Abstract
A series of polypeptides bearing biphenyl mesogenic side-chains and oligo-ethylene-glycol (OEG) tails (PPLG n -g-BPOEG m , n = 26 and 63, m = 2, 3, and 7) has been synthesized via a 1,3-dipolar cycloaddition with quantitative grafting density. FTIR results revealed that the polypeptides adopted highly stable α-helix in the temperature range of 25–200 °C. DSC, POM and WAXS analysis revealed that PPLG n -g-BPOEG m (m ≤ 3) samples with short OEG tail length showed two main phase transitions including crystal to liquid crystalline (smectic C, SmC) phase transition and the melting transition of crystalline E-phase, while PPLG n -g-BPOEG7 with longer OEG tail length (m = 7) exhibited the melting transitions without the formation of liquid crystalline phase.
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This work was financially supported by the National Natural Science Foundation of China (No. 21204075), Hunan Provincial Natural Science Foundation of China (No. 13JJ6042) and **angtan University start-up fund (No. 12QDZ06).
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Yuan, Ql., Liu, Wj., Deng, Y. et al. Synthesis, characterization and phase behaviors of polypeptides bearing biphenyl mesogens and oligo-ethylene-glycol tails. Chin J Polym Sci 33, 1150–1161 (2015). https://doi.org/10.1007/s10118-015-1665-4
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DOI: https://doi.org/10.1007/s10118-015-1665-4