富勒烯是21微米特征的原因吗？
Are fulleranes responsible for the 21 micron feature?
摘要：
最近在太空中探测到的C $_{60}$、C $_{70}$和C $_{60}^+$引发了对星周环境中富勒烯衍生物的广泛研究。原行星状星云（PPNe）是富勒烯的重要来源，在其红外光谱中有许多未识别的谱带，其中一个小样本在$\sim21$ \，$μ$ m处有一个神秘的谱带。富勒烯的氢化可以产生发射新的红外波段的富勒烷。本文根据富勒烷的理论振动光谱，研究了富勒烷（C $_{60}$ H $_m$）作为21，$μ$ m特征的载体的可能性.提出了支持和反对富勒烷假说的证据。我们对C $_{60}$ H $_m$的氢覆盖率进行了初步猜测，这可能有助于21\，$μ$ m特征。
英文摘要：
Recent detections of C$_{60}$, C$_{70}$, and C$_{60}^+$ in space induced extensive studies of fullerene derivatives in circumstellar environments. As the promising fullerene sources, protoplanetary nebulae (PPNe) show a number of unidentified bands in their infrared spectra, among which a small sample exhibits an enigmatic feature at $\sim21$\,$μ$m. Hydrogenation of fullerenes can produce fulleranes emitting new infrared bands. In this paper, we investigate the possibility of fulleranes (C$_{60}$H$_m$) as the carrier of the 21\,$μ$m feature in terms of theoretical vibrational spectra of fulleranes. The evidences favoring and disfavoring the fullerane hypothesis are presented. We made an initial guess for the hydrogen coverage of C$_{60}$H$_m$ that may contribute to the 21\,$μ$m feature.
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