Pretražite po imenu i prezimenu autora, mentora, urednika, prevoditelja

Napredna pretraga

Pregled bibliografske jedinice broj: 613462

Rotation of Four Small Nitroxide Probes in Supercooled Bulk Water


Perić, Ida; Merunka, Dalibor; Bales, Barney L.; Perić, Miroslav
Rotation of Four Small Nitroxide Probes in Supercooled Bulk Water // Journal of Physical Chemistry Letters, 4 (2013), 3; 508-513 doi:10.1021/jz302107x (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 613462 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Rotation of Four Small Nitroxide Probes in Supercooled Bulk Water

Autori
Perić, Ida ; Merunka, Dalibor ; Bales, Barney L. ; Perić, Miroslav

Izvornik
Journal of Physical Chemistry Letters (1948-7185) 4 (2013), 3; 508-513

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
rotational correlation time ; EPR spectral fitting ; Stokes-Einstein Debye equation ; hydrodynamic radius ; density fluctuations ; hydrogen bond

Sažetak
Using a precise method of least-squares nonlinear electron paramagnetic resonance (EPR) line fitting, we have obtained experimental evidence of a decoupling of the rotational motion of four nitroxide spin probes from the viscosity of bulk water at 277 K. This decoupling is about 50 K higher than another such phenomenon observed in interstitial supercooled water of polycrystalline ice by Banerjee et al. (Proc Natl Acad Sci USA 106 (2009) 11448-11453). Above 277 K the activation energies of the rotation of the probes and water viscosity are very close, while in the supercooled region the activation energies of the probes’ rotation are greater than that of the viscosity of water. The rotational correlation times of the probes can be fit well to a power law functionality with a singular temperature. The temperature dependence of the hydrodynamic radii of the probes indicates two distinct dynamical regions which cross at 277 K.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija



POVEZANOST RADA


Projekti:
098-0982915-2939 - Molekulska struktura i dinamika sustava s paramagnetskim česticama (Ilakovac-Kveder, Marina, MZOS ) ( POIROT)

Ustanove:
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Miroslav Perić (autor)

Avatar Url Dalibor Merunka (autor)

Poveznice na cjeloviti tekst rada:

doi pubs.acs.org doi.org

Citiraj ovu publikaciju:

Perić, Ida; Merunka, Dalibor; Bales, Barney L.; Perić, Miroslav
Rotation of Four Small Nitroxide Probes in Supercooled Bulk Water // Journal of Physical Chemistry Letters, 4 (2013), 3; 508-513 doi:10.1021/jz302107x (međunarodna recenzija, članak, znanstveni)
Perić, I., Merunka, D., Bales, B. & Perić, M. (2013) Rotation of Four Small Nitroxide Probes in Supercooled Bulk Water. Journal of Physical Chemistry Letters, 4 (3), 508-513 doi:10.1021/jz302107x.
@article{article, author = {Peri\'{c}, Ida and Merunka, Dalibor and Bales, Barney L. and Peri\'{c}, Miroslav}, year = {2013}, pages = {508-513}, DOI = {10.1021/jz302107x}, keywords = {rotational correlation time, EPR spectral fitting, Stokes-Einstein Debye equation, hydrodynamic radius, density fluctuations, hydrogen bond}, journal = {Journal of Physical Chemistry Letters}, doi = {10.1021/jz302107x}, volume = {4}, number = {3}, issn = {1948-7185}, title = {Rotation of Four Small Nitroxide Probes in Supercooled Bulk Water}, keyword = {rotational correlation time, EPR spectral fitting, Stokes-Einstein Debye equation, hydrodynamic radius, density fluctuations, hydrogen bond} }
@article{article, author = {Peri\'{c}, Ida and Merunka, Dalibor and Bales, Barney L. and Peri\'{c}, Miroslav}, year = {2013}, pages = {508-513}, DOI = {10.1021/jz302107x}, keywords = {rotational correlation time, EPR spectral fitting, Stokes-Einstein Debye equation, hydrodynamic radius, density fluctuations, hydrogen bond}, journal = {Journal of Physical Chemistry Letters}, doi = {10.1021/jz302107x}, volume = {4}, number = {3}, issn = {1948-7185}, title = {Rotation of Four Small Nitroxide Probes in Supercooled Bulk Water}, keyword = {rotational correlation time, EPR spectral fitting, Stokes-Einstein Debye equation, hydrodynamic radius, density fluctuations, hydrogen bond} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Citati:





    Contrast
    Increase Font
    Decrease Font
    Dyslexic Font