I. Physikalisches Institut, Universität zu Köln, Germany.
J Chem Phys. 2010 Jun 14;132(22):224306. doi: 10.1063/1.3431964.
The nu(5) antisymmetric stretching mode of the linear carbon cluster C(7) has been revisited using a sensitive high-resolution spectrometer, including an external-cavity quantum cascade laser covering the range of interest of 1894-1901 cm(-1). 50 transitions of the nu(5)-band have been recorded and analyzed together with 45 transitions of the nu(4)-band measured by Neubauer-Guenther et al. [J. Chem. Phys. 127, 014313 (2007)]. We determined the band centers, rotational and centrifugal constants very precisely. In addition, 29 hot band transitions have been measured and tentatively assigned to the nu(5)+nu(11)-nu(11) hot band. A global fit of the hot bands nu(5)+nu(11)-nu(11) and nu(4)+nu(11)-nu(11) is presented. Derived l-type doubling constants allow for an experimental estimation of the nu(11)-band center.
使用高灵敏度高分辨率光谱仪重新研究了线性碳簇 C(7)的 nu(5)反称伸缩模式，该光谱仪包括一个覆盖感兴趣范围 1894-1901 cm(-1)的外腔量子级联激光器。记录了 50 条 nu(5)-带的跃迁，并与 Neubauer-Guenther 等人测量的 45 条 nu(4)-带的跃迁一起进行了分析[J. Chem. Phys. 127, 014313 (2007)]。我们非常精确地确定了带中心、转动常数和离心常数。此外，还测量了 29 条热带跃迁，并初步将其分配给 nu(5)+nu(11)-nu(11)热带。给出了热带 nu(5)+nu(11)-nu(11)和 nu(4)+nu(11)-nu(11)的全局拟合。推导的 l 型双重常数允许对 nu(11)-带中心进行实验估计。
