Deuterated Methanol

Raw FTIR transmission spectra of methanol isotopologues in astrophysical ice analogues. This dataset contains unprocessed spectrometer exports of pure methanol isotopologues, binary mixtures (methanol–deuterated methanol), and ternary mixtures (H₂O–methanol–deuterated methanol and CO–methanol–deuterated methanol). Measurements were performed at 10 K and after annealing to 120 K. Selected isotopologues include: CH₃OD, CH₂DOH, CHD₂OH, CD₃OH, and CD₃OD. Files are provided exactly as exported from the Bruker OPUS software. No baseline correction, smoothing, normalization, absorbance conversion, or atmospheric correction has been applied. Data include full spectrometer exports (interferograms, reference spectra, ratio spectra, and transmission spectra). Folder structure:Top-level folders are organized by ice composition and temperature.Subfolders contain data for different mixing ratios. Instrument and measurement parameters (Bruker Vertex 70v, OPUS 8.7.31):Measurement mode: FTIR transmissionMeasurement channel: Sample compartmentSource setting: MIRBeamsplitter setting: Wide Range MIR–FIRDetector setting: RT-DLaTGS Wide Range (internal position 1)Aperture setting: 8 mmATR pressure: 0High-pass filter: OpenLow-pass filter: 5 kHzVariable low-pass filter: 4000 cm⁻¹Optical filter setting: OpenScanner velocity: 5 kHzExternal synchronization: Off FT processing parameters (as exported by OPUS):Apodization function: Blackman–Harris (3-term)Phase correction mode: MertzPhase resolution: 8 cm⁻¹Stored phase mode: NoZero filling factor: 2Start frequency limit for file: 6000 cm⁻¹End frequency limit for file: 30 cm⁻¹Non-linearity correction: 0 Contact:Adam VyjidakMax-Planck-Institut für extraterrestrische [e-mail] License: CC-BY 4.0