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Volumn 104, Issue 21, 2000, Pages 4896-4905

Magnetic field effects on chemical reactions of biradical radical ion pairs in homogeneous fluid solvents

Author keywords

[No Author keywords available]

Indexed keywords

CHEMICAL REACTIONS; MOLECULES; PARAMAGNETIC RESONANCE; PHOTOLYSIS; QUENCHING; SOLVENTS;

EID: 0033748948     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp0007437     Document Type: Article
Times cited : (81)

References (108)
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    • + with the cryptand prevents ion pairing
    • + with the cryptand prevents ion pairing,
  • 51
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    • note
    • -1 compared with that in benzene.
  • 52
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    • note
    • (a) For the reaction of Al-R-, the polarization of the sharp signal changed from emission to absorption at ca. 800 ns and then decayed to the baseline in 2.5 μs. These results suggested that not only the T-D quenching but also the spin-selective backward ET of BRIP should generate polarization of the TEMPO moiety of A1-R·.
  • 53
    • 85037447215 scopus 로고    scopus 로고
    • note
    • 3MPTZ* with An-R· is under investigation.
  • 55
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    • Under the conditions of our TREPR measurements, the decay of signal to the baseline before the laser pulse corresponds to the establishment of the thermal equilibrium.
    • (a) Under the conditions of our TREPR measurements, the decay of signal to the baseline before the laser pulse corresponds to the establishment of the thermal equilibrium.
  • 56
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    • 5f
    • 5f
  • 57
    • 85037447403 scopus 로고    scopus 로고
    • note
    • McCN. The following values were assumed: R = 7.0 Å, r+ = 3.5 Å, r- = 3.0 Å.
  • 59
    • 85037463135 scopus 로고    scopus 로고
    • note
    • 2 (this work).
  • 60
    • 85037459114 scopus 로고    scopus 로고
    • note
    • T = 2.64 eV), because the phosphorescence spectrum of N,N′-dipentyl-pyromellitic diimide was reported to show a broad band around 500 nm.
  • 65
    • 85037474692 scopus 로고    scopus 로고
    • note
    • -1 for such IP in MeCN at 293 K, which agrees with the observed value,
  • 72
    • 85037479455 scopus 로고    scopus 로고
    • note
    • ̇+ exhibited MFEs quite similar to those on the R(B) values. See ref 26.
  • 73
    • 85037472878 scopus 로고    scopus 로고
    • note
    • FI value and the magnitude of MFEs.
  • 74
    • 85037486699 scopus 로고    scopus 로고
    • note
    • ̇--R· had almost disappeared by 1.8 μs.
  • 75
    • 85037462503 scopus 로고    scopus 로고
    • note
    • 0 was independent of B.
  • 87
    • 85037449633 scopus 로고    scopus 로고
    • note
    • 3MPTZ* with Al in the presence of 1 mM of TEMPO were almost the same as the corresponding values without TEMPO.
  • 88
    • 85037468685 scopus 로고    scopus 로고
    • note
    • 1/2 mixing and undergoes the backward ET reaction.
  • 90
    • 85037463177 scopus 로고    scopus 로고
    • note
    • 3MPTZ* is unknown. However; the TREPR spectrum observed in the quenching of the TI state of unsubstituted phenothiazine by TEMPO in 2-PrOH also exhibits a net emissive three-line signal with an almost 1:1:1 ratio due to TEMPO.48c
  • 92
    • 85037468497 scopus 로고    scopus 로고
    • note
    • 48c
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    • 85037447177 scopus 로고    scopus 로고
    • note
    • ̇- by UHF calculation. The same geometry was used as the case of the point-dipole approximation. The calculated values are |D′| = 5.65 and |E′| = 0.06 mT for the extended conformer, while |D′| = 8.09 and |E′| = 0.21 mT for the folded one.
  • 96
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    • note
    • ̇--R·] estimated with eq 6a.
  • 105
    • 85037476262 scopus 로고    scopus 로고
    • note
    • 49
  • 106
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    • -) of TEMPO (R·) is readily protonated to give the corresponding hydroxylamine (RH), which exhibits no optical absorption in visible region. Fish, J. R.; Swarts, S. G.; Sevilla, M. D.; Malinski, T. J. Phys. Chem. 1988, 92, 3745-3751.
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  • 107
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    • (b) TEMPO is reduced more easily in hydroxylic solvents than in aprotic solvents. For example, the reduction potential of TEMPO measured in MeOH is less negative by 1.2 V than that obtained in THF. Green, S.; Fox, M. A. J. Phys. Chem. 1999, 103, 5416-5424.
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    • Green, S.1    Fox, M.A.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.