Where is the Hidden Intramolecular H-bonding Vibrational Signal in the Proline Matrix IR Spectrum?

James Langford, Yuzhe Zhang, Zehua Chen, and Yang Yang. Where Is the Hidden Intramolecular H-Bonding Vibrational Signal in the Proline Matrix IR Spectrum?. Vol. 161, no. 13, J. Chem. Phys., 2024, p. 134302.