Synthesis and properties of a pyrazoline-containing hyperbranched polyarylene

POLY 178

Han Peng, hpeng@scut.edu.cn1, Na Zhang, zhangna001@yahoo.com.cn1, and Ben Zhong Tang, tangbenz@ust.hk2. (1) Institute of Material Science and Engineering, South China University of Technology, Guangzhou, 510640, China, (2) Department of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
New aromatic diyne 3,5-Bis-(4-ethynyl-phenyl)-1-phenyl-4,5-dihydro-1H-pyrazole (1) is synthesized by mulitstep reactions. Copolymerizations of 1 with 1-octyne (2) are effected by CpCo(CO)2 in toluene, producing hyperbranched polyarylenes with high molecular weights in high isolation yields. The structures and properties of the resultant polymers are characterized and evaluated by IR, UV, NMR, TGA, and fluorescence analyses. These polymers are completely soluble in such common solvents as toluene, THF, chloroform, and dichloromethane. The polymers show satisfactory thermal stability. Upon photoexcitation, the DCM solutions of all polymers emit blue light of ~460 nm.
 

General Papers: Functional Materials
6:00 PM-8:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Polymer Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007