Singlet and Triplet Products of the Geminate Recombination of a Radical Pair with a Single Magnetic Nucleus (I= 1/2)

The topology of the S1 PES is modulated by introducing a mutation at the F708 position. The mutation influences the photoactivation of the Co–C bond by decreasing the rate of geminate recombination and altering the rate of radical pair formation.

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Magnetic field effects in radical pair recombination. I. CIDNP and CIDEP in geminate recombination

Chemical Physics ◽

10.1016/0301-0104(90)80085-c ◽

1990 ◽

Vol 144 (2) ◽

pp. 201-222 ◽

Cited By ~ 57

Author(s):

A.I. Shushin

Keyword(s):

Magnetic Field ◽

Radical Pair ◽

Geminate Recombination ◽

Magnetic Field Effects ◽

Field Effects

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Magnetic Field Effect Studies Indicate Reduced Geminate Recombination of the Radical Pair in Substrate-Bound Adenosylcobalamin-Dependent Ethanolamine Ammonia Lyase

Journal of the American Chemical Society ◽

10.1021/ja077124x ◽

2007 ◽

Vol 129 (50) ◽

pp. 15718-15727 ◽

Cited By ~ 35

Author(s):

Alex R. Jones ◽

Sam Hay ◽

Jonathan R. Woodward ◽

Nigel S. Scrutton

Keyword(s):

Magnetic Field ◽

Field Effect ◽

Radical Pair ◽

Magnetic Field Effect ◽

Geminate Recombination

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CIDNP Effects of Sensitized Photochemical Dediazoniation of Arene Diazonium Salts Manipulating CIDNP Intensities by the Experimental Conditions

Zeitschrift für Naturforschung B ◽

10.1515/znb-1983-1211 ◽

1983 ◽

Vol 38 (12) ◽

pp. 1591-1597 ◽

Cited By ~ 12

Author(s):

Heinz G. O. Becker ◽

Dietmar Pfeifer ◽

Reiner Radeglia

Keyword(s):

Electron Transfer ◽

Radical Pair ◽

Charge Transfer Band ◽

Diazonium Salts ◽

Experimental Conditions ◽

Magnetic Nucleus ◽

Enhanced Absorption ◽

Reversible Electron Transfer ◽

The Time Domain ◽

Back Transfer

13C and 15N photo-CIDNP effects were determined for the reversible electron transfer from pyrene to arene diazonium salts on excitation of the charge transfer band at 360 nm. The diazonium salts being the products of back electron transfer (“cage products”) show enhanced absorption for 13 C(1) and the 15N-enriched diazonium group, whereas the escape products, ArH or 15N2, respectively, yield emission signals. It was shown that the intensities of the CIDNP effects depend on the rates of intersystem crossing kisc within the geminate radical pair, i.e. on the magnetic nucleus used as a probe of the CIDNP effect. Using 1H, 13C or 15N the time domain of observation can be manipulated in the ranges of 90-100 ns, 15-20 ns and 3-5 ns, respectively. Furthermore, the CIDNP intensities depend on the proper balance of the rate of electron back transfer, k-e, and the rate kp of formation of the escape product. Since k-e increases with increasing energy of the geminate radical pair, this balance and therefore the CIDNP intensities vary according to the substituent present and the electron donor used

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