List of Publications
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Original Papers
21. Seigo Watanabe, Hana Matsunaga, Tomoya Yano, Zexin An, Kenichi Oyaizu*
"Sulfone Bonding in High-Refractive-Index Poly(dithioacetal)s: Molecular Design toward Improved Transparency and Thermostability"
Macromolecules, in press.(DOI: 10.1021/acs.macromol.6c01790)
20. Yugo Tosaki, Seigo Watanabe,* Yoshino Tsunekawa, Yuki Yoshida, Kenichi Oyaizu*
"Amphiphilic Poly(Phenylene Sulfide)-Poly(Vinyl Catechol) Block Copolymers Enabling Hydrophobic/Hydrophilic Adhesion"
Small, in press. (DOI: 10.1002/smll.75869)
19. Takuya Yokoo,‡ Seigo Watanabe,‡ Hana Matsunaga, Kenichi Oyaizu* (‡: Equal contribution)
"Generative and Experimental Validation of High Refractive Index Polymers via Domain Knowledge Approach with Small Data"
Adv. Intel. Discov. 2026, in press. (DOI: 10.1002/aidi.70136)
18. Seigo Watanabe, Tomoya Yano, Kenichi Oyaizu*
"Synergistic Iodination–Hydrogen Bonding Design Enables Thermostable and Ultrahigh Refractive Index Poly(dithioacetal)s"
ACS Macro Lett. 2026, 15, 917–923. (DOI: 10.1021/acsmacrolett.6c00231)
17. Daisuke Ito,* Keizo Inoue, Yuichi Fujioka, Teruhiko Miki, Shinsuke Ishikawa, Akihiko Happoya, Seigo Watanabe, Tomohiro Miura, Kenichi Oyaizu
"Novel polyphenylene sulfide resin for high-frequency copper-clad laminates with low dielectric tangent and flame retardancy"
Polymer 2025, 338, 129095. (DOI: 10.1016/j.polymer.2025.129095)
*Joint paper with Daicel Corporation
16. Seigo Watanabe, Yoshino Tsunekawa, Kenichi Oyaizu*
"Bleaching effect of high refractive index xylylic poly(thiourea)s with “de-conjugated” polarizable hydrogen bonds"
Chem. Commun. 2025, 61, 16002–16005. (DOI: 10.1039/D5CC03785A)
*Selected as Front Cover
15. Seigo Watanabe, Shuma Miura, Tomohiro Miura, Yoshino Tsunekawa, Daisuke Ito, Kenichi Oyaizu*
"Poly(phenylene sulfide) derivatives as ultralow dielectric loss materials with stable frequency response"
Commun. Mater. 2025, 6, 181. (DOI: 10.1038/s43246-025-00917-w)
*Joint paper with Daicel Corporation
*Press Release from Waseda University Japanese English
*Press Release from Daicel Corporation Japanese
*Highlighted in 日本経済新聞, 化学工業日報, 日刊工業新聞, Eurekalert!, and other media
14. Seigo Watanabe, Zexin An, Hiromichi Nishio, Yoshino Tsunekawa, Kenichi Oyaizu*
"Poly(dibenzothiophenylene sulfide)s: sulfur-rich annulated frameworks with a wide-range ultrahigh refractive index"
J. Mater. Chem. C 2025, 13, 7933–7942. (DOI: 10.1039/D4TC05458J)
*Selected as Inside Front Cover
13. Seigo Watanabe, Yoshino Tsunekawa, Kenichi Oyaizu*
"High Refractive Index Aromatic and Ether-Containing Polythioureas: Improving Transparency and Mechanical Properties via Reciprocal Hydrogen Bonds"
Macromol. Chem. Phys. 2025, 226, 2400456. (DOI: 10.1002/macp.202400456)
*Selected as Front Cover
12. Seigo Watanabe, Tomoya Yano, Zexin An, Kenichi Oyaizu*
“Aromatic Poly(dithioacetal)s: Spanning Degradability, Thermostability, and High Refractive Index Towards Eco-friendly Optics”
ChemSusChem 2025, 18, e202401609. (DOI: 10.1002/cssc.202401609)
*Selected as Inside Cover
11. Seigo Watanabe, Luca M. Cavinato, Vladimir Calvi, Richard van Rijn, Rubén D. Costa*, Kenichi Oyaizu*
“Polarizable H-bond Concept in Aromatic Poly(thiourea)s: Unprecedented High Refractive Index, Transmittance and Degradability at Force to Enhance Lighting Efficiency”
Adv. Funct. Mater. 2024, 34, 2404433. (DOI: 10.1002/adfm.202404433)
*Selected as "Top Viewed Article 2025"
*Joint paper with Prof. Costa Group (TUM, Germany) and Applied Nanolayers B.V. (Netherlands)
*Press Release from Waseda University Japanese English
*Highlighted in Nikkei XTech, EurekAlert!, and other media
10. Seigo Watanabe, Yoshino Tsunekawa, Teru Takayama, Kenichi Oyaizu*
“Diverse Side-chain Transformation of High Refractive Index Methylthio-substituted Poly(phenylene sulfide)s”
Macromolecules 2024, 57, 2897–2904. (DOI: 10.1021/acs.macromol.4c00054)
*Selected as Supplementary Cover
9. Seigo Watanabe, Hiromichi Nishio, Kenichi Oyaizu*
“Facile synthesis of telechelic poly(phenylene sulfide)s by means of electron-deficient aromatic sulfonium electrophiles”
RSC Adv. 2023, 13, 32363–32370. (DOI: 10.1039/D3RA06262G)
8. Kan Hatakeyama-Sato*, Seigo Watanabe, Naoki Yamane, Yasuhiko Igarashi, Kenichi Oyaizu*
“Using GPT-4 in Parameter Selection of Polymer Informatics: Improving Predictive Accuracy Amidst Data Scarcity and 'Ugly Duckling' Dilemma”
Digit. Discov. 2023, 2, 1548–1557. (DOI: 10.1039/D3DD00138E)
*Preprint is available on ChemRxiv (DOI: 10.26434/chemrxiv-2023-f9lxl)
*Joint paper with Dr. Hatakeyama-Sato (Tokyo Tech)
7. Seigo Watanabe, Hiromichi Nishio, Teru Takayama, Kenichi Oyaizu*
“Supramolecular Cross-Linking of Thiophenylene Polymers via Multiple Hydrogen Bonds toward High Refractive Index”
ACS Appl. Polym. Mater. 2023, 5, 2307–2311. (DOI: 10.1021/acsapm.3c00391)
6. Seigo Watanabe, Teru Takayama, Kenichi Oyaizu*
“Transcending the Trade-off in Refractive Index and Abbe Number for Highly Refractive Polymers: Synergistic Effect of Polarizable Skeletons and Robust Hydrogen Bonds”
ACS Polym. Au 2022, 2, 458–466. (DOI: 10.1021/acspolymersau.2c00030)
*Most Read Article
5. Seigo Watanabe, Teru Takayama, Hiromichi Nishio, Kanta Matsushima, Yoko Tanaka, Seiya Saito, Yushun Sun, Kenichi Oyaizu*
“Synthesis of colorless and high-refractive-index sulfoxide-containing polymers by the oxidation of poly(phenylene sulfide) derivatives”
Polym. Chem. 2022, 13, 1705–1711. (DOI: 10.1039/D1PY01654G)
4. Seigo Watanabe, Kenichi Oyaizu*
“Designing Ultrahigh-Refractive-Index Amorphous Poly(phenylene sulfide)s Based on Dense Intermolecular Hydrogen-Bond Networks”
Macromolecules 2022, 55, 2252–2259. (DOI: 10.1021/acs.macromol.1c02412)
*Selected as Front Cover
3. Seigo Watanabe, Seiya Saito, Motoyasu Hirai, Kenichi Oyaizu*
“Synthesis of methylated phenylene sulfide polymers via bulk oxidative polymerization and their heat curing triggered by dynamic disulfide exchange”
Polym. J. 2022, 54, 1–10. (DOI: 10.1038/s41428-021-00557-0)
*Selected as Featured Article (Jan. 2022)
*Top 5 Downloaded Article on Jan. 2022
2. Seigo Watanabe, Kenichi Oyaizu*
“Catechol End-Capped Poly(arylene sulfide) as a High-Refractive-Index “TiO2/ZrO2‑Nanodispersible” Polymer”
ACS Appl. Polym. Mater. 2021, 3, 4495–4503. (DOI: 10.1021/acsapm.1c00536)
*Selected as Supplementary Cover
1. Seigo Watanabe, Kenichi Oyaizu*
“Methoxy-Substituted Phenylenesulfide Polymer with Excellent Dispersivity of TiO2 Nanoparticles for Optical Application”
Bull. Chem. Soc. Jpn. 2020, 93, 1287–1292. (DOI: 10.1246/bcsj.20200170)
Reviews/Accounts
2. Seigo Watanabe, Kenichi Oyaizu*
“Emerging Low-Dielectric-Loss Polymers for Next-Generation GHz-Frequency Communications”
ACS Appl. Electron. Mater. 2026, 8, 3723–3761. (DOI: 10.1021/acsaelm.6c00342)
1. Seigo Watanabe, Kenichi Oyaizu*
“Designing Strategy for High Refractive Index Polymers: From the Molecular Level to Bulk Structure Control”
Bull. Chem. Soc. Jpn. 2023, 96, 1108–1128. (DOI: 10.1246/bcsj.20230177)
*Contribution to the special virtual issue “Controlled Chemical Construction (C3) for Advanced Functions”
*Selected as Inside Cover
日本語解説記事
3. 渡辺 清瑚, 小柳津 研一, "硫黄×水素結合のシナジーが切り拓く超高屈折率ポリマー"
高分子 2026, 75 (6), 264–265.
2. 渡辺 清瑚, 小柳津 研一, “含硫黄高屈折率ポリマーの新展開”
科学と工業 2026, 100 (2), 27–33.
1. 渡辺 清瑚, 小柳津 研一, “低誘電損失材料としての含硫黄芳香族ポリマー”
マテリアルステージ, 2025年10月号, 45–49.
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