Guest-Responsive Reversible Electron Transfer in a Crystalline Porous Framework Supported by a Dynamic Building Node |
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Authors: | Dr. Nivedita Sikdar Dr. Arpan Hazra Dr. Debabrata Samanta Dr. Ritesh Haldar Prof. Dr. Tapas Kumar Maji |
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Affiliation: | 1. Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064 India;2. New Chemistry Unit, School of Advanced Materials (SAMat), Bangalore, 560064 India |
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Abstract: | We demonstrate a redox-active, crystalline donor–acceptor (D-A) assembly in which the electron transfer (ET) process can be reversibly switched. This ET process, induced by a guest-responsive structural transformation at room temperature, is realized in a porous, metal–organic framework (MOF), having anthracene (D)–naphthalenediimide (A) as struts. A control MOF structure obtained by a solvent-assisted linker exchange (SALE) method, replacing an acceptor strut with a neutral one, supported the switchable electronic states in the D-A MOF. Combined investigations with X-ray diffraction, spectroscopy, and theoretical analyses revealed the dynamic metal paddle-wheel node as a critical unit for controlling structural flexibility and the corresponding unprecedented ET process. |
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Keywords: | dynamic nodes electron transfer guest responsiveness metal–organic frameworks redox-active species |
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