1971
DOI: 10.1002/bbpc.19710750513
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Pulsradiolyse und Polarographie: Halbstufenpotentiale für die Oxydation und Reduktion von kurzlebigen organischen Radikalen an der Hg‐Elektrode

Abstract: Eine Methode zur Polarographie von kurzlebigen Radikalen (<10−4s) wird beschrieben. Die Radikale werden durch einen 50 ns‐Puls energiereicher Elektronen in der Umgebung eines fallenden Hg‐Tropfens erzeugt. Durch Registrierung der Strom‐Zeit‐Kurve nach dem Strahlpuls und bei verschiedenen Potentialen der Hg‐Elektrode wird das Polarogramm erhalten. Als Ausgangsstoffe dienten Nitrobenzol, gesättigte Alkohole, Benzol und Ameisensäure in verdünnter wäßriger Lösung; untersucht wurden die aus ihnen durch Angriff des … Show more

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Cited by 219 publications
(80 citation statements)
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“…These absorptions decay with first half lifetimes of 6 and lops, respectively. Knowing the rate constant of reaction (6) and the initial concentrations of P-and CO;, one can calculate that the absorption of P-should decay with first half lifetimes of 13 and 12 ps, respectively, provided that P-decays only via reaction (6). The faster rate of disappearance of P-is attributed to the additional deactivation reaction P,i, + co,aq -Pmic + co,., .…”
Section: Results and Discussion A) Solutions Containing Singlet Pyrenmentioning
confidence: 98%
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“…These absorptions decay with first half lifetimes of 6 and lops, respectively. Knowing the rate constant of reaction (6) and the initial concentrations of P-and CO;, one can calculate that the absorption of P-should decay with first half lifetimes of 13 and 12 ps, respectively, provided that P-decays only via reaction (6). The faster rate of disappearance of P-is attributed to the additional deactivation reaction P,i, + co,aq -Pmic + co,., .…”
Section: Results and Discussion A) Solutions Containing Singlet Pyrenmentioning
confidence: 98%
“…Depending on the CO, concentration, reaction (7) will also contribute to the disappearance of P-. As a result of reactions (8), (6), and (7), in which P-is produced and consumed concurrently, the optical absorption at 495 nm passes through a maximum and 3Pmic + COinq -P,i, + CO&. then decays as shown by the oscillograms in the second row of Fig.…”
Section: B) Solutions Of Triplet Pyrene and Carboxyl Radicalsmentioning
confidence: 95%
“…Concerning factor (1) it is general that AF0c > AF0D < AFOB (3,6) (27). Unlike formaldehyde where AF°c>> AF4t…”
Section: Hi-c-oh (-)C-oh Energies Of Formation Of H-c-oh and (-)C-oh mentioning
confidence: 99%
“…1 at pH 5, 7, and 9). The calculated standard free energies for conversion of FH2 + CH20 --F.. + CH30H ate near unity at pH [5][6][7][8][9] ( Fig. 2).…”
Section: Hi-c-oh (-)C-oh Energies Of Formation Of H-c-oh and (-)C-oh mentioning
confidence: 99%
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