Phosphahelicenes: From Chiroptical and Photophysical Properties to OLED Applications.

Herein, the experimental physicochemical and chiroptical properties of a series of phosphahelicenes are reported, focusing on their UV/Vis absorption, luminescence, electronic circular dichroism, optical rotations, and circularly polarized luminescence. Furthermore, detailed analysis of absorption and ECD spectra performed with the help of quantum-chemical calculations allowed us to highlight general features of these helicenic phosphines. Finally, due to well-suited electrochemical properties and thermal stability, the systems were successfully used as emitters in organic light-emitting diodes.

C-H activation of 2,4,6-triphenylphosphinine: synthesis and characterization of the first homoleptic phosphinine-iridium(III) complex fac-[Ir(C

Access to homoleptic phosphinine-based coordination compounds of d(6) metals has so far remained elusive. We report here on the preparation and full characterization of the first homoleptic phosphinine-iridium(III) complex, obtained by C-H activation of 2,4,6-triphenylphosphinine with [Ir(acac)3]. This result opens up new perspectives for the implementation of such aromatic heterocycles in more applied research fields.

Benzofuran-fused phosphole: synthesis, electronic, and electroluminescence properties.

A synthetic route to novel benzofuran-fused phosphole derivatives 3-5 is described. These compounds showed optical and electrochemical properties that differ from their benzothiophene analog. Preliminary results show that 4 can be used as an emitter in OLEDs, illustrating the potential of these new compounds for opto-electronic applications.