{"title":"富（001）Facet TiO2纳米晶体催化的胺和n -杂环的可见光驱动好氧氧化","authors":"Raji Vadakkekara","doi":"10.1007/s10562-025-05006-8","DOIUrl":null,"url":null,"abstract":"<div><p>This article reports a facile, fluoride-free hydrothermal synthesis of highly active anatase TiO<sub>2</sub> nanocrystals with a high percentage of (001) facets. These (001)-faceted TiO<sub>2</sub> catalysts exhibit remarkable activity in the visible-light-induced oxidation of various amines, including aliphatic, primary, secondary amines, and N-heterocycles, as well as in amine cross-coupling reactions under ambient air conditions. The high reactivity is attributed to the formation of a surface complex between the amine and the TiO<sub>2</sub> (001) facet, which acts as a visible-light sensitizer, modifying the band structure of TiO<sub>2</sub> and facilitating efficient charge separation and subsequent oxidation processes. Notably, these reactions proceed effectively under visible light irradiation despite the inherent UV-light absorption of TiO<sub>2</sub>. The catalyst demonstrates excellent recyclability with minimal activity loss over six cycles and can be utilized for the gram-scale synthesis of imines, making it a promising and sustainable approach for amine oxidation reactions.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 5","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Visible Light Driven Aerobic Oxidation of Amines and N-Heterocycles Catalyzed by (001) Facet Rich TiO2 Nanocrystals\",\"authors\":\"Raji Vadakkekara\",\"doi\":\"10.1007/s10562-025-05006-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This article reports a facile, fluoride-free hydrothermal synthesis of highly active anatase TiO<sub>2</sub> nanocrystals with a high percentage of (001) facets. These (001)-faceted TiO<sub>2</sub> catalysts exhibit remarkable activity in the visible-light-induced oxidation of various amines, including aliphatic, primary, secondary amines, and N-heterocycles, as well as in amine cross-coupling reactions under ambient air conditions. The high reactivity is attributed to the formation of a surface complex between the amine and the TiO<sub>2</sub> (001) facet, which acts as a visible-light sensitizer, modifying the band structure of TiO<sub>2</sub> and facilitating efficient charge separation and subsequent oxidation processes. Notably, these reactions proceed effectively under visible light irradiation despite the inherent UV-light absorption of TiO<sub>2</sub>. The catalyst demonstrates excellent recyclability with minimal activity loss over six cycles and can be utilized for the gram-scale synthesis of imines, making it a promising and sustainable approach for amine oxidation reactions.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"155 5\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2025-04-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-025-05006-8\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-025-05006-8","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Visible Light Driven Aerobic Oxidation of Amines and N-Heterocycles Catalyzed by (001) Facet Rich TiO2 Nanocrystals
This article reports a facile, fluoride-free hydrothermal synthesis of highly active anatase TiO2 nanocrystals with a high percentage of (001) facets. These (001)-faceted TiO2 catalysts exhibit remarkable activity in the visible-light-induced oxidation of various amines, including aliphatic, primary, secondary amines, and N-heterocycles, as well as in amine cross-coupling reactions under ambient air conditions. The high reactivity is attributed to the formation of a surface complex between the amine and the TiO2 (001) facet, which acts as a visible-light sensitizer, modifying the band structure of TiO2 and facilitating efficient charge separation and subsequent oxidation processes. Notably, these reactions proceed effectively under visible light irradiation despite the inherent UV-light absorption of TiO2. The catalyst demonstrates excellent recyclability with minimal activity loss over six cycles and can be utilized for the gram-scale synthesis of imines, making it a promising and sustainable approach for amine oxidation reactions.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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