Qualitative observation of reversible phase change in astrochemical ethanethiol ices using infrared spectroscopy.
Qualitative observation of reversible phase change in astrochemical ethanethiol ices using infrared spectroscopy.
复制标题
DOI：
10.1016/j.saa.2017.01.023
复制
发表时间：
2016-11
期刊：
影响因子：
--
通讯作者：
S. Pavithraa;R. R. J. Methikkalam-R.;P. Gorai;Jen-Iu Lo;Ankan Das;B. N. Sekhar;T. Pradeep;B. Cheng;N. J. Mason;B. Sivaraman
中科院分区：
文献类型：
--
作者：
S. Pavithraa;R. R. J. Methikkalam-R.;P. Gorai;Jen-Iu Lo;Ankan Das;B. N. Sekhar;T. Pradeep;B. Cheng;N. J. Mason;B. Sivaraman
在这里，我们报告的第一个证据，在天体化学条件下制备的乙烷冰可逆相变。红外（IR）光谱用于监测冰的形态，使用S单键H伸缩振动，硫醇分子的特征振动。沉积的样品能够在10 K和130 K之间的温度循环下反复在非晶相和结晶相之间切换，随后在每次相变中损失分子。这种影响取决于冰的原始厚度。定量分析的进一步工作将在适当的时候进行，而这里我们报告的是获得的第一批结果。
Here we report the first evidence for a reversible phase change in an ethanethiol ice prepared under astrochemical conditions. InfraRed (IR) spectroscopy was used to monitor the morphology of the ice using the Ssingle bondH stretching vibration, a characteristic vibration of thiol molecules. The deposited sample was able to switch between amorphous and crystalline phases repeatedly under temperature cycles between 10 K and 130 K with subsequent loss of molecules in every phase change. Such an effect is dependent upon the original thickness of the ice. Further work on quantitative analysis is to be carried out in due course whereas here we are reporting the first results obtained.