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• W4285087695 endingPage "13241" @default.
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• W4285087695 abstract "Aryl diazonium reactions are widely used to covalently modify graphitic electrodes and low-dimensional carbon materials, including the recent creation of organic color centers (OCCs) on single-wall carbon nanotube semiconductors. However, due to the experimental difficulties in resolving small functional groups over extensive carbon lattices, a basic question until now remains unanswered: what group, if any, is pairing with the aryl sp3 defect when breaking a C═C bond on the sp2 carbon lattice? Here, we show that water plays an unexpected role in completing the diazonium reaction with carbon nanotubes involving chlorosulfonic acid, acting as a nucleophilic agent that contributes −OH as the pairing group. By simply replacing water with other nucleophilic solvents, we find it is possible to create OCCs that feature an entirely new series of pairing groups, including −OCH3, −OC2H5, −OC3H7, -i-OC3H7, and −NH2, which allows us to systematically tailor the defect pairs and the optical properties of the resulting color centers. Enabled by these pairing groups, we further achieved the synthesis of OCCs with sterically bulky pairs that exhibit high purity defect photoluminescence effectively covering both the second near-infrared window and the telecom wavelengths. Our studies further suggest that these diazonium reactions proceed through the formation of carbocations in chlorosulfonic acid, rather than a radical mechanism that typically occurs in aqueous solutions. These findings uncover the unknown half of the sp3 defect pairs and provide a synthetic approach to control these defect color centers for quantum information, imaging, and sensing." @default.
• W4285087695 created "2022-07-14" @default.
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• W4285087695 date "2022-07-13" @default.
• W4285087695 modified "2023-10-14" @default.
• W4285087695 title "Quantum Defects: What Pairs with the Aryl Group When Bonding to the sp² Carbon Lattice of Single-Wall Carbon Nanotubes?" @default.
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• W4285087695 doi "https://doi.org/10.1021/jacs.2c03846" @default.
• W4285087695 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35830302" @default.
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