The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform
Ciril Pohar - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic characterization of Polyanetholesulfonic Acid and its alkaline salts
Journal of Physical Chemistry B, 2007Co-Authors: I Lipar, Petra Zalar, Ciril PoharAbstract:Experimental and theoretical results for the thermodynamic properties of Polyanetholesulfonic Acid and its lithium, sodium, and cesium salts in aqueous solution at 298 K are presented. The osmotic pressure was measured using membrane and vapor pressure apparatus in the concentration range cm = 0.001−0.30 monomoles/dm3. The osmotic coefficients obtained from these measurements were low, from 0.2 to 0.45 in this concentration range, indicating a strong interaction between counterions and polyions. The osmotic coefficients of the polyAcid and its lithium and sodium salts appeared to be equal within experimental error, but the results for the cesium salt were lower. This indicates a somewhat stronger binding of cesium ions to the polyanion. In addition, enthalpies of dilution, ΔHD, from a certain concentration, mm, to mm = 0.0044 monomoles/kg were measured. The measured heats of dilution were exothermic, with the Acid producing the strongest and the cesium salt the weakest effect. These results were compared ...
I Lipar - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic characterization of Polyanetholesulfonic Acid and its alkaline salts
Journal of Physical Chemistry B, 2007Co-Authors: I Lipar, Petra Zalar, Ciril PoharAbstract:Experimental and theoretical results for the thermodynamic properties of Polyanetholesulfonic Acid and its lithium, sodium, and cesium salts in aqueous solution at 298 K are presented. The osmotic pressure was measured using membrane and vapor pressure apparatus in the concentration range cm = 0.001−0.30 monomoles/dm3. The osmotic coefficients obtained from these measurements were low, from 0.2 to 0.45 in this concentration range, indicating a strong interaction between counterions and polyions. The osmotic coefficients of the polyAcid and its lithium and sodium salts appeared to be equal within experimental error, but the results for the cesium salt were lower. This indicates a somewhat stronger binding of cesium ions to the polyanion. In addition, enthalpies of dilution, ΔHD, from a certain concentration, mm, to mm = 0.0044 monomoles/kg were measured. The measured heats of dilution were exothermic, with the Acid producing the strongest and the cesium salt the weakest effect. These results were compared ...
Andrey V. Dobrynin - One of the best experts on this subject based on the ideXlab platform.
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Salt Effect on Osmotic Pressure of Polyelectrolyte Solutions: Simulation Study
Polymers, 2014Co-Authors: Jan-michael Y. Carrillo, Andrey V. DobryninAbstract:We present results of the hybrid Monte Carlo/molecular dynamics simulations of the osmotic pressure of salt solutions of polyelectrolytes. In our simulations, we used a coarse-grained representation of polyelectrolyte chains, counterions and salt ions. During simulation runs, we alternate Monte Carlo and molecular dynamics simulation steps. Monte Carlo steps were used to perform small ion exchange between simulation box containing salt ions (salt reservoir) and simulation box with polyelectrolyte chains, counterions and salt ions (polyelectrolyte solution). This allowed us to model Donnan equilibrium and partitioning of salt and counterions across membrane impermeable to polyelectrolyte chains. Our simulations have shown that the main contribution to the system osmotic pressure is due to salt ions and osmotically active counterions. The fraction of the condensed (osmotically inactive) counterions first increases with decreases in the solution ionic strength then it saturates. The reduced value of the system osmotic coefficient is a universal function of the ratio of the concentration of osmotically active counterions and salt concentration in salt reservoir. Simulation results are in a very good agreement with osmotic pressure measurements in sodium polystyrene sulfonate, DNA, polyacrylic Acid, sodium Polyanetholesulfonic Acid, polyvinylbenzoic Acid, and polydiallyldimethylammonium chloride solutions.
Chun Wei - One of the best experts on this subject based on the ideXlab platform.
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aie active Polyanetholesulfonic Acid sodium salts with room temperature phosphorescence characteristics for fe3 detection
RSC Advances, 2018Co-Authors: Xiaojin Qin, Shiqi Wang, Lian Luo, Huazhen Sun, Yongyang Gong, Bingli Jiang, Chun WeiAbstract:Room-temperature phosphorescent materials have been a major focus of research and development during the past decades, due to their applications in OLEDs, photovoltaic cells, chemical sensors, and bioimaging. However, achieving polymeric phosphorescent materials without heavy-metal atoms and halogens under ambient conditions remains a major challenge. Here, we report a polymeric phosphor, namely Polyanetholesulfonic Acid sodium salt, which not only has room temperature phosphorescence characteristic but also aggregation-induced emission and dependence on the excitation wavelength characteristics. Moreover, it can recognize Fe3+ effectively.
Petra Zalar - One of the best experts on this subject based on the ideXlab platform.
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thermodynamic characterization of Polyanetholesulfonic Acid and its alkaline salts
Journal of Physical Chemistry B, 2007Co-Authors: I Lipar, Petra Zalar, Ciril PoharAbstract:Experimental and theoretical results for the thermodynamic properties of Polyanetholesulfonic Acid and its lithium, sodium, and cesium salts in aqueous solution at 298 K are presented. The osmotic pressure was measured using membrane and vapor pressure apparatus in the concentration range cm = 0.001−0.30 monomoles/dm3. The osmotic coefficients obtained from these measurements were low, from 0.2 to 0.45 in this concentration range, indicating a strong interaction between counterions and polyions. The osmotic coefficients of the polyAcid and its lithium and sodium salts appeared to be equal within experimental error, but the results for the cesium salt were lower. This indicates a somewhat stronger binding of cesium ions to the polyanion. In addition, enthalpies of dilution, ΔHD, from a certain concentration, mm, to mm = 0.0044 monomoles/kg were measured. The measured heats of dilution were exothermic, with the Acid producing the strongest and the cesium salt the weakest effect. These results were compared ...