Steric pressure in heteropentacenes modulates the photophysical properties - a molecular design strategy for functional materials.

ABSTRACT: Discovering the versatile ability of environment-independent solution and solid-state emission (SSSE) enabled new possibilities of fine-tuning photophysical properties, targeting specific organelles, or developing remarkable materials. Herein, we report an unprecedented design concept for SSSE by employing the "magic methyl" effect in a series of alkylated heteropentacyclic luminophores R8, Y8, and G8. Implementing an increasing amount of ortho-methyl groups influences the vertical electronic transitions, tuning the emission colors from red over yellow to green and inverting the preferred state of luminescence from solution to solely the solid-state or even both. An in-depth analysis was performed using X-ray diffractometric structure elucidation, packing analysis and density functi

SUBMITTER: Huber A 

PROVIDER: S-EPMC12326327 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature