Modulating Triplet Excited States of Organic Semiconductors via Tuning Molecular Conformation for Dual-ratiometric Thermometers |
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| Authors: | Hao Chen Yishuo Sun Meihui Liu Fuyou Li Qian Peng Hui Huang |
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| Institution: | 1. College of Materials Science and Opto-Electronic Technology & Center of Materials Science and Optoelectronics Engineering & CAS Center for Excellence in Topological Quantum Computation & CAS Key Laboratory of Vacuum Physic, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China;2. Department of Chemistry & State Key Laboratory of Molecular Engineering of Polymers & Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, 2005 Songhu Road, Shanghai, 200438 P. R. China;3. School of Chemical Sciences, University of Chinese Academy of Sciences, 100049 Beijing, P. R. China |
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| Abstract: | The dual-ratiometric thermometry is one of highly accurate methods for microscopic thermal measurement in biological systems. Herein, a series of chromone derivatives with noncovalently intramolecular interactions (NIIs) were designed and synthesized for ratiometric thermometers. The triplet states of these organic compounds were systematically tuned upon regulating the conformation with NIIs to yield efficient room temperature phosphorescence and large wavelength difference between fluorescence and phosphorescence simultaneously. As a result, an unprecedent organic 3D dual-ratiometric thermometer was established based on the intensity ratio and lifetime ratio of fluorescence/phosphorescence vs temperature, which was used for in vitro and in vivo bio-thermometry with high accuracy. This work provides a novel method to achieve organic dual ratiometric thermometers via tuning the triplet excited states. |
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| Keywords: | Noncovalently Intramolecular Interactions Organic Room Temperature Phosphorescence Ratiometric Thermometry Triplet State |
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