Mid-infrared resonant reaction in confined space driven by vibrational excitation

作者：Xin Huang, Fengchao Cui, Jiangtao Jia, Lin Lin, Feifan Guo, Bo Song, Yang Gao, Lei Jiang, Guangshan Zhu · 发表于：ChemRxiv · 年份：2026 · DOI：10.26434/chemrxiv.15000307/v1 · 被引用次数：2 · 研究领域：Quantum chaos and dynamical systems、Cold Atom Physics and Bose-Einstein Condensates、Laser-Matter Interactions and Applications

Photochemical reactions and photosynthesis induced by ultraviolet or visible light excitation have been extensively investigated 1-3 .However, driving photochemical transformations via mid-infrared vibrational excitation of specific chemical bonds remains a significant challenge.Herein, we demonstrate that a ~3 m mid-infrared laser enables the selective excitation of the C-H stretching vibration (C-H = 3249 cm -1 , ads 3 m) of acetylene (C2H2) molecules confined within the channels of a metal-organic framework (MOF), resulting in the formation of hydrogen gas and single-walled 4 carbon nanotubes (CNTs).This photochemical process, rather than a thermochemical reaction, is confirmed to be a photochemical reaction, as evidenced by its wavelength selectivity and polarization dependence.Meanwhile, the light intensity dependence of the process indicates that it involves a multiphoton excitation, which is achieved via the prolonged lifetime of excited states due to confinement effects.This study marks