Martin Reifarth, Marek Bekir, Alain M. Bapolisi, Evgenii Titov, Fabian Nusshardt, Julius Nowaczyk, Dmitry Grigoriev, Anjali Sharma, Peter Saalfrank, Svetlana Santer, Matthias Hartlieb, Alexander Böker
- A cationic surfactant containing a spiropyrane unit is prepared exhibiting a dual-responsive adjustability of its surface-active characteristics. The switching mechanism of the system relies on the reversible conversion of the non-ionic spiropyrane (SP) to a zwitterionic merocyanine (MC) and can be controlled by adjusting the pH value and via light, resulting in a pH-dependent photoactivity: While the compound possesses a pronounced difference in surface activity between both forms under acidic conditions, this behavior is suppressed at a neutral pH level. The underlying switching processes are investigated in detail, and a thermodynamic explanation based on a combination of theoretical and experimental results is provided. This complex stimuli-responsive behavior enables remote-control of colloidal systems. To demonstrate its applicability, the surfactant is utilized for the pH-dependent manipulation of oil-in-water emulsions.
MetadatenAuthor details: | Martin ReifarthORCiDGND, Marek BekirORCiD, Alain M. BapolisiORCiD, Evgenii TitovORCiDGND, Fabian Nusshardt, Julius Nowaczyk, Dmitry GrigorievORCiDGND, Anjali SharmaORCiDGND, Peter SaalfrankORCiDGND, Svetlana SanterORCiDGND, Matthias HartliebORCiD, Alexander BökerORCiDGND |
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DOI: | https://doi.org/10.1002/anie.202114687 |
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ISSN: | 1433-7851 |
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ISSN: | 1521-3773 |
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Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/35178847 |
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Title of parent work (English): | Angewandte Chemie : a journal of the Gesellschaft Deutscher Chemiker ; International edition |
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Subtitle (English): | investigations on Its switching behavior and remote control over emulsion stability |
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Publisher: | Wiley-VCH |
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Place of publishing: | Weinheim |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2022/02/18 |
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Publication year: | 2022 |
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Release date: | 2023/12/07 |
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Tag: | Dual-Responsiveness; Manipulation of Emulsion Stability; Spiropyrane; Surfactant; Switchable Surfactants; pH-Dependent Photoresponsivity |
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Volume: | 61 |
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Issue: | 21 |
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Article number: | e202114687 |
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Number of pages: | 10 |
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Funding institution: | European Research Council (ERC) [648365]; German research council (DFG); [471323994]; DFG (Emmy-Noether-Program) [HA 7725/2-1]; University of; Potsdam; DFG [454020933]; Projekt DEAL |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
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Peer review: | Referiert |
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Publishing method: | Open Access / Hybrid Open-Access |
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License (German): | CC-BY - Namensnennung 4.0 International |
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