{"id":1850,"date":"2024-08-08T14:38:53","date_gmt":"2024-08-08T05:38:53","guid":{"rendered":"https:\/\/supraceramics.jp\/?p=1850"},"modified":"2025-02-05T14:39:09","modified_gmt":"2025-02-05T05:39:09","slug":"publication-inorg-chem-katagiri-sugimoto-motohashi-et-al-mechanistic-insights-on-the-formation-of-a-carbodiimide-ion-from-urea-in-la2o2ncn-synthesis-based-on-the-proanion","status":"publish","type":"post","link":"https:\/\/supraceramics.jp\/en\/2024\/08\/1850\/","title":{"rendered":"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"},"content":{"rendered":"<p>Mechanistic Insights on the Formation of a Carbodiimide Ion from Urea in La2O2NCN Synthesis Based on the \u201cProanion\u201d Strategy<\/p>\n<p>Oomi Sumioka, Naoki Tarutani, Kiyofumi Katagiri, Kei Inumaru, Zi Lang Goo, Kunihisa Sugimoto, Yusuke Asai, Miwa Saito, and Teruki Motohashi<\/p>\n<p>This study affords mechanistic insights into the formation mechanism of carbodiimide ions (NCN<sup>2\u2013<\/sup>) from urea during the synthesis of La<sub>2<\/sub>O<sub>2<\/sub>NCN by employing the \u201cproanion\u201d strategy without using NH<sub>3<\/sub> gas. It is a safer, cost-effective, and environmentally friendly approach. Urea, acting as a proanion, decomposes upon heating, facilitating conversion to NCN<sup>2\u2013<\/sup>. This work meticulously examines the phase transitions and identifies intermediate species formed during the reaction using <i>in situ<\/i> X-ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric\u2013differential thermal analysis\u2013mass spectrometry. The findings present a detailed mechanism in which urea initially decomposes at 140 \u00b0C, releasing HNCO, which reacts with La(OH)<sub>3<\/sub> to immobilize NCO<sup>\u2013<\/sup> species on the surface of La(OH)<sub>3<\/sub>. As the temperature reaches approximately 400 \u00b0C, these NCO<sup>\u2013<\/sup> anions transform into NCN<sup>2\u2013<\/sup> anions by releasing CO<sub>2<\/sub> gas, resulting in the formation of an amorphous phase rich in NCN<sup>2\u2013<\/sup>. Following further heating to 600 \u00b0C, La<sub>2<\/sub>O<sub>2<\/sub>NCN crystallizes, enhancing its crystallinity as the temperature increases. These findings elucidate the formation mechanism of La<sub>2<\/sub>O<sub>2<\/sub>NCN, introduce the \u201cproanion method\u201d for the alternative synthesis of metal (oxy)carbodiimides, and expand their potential for applications as functional materials.<\/p>\n<p><a href=\" https:\/\/pubs.acs.org\/doi\/full\/10.1021\/acs.inorgchem.4c02260 \"><br \/>\n<em>Inorg. Chem.<\/em>, ASAP (2024). (DOI: 10.1021\/acs.inorgchem.4c02260)<br \/>\n<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>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 ions (NCN2\u2013) from urea during [&hellip;]<\/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=1156","_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-1850","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-tQ","jetpack-related-posts":[{"id":1156,"url":"https:\/\/supraceramics.jp\/2024\/08\/1156\/","url_meta":{"origin":1850,"position":0},"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":"\u5171\u540c\u7814\u7a76\u6210\u679c\uff1aLa2O2NCN\u306e\u300c\u30d7\u30ed\u30a2\u30cb\u30aa\u30f3\u5408\u6210\u300d\u306b\u304a\u3051\u308b\u5c3f\u7d20\u304b\u3089\u306e\u30ab\u30eb\u30dc\u30b8\u30a4\u30df\u30c9\u30a4\u30aa\u30f3\u306e\u5f62\u6210\u306b\u95a2\u3059\u308b\u6a5f\u69cb\u7684\u6d1e\u5bdf\uff08A01\u7247\u6850\u3001B01\u6749\u672c\u3001A01\u672c\u6a4b\u3089\uff09 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 \u672c\u9818\u57df\u3067\u306f\u3001\u5185\u570f\u578b\u8d85\u30bb\u30e9\u30df\u30c3\u30af\u30b9\u3068\u3057\u3066\u91d1\u5c5e(\u30aa\u30ad\u30b7)\u30ab\u30eb\u30dc\u30b8\u30a4\u30df\u30c9\u5316\u5408\u7269\u306b\u7740\u76ee\u3057\u3066\u304a\u308a\u3001\u305d\u306e\u5408\u6210\u6cd5\u3068\u3057\u3066\u3001\u300c\u30d7\u30ed\u30a2\u30cb\u30aa\u30f3\u300d(\u5408\u6210\u904e\u7a0b\u3067\u30a2\u30cb\u30aa\u30f3\u306b\u5909\u5316\u3059\u308b\u524d\u99c6\u7269\u8cea)\u3092\u7528\u3044\u305f\u65b0\u624b\u6cd5\u3092\u63d0\u6848\u3057\u3066\u3044\u307e\u3059\u3002 \u672c\u7814\u7a76\u3067\u306f\u3001\u5c3f\u7d20\u3092\u30ab\u30eb\u30dc\u30b8\u30a4\u30df\u30c9\u30a4\u30aa\u30f3\uff08NCN2\u2013\uff09\u306e\u30d7\u30ed\u30a2\u30cb\u30aa\u30f3\u3068\u3057\u3066\u7528\u3044\u305fLa2O2NCN\u306e\u5408\u6210\u306b\u304a\u3044\u3066\u3001NCN2\u2013\u30a4\u30aa\u30f3\u3078\u306e\u5909\u63db\u904e\u7a0b\u3092in situ X\u7dda\u56de\u6298\u3001\u30d5\u30fc\u30ea\u30a8\u5909\u63db\u8d64\u5916\u5206\u5149\u6cd5\u3001\u71b1\u91cd\u91cf\u30fb\u8cea\u91cf\u5206\u6790\u3092\u7528\u3044\u3066\u660e\u3089\u304b\u306b\u3057\u307e\u3057\u305f\u3002\u5c3f\u7d20\u306e\u71b1\u5206\u89e3\u306b\u3088\u308a\u751f\u3058\u305fHNCO\u304cLa(OH)3\u3068\u53cd\u5fdc\u3057\u3001NCO\u2013\u7a2e\u304c\u8868\u9762\u306b\u56fa\u5b9a\u3055\u308c\u3001\u3053\u308c\u304c\u9ad8\u6e29\u5ea6\u57df\u3067NCN2\u2013\u306b\u5909\u63db\u3055\u308c\u3001\u6700\u7d42\u7684\u306bLa2O2NCN\u3068\u3057\u3066\u7d50\u6676\u5316\u3059\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u767a\u898b\u306f\u3001\u8d85\u30bb\u30e9\u30df\u30c3\u30af\u30b9\u306e\u65b0\u898f\u5408\u6210\u6cd5\u300c\u30d7\u30ed\u30a2\u30cb\u30aa\u30f3\u6cd5\u300d\u306e\u5b66\u7406\u69cb\u7bc9\u306b\u5411\u3051\u305f\u91cd\u8981\u306a\u6210\u679c\u3068\u4f4d\u7f6e\u3065\u3051\u3089\u308c\u307e\u3059\u3002\u3002 Inorg. Chem., ASAP (2024). (DOI: 10.1021\/acs.inorgchem.4c02260)","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1958,"url":"https:\/\/supraceramics.jp\/en\/2025\/03\/1958\/","url_meta":{"origin":1850,"position":1},"title":"Publication | J. Am. Chem. Soc. (Masubuchi, Hongo, Maezono, Kageyama, et al.) \u201cHand milling induced phase transition for marcasite-type carbodiimide\u201d","author":"shorike","date":"2025\u5e743\u670831\u65e5","format":false,"excerpt":"Hand milling induced phase transition for marcasite-type carbodiimide Yuzuki Yamamoto, Kazuki Kume, Suzuka Miyazaki, Ayako Shinozaki, Peng Song, Sayed Sahriar Hasan, Kenta Hongo, Ryo Maezono, Hiroki Ubukata, Hiroshi Kageyama, Mikio Higuchi, Yuji Masubuchi While high-pressure phase transitions have been widely studied in inorganic compounds such as oxides and chalcogenides, relatively\u2026","rel":"","context":"In &quot;News&quot;","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":1850,"position":2},"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 &quot;Event&quot;","block_context":{"text":"Event","link":"https:\/\/supraceramics.jp\/en\/category\/event\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2308,"url":"https:\/\/supraceramics.jp\/en\/2026\/02\/2308\/","url_meta":{"origin":1850,"position":3},"title":"Publication | Artif. Photosynth. (Onda, Maeda et al.) \u201cDesign Strategy for Heteroleptic Ir(III) Photosensitizers with Spatially Separated Excited Electrons toward Efficient CO2 Reduction\u201d","author":"shorike","date":"2026\u5e742\u670812\u65e5","format":false,"excerpt":"Hybrid photocatalysts that integrate functional molecular units with semiconductor surfaces offer a promising route toward efficient artificial photosynthesis, yet controlling interfacial charge transfer dynamics remains a major challenge. Here we report a series of heteroleptic Ir(III) complex photosensitizers bearing 1-phenylisoquinoline ligands with phosphonic acid anchoring groups, designed to regulate the\u2026","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2088,"url":"https:\/\/supraceramics.jp\/en\/2025\/07\/2088\/","url_meta":{"origin":1850,"position":4},"title":"Publication | Angew. Chem. Int. Ed. (Minato, Sadakane et al.) \u201cA Structure-Preserving, Dimensionality-Increasing Strategy for the Stepwise Synthesis of Microporous \u03b1-MoO3 with a Broad (100) Surface\u201d","author":"shorike","date":"2025\u5e747\u67082\u65e5","format":false,"excerpt":"A Structure-Preserving, Dimensionality-Increasing Strategy for the Stepwise Synthesis of Microporous \u03b1-MoO3 with a Broad (100) Surface Takuo Minato*, Misato Miyamoto, Satoshi Ishikawa, Norihito Hiyoshi, Makoto Maeda, Kenji Komaguchi, Masahiro Sadakane Metal oxides with diverse structures and dimensionalities are typically synthesized via solid-state or hydrothermal reactions. However, it is quite difficult\u2026","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2312,"url":"https:\/\/supraceramics.jp\/en\/2026\/02\/2312\/","url_meta":{"origin":1850,"position":5},"title":"Publication | Chem. Mater. (Motohashi, Sugimoto, et al.) \u201cUnconventional Oxygen Storage\/Release Properties of Melilite-Type Ba2MnGe2O7+\u03b4 Associated with Complex Structural Transformation\u201d","author":"shorike","date":"2026\u5e742\u670816\u65e5","format":false,"excerpt":"Unconventional Oxygen Storage\/Release Properties of Melilite-Type Ba2MnGe2O7+\uf064 Associated with Complex Structural Transformation Kosaku Ohishi, Satoshi Ogawa, Hisanori Yamane, Saburo Hosokawa, Zi Lang Goo, Kunihisa Sugimoto, Miwa Saito, Teruki Motohashi Here, we report the synthesis and characterization of melilite-type A2MnC2O7 (A = Sr, Ba; C = Si, Ge) and the discovery\u2026","rel":"","context":"In &quot;News&quot;","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\/1850","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=1850"}],"version-history":[{"count":2,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/posts\/1850\/revisions"}],"predecessor-version":[{"id":1852,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/posts\/1850\/revisions\/1852"}],"wp:attachment":[{"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/media?parent=1850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/categories?post=1850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/tags?post=1850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}