Measurement evidence
Confinement of single polysilane chains in coordination nanospaces · Kitao T., Bracco S., Comotti A. et al. · Journal of the American Chemical Society · 2015 · 5231-5238
Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.
1a-PMPrS powder composite, 30 wt percent PMPrS · Powder
29Si MAS NMR at 59.6 MHz with recycle delay of 100 s.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 29Si downfield conformation signal | deltaSi about -32 ppm | — | about | Text Approximate | p005 · Conformation of PMPrS in 1 · Figure 5a |
1a-PMPrS powder composite, 30 wt percent PMPrS · Powder
PMLG HETCOR spectra with contact times of 2 and 8 ms; 600 MHz 1H DQ CRAMPS at 13.6 kHz spinning.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 1a-PMPrS host-guest contact distance inferred from HETCOR | host-guest interactions at short distances of less than 5 A | — | less than | Text Approximate | p004 · Results and Discussion - Characterization · Figure 3 |
1a-PMPrS powder composite, 30 wt percent PMPrS · Powder
High-resolution 1H MAS NMR at 600 MHz; MAS spinning speed 33 kHz.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 1a-PMPrS host ligand to PMPrS monomer molar ratio | 1:1.1 | — | — | Text Exact Reported | p004 · Results and Discussion - Characterization · Figure S5 |
1a-PMPrS powder composite, 30 wt percent PMPrS · Powder
LabRAM HR-800; 785 nm laser; 300-353 K hot stage.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 1a-PMPrS Raman conformation | v(Si-C) peak intensity of 1a-PMPrS was higher than 1b-PMPrS, indicating more linear/s-trans conformation. | — | — | Text Qualitative | p005 · Conformation of PMPrS in 1 · Figure 4 |
| bulk PMPrS Raman change on heating | Bulk PMPrS from room temperature to 80 C underwent a large peak-intensity change. | 353.15 K | — | Text Rounded Reported | p005 · Conformation of PMPrS in 1 · Figure 4 |
| Raman Si-C conformation marker | symmetric stretching vibration v(Si-C) at ca. 670 cm-1 | — | ca. | Text Approximate | p005 · Conformation of PMPrS in 1 · Figure 4 |
1a-PMPrS powder composite, 30 wt percent PMPrS · Powder
355 nm excitation at 1.0 x 10^16 photons cm-2; spectra measured before and after adding MeOH quencher.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| methanol quenching of transient radical/silylene band | The around-450 nm TAS peak disappeared after addition of methanol. | — | around | Text Qualitative | p006 · UV Stability of PMPrS in 1 · Figure S10 |
| 1a-PMPrS transient absorption radical/silylene band | broad peak around 450 nm before MeOH addition | — | around | Text Approximate | p006 · UV Stability of PMPrS in 1 · Figure S10 |
1b-PMPrS powder composite, 30 wt percent PMPrS · Powder
29Si MAS NMR at 59.6 MHz with recycle delay of 100 s.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| Si-Si-Si-C1 dihedral deviation for quasi-eclipsed conformation | about 30 degrees away from trans | — | about | Text Approximate | p005 · Conformation of PMPrS in 1 · Figure 5a-b |
| 29Si upfield conformation signal | deltaSi about -36 ppm | — | about | Text Approximate | p005 · Conformation of PMPrS in 1 · Figure 5b |
1b-PMPrS powder composite, 30 wt percent PMPrS · Powder
PMLG HETCOR spectra of 1b-PMPrS with contact times of 5 and 8 ms as shown in SI.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 1b-PMPrS host-guest proximity relative to 1a | Confined polymer chains are located at longer distances from host ligands in 1b than in 1a. | — | — | Text Qualitative | p004 · Results and Discussion - Characterization · Figure S6 |
1b-PMPrS powder composite, 30 wt percent PMPrS · Powder
High-resolution 1H MAS NMR at 600 MHz; MAS spinning speed 33 kHz.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 1b-PMPrS host ligand to PMPrS monomer molar ratio | 1:1.3 | — | — | Text Exact Reported | p004 · Results and Discussion - Characterization · Figure S5 |
1b-PMPrS powder composite, 30 wt percent PMPrS · Powder
LabRAM HR-800; 785 nm laser; 300-353 K hot stage.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|
PMPrS extracted from UV-irradiated 1a-PMPrS · Unknown
1-PMPrS and bulk PMPrS irradiated under air with 500 W mercury lamp, 300-400 nm, 24 h at room temperature; spectra of extracted PMPrS recorded in hexane.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| 1a-confined PMPrS 302 nm peak after UV irradiation | Peak at 302 nm unchanged after UV irradiation and extraction. | — | — | Text Qualitative | p006 · UV Stability of PMPrS in 1 · Figure 7 |
| 1b-confined PMPrS 302 nm peak after UV irradiation | Peak at 302 nm unchanged after UV irradiation and extraction. | — | — | Text Qualitative | p006 · UV Stability of PMPrS in 1 · Figure 7 |
| bulk PMPrS 302 nm peak after UV irradiation | Peak intensity at 302 nm decreased after UV irradiation. | — | — | Text Qualitative | p006 · UV Stability of PMPrS in 1 · Figure 7 |