{"title":"通过电化学异质氧化还原反应调控表面状态,实现全彩发光碳点。","authors":"Jinli Li, Chengxiang Sun, Qiang Li, Xiran Xu, Baolin Li, Yijia Tian, Dianyuan Zheng, Rongbin Yao, Kang Yuan, Ziyang Guo","doi":"10.1002/cssc.202401313","DOIUrl":null,"url":null,"abstract":"<p>Carbon dots (CDs) still suffer from unclear surface state fluorescence mechanism for fine modulation. Here, redox reactions for cathode and anode within electrochemical method are firstly employed to construct differentiated strategy for surface-state modulation, so as to obtain CDs with controllable emission in separated electrodes simultaneously. The fluorescence peaks of CDs from blue to red centered at 425 nm (mCDs−), 530 nm (mCDs+), 580 nm (oCDs−) and 665 nm (oCDs+) are mainly originated from the different bombardment effects of the ions and reaction tendencies of modifier during the electrolysis process. The phenylenediamine (as modifier) tends to introduce the amino groups on the surface of CDs- while introduced nitrogen atoms into the carbon nucleus skeleton around the anode, thus leading to much larger size and the formation of the graphite N for CDs+. It is the different surface states formed by phenylenediamine and the absorption redshift triggered by graphite N that ensures the tunable emission. The improved electrochemical method is of great significance for finely spectra modulation and efficient synthesis.</p>","PeriodicalId":149,"journal":{"name":"ChemSusChem","volume":"18 2","pages":""},"PeriodicalIF":7.5000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Surface State Modulation via Electrochemical Heterogeneous Redox Reactions for Full-Color Emission Carbon Dots\",\"authors\":\"Jinli Li, Chengxiang Sun, Qiang Li, Xiran Xu, Baolin Li, Yijia Tian, Dianyuan Zheng, Rongbin Yao, Kang Yuan, Ziyang Guo\",\"doi\":\"10.1002/cssc.202401313\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Carbon dots (CDs) still suffer from unclear surface state fluorescence mechanism for fine modulation. Here, redox reactions for cathode and anode within electrochemical method are firstly employed to construct differentiated strategy for surface-state modulation, so as to obtain CDs with controllable emission in separated electrodes simultaneously. The fluorescence peaks of CDs from blue to red centered at 425 nm (mCDs−), 530 nm (mCDs+), 580 nm (oCDs−) and 665 nm (oCDs+) are mainly originated from the different bombardment effects of the ions and reaction tendencies of modifier during the electrolysis process. The phenylenediamine (as modifier) tends to introduce the amino groups on the surface of CDs- while introduced nitrogen atoms into the carbon nucleus skeleton around the anode, thus leading to much larger size and the formation of the graphite N for CDs+. It is the different surface states formed by phenylenediamine and the absorption redshift triggered by graphite N that ensures the tunable emission. The improved electrochemical method is of great significance for finely spectra modulation and efficient synthesis.</p>\",\"PeriodicalId\":149,\"journal\":{\"name\":\"ChemSusChem\",\"volume\":\"18 2\",\"pages\":\"\"},\"PeriodicalIF\":7.5000,\"publicationDate\":\"2024-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ChemSusChem\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/cssc.202401313\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ChemSusChem","FirstCategoryId":"92","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/cssc.202401313","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
碳点(CD)的表面态荧光精细调控机制尚不明确。本文首先利用电化学方法中阴极和阳极的氧化还原反应,构建了表面状态调控的差异化策略,从而在分离的电极中同时获得可控发射的碳点。在电解过程中,离子的轰击效应和改性剂的反应趋势各不相同,从而产生了以 425 nm(mCDs-)、530 nm(mCDs+)、580 nm(oCDs-)和 665 nm(oCDs+)为中心的由蓝到红的 CD 荧光峰。苯二胺(作为改性剂)倾向于在 CDs- 表面引入氨基,而在阳极周围的碳核骨架中引入氮原子,从而导致 CDs+ 的尺寸更大,并形成石墨 N。正是苯二胺形成的不同表面态和石墨 N 引发的吸收重移确保了可调发射。改进的电化学方法对于精细调制光谱和高效合成具有重要意义。
Surface State Modulation via Electrochemical Heterogeneous Redox Reactions for Full-Color Emission Carbon Dots
Carbon dots (CDs) still suffer from unclear surface state fluorescence mechanism for fine modulation. Here, redox reactions for cathode and anode within electrochemical method are firstly employed to construct differentiated strategy for surface-state modulation, so as to obtain CDs with controllable emission in separated electrodes simultaneously. The fluorescence peaks of CDs from blue to red centered at 425 nm (mCDs−), 530 nm (mCDs+), 580 nm (oCDs−) and 665 nm (oCDs+) are mainly originated from the different bombardment effects of the ions and reaction tendencies of modifier during the electrolysis process. The phenylenediamine (as modifier) tends to introduce the amino groups on the surface of CDs- while introduced nitrogen atoms into the carbon nucleus skeleton around the anode, thus leading to much larger size and the formation of the graphite N for CDs+. It is the different surface states formed by phenylenediamine and the absorption redshift triggered by graphite N that ensures the tunable emission. The improved electrochemical method is of great significance for finely spectra modulation and efficient synthesis.
期刊介绍:
ChemSusChem
Impact Factor (2016): 7.226
Scope:
Interdisciplinary journal
Focuses on research at the interface of chemistry and sustainability
Features the best research on sustainability and energy
Areas Covered:
Chemistry
Materials Science
Chemical Engineering
Biotechnology