期刊论文

Duan, CX;Nejad, A

英文

Journal of Physical Chemistry Letters

1948-7185

2023

14

35

7795-7801

10.1021/acs.jpclett.3c01860

C. Duan thanks the National Natural Science Foundation of China (Grant No. 11574107) for financial support and Dr. Xunchen Liu for the loan of one EC-QCL used in the experiment. A. Nejad gratefully acknowledges access to computing facilities of the Georg-August University of Göttingen and GRK2455 start-up funding through projects funded by the Deutsche Forschungsgemeinschaft [DFG, German Research Foundation], Grant Nos. 405832858 and 389479699/GRK2455, and would like to thank Prof. Dr. Martin Suhm for initiating this collaborative work. Furthermore, we would like to thank Prof. Dr. Martin Suhm for critical feedback on the manuscript and Dr. Peter Franke for instructive discussions on centrifugal distortion constants.

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Building on recent progress in the vibrational spectroscopy of the formic acid trimer, we present the first high-resolution measurements of the jet-cooled laser absorption spectrum of (HCOOH)3. The spectra of the lowest- and highest-frequency C-O stretching fundamentals are analyzed whereas the third band is not observed, complicated by monomer and dimer absorptions at 1219 cm-1 (8.2 μm). Vibration-rotation parameters are obtained for the band at 1172.31512(68) cm-1 whereas the C-O stretch at 1246.33(5) cm-1 exhibits a significantly larger bre...