Reactive & Functional Polymers, Vol.68, No.8, 1266-1271, 2008
Synthesis of poly(N-vinylcarbazole) having a C-60 end-group by grafting poly(N-vinylcarbazolyl)lithium onto C-60
The grafting reaction of poly(N-vinylcarbazolyl)lithium (PNVCLi) with tert-butyl lithium onto fullerene-C-60 (C-60) was examined to explore the possibility of preparing new materials for effective photovoltaic cells. When the molar ratio of C-60/Li was over four, the grafting reaction products obtained were completely soluble in tetrahydrofuran. The number-average molecular weight of the grafting reaction products obtained was greater than that of the respective parent PNVCs, indicating the formation of PNVC with a C-60 end-group. Gel permeation chromatography and C-13 NMR analyses showed that the product of the grafting reaction was C-60 bonded to PNVC and t-butyl groups. UV/vis and PL spectra suggested that this PNVC may be useful for preparing effective photovoltaic cells. (C) 2008 Elsevier Ltd. All rights reserved.
Keywords:anionic polymerization;fullerenes;functionalization of polymers;grafting reaction;poly(N-viny[carbazolyl)lithium