Blue Emitting Star-Shaped and Octasilsesquioxane-Based Polyanions Bearing Boron Clusters. Photophysical and Thermal Properties.

ABSTRACT: High boron content systems were prepared by the peripheral functionalisation of 1,3,5-triphenylbenzene (TPB) and octavinylsilsesquioxane (OVS) with two different anionic boron clusters: closo-dodecaborate (B₁₂) and cobaltabisdicarbollide (COSAN). TPB was successfully decorated with three cluster units by an oxonium ring-opening reaction, while OVS was bonded to eight clusters by catalysed metathesis cross-coupling. The resulting compounds were spectroscopically characterised, and their solution-state photophysical properties analysed. For TPB, the presence of COSAN dramatically quenches the fluorescence emission (λ_em = 369 nm; Φ_F = 0.8%), while B₁₂-substituted TPB shows an appreciable emission efficiency (λ_em = 394 nm; Φ_F</

SUBMITTER: Cabrera-Gonzalez J 

PROVIDER: S-EPMC7179457 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature