Počet záznamů: 1
A combined atomic and molecular probe characterization of aromatic hydrocarbons via PALS and ESR: methylbenzene
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SYSNO ASEP 0552529 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A combined atomic and molecular probe characterization of aromatic hydrocarbons via PALS and ESR: methylbenzene Tvůrce(i) Bartoš, J. (SK)
Zgardzińska, B. (PL)
Švajdlenková, H. (SK)
Charmas, B. (PL)
Lukešová, Miroslava (UMCH-V) RID, ORCID
Wysoglad, K. (PL)
Goździuk, M. (PL)Číslo článku 462 Zdroj.dok. Materials. - : MDPI
Roč. 15, č. 2 (2022)Poč.str. 21 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova methylbenzene or toluene ; positronium ; free volume Vědní obor RIV CD - Makromolekulární chemie Obor OECD Polymer science Způsob publikování Open access Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000758471200001 EID SCOPUS 85122460805 DOI 10.3390/ma15020462 Anotace 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 nitroxide spin probe 2,2,6,6-tetramethyl-piperidinyl-1-oxy (TEMPO) using electron spin resonance (ESR) over a wide temperature range, 10–300 K, is reported. The o-Ps lifetime, τ3, and the relative o-Ps intensity, I3, as a function of temperature exhibit changes defining several characteristic PALS temperatures in the slowly and rapidly cooled samples. Similarly, the spectral parameter of TEMPO mobility in TOL, 2Azz‘, and its correlation time, τc, reveal several effects at a set of the characteristic ESR temperatures, which were determined and compared with the PALS results. Finally, the physical origins of the changes in free volume expansion and spin probe mobility are revealed. They are reflected in a series of the mutual coincidences between the characteristic PALS and ESR temperatures and appropriate complementary thermodynamic and dynamic techniques. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2023 Elektronická adresa https://www.mdpi.com/1996-1944/15/2/462
Počet záznamů: 1