Synthesis, Characterization and Phase Behaviors of Polypeptides Bearing Biphenyl Mesogens and Oligo-Ethylene-Glycol Tails

Qiu-lin Yuan; Wen-jun Liu; Yong Deng; Ying Ling; Hao-yu Tang

doi:10.1007/s10118-015-1665-4

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Synthesis, Characterization and Phase Behaviors of Polypeptides Bearing Biphenyl Mesogens and Oligo-Ethylene-Glycol Tails

PAPER | Updated：2021-06-21

- Synthesis, Characterization and Phase Behaviors of Polypeptides Bearing Biphenyl Mesogens and Oligo-Ethylene-Glycol Tails
- Chinese Journal of Polymer Science Vol. 33, Issue 8, Pages: 1150-1161(2015)
- Affiliations：
  
  Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province, College of Chemistry, Xiangtan University, Xiangtan 411105, China
- Author bio：
  
  **Hao-yu Tang (唐浩宇), E-mail: htang@xtu.edu.cn
- Funds：
- DOI：10.1007/s10118-015-1665-4
  CLC：
- Received：12 December 2014，
  
  Revised：2015-01-03，
  
  Accepted：05 January 2015，
  
  Published：2015-08
- Accepted：
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Qiu-lin Yuan, Wen-jun Liu, Yong Deng, et al. Synthesis, Characterization and Phase Behaviors of Polypeptides Bearing Biphenyl Mesogens and Oligo-Ethylene-Glycol Tails[J]. Chinese Journal of Polymer Science, 2015, 33(8): 1150-1161.
DOI：

Qiu-lin Yuan, Wen-jun Liu, Yong Deng, et al. Synthesis, Characterization and Phase Behaviors of Polypeptides Bearing Biphenyl Mesogens and Oligo-Ethylene-Glycol Tails[J]. Chinese Journal of Polymer Science, 2015, 33(8): 1150-1161. DOI： 10.1007/s10118-015-1665-4.

摘要

Abstract

A series of polypeptides bearing biphenyl mesogenic side-chains and oligo-ethylene-glycol (OEG) tails (PPLG

-BPOEG

= 26 and 63

= 2

and 7) has been synthesized

via

a 1

3-dipolar cycloaddition with quantitative grafting density. FTIR results revealed that the polypeptides adopted highly stable

-helix in the temperature range of 25-200 °C. DSC

POM and WAXS analysis revealed that PPLG

-g

-BPOEG

(

≤ 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

-g

-BPOEG7 with longer OEG tail length (

= 7) exhibited the melting transitions without the formation of liquid crystalline phase.

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