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Modification of the hydrogen bonding network at the reversed micelles interface by near infrared radiation

Treść / Zawartość
Identyfikatory
Warianty tytułu
Konferencja
Electron Magnetic Resonance Forum EMR-PL (2; 16-18.05.2013; Częstochowa-Hucisko, Poland )
Języki publikacji
EN
Abstrakty
EN
The purpose of this paper is to prove that near infrared radiation (NIR) modifies hydrogen bonds localized in the interface of reversed micelles. The degree of modification of the hydrogen bonds was monitored by TEMPO-palmitate spin probe introduced into the structure of reverse micelles formed by cetyltrimethylammonium bromide (CTAB) (TCAB/phosphate buffer/isooctane/hexanol and TCAB/NaCl/isooctane/hexanol (W = 15)). Electron paramagnetic resonance (EPR) spectra were performed on the argonated samples. The isotropic tumbling correlation time (τc) and the hyperfine coupling constant A+ = h0 – h+1 (h+1, and h0 correspond to the low-, and centre-field lines, respectively) were determined from the EPR spectra as a quantitative measure for monitoring the action of NIR radiation. A+ values depend on the composition of the water pool (1.640 mT for phosphate buffer and 1.630 mT for NaCl). NIR irradiation led to decrease in A+. This parameter reached the same value for both solutions (1.625 ± 0.003 and 1.626 ± 0.003 mT) after exposition to NIR. The tumbling correlation time after exposure to NIR decreased for TCAB/phosphate buffer/ isooctane/hexanol reversed micelles from 2.10 × 10–10 s to 1.44 × 10–10 s but did not change for TCAB/NaCl/isooctane/ hexanol). The results obtained confirm the possibility of modification of the hydrogen bonds by NIR radiation.
Czasopismo
Rocznik
Strony
435--438
Opis fizyczny
Bibliogr. 29 poz., rys.
Twórcy
autor
  • Institute of Biomedical Engineering and Instrumentation, Wrocław University of Technology, 27 Wybrzeże Wyspiańskiego Str., 50-370 Wrocław, Poland, Tel.: +48 71 320 3186, Fax: +48 71 328 3696
autor
  • Institute of Biomedical Engineering and Instrumentation, Wrocław University of Technology, 27 Wybrzeże Wyspiańskiego Str., 50-370 Wrocław, Poland, Tel.: +48 71 320 3186, Fax: +48 71 328 3696
  • Institute of Biomedical Engineering and Instrumentation, Wrocław University of Technology, 27 Wybrzeże Wyspiańskiego Str., 50-370 Wrocław, Poland, Tel.: +48 71 320 3186, Fax: +48 71 328 3696
  • Institute of Biomedical Engineering and Instrumentation, Wrocław University of Technology, 27 Wybrzeże Wyspiańskiego Str., 50-370 Wrocław, Poland, Tel.: +48 71 320 3186, Fax: +48 71 328 3696
Bibliografia
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  • 2. Bales BB, Messina L, Vidal A, Peric M (1998) Precision relative aggregation number determination of SDS micelles using a spin probe. A model of micelle surface hydration. J Phys Chem B 102:10347–10358
  • 3. Behera GB, Mishra BK, Behera PK, Panda M (1999) Fluorescent probes for structural and distance studies in micelles, reversed micelles and microemulsions. Adv Colloid Interface Sci 82:1–42
  • 4. Burns DA, Ciurczak EW (eds) (1992) Handbook of near-infrared analysis. Marcel Dekker Inc, New York
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  • 6. Fang L, Gan-Zuo L, Han-Qing W, Qun-Ji Xu (1997) Studies on cetyltrimethylammonium bromide (CTAB) micelar solution and CTAB reversed microemulsion by ESR and 2H NMR. Colloids Surf A 127:89–96
  • 7. Haering G, Luisi PL, Hauser H (1988) Characterization by electron spin resonance of reversed micelles consisting of the ternary system AOT-isooctane-water. J Phys Chem 92:3574–3581
  • 8. Komorowska M, Białas W, Cuissot A, Czarnołęski A (2002) Erythrocyte response to near IR. J Photochem Photobiol B 68:93–1002
  • 9. Komorowska M, Czarnołęski A (2001) Near-infrared induced membrane surface electrostatic potential, fluorescent measurements. Colloids Surf B 20:309–314
  • 10. Komorowska M, Czyżewska H (1997) The effect of near IR on erythrocyte membranes; EPR study. Nukleonika 42:379–386
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  • 25. Silber JJ, Biasutti A, Abuin E, Luissi E (1999) Interactions of small molecules with reverse micelles. Adv Colloid Interface Sci 82:189–252
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  • 29. Zhang X, Zhang Q, Zhao DX (2011) Hydrogen bond lifetime definitions and the relaxation mechanism in water solutions. Acta Phys Chim Sin 27:2547–2552
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-4e16d03d-8cc6-4fef-b50e-d6b60865d291
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