期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 140, 期 31, 页码 10054-10059出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b06842
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资金
- ERATO program from JST [JPMJER1302]
- Funding Program for KAKENHI from MEXT [16K05771]
- Noguchi Institute
- World Premier International Research Center Initiative (WPI), Japan
- [17H05149]
The synthesis and X-ray crystal structure of the first member of the carbon nanobelt family is reported. [12] Carbon nanobelt ([12]CNB) was originally obtained from a nickel-mediated reductive coupling reaction of a dodecabrominated macrocyclic precursor, albeit only in 1% yield. The present article reports on the development of this synthetic strategy and its extension to the preparation of the [16] and [24] CNB analogues. In particular, our extensive investigations on the final belt-forming, nickel-mediated reaction led to the development of a new ligand system that provides [12]CNB in up to 7% yield, contributing to the commercialization of [12]CNB. The belt structures of [12], [16], and [24]CNB were characterized by NMR, UV-vis, and Raman spectroscopy as well as mass spectrometry and X-ray crystallography. The fluorescence of the CNBs in solution displayed a remarkable dependence on the ring size, ranging from a broad red emission ([12]CNB) to a narrow-band blue emission ([24]CNB), while both features are observed for [16]CNB.
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