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Luminescence peculiarities of polyamide-6 α and γ forms

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Abstract

Persistent time-delayed luminescence was observed in bulk polymer Polyamide-6 (nylon 6) samples at room temperature. Using X-ray 2Θ-diagnostics we have separated two crystalline forms of the material which exhibit serious differences in their time-delayed luminescence properties. Whilst for the α-form the afterglow temperature threshold is at the range of 100 °C, the γ-form samples require cooling to about −20 °C for the effect becomes observed by eye. The afterglow relaxation traces are highly reproducible and we extracted the Becquerel law function (compressed hyperbola) for them. The conclusion derived on the origin of the effect is the photoinduced charge recombination process. A theoretical model is presented for the explanation of the experimental results.

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References

  1. H. Pope, C.E. Swenberg, Electronic Processes in Organic Crystals, 2nd edn. (Oxford University Press, Oxford, 1999).

    Google Scholar 

  2. Yu.V. Romanovskii, A. Gerhard, B. Schweitzer, U. Scherf, R.I. Personov, H. Bässler, Phosphorescence of π-conjugated oligomers and polymers. Phys. Rev. Lett. 84, 1027–1030 (2000)

    Article  ADS  Google Scholar 

  3. J. Partee, E.L. Frankevich, B. Uhlhorn, J. Shinar, Y. Ding, T.J. Barton, Delayed fluorescence and triplet-triplet annihilation in π-conjugated polymers. Phys. Rev. Lett. 82, 3673 (1999)

    Article  ADS  Google Scholar 

  4. W. Klöpffer, Luminescence of poly(n-vinyl-carbazole) films at 77 K. II. Kinetic model of exciton trapping and annihilation. Chem. Phys. 57, 75–87 (1981)

    Article  Google Scholar 

  5. D.R. Holmes, C.W. Bunn, D.J. Smith, The crystal structure of polycaproamide: nylon 6. J. Polym. Sci. XVII, 159–177 (1955)

    Article  ADS  Google Scholar 

  6. H.M. Heuvel, R. Huisman, Effects of winding speed, drawing and heating on the crystalline structure of nylon 6 yarns. J. Appl. Polym. Sci. 26, 713–732 (1981)

    Article  Google Scholar 

  7. N. Vasanthan, D.R. Salem, FTIR spectroscopic characterization of structural changes in polyamide-6 fibers during annealing and drawing. J. Polym. Sci. B 39, 536–547 (2001)

    Article  Google Scholar 

  8. M.V. Vasnetsov, V.V. Ponevchinsky, A.A. Mitryaev, D.O. Plutenko, Observation of room-temperature afterglow in polyamide-6 under UV excitation. SPQEO 22, 333–337 (2019)

    Article  Google Scholar 

  9. S.M. Aharoni, N-Nylons, Their Synthesis, Structure and Properties (John Wiley & Sons, New York, 1997), pp. 316–317

    Google Scholar 

  10. N.S. Allen, M.J. Harrison, Analysis of the fluorescent and phosphorescent species in nylon-6,6 in relation to aldol condensation products of cyclopent anone. Eur. Polym. J. 21, 517–526 (1985)

    Article  Google Scholar 

  11. M.N. Berberan-Santos, E.N. Bodunov, B. Valeur, Mathematical functions for the analysis of luminescence decays with underlying distributions: 2. Becquerel (compressed hyperbola) and related decay functions. Chem. 317, 57–62 (2005)

    Google Scholar 

  12. T. Matsuzawa, A new long phosphorescent phosphor with high brightness. J. Electrochem. Soc. 143, 2670 (1996)

    Article  ADS  Google Scholar 

  13. F. Clabau, X. Rocquefelte, S. Jobic, P. Deniard, Mechanism of phosphorescence appropriate for the long-lasting phosphors Eu2+-doped SrAl2O4 with codopants Dy3+ and B3+. Chem. Mater. 17, 3904 (2005)

    Article  Google Scholar 

  14. T. Aitasalo, J. Hölsä, H. Jungner, M. Lastusaari, Mechanisms of persistent luminescence in Eu2+, RE3+ doped alkaline earth aluminates. J. Lumin. 94–95, 59 (2001)

    Article  Google Scholar 

  15. H.F. Brito, J. Hölsä, T. Laamanen, M. Lastusaari, M. Malkamäki, L.C.V. Rodrigues, Persistent luminescence mechanisms: human imagination at work. Opt. Mater. Express 2, 371 (2012)

    Article  ADS  Google Scholar 

  16. V. Vitola, D. Millers, I. Bite, K. Smits, A. Spustaka, Recent progress in understanding the persistent luminescence in SrAl2O4: EuDy. Mater. Sci. Technol. 35, 1661–1677 (2019). https://doi.org/10.1080/02670836.2019.1649802

    Article  Google Scholar 

  17. M. Yokoyama, S. Shimokihara, A. Matsubara, H. Mikawa, Extrinsic carrier photogeneration in poly-N-vinylcarbazole. III. CT fluorescence quenching by an electric field. J. Chem. Phys. 76, 724 (1982)

    Article  ADS  Google Scholar 

  18. B. Schweitzer, V.I. Arkhipov, H. Bässler, Geminate pair recombination in a conjugated polymer. Chem. Phys. Lett. 304, 365 (1999)

    Article  ADS  Google Scholar 

  19. I. Glowacki, Z. Szamel, The nature of trapping sites and recombination centres in PVK and PVK–PBD electroluminescent matrices seen by spectrally resolved thermoluminescence. J. Phys. D Appl. Phys. 43(29), 295101 (2010)

    Article  Google Scholar 

  20. A. Kadashchuk, Yu. Skryshevskii, A. Vakhnin, N. Ostapenko, Thermally stimulated photoluminescence in disordered organic materials. Phys. Rev. B 63, 115205 (2001)

    Article  ADS  Google Scholar 

  21. V. Pagonis, C. Kulp, C.-G. Chaney, M. Tachiya, Quantum tunneling recombination in a system of randomly distributed trapped electrons and positive ions. J. Phys. Condens. Matter 29, 365701 (2017)

    Article  Google Scholar 

  22. D.J. Huntley, An explanation of the power-law decay of luminescence. J. Phys. Condens. Matter 18, 1359 (2006)

    Article  ADS  Google Scholar 

  23. M.V. Vasnetsov, VYu. Bazhenov, V.V. Ponevchinsky, A.A. Mitryaev, A.D. Kudryavtseva, N.V. Tcherniega, Spectralswitching in a time-delayed emission from synthetic opal. Int. J. Photon. Opt. Technol. 3, 22–24 (2017)

    Google Scholar 

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Acknowledgements

The authors wish to thank Prof. G. I. Dovbeshko, Prof. A. K. Kadashchuk and Prof. N. I. Ostapenko for helpful considerations and Dr. L. N. Bugayova for the PA-6 samples supply. This study was performed within the project “Photophysics of the processes of optical radiation interaction with photorefractive, solid-state and bio-organic media” by National Academy of Sciences of Ukraine.

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Authors and Affiliations

  1. Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, Kyiv, 03028, Ukraine

    M. V. Vasnetsov, V. V. Ponevchinsky, D. O. Plutenko, G. V. Klishevich & A. A. Mitryaev

  2. V. E. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Prospect Nauki 41, Kyiv, 03028, Ukraine

    O. I. Gudymenko & V. P. Kladko

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  1. M. V. Vasnetsov
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  2. V. V. Ponevchinsky
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  3. D. O. Plutenko
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  4. G. V. Klishevich
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  5. A. A. Mitryaev
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  6. O. I. Gudymenko
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  7. V. P. Kladko
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Correspondence to M. V. Vasnetsov.

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Vasnetsov, M.V., Ponevchinsky, V.V., Plutenko, D.O. et al. Luminescence peculiarities of polyamide-6 α and γ forms. Appl. Phys. B 127, 53 (2021). https://doi.org/10.1007/s00340-021-07601-0

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  • DOI: https://doi.org/10.1007/s00340-021-07601-0

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