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Kasahara Yotaro
| Research Institute for Electronic Science Material and Molecular Sciences | Assistant Professor |
Researcher basic information
■ Degree■ URL
researchmap URLホームページURL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research KeywordResearch Field
Career
■ CareerCareer
- Apr. 2026 - Present
Hokkaido University, Research Institute for Electronic Science, 助教, Japan - Apr. 2025 - Mar. 2026
Tohoku University, Institute of Multidisciplinary Research for Advanced Materials Materials-Measurement Hybrid Research Center
- Apr. 2022 - Mar. 2025, Tohoku University, Graduate School of Engineering, Department of Applied Chemistry, 博士後期課程
- Apr. 2020 - Mar. 2022, Tohoku University, Graduate School of Engineering, Department of Applied Chemistry, 博士前期課程, Japan
- Apr. 2014 - Mar. 2020, Tohoku University, Faculty of Engineering, Department of Applied Chemistry, Chemical Engineering and Biomolecular Engineering
Research activity information
■ Awards- Oct. 2021, 日本化学会東北支部, 令和3年度化学系学協会東北大会優秀ポスター賞
Molecular Glass Material based on Hexadehydrotribenzo[12]annulene
笠原遥太郎;武田貴志;星野哲久;久木一朗;芥川智行
- Molecular design and physical properties of alkylamide-substituted 3-fold symmetric molecules
Yotaro Kasahara; Takashi Takeda; Tomoyuki Akutagawa
Chemistry Letters, 54, 10, Oxford University Press (OUP), 25 Sep. 2025, [Peer-reviewed], [Lead author]
English, Scientific journal, Abstract
C 3-symmetric molecules incorporating alkylamide chains (−CONHCnH2n+1) form 1-dimensional (1D) columnar structures via intermolecular amide hydrogen bonding, exhibiting diverse physical properties. In these molecular systems, ferroelectricity based on amide group dipole inversion is observed, particularly pronounced in the discotic hexagonal columnar (Colh) liquid crystal phase. In systems incorporating chiral side alkyl chains, a pronounced chirality effect on molecular dynamics is observed. Cooperative dipole inversion, facilitated by unidirectional helical assembly structures, leads to the remarkable phenomenon of dramatically reduced coercive electric field. Furthermore, studies of ferroelectric–antiferroelectric mixed systems have revealed the correlation length required for ferroelectricity to emerge within 1D ferroelectric domains. This molecular design concept has been extended to various 3-fold symmetric frameworks, including triphenylamine, triphenylmethanol, triptycene, and hexadihydrotribenzo[12]annulene. Diverse assembly structure and physical property such as ferroelectricity, chirality effects, and glass formation have been discovered in these molecular systems. Alkylamide-substituted 3-fold symmetric molecules offer high design flexibility and are positioned as a molecular platform with great potential for self-assembly and property control. - Ring-Size Effect on Molecular Assembly Structures and Optical Properties of C3-Symmetrical Dehydrobenzoannulene Derivatives
Yotaro Kasahara; Takashi Takeda; Shun Dekura; Hayato Anetai; Atsuro Takai; Ichiro Hisaki; Masayuki Takeuchi; Tomoyuki Akutagawa
The Journal of Physical Chemistry B, American Chemical Society (ACS), 05 Aug. 2025, [Peer-reviewed], [Lead author]
Scientific journal - Supramolecular Polymorphism of the Hydrogen-Bonded C3-Symmetrical Hexadehydrotribenzo[12]annulene Derivative
Yotaro Kasahara; Takashi Takeda; Shun Dekura; Yoshiki Ishii; Hayato Anetai; Atsuro Takai; Ichiro Hisaki; Masayuki Takeuchi; Tomoyuki Akutagawa
Journal of the American Chemical Society, 147, 22, 18783, 18795, American Chemical Society (ACS), 25 May 2025, [Peer-reviewed], [Lead author]
Scientific journal - Solid‐State Fluorescence of Excited‐State Cation–Anion Intermolecular Proton Transfer in 2‐(2‐Hydroxypyridyl)benzothiazole
Keigo Takahashi; Kohei Sambe; Yotaro Kasahara; Takashi Takeda; Norihisa Hoshino; Ken‐ichi Sakai; Tomoyuki Akutagawa
Advanced Optical Materials, 10, 11, 2200134, 2200134, Wiley, Jun. 2022, [Peer-reviewed]
Scientific journal - Fluorescent Molecular Glass based on Hexadehydrotribenzo[12]annulene
Yotaro Kasahara; Ichiro Hisaki; Tomoyuki Akutagawa; Takashi Takeda
Chemical Communications, 57, 44, 5374, 5377, May 2021, [Peer-reviewed], [Lead author]
English, Scientific journal - Color-Tunable Arylaminoanthraquinone Dyes through Hydrogen-Bond-Assisted Charge Transfer Interaction
Takashi Takeda; Yotaro Kasahara; Tomoyuki Akutagawa
RSC Advances, 11, 39, 24217, 24231, Royal Society of Chemistry (RSC), 2021, [Peer-reviewed]
Scientific journal,A color-tunable anthraquinone library based on arylaminoanthraquinone was prepared through hydrogen-bond-assisted charge transfer interaction.
- Synthesis and physical properties of C8-BTBT derivative with perfluoroalkyl amide groups
樫井駿輝; 三部宏平; 笠原遥太郎; 佐藤鉄; 佐藤鉄; 出倉駿; 出倉駿; 武田貴志; 芥川智行; 芥川智行, 日本化学会春季年会講演予稿集(Web), 105th, 2025 - Molecular Assembly Structure and Physical Properties of Liquid Crystalline Molecules based on Fluorine Substituted Aryl Glutarate Ester Derivative
笠原遥太郎; 笠原遥太郎; 若松佳苗; 出倉駿; 出倉駿; 佐藤鉄; 佐藤鉄; CHEN Hsiu-Hui; 芥川智行; 芥川智行, 分子科学討論会講演プログラム&要旨(Web), 19th, 2025 - Structure and physical properties of organic polar thin films of C8-BTBT derivatives with fluoroalkyl group
樫井駿輝; 佐藤鉄; 佐藤鉄; 三部宏平; 笠原遥太郎; 笠原遥太郎; 出倉駿; 出倉駿; 丸山伸伍; 武田貴志; 松本祐司; 芥川智行; 芥川智行, 分子科学討論会講演プログラム&要旨(Web), 19th, 2025
- キラルなカンファーキノンイミン誘導体の集合体構造、光異性化挙動および物性
佐藤愛斗; 出倉駿; 佐藤鉄; 笠原遥太郎; 芥川智行
日本化学会第106春季年会, 17 Mar. 2026, Japanese, Oral presentation
17 Mar. 2026 - 20 Mar. 2026 - Structure and functionalities of organic polar thin films of C8-BTBT derivative with fluoroalkyl amide chains
Shunki Kashii; Tetsu Sato; Yotaro Kasahara; Kohei Sambe; Shun Dekura; Shingo Maruyama; Takashi Takeda; Yuji Matsumoto; Tomoyuki Akutagawa
The 15th China-Japan Joint Symposium on Conduction and Photoconduction in Organic Solids and Related Phenomena, 26 Oct. 2025, English, Poster presentation
24 Oct. 2025 - 27 Oct. 2025 - 〔Major achievements〕Supramolecular Polymorphic Behavior of the Hydrogen-Bonded C3-Symmetrical Hexadehydrotribenzo[12]annulene Derivative
Yotaro Kasahara; Takashi Takeda; Shun Dekura; Yoshiki Ishii; Atsuro Takai; Hayato Anetai; Ichiro Hisaki; Masayuki Takeuchi; Tomoyuki Akutagawa
The 15th China-Japan Joint Symposium on Conduction and Photoconduction in Organic Solids and Related Phenomena, 26 Oct. 2025, English, Keynote oral presentation
24 Oct. 2025 - 27 Oct. 2025, [Invited] - Structure and functionalities of organic polar thin films of C8-BTBT derivative with fluoroalkyl amide groups
Shunki Kashii; Tetsu Sato; Yotaro Kasahara; Kohei Sambe; Shun Dekura; Shingo Maruyama; Takashi Takeda; Yuji Matsumoto; Tomoyuki Akutagawa
International Symposium on Crystalline Organic Metals, Superconductors and Magnets, 29 Sep. 2025, English, Poster presentation
28 Sep. 2025 - 03 Oct. 2025 - フルオロアルキルアミド基を導入したC8-BTBT誘導体が形成する有機極性薄膜の構造と物性
樫井駿輝; 佐藤鉄; 三部宏平; 笠原遥太郎; 出倉駿; 丸山伸伍; 武田貴志; 松本祐司; 芥川智行
第25回東北大学多元物質科学研究所研究発表会, 24 Sep. 2025, Japanese, Poster presentation - グルタル酸フッ素置換アリールエステル誘導体の形成する液晶相の分子集合体構造と物性
笠原遥太郎; 若松佳苗; 出倉駿; 佐藤鉄; 陳秀慧; 芥川智行
第19回分子科学討論会, 15 Sep. 2025, Japanese, Poster presentation
12 Sep. 2025 - 15 Sep. 2025 - フルオロアルキルアミド基を導入したC8-BTBT誘導体が形成する有機極性薄膜の構造と物性
樫井駿輝; 佐藤鉄; 三部宏平; 笠原遥太郎; 出倉駿; 丸山伸伍; 武田貴志; 松本祐司; 芥川智行
第19回分子科学討論会, 14 Sep. 2025, Japanese, Oral presentation
12 Sep. 2025 - 15 Sep. 2025 - Structure and physical properties of organic polar thin films of C8-BTBT derivatives with fluoroalkyl chain
Shunki Kashii; Tetsu Sato; Yotaro Kasahara; Kohei Sambe; Shun Dekura; Shingo Maruyama; Takashi Takeda; Yuji Matsumoto; Tomoyuki Akutagawa
令和7年度化学系学協会東北大会, 07 Sep. 2025, English, Poster presentation
06 Sep. 2025 - 07 Sep. 2025 - フルオロアルキルアミド基を導入したC8-BTBT誘導体の合成と物性
樫井 駿輝; 三部 宏平; 笠原 遥太郎; 佐藤 鉄; 出倉 駿; 武田 貴志; 芥川 智行
日本化学会第105春季年会, 27 Mar. 2025, Japanese, Oral presentation
26 Mar. 2025 - 29 Mar. 2025 - テトラデシルアミド置換ヘキサデヒドロトリベンゾ[12]アヌレン誘導体の溶媒に依存した分子集合構造間における物性の相違
笠原遥太郎; 武田貴志; 出倉駿; 高井淳朗; 姉帯勇人; 久木一朗; 竹内正之; 芥川智行
第18回分子科学討論会, 21 Sep. 2024, Japanese, Poster presentation
18 Sep. 2024 - 21 Sep. 2024, 京都, [Domestic Conference] - テトラデシルアミド基を有するヘキサデヒドロトリベンゾ[12]アヌレン誘導体が示す分子集合体構造の溶媒依存性
笠原遥太郎; 武田貴志; 出倉駿; 久木一朗; 高井淳朗; 姉帯勇人; 竹内正之; 芥川智行
第34回基礎有機化学討論会, 11 Sep. 2024, Japanese, Oral presentation
11 Sep. 2024 - 13 Sep. 2024, 札幌, [Domestic Conference] - Solvent Dependence of Molecular Assembly Structures of Hexadehydrotribenzo[12]annulene Derivatives with Alkylamide groups
Yotaro Kasahara; Takashi Takeda; Shun Dekura; Atsuro Takai; Hayato Anetai; Ichiro Hisaki; Masayuki Takeuchi; Tomoyuki Akutagawa
International Congress on Pure & Applied Chemistry Mongolia 2024, 31 Aug. 2024, English, Oral presentation
28 Aug. 2024 - 01 Sep. 2024 - アルキルアミド置換ヘキサデヒドロトリベンゾ[12]アヌレン誘導体の形成する分子集合体の溶媒依存性
笠原遥太郎; 武田貴志; 出倉駿; 久木一朗; 高井淳朗; 姉帯勇人; 竹内正之; 芥川智行
日本化学会第104春季年会, 20 Mar. 2024, English, Oral presentation
18 Mar. 2024 - 21 Mar. 2024, 船橋, [Domestic Conference] - 複数のアルキルアミド基を有するベンゼン誘導体の分子集合構造と物性
飯田沙織; 笠原遥太郎; 芥川智行; 武田貴志
日本化学会第104春季年会, 19 Mar. 2024, Japanese, Oral presentation
18 Mar. 2024 - 21 Mar. 2024, 船橋, [Domestic Conference] - デヒドロベンゾアヌレンを基盤とした一次元分子集合体と物性
笠原遥太郎; 武田貴志; 出倉駿; 久木一朗; 高井淳朗; 姉帯勇人; 竹内正之; 芥川智行
高密度共役若手合宿, 16 Dec. 2023, Japanese, Oral presentation
16 Dec. 2023 - 17 Dec. 2023, 大久野島, [Domestic Conference] - Preparation, molecular assembly structures and physical properties of dehydrobenzoannulene derivative with tetradecylamide group
Yotaro Kasahara; Takashi Takeda; Shun Dekura; Atsuro Takai; Hayato Anetai; Ichiro Hisaki; Masayuki Takeuchi; Tomoyuki Akutagawa
National Taipei University of Technology & Tohoku University 2023 Joint Symposium, 11 Dec. 2023, English, Poster presentation
11 Dec. 2023 - 12 Dec. 2023 - テトラデシルアミド基を有するヘキサデヒドロトリベンゾ[12]アヌレン誘導体の分子集合体構造と物性
笠原遥太郎; 武田貴志; 出倉駿; 高井淳朗; 姉帯勇人; 久木一朗; 竹内正之; 芥川智行
第54回中部化学関係学協会支部連合秋季大会, 11 Nov. 2023, Japanese, Poster presentation
11 Nov. 2023 - 12 Nov. 2023, 三重, [Domestic Conference] - テトラデシルアミド基を有するデヒドロベンゾアヌレン誘導体の分子集合体構造と物性
笠原遥太郎; 武田貴志; 出倉駿; 久木一朗; 高井淳朗; 姉帯勇人; 竹内正之; 芥川智行
第17回分子科学討論会, 13 Sep. 2023, Japanese, Oral presentation
12 Sep. 2023 - 15 Sep. 2023, 大阪, [Domestic Conference] - Ring Size Effect for Molecular Assemblies of C3-symmetric π Conjugated Molecules with Alkylbenzoate Groups
Yotaro Kasahara
Exploration of Molecular Solid-State Chemistry Based on Dynamic Molecular Mechanisms First Research Meeting, 02 Aug. 2023, Oral presentation - アルキルアミド置換したデヒドロベンゾアヌレン誘導体の分子集合体構造と物性
笠原遥太郎; 武田貴志; 久木一朗; 芥川智行
日本化学会第103春季年会, 23 Mar. 2023, Japanese, Oral presentation
22 Mar. 2023 - 25 Mar. 2023, 野田, [Domestic Conference] - オクチルベンゾエート置換されたデヒドロベンゾアヌレンの分子集合体構造への環サイズ効果
笠原遥太郎
分子性機能材料研究会2022, 22 Dec. 2022, Japanese, Oral presentation
22 Dec. 2022 - 22 Dec. 2022, 仙台, [Domestic Conference] - アルキルアミド基を有するデヒドロベンゾアヌレン誘導体の合成、分子集合体構造および物性
笠原遥太郎; 武田貴志; 久木一朗; 芥川智行
第32回基礎有機化学討論会, 20 Sep. 2022, Japanese, Poster presentation
20 Sep. 2022 - 22 Sep. 2022, 京都, [Domestic Conference] - Ring Size Effect for Molecular Assembly of Dehydroannulenes with Octylbenzoate Groups
Yotaro Kasahara; Takashi Takeda; Ichiro Hisaki; Tomoyuki Akutagawa
International Conference on Organic Materials for Electronics and Photonics 2022, 02 Sep. 2022, English, Poster presentation - Ring Size Effect for Molecular Assembly of Dehydroannulenes with Octyloxycarbonylphenyl Groups
Yotaro Kasahara; Takashi Takeda; Ichiro Hisaki; Tomoyuki Akutagawa
2022 Tohoku University Chemistry Summer School, 19 Aug. 2022, English, Invited oral presentation
[Invited] - オクチルベンゾエート基を有するデヒドロベンゾアヌレン類の分子集積における環サイズの影響
笠原遥太郎; 武田貴志; 久木一朗; 芥川智行
日本化学会第102春季年会, 23 Mar. 2022, Japanese, Oral presentation
23 Mar. 2022 - 26 Mar. 2022, オンライン, [Domestic Conference] - Molecular Assembly, and Physical Properties of Octylbenzoate-Substituted Hexadehydrotribenzo[12]annulene
Yotaro Kasahara; Takashi Takeda; Ichiro Hisaki; Tomoyuki Akutagawa
2021 International Chemical Congress of Pacific Basin Societies, 20 Dec. 2021, English, Poster presentation - Luminescent Molecular Glass based on Hexadehydrotribenzo[12]annulene
Yotaro Kasahara; Takashi Takeda; Ichiro Hisaki; Tomoyuki Akutagawa
2021 Annual Joint Symposium Tohoku University ＆ National Taipei University of Technology, 30 Nov. 2021, English, Oral presentation - ヘキサデヒドロトリベンゾ[12]アヌレンを基盤とした発光性分子性ガラス材料
笠原遥太郎; 武田貴志; 久木一朗; 芥川智行
第1回基礎有機化学会若手オンラインシンポジウム, 19 Nov. 2021, Japanese, Oral presentation
19 Nov. 2021 - 19 Nov. 2021, オンライン, [Domestic Conference] - ヘキサデヒドロトリベンゾ[12]アヌレンを基盤とした分子性ガラス材料
笠原遥太郎; 武田貴志; 久木一朗; 芥川智行
ソフトクリスタル研究遂行会議, 06 Nov. 2021, Japanese, Poster presentation
05 Nov. 2021 - 07 Nov. 2021, 静岡, [Domestic Conference] - Molecular Glass Material based on Hexadehydrotribenzo[12]annulene
笠原遥太郎; 武田貴志; 星野哲久; 久木一朗; 芥川智行
令和3年度化学系学協会東北大会, 02 Oct. 2021, English, Poster presentation
02 Oct. 2021 - 03 Oct. 2021, オンライン, [Domestic Conference] - 分子性ガラスを形成する[12]DBA誘導体の金属錯体
笠原遥太郎; 武田貴志; 星野哲久; 久木一朗; 芥川智行
第15回分子科学討論会, 19 Sep. 2021, Japanese, Poster presentation
18 Sep. 2021 - 21 Sep. 2021, オンライン, [Domestic Conference] - オクチルオキシカルボニルフェニル基を有するC3対称性拡張π電子系化合物の分子集積構造及び物性の評価
笠原遥太郎; 武田貴志; 星野哲久; 久木一朗; 芥川智行
日本化学会第101春季年会, 20 Mar. 2021, Japanese, Oral presentation
19 Mar. 2021 - 22 Mar. 2021, オンライン, [Domestic Conference] - オクチルオキシカルボニルフェニル基を有するC3対称性π共役分子の合成、分子集積構造及び物性の評価
笠原遥太郎; 武田貴志; 星野哲久; 久木一朗; 芥川智行
第20回多元物質科学研究所研究発表会, 07 Dec. 2020, Japanese, Poster presentation
03 Dec. 2020 - 07 Dec. 2020, オンライン, [Domestic Conference] - Preparation and molecular assembly of tribenzodehydroannulenes with octylcarboxylphenyl groups
笠原遥太郎; 武田貴志; 星野哲久; 久木一朗; 芥川智行
令和2年度化学系学協会東北大会, 26 Sep. 2020, English, Poster presentation
26 Sep. 2020 - 27 Sep. 2020, オンライン, [Domestic Conference] - オクチルカルボキシルフェニル基を有するC3対称性デヒドロベンゾアヌレン類の集積構造と物性
笠原遥太郎; 武田貴志; 星野哲久; 久木一朗; 芥川智行
分子科学オンライン討論会, 16 Sep. 2020, Japanese, Oral presentation
14 Sep. 2020 - 17 Sep. 2020, オンライン, [Domestic Conference] - オクチルカルボニルフェニル基を有するヘキサデヒドロトリベンゾ[12]アヌレンの合成及び物性
笠原遥太郎; 武田貴志; 星野哲久; 久木一朗; 芥川智行
日本化学会第100回春季年会, 22 Mar. 2020, Japanese, Oral presentation
22 Mar. 2020 - 25 Mar. 2020, 野田, [Domestic Conference]
