Spectroscopy — Underpinning the conductivity mechanism in wide bandgap metal organic framework through chemical sensing

Measurement evidence

Spectroscopy

Underpinning the conductivity mechanism in wide bandgap metal organic framework through chemical sensing · Pulumati N.B., Urs Mb K., Mandal S. et al. · AIP Advances · 2020 · 085105

2 measurement groups · 12 results

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

FTIR spectroscopy in transmission / KBr pellet technique

Infrared spectroscopy

50-50 Zn:Co ZIF powder · Powder

FTIR spectra of ZIF-8, ZIF-67, and 50-50 mixture; Table S2 assigns IR-active modes.

Context: Series comparison.
Measurement source: p004-p005 · FTIR analysis of MOFs · Fig. S2; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Aliphatic C-H stretching	3019 cm-1	—	—	SI Table Range	p005 · FTIR analysis of MOFs · Table S2
C-N stretching/out-of-plane bending modes	1596 and 731 cm-1	—	—	SI Table Range	p005 · FTIR analysis of MOFs · Table S2
C=N stretching mode	600 cm-1	—	—	SI Table Range	p005 · FTIR analysis of MOFs · Table S2
Hydrogen-bond vibration region	2500-3500 cm-1	—	reported range; numeric midpoint stored	SI Table Range	p005 · FTIR analysis of MOFs · Table S2
Metal-N stretching vibration	420-425 cm-1	—	reported range; numeric midpoint stored	SI Table Range	p005 · FTIR analysis of MOFs · Table S2
50-50 mixture broad metal-N absorption dip	broad absorption dip from 420 to 425 cm-1	—	reported range 420-425 cm-1; numeric midpoint stored	Text Range	p005 · FTIR analysis of MOFs · Fig. S2
N-H resonance/out-of-plane bending mode	1800 cm-1	—	—	SI Table Range	p005 · FTIR analysis of MOFs · Table S2

UV-visible absorption spectroscopy and Tauc analysis

UV-visible and optical absorption spectroscopy

50-50 Zn:Co ZIF powder · Powder

Spectra recorded from 200 nm to 800 nm with 1 nm step size for ZIF-8, ZIF-67, and 50-50 mixture.

Context: Comparison of pristine Zn ZIF, pristine Co ZIF, and mixed-metal sample.
Measurement source: p003-p004 · Experimental; Optical studies · Fig. 3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
50-50 Zn/Co ZIF optical bandgapMarked as a best value within this paper	5.3 eV	—	—	Text Rounded Reported	p004 · Optical studies · Fig. 3(b)
ZIF-67 absorption edge	600 nm	—	—	Text Rounded Reported	p004 · Optical studies · Fig. 3(a)
ZIF-67 optical bandgap	4.3 eV	—	—	Text Rounded Reported	p002 · Abstract
ZIF-8 absorption edge	below 250 nm	—	upper-bound descriptor: below 250 nm	Text Approximate	p004 · Optical studies · Fig. 3(a)
ZIF-8 optical bandgapMarked as a best value within this paper	5.3 eV	—	—	Text Rounded Reported	p002 · Abstract