文献类型：期刊文献

英文题名：Poly(N-vinylcarbazole) chemically modified graphene oxide

作者：Zhang, Bin[1]; Chen, Y.U.[1]; Zhuang, Xiaodong[1]; Liu, Gang[2]; Yu, B.[1]; Kang, En-Tang[2]; Zhu, Jinhui[1]; Li, Yongxi[1]

机构：[1] Department of Chemistry, Key Laboratory for Advanced Materials, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China; [2] Department of Chemical and Biomolecular Engineering, National University of Singapore, 10 Kent Ridge, 119260 Singapore, Singapore

年份：2010

卷号：48

期号：12

起止页码：2642

外文期刊名：Journal of Polymer Science, Part A: Polymer Chemistry

收录：EI(收录号：20102312982526)

语种：英文

外文关键词：Redox reactions - Quenching - Nanosheets - Graphene

摘要：A new soluble donor-acceptor type poly(N-vinylcarbazole)-covalently functionalized graphene oxide (GO-PVK) has been synthesized by reaction of DDAT (S-1-dodecyl-S′-(α-α′-dimethyl-α″- aceticacid)trithioearbonate)-PVK with GO-toluene-2,4-diisoeynate. The incorporation of sufficient amount of PVK chains makes the modified GO nanosheets readily dispersible in organic solvents. The resulting material exhibits an enhanced solubility of 10 mg/mL in organic solvents. Covalent grafting of PVK onto the edge and surface of GO nanosheets did not change the car bazo le absorption in the ultraviolet region, but substantially reduced the absorption intensity of GO in the visible region. The intensity of the emission band of GO-PVK at 437 nm was a little bit quenched when compared with that of DDAT-PVK, suggesting intramolecular quenching from PVK to GO. Such intramolecular quenching process may involve energy or electron transfer between the excited singlet states of the PVK moiety and the GO moiety. The HOMO/LUMO values and the energy bandgap of GO-PVK experimentally estimated by the onset of the redox potentials are 5.60, 3.58, and 2.02 eV, respectively. ? 2010 Wiley Periodicals, Inc.