Polyfluorenes with on‐chain dibenzoborole units—Synthesis and anion‐induced photoluminescence quenching

Dibenzometallacyclopentadienes, boroles and selected transition metal and main group heterocyclopentadienes: Synthesis, catalytic and optical properties

“…Apparently, the coordination to the boron center interrupts the conjugation in such a way that the LUMO is then mainly localized at the biphenyl rings with very little contribution of the central borole ring. The anion receptor properties in THF solution as well as in thin films of 9-borafluorenecontaining polymers have been evaluated via photoluminescence quenching measurements by Scherf et al for future sensing applications [104].…”

Doping the Backbone of π‐Conjugated Polymers with Tricoordinate Boron: Synthetic Strategies and Emerging Applications

“…Bonifácio et al. investigated a further polycyclic building block with antiaromatic character, that is, 9‐borafluorene (dibenzoborole), as a component for conjugated polymers (Scheme ) . They synthesized the random copolymer 38 by Yamamoto coupling of 2,7‐dibrominated borafluorene and fluorene comonomers in 1:9 molar ratio.…”

“…The borafluorene‐containing polymers 38 (Scheme ) and 39 and 40 (Scheme ) by Bonifácio and Rupar, respectively, were explored for sensory applications as well. 38 showed efficient fluorescence quenching in the presence of fluoride or cyanide .…”

Polyfluorenes

“…The PL spectra change from well-structured LE emission (typical for PF8) in low polar toluene to a structureless redshifted CT emission in more polar chloroform. [96]. This polymer can respond to fluoride, cyanide, and iodide anions.…”