Ran Li, Dr. Fei Yang, Liying Zhang, Mengzhen Li, Dr. Guo Wang, Prof. Weizhi Wang, Prof. Yanqing Xu, Prof. Wei Wei
{"title":"Manipulating Host-Guest Charge Transfer of a Water-Soluble Double-Cavity Cyclophane for NIR-II Photothermal Therapy","authors":"Ran Li, Dr. Fei Yang, Liying Zhang, Mengzhen Li, Dr. Guo Wang, Prof. Weizhi Wang, Prof. Yanqing Xu, Prof. Wei Wei","doi":"10.1002/ange.202301267","DOIUrl":null,"url":null,"abstract":"<p>Water-soluble small organic photothermal agents (PTAs) over NIR-II biowindow (1000–1350 nm) are highly desirable, but the rarity greatly limits their applications. Based on a water-soluble double-cavity cyclophane <b>GBox-4<sup>4+</sup></b>, we report a class of host–guest charge transfer (CT) complexes as structurally uniform PTAs for NIR-II photothermal therapy. As a result of its high electron-deficiency, <b>GBox-4<sup>4+</sup></b> can bind different electron-rich planar guests with a 1 : 2 host/guest stoichiometry to readily tune the CT absorption band that extends to the NIR-II region. When using a diaminofluorene guest substituted with an oligoethylene glycol chain, the host–guest system realized both good biocompatibility and enhanced photothermal conversion at 1064 nm, and was then exploited as a high-efficiency NIR-II PTA for cancer cell and bacterial ablation. This work broadens the potential applications of host–guest cyclophane systems and provides a new access to bio-friendly NIR-II photoabsorbers with well-defined structures.</p>","PeriodicalId":7803,"journal":{"name":"Angewandte Chemie","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Angewandte Chemie","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ange.202301267","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Water-soluble small organic photothermal agents (PTAs) over NIR-II biowindow (1000–1350 nm) are highly desirable, but the rarity greatly limits their applications. Based on a water-soluble double-cavity cyclophane GBox-44+, we report a class of host–guest charge transfer (CT) complexes as structurally uniform PTAs for NIR-II photothermal therapy. As a result of its high electron-deficiency, GBox-44+ can bind different electron-rich planar guests with a 1 : 2 host/guest stoichiometry to readily tune the CT absorption band that extends to the NIR-II region. When using a diaminofluorene guest substituted with an oligoethylene glycol chain, the host–guest system realized both good biocompatibility and enhanced photothermal conversion at 1064 nm, and was then exploited as a high-efficiency NIR-II PTA for cancer cell and bacterial ablation. This work broadens the potential applications of host–guest cyclophane systems and provides a new access to bio-friendly NIR-II photoabsorbers with well-defined structures.