Faculty Sponsor
Jinjia Xu
Final Abstract for URS Program
Molecular electronics explores the use of individual molecules as functional components in nanoscale electronic devices. In this project, fluorenone-based π-conjugated molecules including 9,9'-bifluorenylidene-S and triphenylamine-substituted derivatives were synthesized to investigate structure-property relationships relevant to molecular charge transport. The synthesized compounds were obtained in 13% and 27% yield respectively. ¹H NMR spectroscopy confirms characteristic aromatic resonances in the 7-9 ppm region consistent with the conjugated framework. UV–Vis spectroscopy reveals absorption maxima at 459 nm and 470 nm, indicating extended π-conjugation and donor-acceptor effects. Single-crystal X-ray diffraction confirms the structure of 9,9'-bifluorenylidene-S, which crystallizes in the monoclinic system (space group P2₁/c). In molecular electronics research, scanning tunneling microscope break junction (STM-BJ) methods are commonly used to investigate electron transport through single molecules by forming metal–molecule–metal junctions. These results establish the structural and electronic properties of bifluorenylidene-based systems for applications in single-molecule conductance studies.
Presentation Type
Visual Presentation
Document Type
Article
Included in
Analytical Chemistry Commons, Materials Chemistry Commons, Organic Chemistry Commons, Physical Chemistry Commons