Enhancing the emission of hexa-peri-hexabenzocoronene-containing polynorbornene via electron donating, unsymmetric constitution and solvent effects

Abstract

Hexa-peri-hexabenzocoronene-containing hydrogenated polynorbornene dispersion showed an intensive emission of the 0–0 transition (465 nm) and excellent dispersibility.

Coronenes, Benzocoronenes and Beyond: Modern Aspects of Their Syntheses, Properties, and Applications

“…The HBC also acted as a conjugating core in a hybrid series with benzo[1,2‐ b ;3,4‐ b ]dithiophene as a donor, thieno[3,4‐ c ]pyrrole‐4,6‐dione as an acceptor [244] . Donor‐acceptor interactions were even observed between covalently attached HBC and hexaphenylbenzene, resulting good electroluminescent properties [245] . In addition, hybrid systems featuring peri ‐HBC donor and fullerene acceptor achieved external quantum efficiency of 30% in solar cells [246] .…”

Spiro-fused bis-hexa-peri-hexabenzocoronene

“…2a), which is attributed to a reduced symmetry of SB-HBC. 40 Furthermore, the fluorescence quantum yield of SB-HBC was determined to be 0.063, which is higher than the reported values of HBC-tBu (F F = 0.030) and other alkyl substituted HBC derivatives. 41 In contrast to the doubly degenerated HOMO and LUMO of unsubstituted HBC, DFT calculations demonstrated the non-degenerate frontier molecular orbitals (HOMO and LUMO) of SB-HBC, with the electron density shared over the spiro bridge (Fig.…”

Synthesis of Well‐Defined Poly(norbornene) Containing Carbon Nanodots by Controlled ROMP

“…Despite the versatility of the ROMP, its synthetic application for the production of polymers with PAH moieties has been rarely investigated. For instance, Liaw et al reported the synthesis of a polymer containing hexa‐ peri ‐hexabenzocoronene (HBC) by ROMP [Scheme (a)] . However, two postmodifications of the poly(norbornene) (PNB) with hexaphenylbenzene (HPB) were required.…”