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Dynamic behavior and selective adsorption of a methanol/water mixture inside a cyclic peptide nanotube

  • Xialan Si
  • Jianfen Fan
  • Jian Xu
  • Xin Zhao
  • Lingling Zhang
  • Mengnan Qu
Original Paper
  • 53 Downloads

Abstract

Present molecular dynamics simulations indicate that the methanol component in a methanol/water mixture is more likely to be trapped in a cyclic peptide nanotube (CPNT), while water molecules tend to be present at the channel mouths as transient guests. Channel water resides mainly between methanol and the CPNT wall, resulting in a distinct decrease in the H-bond number per channel methanol. Six designed CPNTs with different channel diameters and outer surface characteristics all possess distinct selectivity to methanol over water. Of these, the amphipathic 8 × (AQ)4-CPNT exhibits the best performance. Results in this study provide basic information for the application of a CPNT to enrich methanol from a methanol/water mixture.

Graphical Abstract

Typical overview of water and methanol molecular distribution in cyclic peptide nanotubes

Keywords

MD simulation CPNT Methanol/water mixture Methanol selective adsorption 

Notes

Acknowledgments

This work has been supported by the priority academic program development of Jiangsu higher education institutions and the project of scientific and technologic infrastructure of Suzhou (SZ 201708). It was further supported by the national basic research program of China (973 program, Grant No. 2012CBB25803). The authors are grateful to Dr. Jian Liu and Miss Yi Yu for their insightful suggestions.

Supplementary material

894_2018_3712_MOESM1_ESM.docx (1.3 mb)
ESM 1 (DOCX 1.33 mb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.College of Chemistry, Chemical Engineering and Materials ScienceSoochow UniversitySuzhouPeople’s Republic of China

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