|
1
|
Mehringer J, Hofmann E, Touraud D, Koltzenburg S, Kellermeier M, Kunz W. Salting-in and salting-out effects of short amphiphilic molecules: a balance between specific ion effects and hydrophobicity. Phys Chem Chem Phys 2021; 23:1381-1391. [DOI: 10.1039/d0cp05491g] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Salting-in or salting-out tendencies depend on a balance between headgroup-specific ion effects and the hydrophobicity of the tail.
Collapse
Affiliation(s)
- Johannes Mehringer
- Institute of Theoretical and Physical Chemistry
- University of Regensburg
- 93053 Regensburg
- Germany
| | - Evamaria Hofmann
- Institute of Theoretical and Physical Chemistry
- University of Regensburg
- 93053 Regensburg
- Germany
| | - Didier Touraud
- Institute of Theoretical and Physical Chemistry
- University of Regensburg
- 93053 Regensburg
- Germany
| | | | | | - Werner Kunz
- Institute of Theoretical and Physical Chemistry
- University of Regensburg
- 93053 Regensburg
- Germany
| |
Collapse
|
|
2
|
Hofmann MJ, Leontidis E, Motschmann H. The influence of lanthanide-(III)-nitrates on adsorbed monolayers of dodecylphosphorylcholine at the air-water interface. J Colloid Interface Sci 2019; 548:217-223. [DOI: 10.1016/j.jcis.2019.03.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 03/18/2019] [Accepted: 03/20/2019] [Indexed: 10/27/2022]
|
|
3
|
Huang Y, Meng L, Guo M, Zhao P, Zhang H, Chen S, Zhang J, Feng S. Synthesis, Properties, and Aggregation Behavior of Tetrasiloxane-Based Anionic Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4382-4389. [PMID: 29565594 DOI: 10.1021/acs.langmuir.8b00825] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Three silicone surfactants, 3-tris(trimethylsiloxy)silylpropyl sulfonate with different alkaline counterions (lithium, sodium, and potassium), were synthesized for the first time. Their chemical structures were confirmed by FT-IR spectra, 1H NMR, and ESI-MS, and their behaviors in aqueous solutions were investigated by surface tensiometry, electrical conductivity, dynamic light scattering, and different transmission electron microscopy techniques. These anionic silicone surfactants exhibited remarkable surface activity and could reduce the surface tension of water to as low as 19.8 mN/m at the critical aggregate concentration (CAC). The adsorption and aggregation behaviors of these surfactants were assessed by determining the adsorption efficiency, minimum average area per surfactant molecule, and thermodynamic parameters. The cryo-TEM results verified that these molecules could form vesicles in water above the CAC. Moreover, the lowest surface tension, the smallest CAC value, and the largest aggregate size have been reached with potassium counterions. Thus, the different behavior of these surfactants in water can be explained by the different sizes of the hydrated ions.
Collapse
Affiliation(s)
- Yue Huang
- Key Laboratory of Special Functional Aggregated Materials & Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , PR China
| | - Lina Meng
- Key Laboratory of Special Functional Aggregated Materials & Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , PR China
| | - Mengdong Guo
- Key Laboratory of Special Functional Aggregated Materials & Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , PR China
| | - Peijian Zhao
- Key Laboratory of Special Functional Aggregated Materials & Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , PR China
| | - Hongyan Zhang
- Key Laboratory of Special Functional Aggregated Materials & Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , PR China
| | - Shuwen Chen
- Key Laboratory of Special Functional Aggregated Materials & Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , PR China
| | - Jie Zhang
- Key Laboratory of Special Functional Aggregated Materials & Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , PR China
| | - Shengyu Feng
- Key Laboratory of Special Functional Aggregated Materials & Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , PR China
| |
Collapse
|