Spectroscopy — A chiral SrSi2 (srs) superstructure constructed by a dual interaction system showing isotropic electrical conductivity

5 measurement groups · 11 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

Crystals of compound 1 · Single Crystal

IR spectra recorded from 4000 to 400 cm-1; bands assigned to benzene ring stretching vibrations.

Context: pristine and regenerated framework comparison
Measurement source: SI office text · Materials and Physical Measurements · Fig. S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
IR benzene-ring stretch band	about 1460 cm-1	1460 cm^-1	—	Caption Approximate	SI office text · IR and PXRD patterns for 1 and regenerated 1 · Fig. S1
IR benzene-ring stretch band	about 1620 cm-1	1620 cm^-1	—	Caption Approximate	SI office text · IR and PXRD patterns for 1 and regenerated 1 · Fig. S1

Regenerated compound 1 crystals · Single Crystal

SI Fig. S8 reports the regenerated-sample diffuse-reflectance spectrum; the rendered inset Tauc plot is labelled Eg = 2.29 eV.

Geometry: regenerated crystalline sample
Context: regenerated pristine framework
Measurement source: SI rendered p.9 · I-V curve and UV-vis-NIR spectrum of regenerated 1 · Fig. S8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Regenerated compound 1 optical band gap	Eg = 2.29 eV from rendered Tauc-plot inset	2.29 eV	visual reading from labelled figure inset	Figure Axis Approximate	SI rendered p.9 · Figure plot · Fig. S8 inset

Compound 1 dissolved in DMF · Unknown

Solution prepared by dissolving 1.0 mg compound 1 in 1.0 mL DMF; CD spectra measured on MOS-450 spectrophotometer.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Approximate CD minimum from rendered plot	about -30 mdeg near 265 nm	-30 mdeg	visual estimate from plotted axis	Figure Axis Approximate	main p.3 · Figure plot · Fig. 2
CD Cotton effect	negative Cotton effect for both absorptions	—	—	Text Qualitative	main p.3 · Main text · Fig. 2
Solution UV absorption peak	about 266 nm	266 nm	—	Text Approximate	main p.2 · Main text · Fig. 2
Solution UV absorption band	about 328 nm	328 nm	—	Text Approximate	main p.2 · Main text · Fig. 2

Powdered crystalline compound 1 · Powder

Cary 5000 spectrophotometer at room temperature, 200-2500 nm, integrating sphere; reflection converted to absorbance by Kubelka-Munk method.

Geometry: powdered crystalline sample
Context: pristine crystalline powder
Measurement source: SI office text · Materials and Physical Measurements · Fig. 3b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Strong absorption band	broad strong absorption band in 200-400 nm	—	—	Text Range	main p.3 · Main text · Fig. 3b
Diffuse-reflectance measurement range	200-2500 nm	—	—	Text Range	SI office text · Materials and Physical Measurements
Experimental optical band gapMarked as a best value within this paper	approximately 2.33 eV	2.33 eV	—	Text Approximate	main p.3 · Main text · Fig. 3b

Crystals of compound 1 · Single Crystal

ThermoFisher ESCALAB 250 Xi; C 1s line at 284.8 eV used as reference; XPS used to confirm OTf- in compound 1.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OTf- presence	OTf- confirmed by XPS	—	—	Text Qualitative	main p.2 · Main text · Fig. S3