二维Rh-C60聚合相的制备和表征
Synthesis and Characterization of Rhombohedral Two-dimensional C60 Polymer
利用高压合成装置在6 GPa、7000C的压力和温度条件下合成二维C60聚合相，并用X射线衍射（XRD）和高分辨核磁共振（NMR）对样品进行了表征。XRD结果表明，C60 分子在高温高压下发生了聚合反应，晶体结构由面心立方变为菱形结构，通过[2+2]加环反应在邻近分子间形成sp3杂化共价键。13C核磁共振魔角谱 （13C MAS NMR）在145和72 ppm处出现了两个共振峰，其中145 ppm处附近的峰展宽并有两个边带。145 ppm附近的峰的展宽与分裂主要由于C60分子上出现了不等价的sp2杂化碳和高温高压条件产生的结构无序，边带的形成说明了其结构的各向异性；位置为72 ppm处附近的峰证明了聚合物内C60分子之间出现了sp3杂化键。
rhombohedral two-dimensional (2D-Rh) C60 polymer has been successfully synthesized by cubic press methods under the conditions of 6 GPa and 700oC. X-ray diffraction (XRD) and nuclear magenatic resonance (NMR) were performed to characterize the samples. XRD spectrum indicates that the C60 polymer is rhombohedral, and sp3 bonds have formed between adjacent fullerene molecules via [2+2] cycloaddition reaction. 13C MAS NMR spectrum shows one broad peak at 145 ppm, which has two sidebands, and one small peak at about 72 ppm. The big widths of the peak at 145 ppm could be related to the presence of inequivalent sp2 sites and structure disorder. The sidebands of the peak at 145ppm show the large structure anisotropy of the corresponding carbons. The peak at 72 ppm indicates the presence sp3 bond of adjacent C60 molecules.
顾民、王素芹
化学晶体学
60聚合物高温高压XRDNMR
60polymerhigh temperature and high pressureXRDNMR
顾民,王素芹.二维Rh-C60聚合相的制备和表征[EB/OL].(2007-12-28)[2025-08-04].http://www.paper.edu.cn/releasepaper/content/200712-829.点此复制
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