| Electron backscatter diffraction | The {100} pole was located at the center point; the orientation of the bulk lattice and the rotational orientation of the crystal were indicated by the diffraction spots from the {110} and {111} planes |
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Ian Martin, Carlos Fernández-Cabán, Andrew J. Gellman. “Structure sensitive enantioselectivity on surfaces: tartaric acid decomposition on all surfaces vicinal to Cu(100).” ChemRxiv (). https://doi.org/10.26434/chemrxiv.15007668/v1
Values presented only in the SR-XPS coverage maps and diffraction-pattern images in the main paper, pp. 11, 13–18, and SI, pp. 32–34, were not transcribed. The supporting information is appended to the main paper
| O 1s spatially resolved X-ray photoelectron spectroscopy, 433 K | Slow initiation from 0 to 1400 s; explosive autocatalytic acceleration from 1400 to 1550 s; the adsorbed D-tartaric-acid coverage reached zero after the explosion step |
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| O 1s spatially resolved X-ray photoelectron spectroscopy, rate-law fit | Initiation rate constant 2.0 × 10⁻⁵ s⁻¹; explosion rate constant 5.7 × 10⁻² s⁻¹ MLᵥ⁻²; coverage half-time t₁/₂ = 1470 s at 0.5 ML |
| O 1s spatially resolved X-ray photoelectron spectroscopy, intermittent temperature quenching | Coverage half-times were underestimated by a factor of approximately 2 |
| O 1s spatially resolved X-ray photoelectron spectroscopy, 433 K | Coverage decay curves from all 169 orientations showed initiation and explosion features for both enantiomers. The coverage maps showed four-fold rotational symmetry. At 31 % extent of reaction, decomposition began in regions with high step-edge density; D- and L-tartaric-acid decomposition began in the R- and S-chirality regions, respectively, producing mirror symmetry between the enantiomers. Maps from 31 to 70 % extent of reaction showed diastereomerism. From 75 to 85 % extent of reaction, Cu(100) was more reactive than some highly stepped and kinked orientations |
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| O 1s spatially resolved X-ray photoelectron spectroscopy, rate-law fits | The initiation and explosion rate constants showed no clear dependence on surface orientation and no notable symmetry; their dependence on surface orientation was below the detection limit |