Aggregation of 1-Palmitoyl-2-Oleoyl-Sn-Glycero-3-Phosphocholine in Nonaqueous Solutions Studied by Spectroscopic and Kinetic Probe Molecules and Dynamic Light Scattering
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| 024 | 7 | 0 | |a 10.1524/zpch.218.4.425.29197 |2 doi |
| 035 | |a (NATIONALLICENCE)gruyter-10.1524/zpch.218.4.425.29197 | ||
| 245 | 0 | 0 | |a Aggregation of 1-Palmitoyl-2-Oleoyl-Sn-Glycero-3-Phosphocholine in Nonaqueous Solutions Studied by Spectroscopic and Kinetic Probe Molecules and Dynamic Light Scattering |h [Elektronische Daten] |c [Shaoying Wen, Bernd Kohlstrunk, Martin Helmstedt, Helmut Knoll] |
| 520 | 3 | |a The aggregation behavior of 1-Palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) in the nonaqueous solvents formamide (FA) and 3-hydroxypropionitrile (HPN) has been studied. UV/Vis absorption maximum λmax and thermal cis → trans isomerization rate constant kiso of an azo dye, as well as fluorescence intensity ratios IM/IE of monomer and excimer, and the excimer lifetime τE of two dipyrenyl compounds as probe molecules have been determined. For comparison, aggregation of the amphiphile POPC molecules was followed "probe-free” by means of dynamic light scattering (DLS) measurements. Combining the results of probe molecule studies and DLS it turned out that the critical aggregation concentration of POPC in FA < 0.05mmol dm−3. At ≥ 0.2mmol dm−3, aggregates have hydrodynamic radii 30 < Rh < 80nm and high microviscosity in their hydrocarbon interior. A vesicle-like structure of the aggregates can therefore be assumed. Aggregation behavior of POPC in HPN is much less pronounced, essentially small aggregates with radii of a few nanometer have been detected which include solvent molecules. | |
| 540 | |a © 2004 Oldenbourg Wissenschaftsverlag GmbH | ||
| 690 | 7 | |a Thermodynamics & statistical physics |2 nationallicence | |
| 690 | 7 | |a Laboratory techniques, experiments |2 nationallicence | |
| 690 | 7 | |a Physical chemistry |2 nationallicence | |
| 700 | 1 | |a Wen |D Shaoying |4 aut | |
| 700 | 1 | |a Kohlstrunk |D Bernd |4 aut | |
| 700 | 1 | |a Helmstedt |D Martin |4 aut | |
| 700 | 1 | |a Knoll |D Helmut |4 aut | |
| 773 | 0 | |t Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics |d Oldenbourg Wissenschaftsverlag GmbH |g 218/4/2004(2004-04-01), 425-438 |x 0942-9352 |q 218:4/2004<425 |1 2004 |2 218 |o zpch | |
| 856 | 4 | 0 | |u https://doi.org/10.1524/zpch.218.4.425.29197 |q text/html |z Onlinezugriff via DOI |
| 908 | |D 1 |a research article |2 jats | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1524/zpch.218.4.425.29197 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Wen |D Shaoying |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Kohlstrunk |D Bernd |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Helmstedt |D Martin |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Knoll |D Helmut |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics |d Oldenbourg Wissenschaftsverlag GmbH |g 218/4/2004(2004-04-01), 425-438 |x 0942-9352 |q 218:4/2004<425 |1 2004 |2 218 |o zpch | ||
| 900 | 7 | |b CC0 |u http://creativecommons.org/publicdomain/zero/1.0 |2 nationallicence | |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-gruyter | ||