Naphthotetrathiophene-Based Helicene-Like Molecules: Synthesis and Photophysical Properties

Two
novel helicene-like molecules based on naphthotetrathiophene
are successfully synthesized. All target molecules and intermediates
are characterized by 1H NMR, 13C NMR, IR, and
HRMS. Their electrochemical and photophysical properties are studied.
The configurations of the molecules are optimized by DFT quantum calculations
and UV–vis behaviors are also predicted to further understand
the origin of different absorption bands. We believe the current work
illustrated an efficient way for the design and synthesis of sophisticated
structures with naphthotetrathiophene as building blocks.