Spectroscopy — Tunable Charge Transport and Spin Dynamics in Two-Dimensional Conjugated Metal-Organic Frameworks

Measurement evidence

Spectroscopy

Tunable Charge Transport and Spin Dynamics in Two-Dimensional Conjugated Metal-Organic Frameworks · Lu Y., Hu Z., Petkov P. et al. · Journal of the American Chemical Society · 2024 · 2574-2582

6 measurement groups · 34 results

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

Continuous-wave ESR and variable-temperature ESR

Ni3(HATI_H)2 black powder · Powder

Powder heated at 150 C under vacuum for 2 h, sealed in quartz ESR tube under He; X-band CW ESR from 10-300 K.

Temperature
10-300
Atmosphere
He-sealed ESR tube
Geometry
powder in quartz ESR tube
Context
pristine framework
Measurement source
p006 · Spin Dynamic Behavior · Figure 4; Table 1; Figure S13
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
ESR g valueg = 2.0052Figure Axis
Exact Reported
p024 · Supplementary Figures · Figure S13a
room-temperature spin density1.9 x 10^20 mol-1 / 0.19 x 10^21 mol-1Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
spin-lattice relaxation time T1too weak to be recorded even at 5 KText
Qualitative
p006 · Spin Dynamic Behavior · Figure 4

Continuous-wave ESR, spin susceptibility fitting and pulsed EPR

Ni3(HATI_iPr)2 black powder · Powder

Powder heated at 150 C under vacuum for 2 h, sealed in quartz ESR tube under He; X-band CW ESR and 9.70 GHz pulsed EPR.

Temperature
5-300
Atmosphere
He-sealed ESR tube
Geometry
powder in quartz ESR tube
Context
pristine framework
Measurement source
p006-p007 · Spin Dynamic Behavior · Figure 4c-e; Table 1; Figure S16
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Pauli susceptibilityMarked as a best value within this paper1.69(5) x 10^-5 emu mol-1(5)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
Curie constant C0.80(8) x 10^-3 emu K mol-1(8)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
ESR g valueg = 2.0045Figure Axis
Exact Reported
p024 · Supplementary Figures · Figure S13d
localized spin density nspin1.28(12) x 10^21 cm-3(12)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
density of states at EF from Pauli susceptibilityMarked as a best value within this paper31.5(10) x 10^22 eV-1 cm-3(10)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
room-temperature spin densityMarked as a best value within this paper5.96 x 10^21 mol-1Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
maximum observed T1Marked as a best value within this paperup to ~60 usText
Approximate
p001 · Abstract · Figure 4e
spin-spin relaxation time T2~100 nsvisual/text approximateText
Approximate
p007 · Spin Dynamic Behavior · Figure 4e

Continuous-wave ESR, spin susceptibility fitting and pulsed EPR

Ni3(HATI_nPr)2 black powder · Powder

Powder heated at 150 C under vacuum for 2 h, sealed in quartz ESR tube under He; X-band CW ESR and 9.70 GHz pulsed EPR.

Temperature
5-300
Atmosphere
He-sealed ESR tube
Geometry
powder in quartz ESR tube
Context
pristine framework
Measurement source
p006-p007 · Spin Dynamic Behavior · Figure 4e; Table 1; Figure S16
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Pauli susceptibility0.49(2) x 10^-5 emu mol-1(2)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
Curie constant C1.35(3) x 10^-3 emu K mol-1(3)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
ESR g valueg = 2.0027Figure Axis
Exact Reported
p024 · Supplementary Figures · Figure S13c
localized spin density nspin2.17(6) x 10^21 cm-3(6)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
density of states at EF from Pauli susceptibility9.1(4) x 10^22 eV-1 cm-3(4)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
room-temperature spin density2.50 x 10^21 mol-1Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
maximum observed T1~20 usvisual estimate from Figure 4eFigure Axis
Approximate
p005 · Spin Dynamic Behavior · Figure 4e
spin-spin relaxation time T2~100 nsvisual/text approximateText
Approximate
p007 · Spin Dynamic Behavior · Figure 4e

Continuous-wave ESR, spin susceptibility fitting and pulsed EPR

Ni3(HATI_vPr)2 black powder · Powder

Powder heated at 150 C under vacuum for 2 h, sealed in quartz ESR tube under He; X-band CW ESR and 9.70 GHz pulsed EPR.

Temperature
5-300
Atmosphere
He-sealed ESR tube
Geometry
powder in quartz ESR tube
Context
pristine framework
Measurement source
p006-p007 · Spin Dynamic Behavior · Figure 4e; Table 1; Figure S16
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Pauli susceptibility0.40(2) x 10^-5 emu mol-1(2)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
Curie constant CMarked as a best value within this paper1.37(5) x 10^-3 emu K mol-1(5)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
ESR g valueg = 2.0020Figure Axis
Exact Reported
p024 · Supplementary Figures · Figure S13b
localized spin density nspinMarked as a best value within this paper2.20(9) x 10^21 cm-3(9)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
density of states at EF from Pauli susceptibility7.4(4) x 10^22 eV-1 cm-3(4)Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
room-temperature spin density1.89 x 10^21 mol-1Table
Exact Reported
p006 · Spin Dynamic Behavior · Table 1
maximum observed T1~25 usvisual estimate from Figure 4eFigure Axis
Approximate
p005 · Spin Dynamic Behavior · Figure 4e
spin-spin relaxation time T2~100 nsvisual/text approximateText
Approximate
p007 · Spin Dynamic Behavior · Figure 4e

Vis-NIR absorption spectroscopy and Tauc analysis

Ni3(HATI_H)2 black powder · Powder

Room-temperature UV/vis/NIR absorption; optical gaps estimated from Tauc plots.

Temperature
room temperature
Context
pristine framework series; results include all four samples
Measurement source
p004 · Optoelectronic and Charge Transport Properties · Figure 3a; Figure S9
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
optical gap from Tauc plot0.26 eVText
Exact Reported
p004 · Optoelectronic and Charge Transport Properties · Figure S9
optical gap from Tauc plotMarked as a best value within this paper0.68 eVText
Exact Reported
p004 · Optoelectronic and Charge Transport Properties · Figure S9
optical gap from Tauc plot0.49 eVText
Exact Reported
p004 · Optoelectronic and Charge Transport Properties · Figure S9
optical gap from Tauc plot0.46 eVText
Exact Reported
p004 · Optoelectronic and Charge Transport Properties · Figure S9

XPS and FT-IR spectroscopy

Ni3(HATI_H)2 black powder · Powder

High-resolution XPS for Ni 2p and N 1s; FT-IR with ATR accessory.

Temperature
room temperature
Atmosphere
XPS under ultrahigh vacuum
Geometry
films on heavily doped n-type Si wafers for XPS
Context
pristine framework series; results include all four samples
Measurement source
p002 · Synthesis and Characterization · Figures S1-S3
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
FT-IR coordination evidenceN-H stretch vibration band disappears after coordination polymerisationText
Qualitative
p002 · Synthesis and Characterization · Figure S3
Ni oxidation state by XPSNi(II) present in all 2D c-MOFsText
Qualitative
p002 · Synthesis and Characterization · Figures S1-S2
absence of extraneous cationsNa+ peaks were not observed; neutral state suggestedText
Qualitative
p002 · Synthesis and Characterization · Figure S2