Spectroscopy — Lowering Band Gap of an Electroactive Metal-Organic Framework via Complementary Guest Intercalation

Measurement evidence

Spectroscopy

Lowering Band Gap of an Electroactive Metal-Organic Framework via Complementary Guest Intercalation · Guo Z., Panda D.K., Gordillo M.A. et al. · ACS Applied Materials and Interfaces · 2017 · 32413-32417

5 measurement groups · 10 results

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

Solid-state EPR spectroscopy

TTF-doped DSNDI-based MOF-74 powder · Powder

EPR spectra of undoped and TTF-doped MOF-74 compared.

Context
Guest-loaded target sample vs pristine control
Measurement source
S-7 / render p007 · Figure S6 caption · Figure S6
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Pristine MOF EPR responseEPR silentText
Qualitative
p003 / article p.32415 · Main text · Figure S6
TTF-loaded MOF EPR responseEPR active; coexistence of TTF radical cations and DSNDI radical anionsText
Qualitative
p003 / article p.32415 · Main text · Figure S6

Solid-state 13C NMR and FT-IR spectroscopy

Activated DSNDI-based MOF-74 powder · Powder

DSNDI-based MOF-74 spectra compared with DSNDI ligand.

Context
Pristine framework characterisation
Measurement source
p002 / article p.32414 · Main text · Figures S1 and S2
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
NMR/FT-IR agreement with ligandsolid-state 13C NMR and FT-IR spectra of the MOF are in excellent agreement with DSNDI ligandText
Qualitative
p002 / article p.32414 · Main text · Figures S1 and S2

UV-vis-NIR spectroscopy

DSNDI ligand reference · Unknown

Ligand reference spectrum; optical band gap determined from onset of longest-wavelength absorption.

Context
Molecular reference
Measurement source
p002-p003 / article pp.32414-32415 · Main text · Figure 2b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
DSNDI optical band gapMarked as a best value within this paper~2.5 eV from onset at ~500 nmText
Approximate
p002-p003 / article pp.32414-32415 · Main text · Figure 2b

Diffuse-reflectance UV-vis-NIR spectroscopy

Activated DSNDI-based MOF-74 powder · Powder

UV-vis-NIR spectra of MOF-74 in absence of TTF guests; optical band gap from absorption onset.

Context
Pristine framework optical gap
Measurement source
S-2 / render p002 · General Materials and Methods · Figure 2b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
MOF UV-vis absorption maximumlambda_max = 410 nmText
Exact Reported
p003 / article p.32415 · Main text · Figure 2b
Optical band gapMarked as a best value within this paper2.1 eV from onset at 600 nmText
Rounded Reported
p003 / article p.32415 · Main text · Figure 2b

Diffuse-reflectance UV-vis-NIR spectroscopy

TTF-doped DSNDI-based MOF-74 powder · Powder

MOF-74 after soaking in TTF solution for 2 days; new charge-transfer band used to estimate optical band gap.

Context
Guest-loaded target sample vs pristine control
Measurement source
p003 / article p.32415 · Main text · Figure 2b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Direct electrical conductivity measurementnot reportedQualitative
Qualitative
p001 / article p.32413 · Abstract
Optical band-gap lowering vs parentMarked as a best value within this paper1.1 eV lower than parent materialText
Rounded Reported
p003 / article p.32415 · Main text · Figure 2b
Charge-transfer band centrecentered at 900 nmText
Rounded Reported
p003 / article p.32415 · Main text · Figure 2b
Optical band gap after TTF loadingMarked as a best value within this paper~1 eV from CT-band onset at 1250 nmText
Approximate
p003 / article p.32415 · Main text · Figure 2b