Spectroscopy — Tuning Electrical- and Photo-Conductivity by Cation Exchange within a Redox-Active Tetrathiafulvalene-Based Metal–Organic Framework

Measurement evidence

Spectroscopy

Tuning Electrical- and Photo-Conductivity by Cation Exchange within a Redox-Active Tetrathiafulvalene-Based Metal–Organic Framework · Zhou Y., Yu F., Su J. et al. · Angewandte Chemie - International Edition · 2020 · 18763-18767

3 measurement groups · 9 results

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

Electron paramagnetic resonance using Bruker EMX-10/12.

MV@1 crystals · Single Crystal

90 K spectra at 9.4451 GHz; variable-temperature 90-270 K; UV exposure 20 min for irradiated sample.

Temperature
90; variable 90-270
Geometry
Polycrystalline sample
Context
Guest-loaded MV2+ exchanged framework.
Measurement source
18765 · Results and Discussion · Figure 3; Figures S14-S15
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
EPR microwave frequency9.4451 GHzCaption
Exact Reported
18765 · Figure 3 · Figure 3
variable-temperature EPR range90-270 KrangeCaption
Range
18765 · Figure 3 caption · Figure 3b
TTF@1 broad EPR signalbroad signal at g approximately 2approximatelyText
Approximate
18765 · Results and Discussion · Figure 3a
MV@1 EPR intensity increase after 365 nm irradiationresonance intensities nearly doubled after 365 nm irradiation for 20 minnearlyText
Approximate
18765 · Results and Discussion · Figure 3a

1H NMR of D2SO4-digested MOF in d6-DMSO.

TTF@1 crystals · Single Crystal

Framework decomposed by D2SO4 because MOF is insoluble.

Geometry
Dissolved/digested sample
Context
Exchange completeness for TTF@1 and MV@1.
Measurement source
S11 · Figure S9 caption · Figure S9
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
MV@1 cation exchange completeness by 1H NMR[Me2NH2]+ 2.57 ppm fully replaced by MV2+ peaks at 4.43, 8.73, 8.75, 9.26, 9.28 ppmCaption
Qualitative
S11 · Figure S9 caption · Figure S9
TTF@1 cation exchange completeness by 1H NMR[Me2NH2]+ 2.57 ppm fully replaced by TTF*+ 6.66 ppmCaption
Qualitative
S11 · Figure S9 caption · Figure S9

Solid-state UV/Vis-NIR diffuse reflectance spectroscopy.

MV@1 crystals · Single Crystal

Room temperature; PE Lambda 900 UV-vis spectrometer with integrating sphere; BaSO4 reference; 300-2000 nm.

Temperature
room temperature
Geometry
Finely ground powder coated on BaSO4 reference plate
Context
Comparison among Me2NH2@1, TTF@1 and MV@1.
Measurement source
18765 · Results and Discussion · Figure 2
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
common absorption edgeca. 600 nmca.Text
Approximate
18765 · Results and Discussion · Figure 2
MV@1 low-energy absorption bandsabsorption in 600-1000 nm and weak band at 1200 nmrange and weak bandText
Range
18765 · Results and Discussion · Figure 2
TTF@1 weak TTF*+ absorption peakweak peak at 750 nmweakText
Approximate
18765 · Results and Discussion · Figure 2