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Fig. 2 2D-IR spectroscopy on liquid ZnPa under dry conditions.
2D-IR spectroscopy on liquid ZnPa under dry conditions. (A) Linear IR spectrum in the carboxylate region of liquid ZnPa in the chain structure. (B) Corresponding 2D-IR spectrum with parallel polarization of pump and probe pulses (delay, 1 ps). Blue and red colors indicate negative and positive values of Δα, respectively, and contour intervals are at 1 mOD. (C) Polarization difference spectrum generated by subtracting the parallel spectrum from the perpendicular after scaling to the maximum of the diagonal signal. (D) Cross section of the 2D spectrum taken at a pump frequency of 1534 cm−1 [dashed line in (B)], showing the diagonal peak at 1545 cm−1 and cross peaks at 1565 and 1630 cm−1. Joen. J. Hermans et al. Sci Adv 2019;5:eaaw3592 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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