Synergistic Photophysical Modulation via Molecular Engineering: Carbazole-Based Copolymers Enabling High-Efficiency Ultralong Room-Temperature Phosphorescence

Synergistic Photophysical Modulation via Molecular Engineering: Carbazole-Based Copolymers Enabling High-Efficiency Ultralong Room-Temperature Phosphorescence | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Synergistic Photophysical Modulation via Molecular Engineering: Carbazole-Based Copolymers Enabling High-Efficiency Ultralong Room-Temperature Phosphorescence Xiangkui Ren, Jian Chen, Haochen Guo, Lin Zhang, Wenqian Liu, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9197295/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract Room-temperature phosphorescence (RTP) polymers represent promising candidates for advanced optical materials and devices. However, it remains challenging to realize efficient RTP with a long lifetime through the multidimensional structural engineering of polymers. Herein, based on the synergistic photophysical mechanism of excited-state energy transfer, rigid microenvironment, and strong intermolecular hydrogen-bonding interactions, a novel amorphous carbazole-based copolymer with room-temperature long afterglow is constructed. Flexible alkyl-chain spacers act as conformation regulators to facilitate carbazole moieties rearrangement, while polar acrylamide comonomer units synergistically construct robust intra- and intermolecular hydrogen-bonding interactions that form a rigid microenvironment, effectively suppressing nonradiative decay, triplet exciton annihilation, and emission quenching to achieve ultralong RTP in the copolymers. In particular, the carbazole-based copolymer (1-400) exhibits long-lived phosphorescence emission with a lifetime of up to 1.45 s and a remarkable afterglow duration exceeding 20 s under ambient conditions. Meanwhile, the RTP emission color of the carbazole-based copolymer can be tuned from blue to bright yellow by incorporating commercial fluorescent dyes via the triplet-to-singlet Förster-resonance energy transfer strategy. As a proof-of-concept demonstration, the organic carbazole-based RTP materials exhibit great potential for information storage and encryption. This work achieves high-performance RTP through multidimensional polymer regulation, establishing new design principles for carbazole-based materials and boosting their applications in optoelectronics. Physical sciences/Materials science Physical sciences/Materials science/Materials for devices/Information storage Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupportingInformation2026.3.23.docx Synergistic Photophysical Modulation via Molecular Engineering: Carbazole-Based Copolymers Enabling High-Efficiency Ultralong Room-Temperature Phosphorescence Cite Share Download PDF Status: Under Review Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-9197295","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":611387938,"identity":"733f116d-aa47-4b91-abbb-5a44865274be","order_by":0,"name":"Xiangkui 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