Construction of oriented thin film via C-F...H-C intermolecular interaction

摘要

Highly ordered spin-coating films of a conjugated molecule, trans-2,3,4,5,6-pentafluorostilbene were fabricated on quartz substrate by making use of the C-F--H noncovalent intermolecular interaction, whose strength is as high as that of hydrogen bond. The C-F--H-O interactions are strong enough to drive the molecules in the foundation layer erecting over the substrate and the C-F--H-C interactions between adjacent molecules maintain such a molecular orientation in the subsequent layers. X-diffraction patterns and polarized raman spectral data confirmed the ordered structure in the spin-coating films.