Magnetic Field and Magnetic Isotope Effects on the Products of Organic Reactions

Gould, Ian R.; Turro, Nicholas J.; Zimmt, Matthew B.

doi:10.1016/s0065-3160(08)60147-1

Cited by 76 publications

(76 citation statements)

References 44 publications

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“…On applying an external MF, the degeneracy of the triplet states is destroyed due to Zeeman splitting and consequently, intersystem crossing is reduced. This leads to an increase in the population of the initial spin state [15][16][17]. In our work, a significant MF effect was observed for the 380 nm peak in presence of the amines, indicating the formation of radical ions/radicals at this wavelength.…”

Section: Introductionsupporting

confidence: 53%

Does phenazine form triplet excimer and dimer anion radical?

Choudhury

Basu

2007

Journal of Luminescence

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Section: Introductionsupporting

confidence: 53%

Does phenazine form triplet excimer and dimer anion radical?

Choudhury

Basu

2007

Journal of Luminescence

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“…Points to be emphasised are as follows: (a) Since direct excitation of ANH does not yield lc there is no obvious reason why direct excitation of AN-AN should yield AN-AN' (6) via direct hydrogen transfer. We therefore attribute the related but quite distinct behaviour of 'AN-AN* and 3AN-AN* to the anticipated difference in radical pair multiplicities (cJ Gould et al, 1984). (b) Cleavage of the C(10)-C(10') bond of 'AN-AN* leads to a radical pair with singlet multiplicity, AN' t , AN' 1 .…”

Section: Discussionmentioning

confidence: 92%

Anthralin‐derived Transients—ii. Formation of the Radical by Spontaneous Fragmentation of Both Singlet and Triplet States of the 10,10′‐dehydrodimer: Radical Pair Multiplicity Effects

Bruce¹,

Dodd²,

Gorman³

et al. 1990

Photochem & Photobiology

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The singlet and triplet states of the anthralin (1,8-dihydroxy-9-anthrone) dehydrodimer have been produced selectively in benzene via pulsed laser excitation and pulse radiolysis respectively. The lifetime of S1 is less than or equal to 30 ps, that of T1 short but unspecified. Both states fragment spontaneously to yield a pair of anthralin radicals. The singlet radical pair predominantly undergoes geminate recombination within the solvent cage. In contrast, the corresponding triplet radical pair undergoes essentially exclusive cage escape to give the anthralin free radical (lambda max 370, 490 and 720 nm) which recombines under normal diffusive conditions. Both recombination processes lead, at least in part, to one or more species which have been assigned as tautomeric forms of the original dimer. The anthralin free radical in benzene is insensitive to the vitamin E model 6-hydroxy-2,2,5,7,8-pentamethylchroman and reacts only slowly with oxygen.

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“…Certain reaction paths are enhanced, and then retarded, as the field strength is increased (117)(118)(119)(120)(121)(122)(123). However, there is experimental evidence for an effect of static magnetic fields on the yields of some photochemical and organic chemistry reactions involving free radical intermediates.…”

Section: Magnetic Effects On Chemical Reactionsmentioning

confidence: 99%