Self-assembled helical superstructures of polystyrene-b-poly(2-vinyl pyridine) with inversed helicity from induced chirality. (August 2021)

• Record Type: Journal Article
• Authors: Yang, Che-Chia; Puneet, Puhup; Lin, I-Ming; Chiang, Yeo-Wang; Ho, Rong-Ming
• Is Part Of: Giant. Volume 7(2021)
• Publication Date: 2021-08
• Subjects: Macromolecules -- Periodicals; Nanostructured materials -- Periodicals; Smart materials -- Periodicals; Biomimetic materials -- Periodicals; Nanostructures; Smart Materials; Biomimetic Materials; Macromolecular Substances; Biomimetic materials; Macromolecules; Nanostructured materials; Smart materials; Electronic journals; Periodical; Periodicals; 547.7
• DOI: 10.1016/j.giant.2021.100059
• Languages: English
• ISSNs: 2666-5425

Abstract

Abstract: This work aimed to examine the self-assembling behaviors of polystyrene-b-poly(2-vinyl pyridine) (PS-P2VP) complexed with chiral dopants, R-/S-mandelic acid (R-/S-MA). Induced vibrational circular dichroism (VCD) due to intra-chain chiral interaction suggests the formation of helical P2VP with preferred handedness by complexation with R-/S-MA, demonstrating the induced circular dichroism (ICD) behaviors for the C-C single bond without high-degree tacticity. Owing to the microphase separation, helical superstructures with controlled helicity could be formed from the self-assembly of PS-P2VP with ICD. Most interestingly, the self-assembled helical ribbon exhibits reversed helical sense to the helical P2VP, as evidenced by induced VCD through inter-chain chiral interaction and rationalized using cholesteric hard-core model due to a large value of P/d ratio. Graphical abstracts: Image, graphical abstract