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Theoretical studies on optical activities of helical polymers based on localized orbitals under the periodic boundary condition

Research Project

Project/Area Number 19K05392
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 32010:Fundamental physical chemistry-related
Research InstitutionTokyo Denki University

Principal Investigator

Hatanaka Masashi  東京電機大学, 工学部, 助教 (40772778)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsらせん高分子 / 光学活性 / 量子化学 / 結晶軌道法 / ワニエ関数 / サイズ効果 / 異方性 / 局在化軌道 / 分子軌道 / 円二色性 / 量子化学計算 / 周期的境界条件 / 結晶 / 旋光強度 / 光学分割
Outline of Research at the Start

近年、らせん構造をもつ高分子の精密な合成法が確立されてきており、そのらせん構造に由来する光学活性を利用した光学異性体の分割、光学材料、触媒など様々な分野での応用が期待されている。そこで本研究では、らせん高分子の光学活性を理論的に求めるための原理を定式化し、定量的な数値計算も可能になるようにプログラム開発を行う。また、実際にらせん高分子を合成して光学活性の評価を行い、理論計算と比較検討する。光学活性と光学分割能(光学異性体の分離能)の関係を模索し、光学活性の基礎物理化学として新しい視点を得たい。

Outline of Final Research Achievements

In light of recent advances in the science of helical polymers, the optical activities of them were deduced under the periodic boundary condition with localized orbitals (Wannier functions). The optical rotatory strength was attributed to interactions between localized Wannier functions around each cell, and the optical activities of helical polyacetylene were quantitatively reproduced. Based on this theory, size effect of the optical rotatory strength was correctly interpreted. In addition, this theory was extended to general three-dimensional crystals, and theory of the anisotropic optical activities was established. On the other hand, we attempted to apply the theory above to synthetic poly(acrylic acid) and polyuret, which is the fundamental skeleton of helical polymers, and some related compounds led to new magnetic properties and intriguing tautomerism.

Academic Significance and Societal Importance of the Research Achievements

本研究はらせん高分子の光学活性に関する理論的定式化を行うものであり、結晶軌道法に基づいた量子化学的手法によりその旋光強度を定量的に導出することを目指して遂行された。その方法は周期的境界条件下で実数の局在化軌道(ワニエ関数)を用いることを特徴としており、光学活性はそれらの相互作用の和として表現されるため、当該分野の基礎的な学理として化学的直観に優れた見通しを与える。本研究はらせん高分子の光学活性におけるサイズ効果への応用、さらに一般の3次元結晶における異方性光学活性の理論への拡張につながった。とくに後者は国際的にも未達成の課題であるためその意義は大きく、結晶光学への広汎な応用が期待される。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (17 results)

All 2024 2023 2022 2021 2020 2019 Other

All Journal Article (13 results) (of which Peer Reviewed: 11 results) Presentation (1 results) Book (1 results) Remarks (2 results)

  • [Journal Article] Size dependence of optical activities in helical polymers”2024

    • Author(s)
      M. Hatanaka
    • Journal Title

      Chirality

      Volume: 36 Issue: 2

    • DOI

      10.1002/chir.23641

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A structural study on chiral poly(methacrylic acid) polymerized with chitosan templates2024

    • Author(s)
      D. Sayama, M. Hatanaka, M. Miyasaka
    • Journal Title

      J. Mol. Struct.

      Volume: 1295 Pages: 136710-136710

    • DOI

      10.1016/j.molstruc.2023.136710

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optical activities of organic crystals: Crystal orbital formulation of anisotropic gyration”2024

    • Author(s)
      M. Hatanaka
    • Journal Title

      Submitted.

      Volume: -

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Unusual tautomerism of methyl allophanate: Selective crystallization of the minor component via the hydrogen-bond network2024

    • Author(s)
      M. Hatanaka
    • Journal Title

      To be submitted.

      Volume: -

    • Related Report
      2023 Annual Research Report
  • [Journal Article] A structural study on chiral poly(methacrylic acid) polymerized with chitosan templates2023

    • Author(s)
      D. Sayama, M, Hatanaka, M. Miyasaka
    • Journal Title

      submitted.

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Optical activities of organic crystals: Crystal orbital formulation of anisotropic gyration2023

    • Author(s)
      M. Hatanaka
    • Journal Title

      submitted.

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] ”Optical activities of organic crystals: Crystal orbital formulation of anisotropic gyration”2022

    • Author(s)
      M. Hatanaka
    • Journal Title

      submitted.

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] “Optical activities of helical polymers: A crystal orbital theory based on Wannier functions“2021

    • Author(s)
      M. Hatanaka
    • Journal Title

      Theor. Chem. Acc., 140, 153 (2021).

      Volume: 140 Issue: 11

    • DOI

      10.1007/s00214-021-02843-9

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Optical activities of organic crystals ―Crystal orbitals formulation of anisotropic gyration2021

    • Author(s)
      M. Hatanaka
    • Journal Title

      to be submitted.

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Optical activities of helical polymers: A crystal orbital theory based on Wannier functions2020

    • Author(s)
      M. Hatanaka
    • Journal Title

      Theor. Chem. Acc., submitted.

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Polyuret2020

    • Author(s)
      M. Hatanaka
    • Journal Title

      Powder Diffraction File, submitted.

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Structural aspects and electronic states of polyuret ― Construction of robust extended systems with nonbonding flat bands ―2020

    • Author(s)
      Yiming. Liu, Masashi. Hatanaka, Makoto. Miyasaka
    • Journal Title

      Polym. J., accepted.

      Volume: to be published.

    • NAID

      40022335675

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] A 1-Phenylbiguanide-iodine complex ― An imino π-cation radical of guanidines2020

    • Author(s)
      Masashi. Hatanaka, Yiming. Liu, Makoto. Miyasaka
    • Journal Title

      Chem. Lett., accepted.

      Volume: to be published.

    • NAID

      130007884694

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] ポリウレットの構造化学2019

    • Author(s)
      Yiming Liu, Masashi Hatanaka, Makoto Miyasaka
    • Organizer
      高分子討論会(福井大学, 2019)
    • Related Report
      2019 Research-status Report
  • [Book] Polyuret, in Powder Diffraction File, ICDD, PDF-4+2023

    • Author(s)
      Y. Liu, M. Hatanaka, M, Miyasaka
    • Publisher
      International Centre for Diffraction Data
    • Related Report
      2022 Research-status Report
  • [Remarks] Research map (Masashi Hatanaka)

    • URL

      https://researchmap.jp/read0150222

    • Related Report
      2023 Annual Research Report
  • [Remarks] Researchmap

    • URL

      https://researchmap.jp/read0150222/published_papers

    • Related Report
      2021 Research-status Report 2020 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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