Open Access
Table B.2
Peak position and FWHM of methyl cyanide CN stretching mode (2252.2 cm−1/ 4.440 µm) in pure and mixed ices at temperatures ranging from 15 - 150 K.
| T | Matrix | 1:5 | 1:10 | 1:20 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Peak | FWHM | Peak | FWHM | Peak | FWHM | Peak | FWHM | Peak | FWHM | Peak | FWHM | ||
| (cm-1) | (cm-1) | (µm) | (µm) | (cm-1) | (cm-1) | (µm) | (µm) | (cm-1) | (cm-1) | (µm) | (µm) | ||
| 15 | Pure ice | 2252.2 | 8.0 | 4.440 | 0.016 | - | - | - | - | - | - | - | - |
| H2O | 2265.0 | 13.2 | 4.415 | 0.026 | 2265.5 | 13.2 | 4.414 | 0.026 | 2266.4 | 14.4 | 4.412 | 0.028 | |
| CO | 2254.4 | 4.6 | 4.436 | 0.009 | 2253.9 | 4.8 | 4.437 | 0.009 | - | - | - | - | |
| CO2 | 2255.8 | 9.4 | 4.433 | 0.018 | 2256.8 | 11.7 | 4.431 | 0.023 | - | - | - | - | |
| CH4 | 2254.4 | 5.4 | 4.436 | 0.011 | 2254.9 | 5.2 | 4.435 | 0.010 | 2255.8 | 4.8 | 4.433 | 0.009 | |
| NH3 | 2252.4 | 8.3 | 4.440 | 0.016 | 2252.0 | 8.3 | 4.441 | 0.016 | 2252.4 | 8.8 | 4.440 | 0.017 | |
| H2O:CO2 | - | - | - | - | 2263.1 | 15.0 | 4.419 | 0.029 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 2264.0 | 13.6 | 4.417 | 0.026 | |
| 30 | Pure ice | 2252.2 | 7.8 | 4.440 | 0.015 | - | - | - | - | - | - | - | - |
| H2O | 2265.0 | 13.0 | 4.415 | 0.025 | 2265.9 | 13.1 | 4.413 | 0.025 | 2265.9 | 14.5 | 4.413 | 0.028 | |
| CO | 2253.9 | 4.6 | 4.437 | 0.009 | 2253.9 | 4.8 | 4.437 | 0.009 | - | - | - | - | |
| CO2 | 2255.8 | 9.2 | 4.433 | 0.018 | 2256.8 | 11.1 | 4.431 | 0.022 | - | - | - | - | |
| CH4 | 2254.4 | 5.2 | 4.436 | 0.010 | 2254.4 | 4.8 | 4.436 | 0.009 | 2254.9 | 4.8 | 4.435 | 0.009 | |
| NH3 | 2252.4 | 8.3 | 4.440 | 0.016 | 2252.0 | 8.2 | 4.441 | 0.016 | 2252.0 | 8.7 | 4.441 | 0.017 | |
| H2O:CO2 | - | - | - | - | 2263.1 | 14.9 | 4.419 | 0.029 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 2264.0 | 13.8 | 4.417 | 0.027 | |
| 50 | Pure ice | 2252.0 | 7.5 | 4.441 | 0.015 | - | - | - | - | - | - | - | - |
| H2O | 2265.5 | 12.4 | 4.414 | 0.024 | 2266.4 | 12.4 | 4.412 | 0.024 | 2265.9 | 13.7 | 4.413 | 0.027 | |
| CO2 | 2255.8 | 8.7 | 4.433 | 0.017 | 2256.8 | 11.3 | 4.431 | 0.022 | - | - | - | - | |
| CH4 | 2252.9 | 6.8 | 4.439 | 0.013 | 2252.4 | 6.8 | 4.440 | 0.013 | 2252.9 | 7.1 | 4.439 | 0.014 | |
| NH3 | 2252.4 | 8.0 | 4.440 | 0.016 | 2252.0 | 8.0 | 4.441 | 0.016 | 2252.0 | 8.4 | 4.441 | 0.017 | |
| H2O:CO2 | - | - | - | - | 2263.1 | 14.5 | 4.419 | 0.028 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 2264.0 | 13.2 | 4.417 | 0.026 | |
| 80 | Pure ice | 2252.0 | 7.1 | 4.441 | 0.014 | - | - | - | - | - | - | - | - |
| H2O | 2265.9 | 11.5 | 4.413 | 0.022 | 2266.4 | 11.7 | 4.412 | 0.023 | 2266.9 | 12.3 | 4.411 | 0.024 | |
| CO2 | 2255.3 | 8.0 | 4.434 | 0.016 | 2251.0 | 3.3 | 4.442 | 0.006 | - | - | - | - | |
| NH3 | 2252.4 | 7.5 | 4.440 | 0.015 | 2252.4 | 7.5 | 4.440 | 0.015 | 2252.4 | 7.9 | 4.440 | 0.016 | |
| H2O:CO2 | - | - | - | - | 2263.1 | 14.5 | 4.419 | 0.028 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 2266.4 | 12.5 | 4.412 | 0.024 | |
| 100 | Pure ice | 2251.0 | 2.7 | 4.4425 | 0.0053 | - | - | - | - | - | - | - | - |
| H2O | 2265.5 | 11.1 | 4.414 | 0.022 | 2266.4 | 11.1 | 4.412 | 0.022 | 2267.4 | 12.0 | 4.410 | 0.023 | |
| CO2 | 2251.0 | 5.7 | 4.442 | 0.011 | 2251.0 | 3.2 | 4.442 | 0.006 | - | - | - | - | |
| NH3 | 2251.5 | 6.3 | 4.441 | 0.012 | 2251.0 | 2.1 | 4.442 | 0.004 | - | - | - | - | |
| H2O:CO2 | - | - | - | - | 2265.0 | 12.4 | 4.415 | 0.024 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 2266.4 | 12.2 | 4.412 | 0.024 | |
| 120 | Pure ice | 2251.0 | 1.3 | 4.442 | 0.003 | - | - | - | - | - | - | - | - |
| H2O | 2265.5 | 11.1 | 4.414 | 0.022 | 2266.4 | 11.2 | 4.412 | 0.022 | 2266.4 | 11.0 | 4.412 | 0.021 | |
| NH3 | - | - | - | - | - | - | 2252.4 | 8.4 | 4.440 | 0.017 | |||
| H2O:CO2 | - | - | - | - | 2265.0 | 12.3 | 4.415 | 0.024 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 2266.4 | 12.5 | 4.412 | 0.024 | |
| 140 | Pure ice | 2250.8 | 1.3 | 4.443 | 0.003 | - | - | - | - | - | - | - | - |
| H2O | 2251.0 | 2.0 | 4.442 | 0.004 | 2251.0 | 2.0 | 4.442 | 0.004 | 2251.0 | 2.0 | 4.442 | 0.004 | |
| NH3 | 2251.0 | 2.1 | 4.442 | 0.004 | - | - | - | - | - | - | - | ||
| H2O:CO2 | - | - | - | - | 2251.0 | 2.1 | 4.442 | 0.004 | - | - | - | - | |
| 4 comp | - | - | - | - | - | - | - | - | 2251.0 | 2.1 | 4.442 | 0.004 | |
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