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Graphene quantum‐dot‐like structures of highly enriched N‐based dual‐color single‐functional polymer carbon nanosheets (GLNPCNs) with an average diameter as large as 170 nm (ca. five layers) are prepared through a facile hydrothermal method. Intermolecular C5H5N5⋅⋅⋅C5H5N5 and/or C2H5OH chemical polymerization interactions in the liquid state of the peripheral crown‐ether‐like “hole”‐decorated compound...
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