{"title":"界面亲核取代反应驱动的 Ag2Te 量子点精确生长","authors":"Zheng Li, Jun Xu, Wei Xie, Dongbing Zhao, Zhen-Ya Liu, Xian Yang, Haohao Fu, Shijia Jiang, Wei Zhao, Ming-Yu Zhang, An-An Liu, Dai-Wen Pang","doi":"10.1021/acs.chemmater.4c00026","DOIUrl":null,"url":null,"abstract":"Surface ligands of quantum dots (QDs) play pivotal roles in determining their optical properties and stability during the growth process. The stability and continuous growth of nanocrystals are crucial to precisely tuning their properties. However, the dilemma surrounding the stability of nanocrystals and their continuous growth remains unsolved, posing a formidable challenge. Herein, we have proposed a strategy for precise tuning of Ag<sub>2</sub>Te QD growth driven by nucleophilic substitution reaction (SN2) between surface-bound thiol ligands and halogenated hydrocarbons (RX, X = Cl, Br, I), prompted by the generation of silver halide precipitate. As a result, Ag<sub>2</sub>Te QDs with emission wavelengths precisely and continuously tunable in the range of 1176–2023 nm have been successfully synthesized in one pot. As the reaction advances, the quantity of the more strongly coordinating RS<sup>–</sup> gradually diminishes, while that of the weaker coordinating dioctyl sulfide gradually increases. This dynamic process enables the growth of the QDs. The rate of the SN2 reaction can be adjusted by varying the species and concentration of RX, as well as the amount of Ag species, significantly influencing the growth rate of the QDs, a crucial factor for resolving the dilemma between the stability and tunability of the QDs. Additionally, this proposed strategy holds the potential to modulate the properties of various nanoparticles through chemical reactions at the interfaces.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":null,"pages":null},"PeriodicalIF":7.2000,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Interface Nucleophilic Substitution Reaction-Driven Precise Growth of Ag2Te Quantum Dots\",\"authors\":\"Zheng Li, Jun Xu, Wei Xie, Dongbing Zhao, Zhen-Ya Liu, Xian Yang, Haohao Fu, Shijia Jiang, Wei Zhao, Ming-Yu Zhang, An-An Liu, Dai-Wen Pang\",\"doi\":\"10.1021/acs.chemmater.4c00026\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Surface ligands of quantum dots (QDs) play pivotal roles in determining their optical properties and stability during the growth process. The stability and continuous growth of nanocrystals are crucial to precisely tuning their properties. However, the dilemma surrounding the stability of nanocrystals and their continuous growth remains unsolved, posing a formidable challenge. Herein, we have proposed a strategy for precise tuning of Ag<sub>2</sub>Te QD growth driven by nucleophilic substitution reaction (SN2) between surface-bound thiol ligands and halogenated hydrocarbons (RX, X = Cl, Br, I), prompted by the generation of silver halide precipitate. As a result, Ag<sub>2</sub>Te QDs with emission wavelengths precisely and continuously tunable in the range of 1176–2023 nm have been successfully synthesized in one pot. As the reaction advances, the quantity of the more strongly coordinating RS<sup>–</sup> gradually diminishes, while that of the weaker coordinating dioctyl sulfide gradually increases. This dynamic process enables the growth of the QDs. The rate of the SN2 reaction can be adjusted by varying the species and concentration of RX, as well as the amount of Ag species, significantly influencing the growth rate of the QDs, a crucial factor for resolving the dilemma between the stability and tunability of the QDs. Additionally, this proposed strategy holds the potential to modulate the properties of various nanoparticles through chemical reactions at the interfaces.\",\"PeriodicalId\":33,\"journal\":{\"name\":\"Chemistry of Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.2000,\"publicationDate\":\"2024-09-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemistry of Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1021/acs.chemmater.4c00026\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemistry of Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acs.chemmater.4c00026","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Interface Nucleophilic Substitution Reaction-Driven Precise Growth of Ag2Te Quantum Dots
Surface ligands of quantum dots (QDs) play pivotal roles in determining their optical properties and stability during the growth process. The stability and continuous growth of nanocrystals are crucial to precisely tuning their properties. However, the dilemma surrounding the stability of nanocrystals and their continuous growth remains unsolved, posing a formidable challenge. Herein, we have proposed a strategy for precise tuning of Ag2Te QD growth driven by nucleophilic substitution reaction (SN2) between surface-bound thiol ligands and halogenated hydrocarbons (RX, X = Cl, Br, I), prompted by the generation of silver halide precipitate. As a result, Ag2Te QDs with emission wavelengths precisely and continuously tunable in the range of 1176–2023 nm have been successfully synthesized in one pot. As the reaction advances, the quantity of the more strongly coordinating RS– gradually diminishes, while that of the weaker coordinating dioctyl sulfide gradually increases. This dynamic process enables the growth of the QDs. The rate of the SN2 reaction can be adjusted by varying the species and concentration of RX, as well as the amount of Ag species, significantly influencing the growth rate of the QDs, a crucial factor for resolving the dilemma between the stability and tunability of the QDs. Additionally, this proposed strategy holds the potential to modulate the properties of various nanoparticles through chemical reactions at the interfaces.
期刊介绍:
The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.