Electrical Transport — Chemiresistive Detection of Gaseous Hydrocarbons and Interrogation of Charge Transport in Cu[Ni(2,3-pyrazinedithiolate) 2 ] by Gas Adsorption

4 measurement groups · 9 results

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

AC impedance spectroscopy on a two-contact pressed pellet

Electrical conductivity Impedance spectroscopy

Pressed-pellet Cu[Ni(pdt)2] transport sample · Pellet

Ar-filled glovebox; activated Cu[Ni(pdt)2] pressed in a two-contact PEEK screw cell; Bio-Logic VMP-3; 1 MHz to 0.01 Hz; 100 mV sinus amplitude; 0 mV dc bias.

Temperature: 298
Atmosphere: Ar / activated sample
Geometry: Two-contact PEEK screw cell pressed pellet
Context: Pristine activated framework pellet
Measurement source: main p.5006 · Ac Impedance Measurements · Figures S3-S8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
AC impedance frequency range	1 MHz to 0.01 Hz	—	—	Text Exact Reported	main p.5006 · Ac Impedance Measurements
AC impedance relaxation behaviour	single ohmic Debye-type relaxation mode with a single time constant	—	—	Text Qualitative	main p.5008 · Hopping Charge Transport in Cu[Ni(pdt)2] · Figure S3

Conductivity after saturated acetonitrile-vapour exposure

Electrical conductivity

Acetonitrile-vapour exposed Cu[Ni(pdt)2].xCH3CN · Pellet

Cu[Ni(pdt)2] exposed to saturated acetonitrile vapour at room temperature for 12 h.

Temperature: 298
Atmosphere: Saturated CH3CN vapour
Geometry: Pressed pellet conductivity context
Context: Guest-loaded framework
Measurement source: main p.5008 · Hopping Charge Transport in Cu[Ni(pdt)2]

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Acetonitrile-solvated conductivity	0.015 uS/cm	1.5e-8 S/cm	—	Text Rounded Reported	main p.5008 · Hopping Charge Transport in Cu[Ni(pdt)2]
Conductivity decrease on acetonitrile solvation	nearly 200 times lower than the conductivity measured for the desolvated framework	—	—	Text Approximate	main p.5008 · Hopping Charge Transport in Cu[Ni(pdt)2]

Two-contact pressed-pellet conductivity measurement

Electrical conductivity

Pressed-pellet Cu[Ni(pdt)2] transport sample · Pellet

Guest-free activated Cu[Ni(pdt)2] pressed pellet measured at room temperature.

Temperature: 298
Atmosphere: Activated, guest-free
Geometry: Two-contact pressed pellet
Context: Pristine activated framework pellet
Measurement source: main p.5008 · Hopping Charge Transport in Cu[Ni(pdt)2]

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Guest-free pressed-pellet conductivityMarked as a best value within this paper	2.6 uS/cm	0.0000026 S/cm	—	Text Rounded Reported	main p.5008 · Hopping Charge Transport in Cu[Ni(pdt)2]

Time-resolved conductance during gas dosing

Hydrocarbon-dosed Cu[Ni(pdt)2] pellet · Pellet

Custom-built conductivity cell; currents of 1-10 uA applied; voltage response measured with 0.5 s time resolution; rate of adsorption data from 3-Flex with 0.5 s time resolution.

Temperature: 298
Atmosphere: Ethylene dose/evacuation and ethane pressure step examples
Geometry: Pressed pellet on PCB gas-cell assembly
Context: Guest-loaded framework dynamics
Measurement source: main p.5007 · Time Resolved Conductivity Measurements upon Gas Adsorption · Figures S9-S10; Figure 6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Baseline noise standard deviation	about 0.7 mV	—	—	Text Approximate	main p.5007 · Time Resolved Conductivity Measurements upon Gas Adsorption
Ethylene dose-evacuation conductance saturation time	about 10 s	—	—	Text Approximate	main p.5009 · Modulation of Conductivity upon Gas Adsorption · Figure S9
Signal-to-noise ratio for first Figure S10 pressure point	about 3:1	—	—	Text Approximate	main p.5007 · Time Resolved Conductivity Measurements upon Gas Adsorption · Figure S10
Conductivity time resolution	0.5 s	—	—	Text Exact Reported	main p.5007 · Time Resolved Conductivity Measurements upon Gas Adsorption