Single-component TADF gels: study of the positional isomer effect on gelation and morphological effect on conductivity.

The gelation of two TADF positional isomers, 4BPy- m DTC and BPy-DTC, was explored. Among these emitters, only 4BPy- m DTC forms stable organogels due to the optimized intermolecular interactions. Interestingly, the morphology of the gel can be tuned from fibre to fettuccine by changing the solvents. The electrical conductivity of the self-assembly can also be increased from 8.05 × 10 -4 S m -1 to 6.05 × 10 -3 S m -1 by tuning the morphology.