Publication

2020

40. “Mechanochromic Luminescence from Crystals Consisting of Intermolecular Hydrogen-Bonded Sheets”

Yoshimitsu Sagara,* Kiyonori Takahashi, Takayoshi Nakamura, Nobuyuki Tamaoki

Chemistry – An Asian Journal, 2020, 15, 478–482. (Invited)

(Special Issue: “100th Annual Meeting of the Chemical Society of Japan”)

39. “Crystal Structure and Thermoresponsive Luminescence of a 9,10-Bis(Phenylethynyl)Anthracene-Based

Cyclophane”

Yoshimitsu Sagara,* Kiyonori Takahashi, Takayoshi Nakamura, Nobuyuki Tamaoki

Molecular Systems Design & Engineering, 2020, 5, 205–211. (Invited)

(Special Issue: "MSDE Emerging Investigators 2020”)

2019

38. “Mechanoresponsive Behavior of a Polymer-Embedded Red-Light Emitting Rotaxane Mechanophore”

Tatsuya Muramatsu, Yoshimitsu Sagara,* Hanna Traeger, Nobuyuki Tamaoki, Christoph Weder*

ACS Applied Materials & Interfaces, 2019, 11, 24571–24576.

37. “Rotaxane-based Mechanophores Enable Polymers with Mechanically Switchable White Photoluminescence”

Yoshimitsu Sagara,* Marc Karman, Atsushi Seki, Mehboobali Pannipara, Nobuyuki Tamaoki, Christoph Weder*

ACS Central Science, 2019, 5, 874–881.

36. “Photoinduced Emission Color Change of a Rubbed Film of a Bis(cyanostyryl)benzene Analogue”

Ryohei Kaneko, Yoshimitsu Sagara, Shouhei Katao, Nobuyuki Tamaoki, Christoph Weder, and Hideyuki Nakano*

Chemistry-A European Journal, 2019, 25, 6162–6169.

35. “A 1,6-diphenylpyrene-based, photoluminescent cyclophane showing a nematic liquid-crystalline phase at room

temperature”

Yoshimitsu Sagara,* Tatsuya Muramatsu, Nobuyuki Tamaoki,

Crystals, 2019, 9, 92. (Invited) (Special Issue: "Synthesis and Properties of Light-emitting Liquid Crystals”)

34. “Temperature Controlled Locally Excited and Twisted Intramolecular Charge Transfer State Dependent

Fluorescence Switching in Triphenylamine-Thiazole Derivatives”

Anu Kundu, Subramanian Karthikeyan, Yoshimitsu Sagara, Dohyun Moon,* Savarimuthu Philip Anthony,*

ACS Omega, 2019, 4, 5147–5154.

33. “Functional Polymers Through Mechanochemistry”

Stephen Schrettla,* Diederik W. R. Balkenende, Céline Calvino, Marc Karman, Anna Lavrenova, Laura Neumann, Yoshimitsu Sagara, Ester Verde-Sesto, Michela Di Giannantonio, Katharina M. Fromm, Marco Lattuada,

Christoph Weder,*

Chimia, 2019, 73, 7–11.

32. “Mechanoresponsive Luminescent Polymer Blends Based on an Excimer-Forming Telechelic Macromolecule”

Céline Calvino, Yoshimitsu Sagara, Véronique Buclin, Alexander P. Haehnel, Anselmo del Prado Abellán,

Christian Aeby, Yoan C. Simon, Stephen Schrettl, Christoph Weder,*

Macromolecular Rapid Communication, 2019, 40, 1800705.

2018

31. “Cyclophane-Based Fluorescence Tuning Induced by Hydrostatic Pressure Changes”

Yoshimitsu Sagara,* Nobuyuki Tamaoki, Gaku Fukuhara,*

ChemPhotoChem, 2018, 2, 959–963.

30. “Unusual Fluorescent photoswitching of imidazole derivatives: Role of molecular conformation and twist angle

controlled organic solid state fluorescence”

Anu Kundu, Subramanian Karthiheyan, Yoshimitsu Sagara, Dohyun Moon, Savarimuthu Philip Anthony,*

Physical Chemistry Chemical Physics, 2018, 20, 27385–27393.

29. “Linearly Polarized Photoluminescence from an Asymmetric Cyclophane Showing Thermo- and

Mechanoresponsive Luminescence”

Yoshimitsu Sagara,* Atsushi Seki, Yuna Kim, Nobuyuki Tamaoki,*

Journal of Materials Chemistry C, 2018, 6, 8453–8459.

28. “Drastic Modulation of Stimuli-Responsive Fluorescence by a Subtle Structural Change of Organic Fluorophore

and Polymorphism Controlled Mechanofluorochromism”

Palamarneri Sivaraman Hariharan, Gayathri Parthasarathy, Anu Kundu, Subramanian Karthikeyan,

Yoshimitsu Sagara, Dohyun Moon,* Savarimuthu Philip Anthony,*

Crystal Growth and Design, 2018, 18, 3971–3979.

27. “Stimuli-Responsive Dual-Color Photon Upconversion: A Singlet-to-Triplet Absorption Sensitizer in a Soft

Luminescent Cyclophane”

Kazuma Mase, Yoichi Sasaki, Yoshimitsu Sagara,* Nobuyuki Tamaoki, Christoph Weder, Nobuhiro Yanai,*

Nobuo Kimizuka,*

Angewandte Chemie International Edition, 2018, 57, 2806–2810.

26. “Rotaxanes as Mechanochromic Fluorescent Force Transducers in Polymers”

Yoshimitsu Sagara,* Marc Karman, Ester Verde-Sesto, Kazuya Matsuo, Yuna Kim, Nobuyuki Tamaoki,

Christoph Weder,*

Journal of the American Chemical Society, 2018, 140, 1584–1587.

TOC for rotaxane-based mechanoluminophor

2017

25. “Mechanoresponsive luminescence and liquid-crystalline behaviour of a cyclophane featuring two 1,6-bis

(phenylethynyl)pyrene groups”

Yoshimitsu Sagara,* Nobuyuki Tamaoki,*

RSC Advances, 2017, 7, 47056–47062.

24. “Asymmetric Cyclophanes Permit Access to Supercooled Nematic Liquid Crystals with Stimuli-responsive

Luminescence”,

Yoshimitsu Sagara,* Christoph Weder, Nobuyuki Tamaoki,*

Chemistry of Materials, 2017, 29, 6145–6152.

23. “Mechano- and Thermoresponsive Photoluminescent Supramolecular Polymer”,

Anna Lavrenova, Diederik W. R. Balkenende, Yoshimitsu Sagara, Stephen Schrettl, Yoan C. Simon,

Christoph Weder,*

Journal of the American Chemical Society, 2017, 139, 4302–4305.

22. “Temperature-Dependent Mechanochromic Behavior of Mechanoresponsive Luminescent Compounds”,

Yoshimitsu Sagara,* Kazuya Kubo, Takayoshi Nakamura, Nobuyuki Tamaoki, Christoph Weder,*

Chemistry of Materials, 2017, 29, 1273–1278.

2016

21. “Tuning the Thermo- and Mechanoresponsive Behavior of Luminescent Cyclophanes”,

Yoshimitsu Sagara,* Christoph Weder, Nobuyuki Tamaoki,*

RSC Advances, 2016, 6, 80408–80414.

20. “A Mechano- and Thermoresponsive Luminescent Cyclophane”,

Yoshimitsu Sagara,* Yoan C. Simon, Nobuyuki Tamaoki, Christoph Weder,*

Chemical Communications, 2016, 52, 5694–5697.

19. “A Thermo- and Mechanoresponsive Cyano-substituted Oligo(p-Phenylene Vinylene) Derivative with Five

Emissive States”,

Yoshimitsu Sagara,* Anna Lavrenova, Aurélien Crochet, Yoan C. Simon, Katharina M. Fromm, Christoph Weder,*

Chemistry-A European Journal, 2016, 22, 4374–4378.

18. “Mechanoresponsive Luminescent Molecular Assemblies: An Emerging Class of Materials”,

Yoshimitsu Sagara,* Shogo Yamane, Masato Mitani, Christoph Weder, Takashi Kato,*

Advanced Materials, 2016, 28, 1073–1095. (Front Cover Picture)

13. “Steric Effects on Excimer Formation for Photoluminescent Smectic Liquid-crystalline Materials”,

　　 Shogo Yamane, Yoshimitsu Sagara, Takashi Kato,*

　　 Chemical Communications, 2013, 49, 3839–3841.

12. “Mechanochromic Luminescent Liquid Crystals Based on a Bianthryl Moiety”,

　　 Shogo Yamane, Yoshimitsu Sagara, Toshiki Mutai, Koji Araki, Takashi Kato,*

　　 Journal of Materials Chemistry C, 2013, 1, 2648–2656.

11. “Stimuli-Responsive Photoluminescent Liquid Crystals”,

　　 Shogo Yamane, Kana Tanabe, Yoshimitsu Sagara, Takashi Kato,*

　　 Topics in Current Chemistry, 2012, 318, 395–406.

10. “Brightly Tri-colored Mechanochromic Luminescence from the Single Luminophore of a Liquid Crystal:

Reversible Writing and Erasing of the Images”,

　　 Yoshimitsu Sagara, Takashi Kato,*

　　 Angewandte Chemie International Edition, 2011, 50, 9128–9132. (Inside Cover Picture)

Highlighted in Chemical and Engineering News, New Scientist, Chemistry World, NPG Asia Materials, and

Noteworthy Chemistry in ACS.

9. “Piezochromic Luminescence of Amide and Ester Derivatives of Tetraphenylpyrene—Role of Amide Hydrogen

Bonds in Sensitive Piezochromic Response”,

　　 Mitsutaka Sase, Shingo Yamaguchi, Yoshimitsu Sagara, Isao Yoshikawa, Toshiki Mutai, Koji Araki,*

　　 Journal of Materials Chemistry, 2011, 21, 8347–8354.

8. “A Mechanical and Thermal Responsive Luminescent Liquid Crystal Forming a Colourless Film under Room

Light”,

　　 Yoshimitsu Sagara, Takashi Kato,*

　　 Supramolecular Chemistry, 2011, 23, 310–314.

7. “A Thermoresponsive Photoluminescent Smectic Liquid Crystal: Change of Photoluminescent Color on the

Smectic–Smectic Phase Transition”,

　　 Shogo Yamane, Yoshimitsu Sagara, Takashi Kato,*

　　 Chemical Communications, 2009, 3597–3599.

6. “Mechanically Induced Luminescence Changes in Molecular Assemblies”,

　　 Yoshimitsu Sagara, Takashi Kato,*

　　Nature Chemistry, 2009, 1, 605–610.

5. “A Stimuli-Responsive, Photoluminescent, Anthracene-Based Liquid Crystal: Emission Color Determined by

Thermal and Mechanical Processes”,

　　 Yoshimitsu Sagara, Shogo Yamane, Toshiki Mutai, Koji Araki, Takashi Kato,*

　　 Advanced Functional Materials, 2009, 19, 1869–1875.

4. “Stimuli-Responsive Luminescent Liquid Crystals: Change of Photoluminescent Colors Triggered

by a Shear-Induced Phase Transition”,

　　 Yoshimitsu Sagara, Takashi Kato,*

　　 Angewandte Chemie International Edition, 2008, 47, 5175–5178.

3. “Material Design for Piezochromic Luminescence: Hydrogen-Bond-Directed Assemblies of a Pyrene Derivative”,

　　 Yoshimitsu Sagara, Toshiki Mutai, Isao Yoshikawa, Koji Araki,*

　　 Journal of the American Chemical Society, 2007, 129, 1520–1521.

2. “Uniaxially Parallel Alignment of a Smectic A Liquid-Crystalline Rod−Coil Molecule and Its Lithium Salt Complexes

Using Rubbed Polyimides”,

　　 Yosuke Iinuma, Kenji Kishimoto, Yoshimitsu Sagara, Masafumi Yoshio, Tomohiro Mukai, Ichiro Kobayashi,

Hiroyuki Ohno, Takashi Kato,*

　　 Macromolecules, 2007, 40, 4874–4878.

1. “Two Dimensionally Ion-Conductive Liquid Crystals of Cholesterol/Tetra(Ethylene Oxide) Block Molecules”,

　　 Kenji Kishimoto, Yoshimitsu Sagara, Tomohiro Mukai, Hiroyuki Ohno, Nobuyuki Tamaoki, Takashi Kato,*

　　 Molecular Crystals and Liquid Crystals, 2005, 435, 777–785.

~2015

17. “Mechanochemistry in Polymers with Supramolecular Mechanophores”,

　　 Alexander P. Haehnel, Yoshimitsu Sagara, Yoan C. Simon,* Christoph Weder,*

　　 Topics in Current Chemistry, 2015, 369, 345−375.

16. “Thermal or Mechanical Stimuli-Induced Photoluminescence Color Change of a Molecular Assembly

Composed of an Amphiphilic Anthracene Derivative in Water”,

　　 Yoshimitsu Sagara, Toru Komatsu, Takuya Terai, Tasuku Ueno, Kenjiro Hanaoka, Takashi Kato,

Tetsuo Nagano,*

　　 Chemistry-A European Journal, 2014, 20, 10397−10403.

15. “Covalent Attachment of Mechanoresponsive Luminescent Micelles to Glasses and Polymers in Aqueous

Conditions”,

　　Yoshimitsu Sagara, Toru Komatsu, Tasuku Ueno, Kenjiro Hanaoka, Takashi Kato, Tetsuo Nagano,*

　　 Journal of the American Chemical Society, 2014, 136, 4273−4280.

14. “A Water-soluble Mechanochromic Luminescent Pyrene Derivative Exhibiting Recovery of the Initial

Photoluminescence Color in a High-humidity Environment”,

　　 Yoshimitsu Sagara, Toru Komatsu, Tasuku Ueno, Kenjiro Hanaoka, Takashi Kato, Tetsuo Nagano,*

　　 Advanced Functional Materials, 2013, 23, 5277–5284.

日本語の解説記事・本

7. 相良剛光

「クロミックポリマー」、高分子、68、501-505、2019.

6. 相良剛光

「伸ばすと光るゴム―超分子メカノルミノフォアの創製―」、現代化学、572、56-59、2018.

5. 相良剛光

「機械的刺激で発光色が変化する有機材料」、化学と教育、66、232-235、2018.

4. 相良剛光・三谷真人・長野哲雄・加藤隆史

「デンドロンを利用した機械的刺激応答性発光材料の開発」、ファインケミカル、44、21-28、2015.

3. 相良剛光・加藤隆史

「三色の発光色を示すメカノクロミックルミネッセンス液晶材料の開発」、液晶、 17、 117–124、 2013.

2. 相良剛光・加藤隆史

「液晶－構造制御と機能化の最前線－」（シーエムシー出版）中の第二章「超分子液晶の分子設計と環境・刺激応答性材料への展開」の章、16–22、2010.

1. 加藤隆史・一川尚広・相良剛光

　「ソフトマター～分子設計・キャラクタリゼーションから機能性材料まで」（丸善）中の第二章第三項「液晶」、41–49、2009.