Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Josef Bartoš"'
Autor:
Josef Bartoš, Helena Švajdlenková
Publikováno v:
International Journal of Molecular Sciences, Vol 24, Iss 18, p 14252 (2023)
The spectral and dynamic properties of 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) in a series of 1-alkanols ranging from methanol to 1-decanol over a temperature range 100–300 K were investigated by electron spin resonance (ESR). The main charact
Externí odkaz:
https://doaj.org/article/03252ac533bf4ea39596376575625bac
Autor:
Josef Bartoš, Bożena Zgardzińska, Helena Švajdlenková, Barbara Charmas, Miroslava Lukešová, Konrad Wysogląd, Magdalena Goździuk
Publikováno v:
Materials, Vol 15, Iss 2, p 462 (2022)
A combined study of one of the simplest aromatic hydrocarbons, i.e., methylbenzene (toluene) (TOL), via the annihilation of an ortho-positronium (o-Ps) probe via positron annihilation lifetime spectroscopy (PALS) and the rotation dynamics of nitroxid
Externí odkaz:
https://doaj.org/article/2bd7fca67cd84218855977db6faf210f
Autor:
Helena Švajdlenková, Ondrej Šauša, Sergey V. Adichtchev, Nikolay V. Surovtsev, Vladimir N. Novikov, Josef Bartoš
Publikováno v:
Polymers, Vol 13, Iss 2, p 294 (2021)
We report on the reorientation dynamics of small spin probe 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) in cis-1,4-poly(isoprene) (cis-1,4-PIP10k) from electron spin resonance (ESR) and the free volume of cis-1,4-PIP10k from positron annihilation l
Externí odkaz:
https://doaj.org/article/665652afbeeb4425a9750f807ec542d0
Publikováno v:
Polymers, Vol 12, Iss 3, p 610 (2020)
The dynamics of n-propanol confined in regular MCM-41 matrix with the pore size Dpore = 40 Å, under various matrix conditioning and sample confining conditions, using broadband dielectric spectroscopy (BDS), is reported. First, various drying proced
Externí odkaz:
https://doaj.org/article/1b5b77e3d43140fcb46f48fa0fd605a6
Publikováno v:
The Journal of Physical Chemistry C. 125:15796-15811
Publikováno v:
RSC Advances. 10:2283-2294
A combined investigation of the spin probe TEMPO mobility and the free volume holes in n-propanol (n-PrOH) confined in a regular virgin MCM-41 matrix by means of ESR or PALS techniques, respectively, is reported. Dynamics of spin probe TEMPO alters a
Publikováno v:
Journal of Non-Crystalline Solids. 511:1-9
A joint investigation of n-undecane (n-UND) in the bulk and confined states in irregular silica gel (SG) matrices differing in their surface composition via two extrinsic probes using positron annihilation lifetime spectroscopy (PALS) and electron sp
Autor:
Ondrej Šauša, V. N. Novikov, Helena Švajdlenková, Nikolay V. Surovtsev, Sergey V. Adichtchev, Josef Bartoš
Publikováno v:
Polymers
Volume 13
Issue 2
Polymers, Vol 13, Iss 294, p 294 (2021)
Volume 13
Issue 2
Polymers, Vol 13, Iss 294, p 294 (2021)
We report on the reorientation dynamics of small spin probe 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) in cis-1,4-poly(isoprene) (cis-1,4-PIP10k) from electron spin resonance (ESR) and the free volume of cis-1,4-PIP10k from positron annihilation l
Autor:
Helena, Švajdlenková, Ondrej, Šauša, Sergey V, Adichtchev, Nikolay V, Surovtsev, Vladimir N, Novikov, Josef, Bartoš
Publikováno v:
Polymers
We report on the reorientation dynamics of small spin probe 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) in cis-1,4-poly(isoprene) (cis-1,4-PIP10k) from electron spin resonance (ESR) and the free volume of cis-1,4-PIP10k from positron annihilation l
Publikováno v:
Chemical Physics Letters. 700:102-107
A joint study of the spin probe TEMPO dynamics by ESR and the annihilation rate of ortho-positronium by PALS in four short-and medium-sized n-alkanes is presented. In addition to the usually observed changes in both the reorientation dynamics and siz