TY - JOUR
T1 - Distinctive pressure effects on partitioning and rotational motions of nitroxide spin probes in dispersions of a triglyceride membrane
AU - Iwamoto, Shinpei
AU - Yoshioka, Daisuke
AU - Sueishi, Yoshimi
PY - 2006/10/30
Y1 - 2006/10/30
N2 - The effects of pressure were examined for the partitioning and rotational correlation time of nitroxide probes, TEMPO and DTBN, in dispersions of a triglyceride membrane. As external pressures increased, nitroxide probes shifted from the vesicle phase to the aqueous phase. Rotational correlation times of TEMPO and DTBN in the vesicle phase, determined from ESR line broadening, increased remarkably with increasing pressure, dependent of the molecular size of the nitroxide probes: ΔV‡ = 65.6 cm3 mol-1 for TEMPO and 24.4 cm3 mol-1 for DTBN. Based on the results, the microscopic properties inside the triglyceride membrane are discussed.
AB - The effects of pressure were examined for the partitioning and rotational correlation time of nitroxide probes, TEMPO and DTBN, in dispersions of a triglyceride membrane. As external pressures increased, nitroxide probes shifted from the vesicle phase to the aqueous phase. Rotational correlation times of TEMPO and DTBN in the vesicle phase, determined from ESR line broadening, increased remarkably with increasing pressure, dependent of the molecular size of the nitroxide probes: ΔV‡ = 65.6 cm3 mol-1 for TEMPO and 24.4 cm3 mol-1 for DTBN. Based on the results, the microscopic properties inside the triglyceride membrane are discussed.
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U2 - 10.1016/j.cplett.2006.09.031
DO - 10.1016/j.cplett.2006.09.031
M3 - Article
AN - SCOPUS:33749565565
SN - 0009-2614
VL - 430
SP - 314
EP - 318
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 4-6
ER -