The rate constants of fluorescence quenching of the acridizimum ion by alkyl bromides and iodides are determined by the donor behaviour (ionization potectial) of the quenchers. An encounter-CT complex is postulated, in which the quencher acts as an electron donor.
Heavy-atom effect on the phosphorescence of charge-transfer complexes
β Scribed by M. Gronkiewicz; B. Kozankiewicz; J. Prochorow
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 399 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
I:luorcsccncc and phosphorcsccncc spectra, decay times of phosphorcsccncc and quantum-ykld ratio of phosphoruscmcc to fluorescence. for B series of charge-transfer complexes of hexamethylbenzcne (an electron donor) with phthdic anhydridc and its monohalo-and tctrahdo-dcrivativcs, have bcun measured at 90 K. It is shown that changes ofdccay times and quantum-yield ratio of phosphorcsccncc to fluorcscencc are due to the heavy-atom effect of the charge-transfer phos-pllorcscalc~.
π SIMILAR VOLUMES
~~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