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Synthesis of Helical Phenolic Resin Bundles through a Sol-Gel Transcription Method

Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
Author to whom correspondence should be addressed.
Academic Editor: Pablo H. Di Chenna
Received: 5 January 2017 / Revised: 17 February 2017 / Accepted: 18 February 2017 / Published: 23 February 2017
(This article belongs to the Special Issue Gels as Templates for Transcription)
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Chiral and helical polymers possess special helical structures and optical property, and may find applications in chiral catalysis and optical devices. This work presents the preparation and formation process of helical phenolic resins through a sol-gel transcription method. A pair of bola-type chiral low-molecular-weight gelators (LMWGs) derived from valine are used as templates, while 2,4-dihydroxybenzoic acid and formaldehyde are used as precursors. The electron microscopy images show that the phenolic resins are single-handed helical bundles comprised of helical ultrafine nanofibers. The diffused reflection circular dichroism spectra indicate that the helical phenolic resins exhibit optical activity. A possible formation mechanism is proposed, which shows the co-assembly of the LMWGs and the precursors. View Full-Text
Keywords: nanoparticles; polymers; sol-gel preparation; optical activity nanoparticles; polymers; sol-gel preparation; optical activity

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Shao, C.; Li, J.; Chen, H.; Li, B.; Li, Y.; Yang, Y. Synthesis of Helical Phenolic Resin Bundles through a Sol-Gel Transcription Method. Gels 2017, 3, 9.

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