T. Sajoto, S. P. Tiwari, Huifang Li
Feb 28, 2012
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0
Influential Citations
24
Citations
Journal
Polymer
Abstract
Abstract A series of conjugated polymers has been synthesized by Sonogashira coupling of N,N ′-bis(2-octyldodecyl)-2,6-dibromonaphthalene-1,4,5,8-bis(dicarboximide) and four para -diethynylbenzene derivatives: 1,4-diethynyl-2,5-dihexadecyloxybenzene, 1,4-diethynyl-2,5-bis(2-octyldodecyloxy) benzene, 1,4-bis(2-ethylhexyl)-2,5-diethynylbenzene, 1,4-diethynyl-2,5-bis(trifluoromethyl)benzene. The polymers display absorption maxima at wavelengths ranging from 530 nm to 654 nm with molar absorptivities ranging from ca. 4 to 7 × 10 4 M −1 cm −1 . The peak reduction potentials, determined by differential pulse voltammetry, for polymer films varied from −0.93 to −1.14 V vs. ferrocenium/ferrocene with the trifluoromethyl-substituted derivative being the most readily reduced. All four polymers exhibited electron transport characteristics in bottom-gate/top-contact field-effect transistors, showing average electron mobility values ranging from 1.4 × 10 −4 to 3.7 × 10 −3 cm 2 V −1 s −1 .