Citation: Wei Zhang, Zheng Wang, Yu Sheng Tang, Zhi Gang Xu, Ying Li, Qing Jiang. Synthesis and properties of novel low band-gap polymers beating squaraine units[J]. Chinese Chemical Letters, ;2010, 21(2): 245-248. doi: 10.1016/j.cclet.2009.09.003 shu

Synthesis and properties of novel low band-gap polymers beating squaraine units

College of Chemistry, Sichuan University, Chengdu 610064, China

Received Date: 23 June 2009

Fund Project: This work was supported by the key foundation of education ministry of China (No. 20070610053) and Sichuan Province Foundation for Youths (No. 2008JY0050). The authors also acknowledge the Analytical & Testing Center of Sichuan University for the NMR measurements.

Novel main-chain-conjugated poly(carbazol-alt-squaraine)and poly(dipyridyl-alt-squaraine)were successfully synthesized through direct polycondensation of 9-(2-ethylhexyl)carbazole-bridged or dipyridyl-bridged bispyrrole and squaric acid.The structures and properties of the polymers were characterized using ¹H NMR,FT-IR,UV-vis and cyclic voltammetry.Both polymers exhibit excellent solubility in common organic solvents and good thermal stability.Their UV-vis absorption spectra indicated the polymers have broad and strong spectral responses from 200 nm to 900 nm,which reveals a low optical band gap around 1.38 eV,suggesting that they may be promising candidates for organic solar cells.
- Squaraine,
- Polymer,
- Synthesis,
- Low band gap,
- Organic solar cell material
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