{"id":2537,"date":"2026-04-22T10:16:04","date_gmt":"2026-04-22T01:16:04","guid":{"rendered":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/?p=2537"},"modified":"2026-04-21T10:31:07","modified_gmt":"2026-04-21T01:31:07","slug":"%e8%ab%96%e6%96%87%e3%81%8c%e6%8e%b2%e8%bc%89%e3%81%95%e3%82%8c%e3%81%be%e3%81%97%e3%81%9f-3","status":"publish","type":"post","link":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/2026\/04\/22\/%e8%ab%96%e6%96%87%e3%81%8c%e6%8e%b2%e8%bc%89%e3%81%95%e3%82%8c%e3%81%be%e3%81%97%e3%81%9f-3\/","title":{"rendered":"\u8ad6\u6587\u304c\u63b2\u8f09\u3055\u308c\u307e\u3057\u305f"},"content":{"rendered":"\n<p><\/p>\n\n\n\n<p>\u8ad6\u6587\u304c\u3001Organic Electronics\u306b\u63b2\u8f09\u3055\u308c\u307e\u3057\u305f\u3002\u305c\u3072\u3001\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<br><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\">Side-chain engineering of oligothiophene-extended triphenylamines for stable radical cations with NIR-II to NIR-III absorption<\/h3>\n\n\n\n<p>Masafumi\u00a0Yano\u00a0,\u00a0Koji\u00a0Yamashita\u00a0,\u00a0Minori\u00a0Yano\u00a0,\u00a0Yoshitsugu\u00a0Komai\u00a0,\u00a0Yuki\u00a0Arikata\u00a0,\u00a0Koichi\u00a0Mitsudo\u00a0,\u00a0Yukiyasu\u00a0Kashiwagi\u00a0<\/p>\n\n\n\n<p><a href=\"https:\/\/doi.org\/10.1016\/j.orgel.2026.107415\">https:\/\/doi.org\/10.1016\/j.orgel.2026.107415<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"font-size:clamp(1.039rem, 1.039rem + ((1vw - 0.2rem) * 1.02), 1.6rem);\"><strong>Abstract<\/strong><\/h2>\n\n\n\n<p>Bithiophene- and terthiophene-appended triphenylamine (TPA) derivatives were synthesized and systematically investigated. Upon one-electron oxidation, these compounds generated stable radical cations exhibiting intense near-infrared (NIR) absorption. The bithiophene derivatives combined sufficient solubility with strong NIR-II absorption, whereas the corresponding terthiophene analogues showed further bathochromic shifts but suffered from extremely poor solubility. Incorporation of branched alkyl substituents effectively restored solubility. Notably, the branched terthiophene radical cation displayed an absorption maximum beyond 1900&nbsp;nm, representing one of the longest wavelengths reported for TPA-based radical cations. These findings establish \u03c0-extension and side-chain engineering as complementary strategies for the rational design of soluble and stable radical-cation dyes with NIR-II to NIR-III absorption.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"189\" src=\"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-content\/uploads\/sites\/88\/2026\/04\/image-2.png\" alt=\"\" class=\"wp-image-2538\" style=\"width:582px;height:auto\" srcset=\"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-content\/uploads\/sites\/88\/2026\/04\/image-2.png 500w, https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-content\/uploads\/sites\/88\/2026\/04\/image-2-300x113.png 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8ad6\u6587\u304c\u3001Organic Electronics\u306b\u63b2\u8f09\u3055\u308c\u307e\u3057\u305f\u3002\u305c\u3072\u3001\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 Side-chain engineering of oligothiophene-extended triphenylamines f [&hellip;]<\/p>\n","protected":false},"author":97,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2537","post","type-post","status-publish","format-standard","hentry","category-seminor"],"_links":{"self":[{"href":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-json\/wp\/v2\/posts\/2537","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-json\/wp\/v2\/users\/97"}],"replies":[{"embeddable":true,"href":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-json\/wp\/v2\/comments?post=2537"}],"version-history":[{"count":1,"href":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-json\/wp\/v2\/posts\/2537\/revisions"}],"predecessor-version":[{"id":2539,"href":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-json\/wp\/v2\/posts\/2537\/revisions\/2539"}],"wp:attachment":[{"href":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-json\/wp\/v2\/media?parent=2537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-json\/wp\/v2\/categories?post=2537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wps.itc.kansai-u.ac.jp\/kozoyuki\/wp-json\/wp\/v2\/tags?post=2537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}