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Citation: XIAO Hai-Bo, LENG Bing, TIAN He. Synthesis of A Triphenylamine-Spirosilabifluorene Alternating Copolymer[J]. Chinese Journal of Applied Chemistry, ;2006, 23(2): 140-143. shu

Synthesis of A Triphenylamine-Spirosilabifluorene Alternating Copolymer

1.
Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237

Corresponding author: TIAN He,
Received Date: 19 April 2005
Available Online: 30 June 2005
Fund Project:

A novel triphenylamine-spirosilabifluorene alternating copolymer was synthesized by copolymerization of 2,2'-dibromo-9,9'-spiro-9-silabifluorene and triphenylamine diboronic acid via a palladium-catalyzed Suzuki coupling reaction.The dibromo monomer was synthesized in five steps starting from 1,2-dibromobenzene.Triphenylamine diboronic acid was obtained from triphenylamine in three steps.The structures of the monomers and the copolymer were verified by means of ¹H NMR,MS,and FTIR.The molecular weight of the polymer was determined by gel permeation chromatography(GPC) analysis against polystyrene standards.The polymer has a M_n of 7 014,a M_w of 9 577,with a polydispersity of 1.36.The introduction of a spiro-structure leads to a high thermal stability(T_g=158.22℃) and a good solubility of the polymer in common organic solvents.The electrochemical behavior of the polymer was investigated with cyclic voltammetry.The reversible electrochemical oxidation and low ionization potential(-5.47eV,which is very close to the data reported for triphenylamine) suggest that the polymer might have potential application as a hole transport material for polymer LEDs.
- spirosilabifluorene,
- triphenylamine,
- copolymer,
- synthesis
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