singlet energy transfer.

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