2 research outputs found
Synthesis and Properties of the 5,10,15-Trimesityltruxen-5-yl Radical
The synthesis of a long-lived, truxene-based radical that is highly delocalized and exhibits a narrow EPR absorption is reported. The radical is stable for multiple hours in a solution exposed to air and remains for months in the solid state under inert gas. Characterization and properties are discussed
Synthesis and Electronic Properties of Fluoreno[2,1‑<i>a</i>]fluorenedione and Fluoreno[1,2‑<i>a</i>]fluorenedione
The
[2,1-<i>a</i>]- and [1,2-<i>a</i>]-isomers
of fluorenofluorenedione have been synthesized via intramolecular
Friedel–Crafts acylations. DFT calculations indicate that the
[1,2-<i>a</i>]-isomer adopts a twisted, helical <i>C</i><sub>2</sub>-symmetric structure and that its protonated
form is the thermodynamic product of the Friedel–Crafts acylation
in hot sulfuric acid. Absorption spectroscopy and cyclic voltammetry
measurements provide experimental estimations of frontier molecular
orbital energy levels, which are reported and discussed