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Generation of sodium halide endohedral metallofullerenes in the gas phase.
Rapid Communications in Mass Spectrometry ( IF 1.8 ) Pub Date : 2020-05-12 , DOI: 10.1002/rcm.8826
Xingting Fan 1 , Yiyun Wang 1 , Xianglei Kong 1, 2
Affiliation  

RATIONALE Recent theoretical calculations show that ionic bond encapsulated endohedral metallofullerenes (EMFs) have great potentials in the application of molecular electronic components. However, experimental study of these species is very limited, due to the difficulty in their generation. Thus, it is important to study the possibility and optimized conditions of these species generated in the gas phase. METHODS Mixtures of graphene and metal halides (MX), where M = Na, K; and X = Cl, Br, I, were used as the precursors for the experiments. Mass spectra were obtained in positive ion mode by laser irradiation of these mixtures of graphene and metal halides using a 7.0 T Fourier transform ion cyclotron resonance (FT ICR) mass spectrometer equipped with a 355 nm YAG laser. RESULTS EMF ions of NaCl@C+ 2n (2n= 120-244), NaBr@C+ 2n (2n= 110-240), and NaI@C+ 2n (2n= 116-198) were observed in the laser ablation mass spectra. However, the encapsulated could not be replaced by Li or K in these experiments, indicating that the effects of metal cation on the EMFs are larger than those of halide anions. CONCLUSIONS Ionic bond encapsulated EMF ions of NaX@C+ 2n (X= Cl, Br and I, 110≤2n≤244) were generated by laser ablation of the mixture of graphene and sodium halides, but no species containing lithium or potassium were observed. This work opens the possibilities of using laser ablation for the synthesis of large-sized salt encaged EMFs. Further study of the mechanism for these processes is important for the generation of the missing species.

中文翻译:

在气相中生成卤化钠内衬金属富勒烯。

理由最近的理论计算表明,离子键封装的内面金属富勒烯(EMF)在分子电子组件的应用中具有巨大的潜力。然而,由于这些物种的产生困难,对它们的实验研究非常有限。因此,重要的是研究在气相中产生的这些物质的可能性和优化条件。方法石墨烯和金属卤化物(MX)的混合物,其中M = Na,K; X = Cl,Br,I用作实验的前体。使用配备355 nm YAG激光器的7.0 T傅里叶变换离子回旋共振(FT ICR)质谱仪,通过对石墨烯和金属卤化物的这些混合物进行激光辐照,以阳离子模式获得质谱。结果NaCl @ C + 2n(2n = 120-244),NaBr @ C + 2n(2n = 110-240)的EMF离子 在激光烧蚀质谱中观察到NaCl + C 2n(2n = 116-198)。但是,在这些实验中不能用Li或K代替被包封物,这表明金属阳离子对EMF的影响大于卤化物阴离子的影响。结论通过激光烧蚀石墨烯和卤化钠的混合物产生了NaX @ C + 2n(X = Cl,Br和I,110≤2n≤244)的离子键包裹的EMF离子,但未观察到任何含锂或钾的物质。这项工作为使用激光烧蚀法合成大型盐包埋的电动势提供了可能性。进一步研究这些过程的机制对于丢失物种的产生很重要。表明金属阳离子对EMF的影响大于卤化物阴离子。结论通过激光烧蚀石墨烯和卤化钠的混合物产生了NaX @ C + 2n(X = Cl,Br和I,110≤2n≤244)的离子键包裹的EMF离子,但未观察到任何含锂或钾的物质。这项工作为使用激光烧蚀法合成大型盐包埋的电动势提供了可能性。进一步研究这些过程的机制对于丢失物种的产生很重要。表明金属阳离子对EMF的影响大于卤化物阴离子。结论通过激光烧蚀石墨烯和卤化钠的混合物产生了NaX @ C + 2n(X = Cl,Br和I,110≤2n≤244)的离子键包裹的EMF离子,但未观察到任何含锂或钾的物质。这项工作为使用激光烧蚀法合成大型盐包埋的电动势提供了可能性。进一步研究这些过程的机制对于丢失物种的产生很重要。但没有观察到含有锂或钾的物质。这项工作开辟了使用激光烧蚀法合成大型盐包埋的电动势的可能性。进一步研究这些过程的机制对于丢失物种的产生很重要。但没有观察到含有锂或钾的物质。这项工作为使用激光烧蚀法合成大型盐包埋的电动势提供了可能性。进一步研究这些过程的机制对于丢失物种的产生很重要。
更新日期:2020-05-12
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