We report the synthesis and characterization of a fan-shaped chiral nanographene 1,which is composed of 6 hexabenzocoronene subunits with 216 conjugated carbon atoms.In the dehydrocyclization reaction,38 C–C bonds ar...We report the synthesis and characterization of a fan-shaped chiral nanographene 1,which is composed of 6 hexabenzocoronene subunits with 216 conjugated carbon atoms.In the dehydrocyclization reaction,38 C–C bonds are formed simultaneously.1 exhibits strong panchromatic absorption from the ultraviolet to the near-infrared,with an absorption coefficient of 209,000 L mol^(-1)cm^(-1)at 564 nm.Optically pure samples,obtained via chiral HPLC,show distinct ECD signals(|Δε|=704 L mol^(-1)cm^(-1)at 405 nm).Upon excitation,1 emits near-infrared fluorescence at 820 nm with a quantum yield of 5.5%.These photophysical properties of 1 were analyzed with the assistance of DFT calculations.展开更多
We describe a janusarene derivative PyJ,which forms micrometer-scale one-dimensional metallo-supramolecular polymer through coordination driven self-assembly.PyJ is a well-preorganized dodecatopic pyridyl ligand built...We describe a janusarene derivative PyJ,which forms micrometer-scale one-dimensional metallo-supramolecular polymer through coordination driven self-assembly.PyJ is a well-preorganized dodecatopic pyridyl ligand built on a hexaphenylbenzene platform.The two-face structural feature of PyJ allows for a delicate control over multiple Py-Ag^(+)-Py coordination interactions,leading to assembled structure of PyJ-Ag^(+),which was characterized by dynamic light scattering,atomic force microscopy,and transmission electron microscopy.展开更多
基金supported by the National Natural Science Foundation of China(Nos.21871298,91956118)。
文摘We report the synthesis and characterization of a fan-shaped chiral nanographene 1,which is composed of 6 hexabenzocoronene subunits with 216 conjugated carbon atoms.In the dehydrocyclization reaction,38 C–C bonds are formed simultaneously.1 exhibits strong panchromatic absorption from the ultraviolet to the near-infrared,with an absorption coefficient of 209,000 L mol^(-1)cm^(-1)at 564 nm.Optically pure samples,obtained via chiral HPLC,show distinct ECD signals(|Δε|=704 L mol^(-1)cm^(-1)at 405 nm).Upon excitation,1 emits near-infrared fluorescence at 820 nm with a quantum yield of 5.5%.These photophysical properties of 1 were analyzed with the assistance of DFT calculations.
基金supported by the National Natural Science Foundation of China(Nos.21871298,91956118)the Sun Yat-sen University。
文摘We describe a janusarene derivative PyJ,which forms micrometer-scale one-dimensional metallo-supramolecular polymer through coordination driven self-assembly.PyJ is a well-preorganized dodecatopic pyridyl ligand built on a hexaphenylbenzene platform.The two-face structural feature of PyJ allows for a delicate control over multiple Py-Ag^(+)-Py coordination interactions,leading to assembled structure of PyJ-Ag^(+),which was characterized by dynamic light scattering,atomic force microscopy,and transmission electron microscopy.
