Solute re-encounter probabilities from dissociative oxciplex relaxation

✍ Scribed by B. Stevens; R.D. Small Jr.

• Book ID: 103018591
• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 460 KB
• Volume: 61
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(79)80633-8

✦ Synopsis

Measurements of the quantum yield of self-sensitized 1,3_diphenylisobenzofuran percxidation as a function of dissohed oxygen and of added azulene concentrations indicate that oxygen quenching of the sensitizer single: state produces both triplet and ground states of the sensitizer In addition to Oz(l a,) and 0z(3r--,).This partitioning of quenching products may be due to the competitive relaxation of the initially formed co'%plev (oWip&J, or to sequential relaxation of different olciplel states in which symmetry an& spin barriers are negotiated by complex dissociation and reencounter of the solute pair in the required confieraltion-The latter inter -hUTI) +0*(3X$ and !H(Tr) + 02( P- retation provides re-encounter probabilities for the processes hl(Tl) i 02(' A,) theoretical expectation. Zg) -c X1(!&) + 02('Ag) from which estimated rdte constants are compatible kith