Development of Poly(diphenylacetylene) Based Novel 2D Chiral Materials with Controlled Nano-pattern

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K14671
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 35010:Polymer chemistry-related
• Research Institution: Kanazawa University
• Principal Investigator: Sandip Das 金沢大学, ナノ生命科学研究所, 特任助教 (00873407)
• Project Period (FY): 2021-04-01 – 2023-03-31
• Keywords: Helical Polymer / Atomic Force Microscopy

Outline of Final Research Achievements

For the fabrication of ordered two dimensional (2D) crystal structure of chiral macromolecules on solid substrates through structural characterization of helical polymers are essential. To address the above issues, the helical structures of poly(diphenylacetylene)s (PDPAs) bearing optically active substituents linked through amide bonds and with a helicity memory have been visualised directly using high resolution atomic force microscopy (AFM). The PDPAs self-assembled into a short-range, ordered 2D monolayer on highly oriented pyrolytic graphite (HOPG) substrates upon exposure to solvent vapour, whose helical pitch and handedness (right- and left-handed) has been revealed for the first time with molecular resolution.

Free Research Field

高分子化学

Academic Significance and Societal Importance of the Research Achievements

本研究において、世界で初めてポリジフェニルアセチレンの立体構造をAFMによって観察することができた。この結果は、キラルマテリアルとして有用なポリジフェニルアセチレンの分子設計に大いに役立つ。また、関連するポリジフェニルアセチレン誘導体の立体構造も明らかに出来た事から、その学術的意義は大変高い。また、本研究はAFM測定法の研究分野と高分子化学の研究分野との融合研究であり、学際的な観点からも意義は高い。