Synthesis and characterizatoin of polymers having fluorenone derivatives

Summary form only given. It is well known that fluorenone derivatives have good electron transport ability due to low LUMO. However, low molecular weight compounds have poor mechanical properties and they easily crystallize and decrease the electron transport ability. We have prepared a new polymer having fluorenone units on the side chain- poly(4-vinylbenzyl 9-dicyanomethylenefluorene-4-carboxylate) and measured electrical porperties. The momomer was prepared from 9-dicyanomethylenefluorene-4-carboxylic acid and p-chloromethyl styene, and was polymerized by conventional radical polymerization in solution. Polymer was obtained with 61% yield and as a yellow powder. The polymer was soluble in organic solvent such as THF, chloroform and methylchloride. The number average molecular weight was determined to be 8,200 by GPC using a calibration curve of standard polystylene. The structures of the resulting polymer were confirmed by /sup 1/H-, /sup 13/C-NMR and IR spectra. Polymer in THF solution showed a UV absorption maximum(/spl lambda/max) at 351.25nm. The polymer film showed two reversible redox potentials at -0.51V,-1.04V(oxidation) and -0.62V,-1.15V(reduction). Further detailed studies will be presented at the poster session.