Strongly enhanced polarization in a ferroelectric crystal by conduction-proton flow<\/p>\n
Junichi Yanagisawa, Takuya Aoyama, Kotaro Fujii, Masatomo Yashima, Yoshiyuki Inaguma, Akihide Kuwabara, Kazuki Shitara, Benjamin Le Ouay, Shinya Hayami, Masaaki Ohba, Ryo Ohtani<\/p>\n
Ion conductors comprising noncentrosymmetric frameworks have emerged as new functional materials. However, strongly correlated polarity functionality and ion transport have not been achieved. Herein, we report a ferroelectric proton conductor, K2MnN(CN)4\u00b7H2O (1\u00b7H2O), exhibiting the strong correlation between its polar skeleton and conductive ions that generate anomalous ferroelectricity via the proton-bias phenomenon. The application of an electric field of \u00b11 kV\/cm (0.1 Hz) on 1\u00b7H2O at 298 K produced the ferroelectricity (polarization = 1.5 \u00d7 104 \u03bcC\/cm2), which was enhanced by the ferroelectric-skeleton-trapped conductive protons. Furthermore, the strong polarity\u2013proton transport coupling of 1\u00b7H2O induced a proton-rectification-like directional ion-conductive behavior that could be adjusted by the magnitude and direction of DC electric fields. Moreover, 1\u00b7H2O exhibited reversible polarity switching between the polar 1\u00b7H2O and its dehydrated form, 1, with a centrosymmetric structure comprising an order\u2013disorder-type transition of the nitrido-bridged chains. Strongly enhanced polarization in a ferroelectric crystal by conduction-proton flow Junichi Yanagisawa, Takuya Aoyama, Kotaro Fujii, Masatomo Yashima, Yoshiyuki Inaguma, Akihide Kuwabara, Kazuki Shitara, Benjamin Le Ouay, Shinya Hayami, Masaaki Ohba, Ryo Ohtani Ion conductors comprising noncentrosymmetric frameworks have emerged as new functional materials. However, strongly correlated polarity functionality and ion transport have not been […]<\/p>\n","protected":false},"author":222414606,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_themeisle_gutenberg_block_has_review":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_locale":"en_US","_original_post":"https:\/\/supraceramics.jp\/?p=1866","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[124830],"tags":[],"class_list":["post-1871","post","type-post","status-publish","format-standard","hentry","category-news","en-US"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pe2JgX-ub","jetpack-related-posts":[{"id":1866,"url":"https:\/\/supraceramics.jp\/2024\/01\/1866\/","url_meta":{"origin":1871,"position":0},"title":"Publication | J. Am. Chem. Soc. (Ohtani, Fujii, Kuwabara et al.) \u201cStrongly enhanced polarization in a ferroelectric crystal by conduction-proton flow\u201d","author":"shorike","date":"2024\u5e741\u67085\u65e5","format":false,"excerpt":"\u5171\u540c\u7814\u7a76\u6210\u679c\uff1a\u5de8\u5927\u306a\u5f37\u8a98\u96fb\u30d2\u30b9\u30c6\u30ea\u30b7\u30b9\u3092\u793a\u3059\u6975\u6027\u30a4\u30aa\u30f3\u4f1d\u5c0e\u4f53\uff08A02\u5927\u8c37\u3001B03\u85e4\u4e95\u3001B02\u6851\u539f\uff09 Strongly enhanced polarization in a ferroelectric crystal by conduction-proton flow Junichi Yanagisawa, Takuya Aoyama, Kotaro Fujii, Masatomo Yashima, Yoshiyuki Inaguma, Akihide Kuwabara, Kazuki Shitara, Benjamin Le Ouay, Shinya Hayami, Masaaki Ohba, Ryo Ohtani \u672c\u7814\u7a76\u3067\u306f\u3001\u300c\u5f37\u8a98\u96fb\u30a4\u30aa\u30f3\u4f1d\u5c0e\u4f53\u300d\u3068\u3044\u3046\u8d85\u30bb\u30e9\u30df\u30c3\u30af\u30b9\u306a\u3089\u3067\u306f\u306e\u6a5f\u80fd\u6027\u6750\u6599\u3092\u958b\u767a\u3057\u307e\u3057\u305f\u3002\u4e00\u822c\u7684\u306b\u3001\u30a4\u30aa\u30f3\u4f1d\u5c0e\u4f53\u306f\u5f37\u8a98\u96fb\u6027\u3092\u793a\u3055\u306a\u3044\u3068\u8003\u3048\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u306a\u304c\u3089\u4eca\u56de\u3001\u6975\u6027\u7d50\u6676 K2MnN(CN)4\u00d7H2O \u304c\u5ba4\u6e29\u30fb\u6e7f\u5ea680\uff05\u306b\u304a\u3044\u30661.3*10-5 S\/cm \u306e\u30d7\u30ed\u30c8\u30f3\u4f1d\u5c0e\u6027\u3092\u793a\u3059\u3068\u3068\u3082\u306b\u30011kV\/cm\u306e\u5370\u53ef\u96fb\u5727\u306715 mC\/cm2 \u3068\u3044\u3046\u5de8\u5927\u306a\u5206\u6975\u5024\u3092\u3082\u3064\u5f37\u8a98\u96fb\u4f53\u3068\u3057\u3066\u3082\u6a5f\u80fd\u3059\u308b\u3053\u3068\u3092\u898b\u51fa\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u3001\u30c1\u30bf\u30f3\u9178\u30d0\u30ea\u30a6\u30e0\u306a\u3069\u5f93\u6765\u306e\u30bb\u30e9\u30df\u30c3\u30af\u30b9\u7cfb\u5f37\u8a98\u96fb\u4f53\u306e500\u500d\u4ee5\u4e0a\u306e\u5024\u3067\u3042\u308a\u3001\u6975\u6027\u6750\u6599\u958b\u767a\u306b\u30a4\u30aa\u30f3\u4f1d\u5c0e\u3092\u5229\u7528\u3059\u308b\u65b0\u305f\u306a\u6307\u91dd\u3092\u793a\u3059\u7d50\u679c\u3067\u3059\u3002 J. Am. Chem. Soc., 146, 1476-1483 (2024). (DOI: 10.1021\/jacs.3c10841)","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2056,"url":"https:\/\/supraceramics.jp\/en\/2025\/06\/2056\/","url_meta":{"origin":1871,"position":1},"title":"Publication | J. Mater. Chem. A (Motohashi, Kageyama, Takeiri et al.) \u201cThermally stable proton-conducting oxy-hydroxides synthesized in concentrated water vapor\u201d","author":"shorike","date":"2025\u5e746\u670810\u65e5","format":false,"excerpt":"Thermally stable proton-conducting oxy-hydroxides synthesized in concentrated water vapor Kenji Arai, Yoko Kokubo, Yusuke Asai, Satoshi Ogawa, *Miwa Saito, Maria Kirsanova, Iaroslava Shakhova, Artem Abakumov, Fumitaka Takeiri, Hiroshi Kageyama, *Teruki Motohashi The diverse functionalities of (oxy-)hydroxides, such as electrocatalytic activity of transition-metal oxy-hydroxides in the oxygen evolution reaction (OER) and\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2175,"url":"https:\/\/supraceramics.jp\/en\/2025\/09\/2175\/","url_meta":{"origin":1871,"position":2},"title":"Publication | Inorg. Chem. (Motohashi, Nambu, Kimoto, Sugimoto, Inada et al.) \u201cA Sr-Ga Oxy-Hydroxide with High Thermal Stability: Unraveling Its Characteristic Hydrogen-Bond Network\u201d","author":"shorike","date":"2025\u5e749\u670826\u65e5","format":false,"excerpt":"A Sr-Ga Oxy-Hydroxide with High Thermal Stability: Unraveling Its Characteristic Hydrogen-Bond Network Yusuke Asai, Yuto Nishihara, Yoko Kokubo, Kenji Arai, Kosaku Ohishi, Satoshi Ogawa, Miwa Saito, Yusuke Nambu, Maxim Avdeev, Koji Kimoto, Zi Lang Goo, Kunihisa Sugimoto, Miki Inada, Katsuro Hayashi, Teruki Motohashi Oxy-hydroxides represent potential proton carriers for solid\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1828,"url":"https:\/\/supraceramics.jp\/en\/2024\/10\/1828\/","url_meta":{"origin":1871,"position":3},"title":"A review paper on superceramics published in Sci. Technol. Adv. Mater.","author":"shorike","date":"2024\u5e7410\u670817\u65e5","format":false,"excerpt":"A review article summarizing the progress of superceramics has been published in Sci. Technol. Adv. Mater. The article begins with the concept of superceramics, which reconstructs the science of inorganic materials by focusing on molecular units, and covers a wide range of achievements. Supra-ceramics: a molecule-driven frontier of inorganic materials\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1216,"url":"https:\/\/supraceramics.jp\/2022\/12\/1216\/","url_meta":{"origin":1871,"position":4},"title":"The 1st Symposium on Materials Chemistry for New Properties and Functions","author":"shorike","date":"2022\u5e7412\u670811\u65e5","format":false,"excerpt":"The 2nd Symposium on Materials Chemistry for New Properties and Functions Ookayama Main building 3F Room 345 (\u7b2c2 \u4f1a\u8b70\u5ba4), Tokyo Institute of Technology 5 December, 2022 Program: 9:30 Opening (Kazuhiko Maeda, Tokyo Tech) 9:35 Development of Sustainable and Safe Synthesis Method of Metal Oxynitrides Using Solid-Nitriding Agents (Kiyofumi Katagiri, Hiroshima\u2026","rel":"","context":"In "Event"","block_context":{"text":"Event","link":"https:\/\/supraceramics.jp\/en\/category\/event\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1850,"url":"https:\/\/supraceramics.jp\/en\/2024\/08\/1850\/","url_meta":{"origin":1871,"position":5},"title":"Publication | Inorg. Chem. (Katagiri, Sugimoto, Motohashi et al.) \u201cMechanistic Insights on the Formation of a Carbodiimide Ion from Urea in La2O2NCN Synthesis Based on the \u201cProanion\u201d Strategy\u201d","author":"shorike","date":"2024\u5e748\u67088\u65e5","format":false,"excerpt":"Mechanistic Insights on the Formation of a Carbodiimide Ion from Urea in La2O2NCN Synthesis Based on the \u201cProanion\u201d Strategy Oomi Sumioka, Naoki Tarutani, Kiyofumi Katagiri, Kei Inumaru, Zi Lang Goo, Kunihisa Sugimoto, Yusuke Asai, Miwa Saito, and Teruki Motohashi This study affords mechanistic insights into the formation mechanism of carbodiimide\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/posts\/1871","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/users\/222414606"}],"replies":[{"embeddable":true,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/comments?post=1871"}],"version-history":[{"count":1,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/posts\/1871\/revisions"}],"predecessor-version":[{"id":1873,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/posts\/1871\/revisions\/1873"}],"wp:attachment":[{"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/media?parent=1871"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/categories?post=1871"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/tags?post=1871"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n<\/a>
\n
\nJ. Am. Chem. Soc.<\/em>, 146, 1476-1483 (2024). (DOI: 10.1021\/jacs.3c10841)
\n<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"