Svea M. Stepping, Nikita Vashistha, Sana Ullah, Poting Liu, Montaha Anjass and Benjamin Dietzek-Ivanšić
{"title":"光敏剂[Ru(bpy)3]2+的还原淬灭揭示了用于光驱动氧化还原催化的 PAN 聚合物纳米纤维中位点的不均匀分布†。","authors":"Svea M. Stepping, Nikita Vashistha, Sana Ullah, Poting Liu, Montaha Anjass and Benjamin Dietzek-Ivanšić","doi":"10.1039/D4RA05672H","DOIUrl":null,"url":null,"abstract":"<p >Integration of molecular photocatalysts into redox-inert polymers constitutes a path towards photocatalytically active, lightweight materials. In particular, electrospun polymer fibers hold potential due to their favorable surface-to-volume ratio and their straightforward fabrication. This study focuses on the polyacrylonitrile (PAN) fibers, into which the prototype photosensitizer (PS) ruthenium tris(bipyridine) [Ru(bpy)<small><sub>3</sub></small>]<small><sup>2+</sup></small>, has been embedded by electrospinning. Studying the interaction between the optically excited [Ru(bpy)<small><sub>3</sub></small>]<small><sup>2+</sup></small> with a non-redox inert solvent within the nanofibers, we resolve a distribution of microenvironments, which differ by the extent to which the photosensitizer is exposed to the solvent. This results in a non-exponential decay of the complex's emission and pronounced differences in the transient absorption signals.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":null,"pages":null},"PeriodicalIF":3.9000,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra05672h?page=search","citationCount":"0","resultStr":"{\"title\":\"Reductive quenching of photosensitizer [Ru(bpy)3]2+ reveals the inhomogeneous distribution of sites in PAN polymer nanofibers for light-driven redox catalysis†\",\"authors\":\"Svea M. Stepping, Nikita Vashistha, Sana Ullah, Poting Liu, Montaha Anjass and Benjamin Dietzek-Ivanšić\",\"doi\":\"10.1039/D4RA05672H\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Integration of molecular photocatalysts into redox-inert polymers constitutes a path towards photocatalytically active, lightweight materials. In particular, electrospun polymer fibers hold potential due to their favorable surface-to-volume ratio and their straightforward fabrication. This study focuses on the polyacrylonitrile (PAN) fibers, into which the prototype photosensitizer (PS) ruthenium tris(bipyridine) [Ru(bpy)<small><sub>3</sub></small>]<small><sup>2+</sup></small>, has been embedded by electrospinning. Studying the interaction between the optically excited [Ru(bpy)<small><sub>3</sub></small>]<small><sup>2+</sup></small> with a non-redox inert solvent within the nanofibers, we resolve a distribution of microenvironments, which differ by the extent to which the photosensitizer is exposed to the solvent. This results in a non-exponential decay of the complex's emission and pronounced differences in the transient absorption signals.</p>\",\"PeriodicalId\":102,\"journal\":{\"name\":\"RSC Advances\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.9000,\"publicationDate\":\"2024-10-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra05672h?page=search\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"RSC Advances\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2024/ra/d4ra05672h\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"RSC Advances","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/ra/d4ra05672h","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Reductive quenching of photosensitizer [Ru(bpy)3]2+ reveals the inhomogeneous distribution of sites in PAN polymer nanofibers for light-driven redox catalysis†
Integration of molecular photocatalysts into redox-inert polymers constitutes a path towards photocatalytically active, lightweight materials. In particular, electrospun polymer fibers hold potential due to their favorable surface-to-volume ratio and their straightforward fabrication. This study focuses on the polyacrylonitrile (PAN) fibers, into which the prototype photosensitizer (PS) ruthenium tris(bipyridine) [Ru(bpy)3]2+, has been embedded by electrospinning. Studying the interaction between the optically excited [Ru(bpy)3]2+ with a non-redox inert solvent within the nanofibers, we resolve a distribution of microenvironments, which differ by the extent to which the photosensitizer is exposed to the solvent. This results in a non-exponential decay of the complex's emission and pronounced differences in the transient absorption signals.
期刊介绍:
An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.