Stereospecific Synthesis and Photophysical Properties of Propeller-Shaped C90 H48 PAH.

Fangyuan ZhangEvripidis MichailFridolin SaalAna-Maria KrausePrince Ravat

Published in: Chemistry (Weinheim an der Bergstrasse, Germany) (2019)

Herein, we have synthesized an enantiomerically pure propeller-shaped PAH, C90 H48 , possessing three [7]helicene and three [5]helicene subunits. This compound can be obtained in gram quantities in a straightforward manner. The photophysical and chiroptical properties were investigated using UV/Vis absorption and emission, optical rotation and circular dichroism spectroscopy, supported by DFT calculations. The nonlinear optical properties were investigated by two-photon absorption measurements using linearly and circularly polarized light. The extremely twisted structure and packing of the homochiral compound were investigated by single-crystal X-ray diffraction analysis.

Keyphrases

atomic force microscopy
high resolution
density functional theory
high speed
solid state
single molecule
polycyclic aromatic hydrocarbons
molecular dynamics
gram negative
electron microscopy
crystal structure
molecular dynamics simulations
living cells
mass spectrometry
multidrug resistant