1. Synthesis and Characterization of Novel Donor/Acceptor
Molecules Based on Propellanes: A Probe of Nonclassical Conjugation
Frankie Ann McCormick, Department of Chemistry, Northern Michigan University
Study provides the first experimental evidence for charge transfer between donor and acceptor groups linked by 1,3-diethynylpropellanes.
UV absorption and fluorescence spectra indicate significant interaction through the propellane spacer—the molecules exhibit substantial charge transfer as seen from the bathochromic shift of the emission with increasing solvent polarity.
Potential applications of these molecules include optics, molecular electronics, and energy transfer.
Figure 1. UV Absorption Spectra of 2 in Cyclohexane.
Figure 2. Normalized emission spectra of 1 in solvents of
different polarity. (Excitation at 270 nm)