Citation: Er Fu Huo, Jiang Yong Wu, Bao Feng Song, Ying Li, Qing Jiang, Ming Gui Xie. Synthesis and characterization of novel low band-gap polymers containing squaraine units[J]. Chinese Chemical Letters, ;2007, 18(12): 1531-1534. doi: 10.1016/j.cclet.2007.09.037 shu

Synthesis and characterization of novel low band-gap polymers containing squaraine units

a College of Chemistry, Sichuan University, Chengdu 610064, China;
b Beijing Research Institute of Chemical Industry, SINOPEC, Beijing 100013, China

Received Date: 2 July 2007

Fund Project: The authors gratefully thank the financial supports of the Key Foundation of Education Ministry of China (No.105142), the specialized research fund for the Doctoral Program of Higher Education (SRFDP)(No.20030610069) and the Fund of Science and Technology for Youth, Sichuan Province (No.03SQ04).

Novel conjugated polymers based on squaric acid having 2, 5-Bis[(E)-N-alkylpyrrol-2-ylvinyl]-3-alkylthiophene (PVTVP) unit in the main chain were successfully synthesized in good yields through polycondensation reaction. Their molecular structures were characterized by FT-IR and ¹H NMR. They have good solubility in common organic solvents, good thermal stability by thermal gravimetric analysis and high molecular weights. Their optical properties were investigated by UV-vis absorption spectra in CH₂Cl₂ solution, the results indicated all these compounds showed broad and strong spectral responses from 200 nm to 900 nm, suggesting their potential for application as organic plastic solar cells.
- Conjugated polymers,
- Squarain,
- Plastic solar cells
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