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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Cavity Ring Down Spectroscopy Measurements for High-Overtone Vibrational Bands of HC3N
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Cavity Ring Down Spectroscopy Measurements for High-Overtone Vibrational Bands of HC3N

机译：HC3N高泛音振动带的腔衰荡光谱测量

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摘要

Overtone (5v(1) and 6v(1)) and combination (4v(1) + v(3) and 4v(1) + v(2)) vibrational bands of gaseous HC3N, located in the visible range (14600-15800 and 17400-18600 cm(-1)), were investigated by cavity ring-down absorption spectroscopy. The 5v(1) + v(3) and 5v(1) + v(2) combinations as well as the 6v(1) + v(5) - v(5) hot overtone band have also been identified, on the basis of previous overtone assignments. Absolute integrated intensity values and the ensuing oscillator strengths have been measured here for the first time; f values are typically confined between 4 X 10(-12) and 7 x 10(-11). For the even weaker 5v(1) + v(2) combination band, the oscillator strength was estimated as 9 x 10(-13). The values concerning CH-stretch overtones (nv(1)) are similar to those found in the literature for HCN and C2H2, the molecules with sp-hybridized carbon atoms. Data presented here may prove useful for studying the photochemistry triggered with visible or near-IR radiation within the atmospheres of certain Solar System bodies, including Titan.
机译：气态HC3N的泛音（5v（1）和6v（1））和组合（4v（1）+ v（3）和4v（1）+ v（2））振动带，位于可见范围内（14600-15800和17400-18600 cm（-1）），通过腔衰荡吸收光谱法进行了研究。在此基础上，还确定了5v（1）+ v（3）和5v（1）+ v（2）组合以及6v（1）+ v（5）-v（5）热泛音带。以前的泛音分配。此处首次测量了绝对积分强度值和随之产生的振荡器强度。 f值通常限制在4 X 10（-12）和7 x 10（-11）之间。对于甚至更弱的5v（1）+ v（2）组合频带，振荡器强度估计为9 x 10（-13）。关于CH拉伸泛音（nv（1））的值与HCN和C2H2（具有sp杂化碳原子的分子）在文献中发现的值相似。此处提供的数据可能对研究某些太阳系物体（包括泰坦）的大气中可见或近红外辐射触发的光化学有用。

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