A New Molecular Recognition Concept: Multiple Hydrogen Bonds and Their Optically Triggered Proton Transfer in Confined Metal–Organic Frameworks for Superior Sensing Element
| Autor: | Miao-Miao Zhang, Quan-Guo Zhai, Wen-Juan Ji, Hongtao Bian, Yong-Peng Li, Honglan Qi, Jiao Lei, Ke Wang, Pi-Tai Chou, Bing-Qiang Wang |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Proton Hydrogen bond Hydride 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Signal 0104 chemical sciences Molecular recognition Transducer Intramolecular force General Materials Science Metal-organic framework 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 13:22457-22465 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.1c03410 |
| Popis: | We report a new sensing mechanism based on an indium-dihydroxyterephthalic acid metal-organic framework (MOF, SNNU-153), in which the spatially fitted analyte-MOF hydrogen-bond (H-bond) formation provides selective recognition while the analyte-H-bond assisted excited-state intramolecular proton transfer (ESIPT) and the resulting ratiometric emission act as a superior signal transducer with ultrafast response. The synergy of ESIPT signal transduction and confined MOF pore enables the SNNU-153 sensor selectively sensing hydrazine even among nitrogen-containing hydride analogs such as NH3, NH2OH, and (Me)2NNH2. The key of H-bond and associated ESIPT was further counter evidenced by an indium-2,5-dimethoxyterephthalic acid MOF (SNNU-152), where the hydroxyl protons were removed by methylation, showing near inertness to N2H4. The new molecular recognition concept thus makes SNNU-153 a powerful N2H4 sensor, which should be far-reaching to other sensing elements. |
| Databáze: | OpenAIRE |
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