论文标题
实验室旋转光谱和乙烯岩的天文搜索取代了萘
Laboratory rotational spectroscopy and astronomical search of ethynyl substituted naphthalene
论文作者
论文摘要
最近对蓝乙烯甲烯烃的星际检测引起了可能存在于类似的天文环境中的相关芳香族分子物种的兴趣。在这种情况下，在金牛座的分子云（TMC-1）中观察到萘的乙基烯衍生物，其中氰基甲乙烯与氰基二苯甲酸酯以及环戊二烯烯和苯二苯和苯的乙醇衍生物一起观察到。为了使萘的星际搜索搜索乙烯的乙基衍生物，需要在实验室中研究其纯粹的旋转光谱。我们是第一次使用在2-8 GHz频率区域运行的宽带傅立叶转换微波光谱仪首次观察到1和2-乙基萘物种的旋转光谱。准确的光谱参数来自对实验光谱的分析，从而可以对天文搜索进行可靠的预测。我们在TMC-1中对两种异构体的搜索为这些物种的丰富性提供了上限。
The recent interstellar detection of cyanonaphthalenes bring interest in related aromatic molecular species that could be present in similar astronomical environments. In this context, ethynyl derivatives of naphthalene are promising candidates to be observed in the Taurus Molecular Cloud (TMC-1), where cyanonaphthalenes together with cyano- and ethynyl- derivatives of cyclopentadiene and benzene have been detected. To enable the interstellar searches for ethynyl derivatives of naphthalene, their pure rotational spectra need to be investigated in the laboratory. We have observed for the first time the rotational spectra of 1- and 2-ethynylnaphthalene species using a broadband Fourier-transform microwave spectrometer operating in the 2-8 GHz frequency region. Accurate spectroscopic parameters are derived from the analysis of the experimental spectra, allowing for reliable predictions for astronomical searches. Our searches in TMC-1 for both isomers provide upper limits for the abundances of these species.
