Spectroscopy — Large π-Conjugated Metal-Organic Frameworks for Infrared-Light-Driven CO2Reduction

Measurement evidence

Spectroscopy

Large π-Conjugated Metal-Organic Frameworks for Infrared-Light-Driven CO2Reduction · Zeng J.-Y., Wang X.-S., Xie B.-R. et al. · Journal of the American Chemical Society · 2022 · 1218-1231

4 measurement groups · 18 results

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

in situ EPR

TNP-MOF crystals · Single Crystal

140 K under N2; NIR irradiation λ ≥ 730 nm; TEOA introduced; TNP linker control

Atmosphere
N2
Context
pristine MOF
Measurement source
1227-1228 · Mechanisms of NIR-Light-Driven CO2 Reduction · Figure 7B,C; Figure S104
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
TNP-MOF radical responsemuch enhanced π-conjugated cation radical signal upon NIR light irradiationText
Qualitative
1228 · Mechanisms · Figure 7C
EPR g valueg = 2.003Text
Exact Reported
1227 · Mechanisms · Figure 7B
TNP linker EPR controlsignal remained unaltered after NIR illuminationText
Qualitative
S110 · Section 11 In situ EPR · Figure S104

femtosecond transient absorption spectroscopy

TNP-MOF crystals · Single Crystal

TNP linker and TNP-MOF compared under 510 nm pump; TNP-MOF also under 760 nm pump

Context
pristine MOF
Measurement source
1226-1227 · Photoinduced Change Separation Characterization · Figure 6
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
NIR-induced charge separationcharge separation state can also be induced under NIR light irradiationText
Qualitative
1227 · Photoinduced Change Separation Characterization · Figure 6G-I
mof tau12.85 ± 0.18 ps± 0.18 psText
Exact Reported
1226-1227 · Photoinduced Change Separation Characterization · Figure 6
mof tau226.68 ± 1.58 ps± 1.58 psText
Exact Reported
1226-1227 · Photoinduced Change Separation Characterization · Figure 6
tnp tau13.73 ± 0.36 ps± 0.36 psText
Exact Reported
1226-1227 · Photoinduced Change Separation Characterization · Figure 6
tnp tau255.67 ± 3.6 ps± 3.6 psText
Exact Reported
1226-1227 · Photoinduced Change Separation Characterization · Figure 6
tnp tau32172.81 ± 128.58 ps± 128.58 psText
Exact Reported
1226-1227 · Photoinduced Change Separation Characterization · Figure 6

steady-state PL quantum yield comparison

TNP-MOF crystals · Single Crystal

MOF samples in DMF suspension; Table S18 reports linker and MOF fluorescence

Context
pristine MOF
Measurement source
S109 · Table S18 · Table S18
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
TBCP-MOF fluorescence quantum yield6.1 %SI Table
Exact Reported
S109 · Table S18 · Table S18
TBML-MOF fluorescence quantum yield< 0.1 %SI Table
Approximate
S109 · Table S18 · Table S18
TML-MOF fluorescence quantum yield2.8 %SI Table
Exact Reported
S109 · Table S18 · Table S18
TM-MOF fluorescence quantum yield3.4 %SI Table
Exact Reported
S109 · Table S18 · Table S18
TNP-MOF fluorescence quantum yield< 0.1 %SI Table
Approximate
S109 · Table S18 · Table S18

XPS and in situ NAP-XPS

TNP-MOF crystals · Single Crystal

0.5 mbar CO2 at 300 K; routine XPS before/after NIR and after CO2 photoreduction

Context
pristine MOF
Measurement source
1228 · Mechanisms · Figure 7D-F; Figure S105
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Zr XPS feature184.23 eVText
Exact Reported
S111 · Mechanisms/NAP-XPS · Figure 7F; Figure S105
Zr XPS feature186.66 eVText
Exact Reported
S111 · Mechanisms/NAP-XPS · Figure 7F; Figure S105
Zr XPS feature182.0 eVText
Exact Reported
1228 · Mechanisms/NAP-XPS · Figure 7F; Figure S105
Zr XPS feature182.5 eVText
Exact Reported
1228 · Mechanisms/NAP-XPS · Figure 7F; Figure S105