Spectroscopy — A New Electrically Conducting Metal–Organic Framework Featuring U-Shaped cis-Dipyridyl Tetrathiafulvalene Ligands

Measurement evidence

Spectroscopy

A New Electrically Conducting Metal–Organic Framework Featuring U-Shaped cis-Dipyridyl Tetrathiafulvalene Ligands · Gordillo M.A., Benavides P.A., Spalding K. et al. · Frontiers in Chemistry · 2021 · 726544

5 measurement groups · 15 results

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

diffuse reflectance spectroscopy and Tauc analysis

I2-treated sine-MOF powder · Powder

Diffuse-reflectance spectra measured from 200-1400 nm using an integrating sphere; optical bandgap determined from Tauc plot.

Geometry
powder diffuse reflectance
Context
I2-treated framework compared with pristine control
Measurement source
3 · Optical and Electrochemical Properties of sine-MOF · Figure 4B,C
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
bandgap narrowing on I2 treatment~0.6-0.7 eV narrower bandgap for I2-doped sine-MOFrangeText
Range
3 · Optical and Electrochemical Properties of sine-MOF · Figure 4C
I2-treated sine-MOF optical bandgapMarked as a best value within this paperEg = 1.2 eVText
Rounded Reported
3 · Optical and Electrochemical Properties of sine-MOF · Figure 4B,C

diffuse reflectance spectroscopy and Tauc analysis

pristine sine-MOF evacuated powder · Powder

Diffuse-reflectance spectra measured from 200-1400 nm using an integrating sphere; optical bandgap determined from Tauc plot.

Geometry
powder diffuse reflectance
Context
pristine framework
Measurement source
1 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
pristine sine-MOF broad DRS band centrebroad band centered on 480 nmText
Rounded Reported
3 · Optical and Electrochemical Properties of sine-MOF · Figure 4B
pristine sine-MOF optical bandgapEg = 1.8 eVText
Rounded Reported
3 · Optical and Electrochemical Properties of sine-MOF · Figure 4B,C

solid-state electron paramagnetic resonance (EPR)

I2-treated sine-MOF powder · Powder

Solid-state EPR recorded at room temperature on Bruker EMX EPR X-band spectrometer.

Temperature
room temperature
Geometry
solid-state powder
Context
I2-treated framework compared with pristine control
Measurement source
4 · Optical and Electrochemical Properties of sine-MOF · Figure 6
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
I2-treated EPR g valueg approx 2.006approxText
Approximate
4 · Optical and Electrochemical Properties of sine-MOF · Figure 6
I2-treated DPTTF radical-cation populationMarked as a best value within this paper6.1% DPTTF*+ populationText
Rounded Reported
4 · Optical and Electrochemical Properties of sine-MOF · Figure 6
I2-treated radical population by EPR mass basis2.6 x 10^16 spins/mgText
Rounded Reported
4 · Optical and Electrochemical Properties of sine-MOF · Figure 6
I2-treated radical population by molar basis3.6 x 10^22 spins/molText
Rounded Reported
4 · Optical and Electrochemical Properties of sine-MOF · Figure 6
I2-treated empirical formula from elemental analysisZn2C55H50O14S4N2I1.5Text
Exact Reported
4 · Optical and Electrochemical Properties of sine-MOF

solid-state electron paramagnetic resonance (EPR)

pristine sine-MOF evacuated powder · Powder

Solid-state EPR recorded at room temperature on Bruker EMX EPR X-band spectrometer.

Temperature
room temperature
Geometry
solid-state powder
Context
pristine framework
Measurement source
1 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
pristine DPTTF radical-cation population0.01% DPTTF*+ populationText
Rounded Reported
4 · Optical and Electrochemical Properties of sine-MOF · Figure 6
pristine EPR signalweak EPR signalText
Qualitative
4 · Optical and Electrochemical Properties of sine-MOF · Figure 6
pristine radical population by EPR mass basis6.8 x 10^13 spins/mgText
Rounded Reported
4 · Optical and Electrochemical Properties of sine-MOF · Figure 6
pristine radical population by molar basis7.6 x 10^19 spins/molText
Rounded Reported
4 · Optical and Electrochemical Properties of sine-MOF · Figure 6

UV-vis absorption spectroscopy

Z-DPTTF ligand in DMF · Model

Z-DPTTF ligand measured in DMF on Shimadzu UV-2600 spectrophotometer.

Geometry
solution in DMF
Context
molecular ligand model comparison
Measurement source
4 · Optical and Electrochemical Properties of sine-MOF · Figure 4A
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Z-DPTTF optical bandgap2.3 eVText
Rounded Reported
3 · Optical and Electrochemical Properties of sine-MOF · Figure 4A
Z-DPTTF UV-vis absorption maximumabout 420 nm inferred from 480 nm MOF band being ca. 60 nm red-shifted from ligand lambda_maxinferred from reported shiftCalculated From Reported
Approximate
3 · Optical and Electrochemical Properties of sine-MOF · Figure 4A,B