Spectroscopy — Effects of intervalence charge transfer interaction between π-stacked mixed valent tetrathiafulvalene ligands on the electrical conductivity of 3D metal-organic frameworks

Measurement evidence

Spectroscopy

Effects of intervalence charge transfer interaction between π-stacked mixed valent tetrathiafulvalene ligands on the electrical conductivity of 3D metal-organic frameworks · Zhang S., Panda D.K., Yadav A. et al. · Chemical Science · 2021 · 13379-13391

12 measurement groups · 27 results

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

UV-Vis-NIR diffuse reflectance spectroscopy; Tauc plot

Cs-MOF 4 · Powder

Shimadzu UV-2600/ISR-2600 Plus (400-1400 nm) and Cary 7000 up to 2400 nm; direct optical band gap from Tauc plots.

Geometry
powder diffuse-reflectance measurement
Context
pristine framework sample state
Measurement source
S3 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
weak IVCT-like NIR featurevery weak ~1900 nm peakText
Approximate
13385 · Optical properties and IVCT interaction · Fig. 5
direct optical band gap Eopt2.11Table
Exact Reported
13385 · Optical properties and IVCT interaction · Table 2/Fig. 6

UV-Vis-NIR diffuse reflectance spectroscopy; Tauc plot

K-MOF 2 · Powder

Shimadzu UV-2600/ISR-2600 Plus (400-1400 nm) and Cary 7000 up to 2400 nm; direct optical band gap from Tauc plots.

Geometry
powder diffuse-reflectance measurement
Context
pristine framework sample state
Measurement source
S3 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
neutral TTFTC ligand band positionca. 500 nmText
Approximate
13385 · Optical properties and IVCT interaction · Fig. 5
direct optical band gap Eopt1.99Table
Exact Reported
13385 · Optical properties and IVCT interaction · Table 2/Fig. 6

UV-Vis-NIR diffuse reflectance spectroscopy; Tauc plot

K-MOF 2-ox · Powder

Shimadzu UV-2600/ISR-2600 Plus (400-1400 nm) and Cary 7000 up to 2400 nm; direct optical band gap from Tauc plots.

Geometry
powder diffuse-reflectance measurement
Context
pristine framework sample state
Measurement source
S3 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
IVCT NIR band positionca. 2000 nm (ca. 5000 cm^-1)Text
Approximate
13385 · Optical properties and IVCT interaction · Fig. 5
TTFTC radical-cation band positionca. 750 nm (ca. 13300 cm^-1)Text
Approximate
13385 · Optical properties and IVCT interaction · Fig. 5
direct optical band gap Eopt1.35Table
Exact Reported
13385 · Optical properties and IVCT interaction · Table 2/Fig. 6

UV-Vis-NIR diffuse reflectance spectroscopy; Tauc plot

Na-MOF 1-ox · Powder

Shimadzu UV-2600/ISR-2600 Plus (400-1400 nm) and Cary 7000 up to 2400 nm; direct optical band gap from Tauc plots.

Geometry
powder diffuse-reflectance measurement
Context
pristine framework sample state
Measurement source
S3 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
IVCT NIR band positionca. 2000 nm (ca. 5000 cm^-1)Text
Approximate
13385 · Optical properties and IVCT interaction · Fig. 5
TTFTC radical-cation band positionca. 750 nm (ca. 13300 cm^-1)Text
Approximate
13385 · Optical properties and IVCT interaction · Fig. 5
direct optical band gap EoptMarked as a best value within this paper1.33Table
Exact Reported
13385 · Optical properties and IVCT interaction · Table 2/Fig. 6

UV-Vis-NIR diffuse reflectance spectroscopy; Tauc plot

Rb-MOF 3 · Powder

Shimadzu UV-2600/ISR-2600 Plus (400-1400 nm) and Cary 7000 up to 2400 nm; direct optical band gap from Tauc plots.

Geometry
powder diffuse-reflectance measurement
Context
pristine framework sample state
Measurement source
S3 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
neutral TTFTC ligand band positionca. 500 nmText
Approximate
13385 · Optical properties and IVCT interaction · Fig. 5
direct optical band gap Eopt2.12Table
Exact Reported
13385 · Optical properties and IVCT interaction · Table 2/Fig. 6

UV-Vis-NIR diffuse reflectance spectroscopy; Tauc plot

Rb-MOF 3-ox · Powder

Shimadzu UV-2600/ISR-2600 Plus (400-1400 nm) and Cary 7000 up to 2400 nm; direct optical band gap from Tauc plots.

Geometry
powder diffuse-reflectance measurement
Context
pristine framework sample state
Measurement source
S3 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
IVCT NIR band positionca. 2000 nm (ca. 5000 cm^-1)Text
Approximate
13385 · Optical properties and IVCT interaction · Fig. 5
TTFTC radical-cation band positionca. 750 nm (ca. 13300 cm^-1)Text
Approximate
13385 · Optical properties and IVCT interaction · Fig. 5
direct optical band gap Eopt1.37Table
Exact Reported
13385 · Optical properties and IVCT interaction · Table 2/Fig. 6

solid-state quantitative ESR/EPR

Cs-MOF 4 · Powder

Bruker EMX EPR X-band at room temperature; double integration used to quantify unpaired spins.

Temperature
293
Atmosphere
ambient
Geometry
powder in precision-bore 4 mm quartz tube
Context
pristine framework sample state
Measurement source
S2 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
TTFTC radical-cation population0.3% (0.003 spin/TTFTC ligand)Table
Rounded Reported
13385 · Solid-state ESR analysis · Table 2
unpaired spins per mol1.60 × 10^21 spins/molText
Rounded Reported
13384 · Solid-state ESR analysis · Fig. 3

solid-state quantitative ESR/EPR

K-MOF 2 · Powder

Bruker EMX EPR X-band at room temperature; double integration used to quantify unpaired spins.

Temperature
293
Atmosphere
ambient
Geometry
powder in precision-bore 4 mm quartz tube
Context
pristine framework sample state
Measurement source
S2 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
TTFTC radical-cation population16% (0.16 spin/TTFTC ligand)Table
Exact Reported
13385 · Solid-state ESR analysis · Table 2
unpaired spins per mol9.42 × 10^22 spins/molText
Rounded Reported
13384 · Solid-state ESR analysis · Fig. 3

solid-state quantitative ESR/EPR

K-MOF 2-ox · Powder

Bruker EMX EPR X-band at room temperature; double integration used to quantify unpaired spins.

Temperature
293
Atmosphere
ambient
Geometry
powder in precision-bore 4 mm quartz tube
Context
pristine framework sample state
Measurement source
S2 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
TTFTC radical-cation populationMarked as a best value within this paper25% (0.25 spin/TTFTC ligand)Table
Exact Reported
13385 · Solid-state ESR analysis · Table 2
unpaired spins per mol1.53 × 10^23 spins/molText
Rounded Reported
13384 · Solid-state ESR analysis · Fig. 3

solid-state quantitative ESR/EPR

Na-MOF 1-ox · Powder

Bruker EMX EPR X-band at room temperature; double integration used to quantify unpaired spins.

Temperature
293
Atmosphere
ambient
Geometry
powder in precision-bore 4 mm quartz tube
Context
pristine framework sample state
Measurement source
S2 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
TTFTC radical-cation population23% (0.23 spin/TTFTC ligand)Table
Exact Reported
13385 · Solid-state ESR analysis · Table 2
unpaired spins per mol1.40 × 10^23 spins/molText
Rounded Reported
13384 · Solid-state ESR analysis · Fig. 3

solid-state quantitative ESR/EPR

Rb-MOF 3 · Powder

Bruker EMX EPR X-band at room temperature; double integration used to quantify unpaired spins.

Temperature
293
Atmosphere
ambient
Geometry
powder in precision-bore 4 mm quartz tube
Context
pristine framework sample state
Measurement source
S2 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
TTFTC radical-cation population0.5% (0.005 spin/TTFTC ligand)Table
Rounded Reported
13385 · Solid-state ESR analysis · Table 2
unpaired spins per mol2.79 × 10^21 spins/molText
Rounded Reported
13384 · Solid-state ESR analysis · Fig. 3

solid-state quantitative ESR/EPR

Rb-MOF 3-ox · Powder

Bruker EMX EPR X-band at room temperature; double integration used to quantify unpaired spins.

Temperature
293
Atmosphere
ambient
Geometry
powder in precision-bore 4 mm quartz tube
Context
pristine framework sample state
Measurement source
S2 · General Materials and Methods
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
TTFTC radical-cation population10% (0.1 spin/TTFTC ligand)Table
Exact Reported
13385 · Solid-state ESR analysis · Table 2
unpaired spins per mol6.20 × 10^22 spins/molText
Rounded Reported
13384 · Solid-state ESR analysis · Fig. 3