COA of Formula: C5H6BNO2In 2019 ,ãFacile color tuning of thermally activated delayed fluorescence by substituted ortho-carbazole-appended triarylboron emittersã?was published in Dyes and Pigments. The article was written by Kumar, Ajay; Oh, Jihun; Kim, Juhee; Jung, Jaehoon; Lee, Min Hyung. The article contains the following contents:
We report the facile tuning of the emission color of thermally activated delayed fluorescence (TADF) emitters based on an ortho-carbazole-appended triarylboron. A series of ortho-carbazole-appended triarylboron compounds (2-7) are prepared by introducing various electron-accepting substituents, such as Ph, pyridyl, pyrimidyl, diphenylphosphine oxide, cyano, and dimesitylboryl groups, to the phenylene ring of the dimesitylphenylboryl (PhBMes2) acceptor moiety in the parent ortho-carbazole-appended triarylboron (CzoB, 1). The X-ray crystal structure of the cyano-substituted compound 6 confirms the twisted connectivity between the Cz and phenylene rings. All the compounds exhibit strong TADF (ΦPL = 48-93% in toluene) with large delayed portions. In particular, the emission bands gradually undergo bathochromic shifts from blue (λPL = 463 nm for 1) to greenish yellow (λPL = 532 nm for 7) depending on the electron-accepting substituents. Electrochem. studies show that the greater stabilization of the LUMO level compared to the HOMO is responsible for the red shifts of the emission. Theor. studies further support the observed bathochromic shifts in the emission, as well as the small energy splittings (ΔEST) between the excited singlet and triplet states that afford the efficient TADF. In the experimental materials used by the author, we found Pyridin-3-ylboronic acid(cas: 1692-25-7COA of Formula: C5H6BNO2)
Pyridin-3-ylboronic acid(cas: 1692-25-7) belongs to pyridine. Pyridines, quinolines, and isoquinolines have found a function in almost all aspects of organic chemistry. Pyridine has found use as a solvent, base, ligand, functional group, and molecular scaffold. As structural elements, these moieties are potent electron-deficient groups, metal-directing functionalities, fluorophores, and medicinally important pharmacophores. COA of Formula: C5H6BNO2