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250714s2025 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.5c01055
|2 doi
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|a DE-627
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| 041 |
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|a eng
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| 100 |
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|a Al-Sakkaf, Mohammed K
|e verfasserin
|4 aut
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| 245 |
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|a Deciphering Zn(II)-Carboxylic Acid Interactions
|b Tailoring Oil/Water Interfaces and Surfactant Efficiency
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|c 2025
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 27.05.2025
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|a published: Print-Electronic
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|a Citation Status Publisher
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| 520 |
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|a This study elucidates the synergistic interactions between dodecanoic acid (C12) and zinc ions (Zn2+) at oil/water interfaces, a critical phenomenon for understanding the intricate dynamics of surfactant systems. Interfacial tension (IFT) measurements, performed via pendant drop tensiometry, reveal that the pronounced affinity of C12 for the oil/water interface causes an approximate 35% reduction in the IFT (from 50 to about 32 mN/m). However, introducing Zn2+ ions with C12 created an IFT decrease to approximately 22 mN/m, representing an overall reduction of nearly 55%, indicative of their interactions that substantially enhance interfacial adsorption and promote molecular ordering. The stoichiometric relationship between C12 and Zn2+ exhibits a marked concentration dependency. This phenomenon underscores the complex nature of the involved interfacial assembly and the dual role of both C12 and Zn2+ in modulating the physicochemical properties of the interface, which has been supported by the complementary density functional theory (DFT) and COSMO-RS calculations. Moreover, vibrational sum frequency generation (VSFG) spectroscopy corroborates the experimental findings by detecting high-order alkane chain arrangements induced by the Zn2+ ions. These integrated methodologies demonstrate that the Zn2+ ion's role varies, depending on the surface coverage by C12, and causes a more ordered interfacial film under controlled conditions, optimizing the reduction of IFT. Our research introduces a promising approach for creating advanced surfactant systems, emphasizing the intricate role of metal cations like Zn2+ at interfaces in various chemical engineering and environmental management applications.applications
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|a Journal Article
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|a Emon Ali, A H M
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Baldelli, Steven
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Binabdi, Ali
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Andersson, Martin P
|e verfasserin
|4 aut
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| 700 |
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|a Sølling, Theis I
|e verfasserin
|4 aut
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| 700 |
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|a El Zohry, Ahmed M
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g (2025) vom: 27. Mai
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnas
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| 773 |
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|g year:2025
|g day:27
|g month:05
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|u http://dx.doi.org/10.1021/acs.langmuir.5c01055
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