1.
Chem Commun (Camb)
; 58(51): 7188-7191, 2022 Jun 23.
Artigo
em Inglês
| MEDLINE
| ID: mdl-35670546
RESUMO
We report a boron dipyrromethene that is chiral at boron and carbon (B*C*-BODIPY) and accessible through a two-pot, one-step synthesis-an interrupted Knoevenagel condensation. The electronic circular dichroism spectra of chiral high performance liquid chromatography-resolved enantiomers show clear Cotton effects (â£gabs⣠⼠2.0 × 10-4) in the visible region, suggesting efficient chirality induction to the otherwise achiral BODIPY. The dye's unusually weak fluorescence (Φfl < 0.01) is attributed partly to vibrational relaxations, as revealed by viscosity experiments, and partly to probable intersystem crossing that may be facilitated by the reduced symmetry of the bent-shaped molecular geometry.