TY  - JOUR
A1  - Görl, Daniel
A1  - Soberats, Bartolome
A1  - Herbst, Stefanie
A1  - Stepanenko, Vladimir
A1  - Würthner, Frank
T1  - Perylene bisimide hydrogels and lyotropic liquid crystals with temperature-responsive color change
JF  - Chemical Science
N2  - The self-assembly of perylene bisimide (PBI) dyes bearing oligo ethylene glycol (OEG) units in water affords responsive functional nanostructures characterized by their lower critical solution temperature (LCST). Tuning of the LCST is realized by a supramolecular approach that relies on two structurally closely related PBI–OEG molecules. The two PBIs socially co-assemble in water and the resulting nanostructures exhibit a single LCST in between the transition temperatures of the aggregates formed by single components. This permits to precisely tune the transition from a hydrogel to a lyotropic liquid crystal state at temperatures between 26 and 51 °C by adjusting the molar fraction of the two PBIs. Owing to concomitant changes in PBI–PBI interactions this phase transition affords a pronounced color change with “fluorescence-on” response that can be utilized as a smart temperature sensory system.
KW  - perylene bisimide hydrogels
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-162459
VL  - 7
IS  - 11
ER  -