✦ LIBER ✦

The structure of the charge transfer complex in olefin quenching of benzophenone phosphorescence

✍ Scribed by Mitchell A. Winnik; Cheng-Kuo Hsiao

Publisher: Elsevier Science
Year: 1975
Tongue: English
Weight: 377 KB
Volume: 33
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(75)85764-2

No coin nor oath required. For personal study only.

✦ Synopsis

~~he~pliosphorescence lifetimes of w-alkenyl esters ofp-benzophenonecarbosylic acid have been measured in dilute solution in degasssd acetic acid solution. The lifetimes were estrapolated to infinite dilution. Intramolecular quenching was not very significant in benzophenonc4COa (CH-_ ),,CH=CHa for ,I = 1, 2 or 4. For n = 9 the phosphorescence lifetime NTIS found to be 2 tis compared to 70 .US for !I = 1, 2. These results are interpreted to mean that the quenching complex has a specific geometric requirement with the -CH=CHa poup approac!ring within a van der Wnals distance of the ketone carbonyl group.

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