Stereoisomer-Independent Stable Blue Emission in Axial Chiral Difluorenol

Bulky conjugated molecules with high stability are the prerequisite for the overall improvement of performance in wide-bandgap semiconductors. Herein, a chiral difluorenol, 2,2′-(9,9′-spirobi[fluorene]-2,2′-diyl)bis(9-(4-(octyloxy)phenyl)-9H-fluoren-9-ol) (DOHSBF), is set as a desirable model to reveal the stereoisomeric effects of wide-bandgap molecules toward controlling photophysical behavior and improving thermal and optical stability. Three diastereomers are obtained and elucidated by NMR spectra. Interestingly, the effect of modifying the stereo-centers is not observed on optical properties in solutions, pristine films, or post-treated film states. All three diastereomers as well as the mixture exhibit excellent spectral stability without undesirable green emission. Therefore, this stereoisomer-independent blue-emitting difluorenol will be a promising candidate for next-generation wide-bandgap semiconductors that would have extensive application in organic photonics.

Donor–acceptor substituted 1,8-naphthalimides: design, synthesis, and structure–property relationship

Research on developing new donor–acceptor (D–A) substituted 1,8-naphthalimide (NI) based molecular systems is a rapidly growing research are due to their wide-ranging applications in the field of organic photonics and electronics.

Chiral organic photonics: self-assembled micro-resonators for an enhanced circular dichroism effect in the non-linear optical signal

Enantiomeric R and S type organic whispering-gallery-mode (WGM) optical micro-cavities display an enhanced CD-NLO effect due to increased light–matter interaction.