Unveiling the Transformation from Aggregation‐Caused Quenching to Encapsulation‐Induced Emission Enhancement for Improving the Photoluminescence Properties and Detection Performance of Conjugated Polymer Material in Multiple States

• DOI: 10.1002/adom.202202851
• Publication Date: 2023-04-19T22:30:02Z
• Authors: Sameer Hussain; Xi Chen; Yingying Gao; Huijia Song; Xuemeng Tian; Yulian He; Ansar Abbas; Mohammad Adil Afroz; Yi Hao; Ruixia Gao
• Keywords: Quantum yield

Abstract High hydrophobicity of π ‐extended conjugated polymers (CPs) adversely affects their photoluminescence quantum yield (PLQY) in water and hydrogel/solid state via an unsolicited aggregation‐caused quenching (ACQ) process which ultimately hampers sensing imaging performance. Herein, efficient strategy is presented to suppress transform such ACQ into encapsulation‐induced emission enhancement (EIEE) effect through facile preparation CP/Pluronic F‐127 fluorescent hybrid micelles hydrogel. As a proof‐of‐concept, successful encapsulation polyfluorene derivative PF‐DBT‐Im not only displays improved PLQY (≈200% increment) water/hydrogel but also delivers unique augmented responses toward the emerging pollutants tetracyclines taken as model analyte, validating superiority EIEE‐active micellar systems over suffering aggregates. The established method provides solution circumvent problem existing low dispersible CPs endorses enhanced, simplified system for visual on‐site detection analytes with likely futuristic applications biomedicine solid‐state optoelectronics.