Eigenstate resolved infrared and millimeter-wave–infrared double resonance spectroscopy of methylamine in the N–H stretch first overtone region
文献信息
The eigenstate resolved, near-infrared spectrum of methylamine, CH3NH2, has been measured at 5 MHz resolution in the region near 6615 cm-1 using a molecular-beam laser spectrometer with optothermal detection. Part of the spectrum of the NH 2ν1 (symmetric stretch first overtone) has been assigned by applying a millimeter-wave–infrared double resonance technique. The spectra are very fractionated by intramolecular vibrational energy redistribution with an observed density of states between 20 and 30 states per cm-1 which is about four times the density of vibrational states calculated in the harmonic approximation. The coupling between the bright states and the bath is found to be rather strong (0.1 cm-1), and the lifetime for the redistribution is determined to be 3 ps for the 2ν1 vibration.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.










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