Synthesis, structure, and evaluation of the effect of multiple stacking on the electron-donor properties of pi-stacked polyfluorenes.
A versatile synthesis of pi-stacked polyfluorenes is described. These polyfluorenes retain their cofacial conformations both in solution and in the solid state as was judged by NMR spectroscopy and X-ray crystallography. The experimental electron-detachment energies of F1-F4 showed linear correlations with the quantity 1/n, where n is the number of fluorene moieties. These correlations allowed the estimation of the vertical ionization potential (IP) of 7.10 eV and the oxidation potential (Eox) of 0.97 V versus SCE for the multiply stacked polyfluorene donor with an infinite number of fluorene moieties. These observations with pi-stacked polyfluorenes may prove to be highly relevant to the electron-transport phenomenon observed in DNA through pi-stacked bases.
Rathore
Rajendra
R
Department of Chemistry, Marquette University, PO Box 1881, Milwaukee, Wisconsin 53201-1881, USA. rajendra.rathore@marquette.edu
Abdelwahed
Sameh H
SH
Guzei
Ilia A
IA
D005449:Fluorenes / Q000138:chemical synthesis / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry
D005449:Fluorenes; D011108:Polymers