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ESR line width and exchange narrowing in recrystallized samples of hydrazyl and carbazyl

Ширина линий Е SR и обме нное сужение в рекристаллизованны х образцах гидрацила и карбацила

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Il Nuovo Cimento B (1971-1996)

Summary

A theoretical computation of the dipolar width ω2 10 and the exchange frequency Ω20 in powdered samples of DPPH and picryl-n-amino carbazyl (PAC) recrystallized from different solvents has been carried out. Kubo and Tomita theory of ESR line widths has been utilized. The broadening of ESR lines in the recrystallized samples of free radicals has been interpreted in terms of the changes produced in exchange narrowing caused by the molecular-addition complex formation of the free radicals with the solvent molecules. A suitable value of asymptotic Curie temperature has been determined for each sample.

Riassunto

Si é eseguito un caloolo teorico dell’ampiezza dipolare Ω2 10 e della frequenza di scambio Ω20 in campioni polverizzati di DPPH e di picril-n-amino carboazile (PAC) ricristallizzato da diversi solventi. Si é utilizzata la teoria di Kubo e Tomita delle ampiezze delle linee di ESR. L’allargamento delle linee di ESE nei campioni ricristallizzati di radicali liberi é stato interpretato in base ai cambiamenti prodotti nel restringimento di scambio causato dalla formazione di complessi dei radicali liberi con le molecole del solvente per addizione molecolare. Per ciascun campione si é determinate un opportuno valore della temperatura di Curie asintotica.

Резюме

Былo проведено теорет ическое вычисление биполярной ширины ωp2 10, и обменной частоты ω20 в пороппсообразны х образцах DPPH и пикрил-n-а мино пороппсообразных об разцах DPPH и пикрил-n-амин о карбацила (РАС), рекрис таллизоваиных из раз личных растворителей. B работ е была использована те ория Кубо и Томита для ширин линий ESR. Уширение ESR линий в рекристаллиз ованных образцах сво бодных радикалов было интер претировано в терминах превращен ий, образованных при о бменном сужении, вызванном молекулярным компле ксным соединением св ободных радикалов c молекулам и раствора. Для каждого образца была определ ена соответствующая вел ичина асимптотическ ой температуры Кюри.

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References

  1. F. Bruin andM. Bruin:Physica,22, 128 (1958).

    Google Scholar 

  2. G. E. Pake andT. R. Tuttle jr.:Phys. Rev. Lett.,3, 423 (1959).

    Article  ADS  MATH  Google Scholar 

  3. G. A. Hutchison, R. C. Pastor andA. Kowalsky:Journ. Chem. Phys.,20, 534 (1962).

    Article  ADS  Google Scholar 

  4. J. J. Lothe andG. Eia:Acta Chem. Scand.,12, 1535 (1958).

    Article  Google Scholar 

  5. J. P. Goldsborough, M. Mandel andG. E. Pake:Phys. Rev. Lett.,4, 13 (1960).

    Article  ADS  Google Scholar 

  6. J. R. Singer:Paramagnetic Resonance, Vol. 2,Proceedings of the First International Conference, Jerusalem, 16–20 July (New York, 1963), p. 577.

  7. A. Ye. Arbuzov, F. G. Valitova, N. S. Garifyanov andB. M. Kozyrev:Doklady Akad. Nauk SSSR,126, 774 (1959).

    Google Scholar 

  8. J. H. Vanvleck:Phys. Rev.,74, 1168 (1948).

    Article  ADS  Google Scholar 

  9. P. W. Anderson andP. R. Weiss:Rev. Mod. Phys.,25, 269 (1953).

    Article  ADS  MATH  Google Scholar 

  10. R. Kubo andK. Tomita:Journ. Phys. Soc. Japan,9, 888 (1954).

    Article  ADS  Google Scholar 

  11. A. K. Chirkov andA. A. Kokin:Zurn. éksp. Teor. Fiz.,30, 50 (1958).

    Google Scholar 

  12. W. Duffy jr.:Journ. Chem. Phys.,36, 490 (1962).

    Article  ADS  Google Scholar 

  13. Krishnaji andB. N. Misea:Journ. Chem. Phys.,41, 1027 (1964).

    Article  ADS  Google Scholar 

  14. B. N. Misra, S. K. Gupta andS. D. Sharma: submitted toInd. Journ. Pure and Appl. Phys.

  15. H. W. Dewijn andJ. C. M. Hennig:Physica,28, 692 (1962).

    Google Scholar 

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Authors and Affiliations

  1. Physics Department, Allahabad University, Allahabad

    B. N. Misra, S. K. Gupta & S. D. Sharma

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  1. B. N. Misra
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  2. S. K. Gupta
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  3. S. D. Sharma
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Misra, B.N., Gupta, S.K. & Sharma, S.D. ESR line width and exchange narrowing in recrystallized samples of hydrazyl and carbazyl. Nuovo Cim B 10, 560–564 (1972). https://doi.org/10.1007/BF02895531

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