Welcome to the Institute of Chemistry

M. Reifarth, M. Bekir, A. M. Bapolisi, E. Titov, F. Nußhardt, J. Nowaczyk, D. Grigoriev, A. Sharma, P. Saalfrank, S. Santer, M. Hartlieb, A. Böker
A Dual pH- and Light-Responsive Spiropyran-Based Surfactant: Investigations on Its Switching Behavior and Remote Control over Emulsion Stability
Angw. Chem. Int. Ed. 2022, 61, e202114687
DOI: 10.1002/anie.202114687
A cationic surfactant containing a spiropyran 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 spiropyran (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.
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Greeting from the managing director Prof. Dr. H. Schlaad

Welcome to the WEB-SITE of Chemistry at the University of Potsdam. We invite you to get acquainted with our research and teaching expertise, the outstanding equipment of our laboratories and already existing national and international collaborations. You find us in Wissenschaftspark Golm. If you would like to study Chemistry at the University of Potsdam or if you want to benefit from our research activities and collaborate with us, you are cordially welcome.
 
Prof. Dr. Helmut Schlaad
 
 

Research Groups

Analytical Chemistry

Prof. Heiko Möller - Analytical Chemistry

Inorganic Chemistry

Dr. Claudia Pacholski - Inorganic Chemistry

Prof. Andreas Taubert - Supramolecular Chemistry

Didactics of Chemistry

Prof. Amitabh Banerji - Didactics of Chemistry

Organic Chemsitry

Prof. Bernd Schmidt - Organic Syntheses

Prof. Pablo Wessig - Bioorganic Chemistry

Prof. Torsten Linker - Organic Chemistry

Physical and Theoretical Chemsitry

JProf. Henrike Müller-Werkmeister - Physical Chemistry

Prof. Andreas Taubert (komm.) - Physical Chemistry

Prof. Ilko Bald - Hybrid Nanostructures

Prof. Peter Saalfrank - Theoretical Chemistry

Colloidal and Polymer Chemistry

Prof. Helmut Schlaad - Polymer Chemistry

Prof. Joachim Koetz - Colloidal Chemistry

Joint professors

Prof. Alexander Böker - IAP

Prof. André Laschewsky - IAP

Prof. Andreas Lendlein - HZG

Prof. Yan Lu - HZB

Research groups and habilitation candidates

apl. Prof. Judith Schicks - Multiphase Systems

apl. Prof. Michael U. Kumke - Optical Sensor Technology and Spectroscopy

apl. Prof. Tillmann Klamroth - Computational Chemistry

Dr. Matthias Hartlieb - Polymeric Biomaterials

PD Dr. Jolanda Hermanns - Didactics of Chemistry

Honorary Professors

Prof. Markus Antonietti - MPIKG

Prof. Peter Seeberger - MPIKG

Retired Professors