Yue Zhang, Guiyuan Wu, Hui Liu, Rui Tian, Yan Li, Danbo Wang, Renzeng Chen, Jinyu Zhao, Shipeng Liu, Zhibo Li and Yingjie Zhao
{"title":"基于供体-受体的二维共价有机框架用于近红外光热转换†","authors":"Yue Zhang, Guiyuan Wu, Hui Liu, Rui Tian, Yan Li, Danbo Wang, Renzeng Chen, Jinyu Zhao, Shipeng Liu, Zhibo Li and Yingjie Zhao","doi":"10.1039/D1QM00462J","DOIUrl":null,"url":null,"abstract":"<p >Two 2D COFs containing both naphthalene diimides (NDIs) as an electron acceptor (A) and triphenylamine (<strong>PT-N-COF</strong>) or triphenylbenzene (<strong>PT-B-COF</strong>) as electron donors (D) were prepared successfully. The in-plane donor and acceptor units were connected through imine bonds with precise spatial distribution. The charge-transfer (CT) process induced from the D–A interactions in the 2D plane results in distinct near-infrared absorption properties. The unique structure modification in the skeleton of the COFs led to a great difference in photophysical properties and photothermal conversion properties. Compared to <strong>PT-B-COF</strong>, <strong>PT-N-COF</strong> containing triphenylamine as a donor displayed much stronger D–A interactions and CT effects, and thus exhibited obvious red-shift absorption in the NIR region. The photothermal conversion efficiency reached 66.4% in sharp contrast to 31.2% for <strong>PT-B-COF</strong>. EPR spectra verified the presence of unpaired electrons, which is consistent with the CT interaction in the ground state. The DFT molecular orbital simulation further revealed the mechanism of the photophysical properties and the CT process.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 17","pages":" 6575-6581"},"PeriodicalIF":6.0000,"publicationDate":"2021-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1039/D1QM00462J","citationCount":"3","resultStr":"{\"title\":\"Donor–acceptor based two-dimensional covalent organic frameworks for near-infrared photothermal conversion†\",\"authors\":\"Yue Zhang, Guiyuan Wu, Hui Liu, Rui Tian, Yan Li, Danbo Wang, Renzeng Chen, Jinyu Zhao, Shipeng Liu, Zhibo Li and Yingjie Zhao\",\"doi\":\"10.1039/D1QM00462J\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Two 2D COFs containing both naphthalene diimides (NDIs) as an electron acceptor (A) and triphenylamine (<strong>PT-N-COF</strong>) or triphenylbenzene (<strong>PT-B-COF</strong>) as electron donors (D) were prepared successfully. The in-plane donor and acceptor units were connected through imine bonds with precise spatial distribution. The charge-transfer (CT) process induced from the D–A interactions in the 2D plane results in distinct near-infrared absorption properties. The unique structure modification in the skeleton of the COFs led to a great difference in photophysical properties and photothermal conversion properties. Compared to <strong>PT-B-COF</strong>, <strong>PT-N-COF</strong> containing triphenylamine as a donor displayed much stronger D–A interactions and CT effects, and thus exhibited obvious red-shift absorption in the NIR region. The photothermal conversion efficiency reached 66.4% in sharp contrast to 31.2% for <strong>PT-B-COF</strong>. EPR spectra verified the presence of unpaired electrons, which is consistent with the CT interaction in the ground state. The DFT molecular orbital simulation further revealed the mechanism of the photophysical properties and the CT process.</p>\",\"PeriodicalId\":86,\"journal\":{\"name\":\"Materials Chemistry Frontiers\",\"volume\":\" 17\",\"pages\":\" 6575-6581\"},\"PeriodicalIF\":6.0000,\"publicationDate\":\"2021-06-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1039/D1QM00462J\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Chemistry Frontiers\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2021/qm/d1qm00462j\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Chemistry Frontiers","FirstCategoryId":"88","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2021/qm/d1qm00462j","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Donor–acceptor based two-dimensional covalent organic frameworks for near-infrared photothermal conversion†
Two 2D COFs containing both naphthalene diimides (NDIs) as an electron acceptor (A) and triphenylamine (PT-N-COF) or triphenylbenzene (PT-B-COF) as electron donors (D) were prepared successfully. The in-plane donor and acceptor units were connected through imine bonds with precise spatial distribution. The charge-transfer (CT) process induced from the D–A interactions in the 2D plane results in distinct near-infrared absorption properties. The unique structure modification in the skeleton of the COFs led to a great difference in photophysical properties and photothermal conversion properties. Compared to PT-B-COF, PT-N-COF containing triphenylamine as a donor displayed much stronger D–A interactions and CT effects, and thus exhibited obvious red-shift absorption in the NIR region. The photothermal conversion efficiency reached 66.4% in sharp contrast to 31.2% for PT-B-COF. EPR spectra verified the presence of unpaired electrons, which is consistent with the CT interaction in the ground state. The DFT molecular orbital simulation further revealed the mechanism of the photophysical properties and the CT process.
期刊介绍:
Materials Chemistry Frontiers focuses on the synthesis and chemistry of exciting new materials, and the development of improved fabrication techniques. Characterisation and fundamental studies that are of broad appeal are also welcome.
This is the ideal home for studies of a significant nature that further the development of organic, inorganic, composite and nano-materials.