Sensing Application — Conductive metal organic framework for ion-selective membrane-free solid-contact potentiometric Cu2+ sensing

11 measurement groups · 48 results

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

Carry-over repeatability test

ISM-free Cu3(HHTP)2/PVDF-coated GCE solid-contact ion-selective electrode · Electrode

Cu2+ activity detection repeated five times and calibration slopes compared.

Atmosphere: Aqueous CuCl2
Geometry: ISM-free Cu3(HHTP)2/PVDF electrode
Context: ISM-free target electrode
Measurement source: p005-p006 · 3.5 ISM-free Cu3(HHTP)2 with short conditioning · Fig. 5e-f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Five-cycle carry-over calibration slope	28.8 +/- 0.9 mV dec-1	—	+/- 0.9 mV dec-1	Text Exact Reported	p005 · 3.5 ISM-free Cu3(HHTP)2 with short conditioning · Fig. 5f

Gas and light interference potentiometry

ISM-free Cu3(HHTP)2/PVDF-coated GCE solid-contact ion-selective electrode · Electrode

EMF in 0.01 M CuCl2 recorded after N2, O2, and CO2 bubbling; light test used alternating dark/light conditions for 1200 s.

Atmosphere: N2/O2/CO2 and light/dark interruptions
Geometry: Cu3(HHTP)2 and Cu3(HHTP)2/ISM electrodes compared
Context: Target and ISM comparator
Measurement source: p005 · 3.3 Anti-interference capability · Fig. 3b-c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Gas-interference potential changeMarked as a best value within this paper	2.32 mV	—	—	Text Exact Reported	p005 · 3.3 Anti-interference capability · Fig. 3b
Gas-interference potential change	3.25 mV	—	—	Text Exact Reported	p005 · 3.3 Anti-interference capability · Fig. 3b
Light-interference potential variationMarked as a best value within this paper	0.97 mV	—	—	Text Exact Reported	p005 · 3.3 Anti-interference capability · Fig. 3c
Light-interference potential variation	1.41 mV	—	—	Text Exact Reported	p005 · 3.3 Anti-interference capability · Fig. 3c

Potentiometric Cu2+ calibration

ISM-free Cu3(HHTP)2/PVDF-coated GCE solid-contact ion-selective electrode · Electrode

CuCl2 aqueous solutions from 10^-7 to 10^-1 M; EMF recorded after 15 s equilibration; response time determined at 0.5 mV from final EMF.

Atmosphere: Aqueous solution
Geometry: Two- or three-electrode potentiometry with Cu3(HHTP)2 working electrode and Hg/Hg2Cl2 reference.
Context: ISM-free Cu3(HHTP)2/PVDF electrode
Measurement source: p003 · 3.2 Potentiometric Cu2+ responses · Fig. 2b-c; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Standard potential E0	173.8 +/- 3.5 mV	—	+/- 3.5 mV	SI Table Exact Reported	p004 · Supplementary Table S2 · Table S2
Linear detection range	10^-2 to 10^-4 M	—	—	SI Table Range	p004 · Supplementary Table S2 · Table S2
Limit of detection	10^-4.5 M; 3.16 x 10^-5 M in Table S3	—	—	SI Table Rounded Reported	p004 · Supplementary Table S3 · Table S3
Calibration linear fit R2	R2 = 0.9998	—	—	Text Exact Reported	p003 · 3.2 Potentiometric Cu2+ responses · Fig. 2c
Potentiometric response timeMarked as a best value within this paper	<10 s	—	—	SI Table Range	p004 · Supplementary Table S3 · Table S3
Cu2+ calibration slopeMarked as a best value within this paper	29.5 +/- 0.3 mV dec-1	—	+/- 0.3 mV dec-1	SI Table Exact Reported	p004 · Supplementary Table S2 · Table S2

Potentiometric Cu2+ calibration

Cu3(HHTP)2/ISM Cu2+-selective electrode · Electrode

CuCl2 aqueous solutions from 10^-9 to 10^-1 M for ISM comparator; same response-time criterion.

Atmosphere: Aqueous solution
Geometry: Cu3(HHTP)2/ISM working electrode and Hg/Hg2Cl2 reference.
Context: Cu3(HHTP)2/PVDF solid contact plus Cu2+-ISM
Measurement source: p003 · 3.2 Potentiometric Cu2+ responses · Fig. 2d-e; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Standard potential E0	111.2 +/- 12.5 mV	—	+/- 12.5 mV	SI Table Exact Reported	p004 · Supplementary Table S2 · Table S2
Linear detection range	10^-3 to 10^-6 M	—	—	SI Table Range	p004 · Supplementary Table S2 · Table S2
Limit of detectionMarked as a best value within this paper	10^-6.5 M; 3.31 x 10^-7 M in Table S3	—	—	SI Table Rounded Reported	p004 · Supplementary Table S3 · Table S3
Calibration linear fit R2	R2 = 0.9995	—	—	Text Exact Reported	p003 · 3.2 Potentiometric Cu2+ responses · Fig. 2e
Potentiometric response time	~50 s	—	—	SI Table Approximate	p004 · Supplementary Table S3 · Table S3
Cu2+ calibration slope	30.6 +/- 0.4 mV dec-1	—	+/- 0.4 mV dec-1	SI Table Exact Reported	p004 · Supplementary Table S2 · Table S2

Redox Fe2+/Fe3+ interference test

ISM-free Cu3(HHTP)2/PVDF-coated GCE solid-contact ion-selective electrode · Electrode

Potential response of Cu3(HHTP)2 SC-ISE compared with Pt electrode in Fe2+/Fe3+ solutions with different concentration ratios.

Atmosphere: Aqueous Fe2+/Fe3+ redox solutions
Geometry: Cu3(HHTP)2 SC-ISE in parallel with Pt electrode
Context: ISM-free target electrode
Measurement source: p005 · 3.3 Anti-interference capability · Figure S4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe2+/Fe3+ redox-interference potential fluctuationMarked as a best value within this paper	<5 mV	—	—	Text Range	p005 · 3.3 Anti-interference capability · Figure S4

Separate solution method selectivity test

ISM-free Cu3(HHTP)2/PVDF-coated GCE solid-contact ion-selective electrode · Electrode

Cu2+ response compared with Li+, Na+, K+, Mg2+, Zn2+, Ni2+, and Co2+; selectivity coefficients reported as log Kij.

Atmosphere: Aqueous solution
Geometry: ISM-free Cu3(HHTP)2/PVDF electrode
Context: ISM-free target electrode
Measurement source: p004 · 3.3 Anti-interference capability, water layer and impedance spectra · Fig. 3a; Table S4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Log Kij for Co2+	-1.2	—	—	SI Table Exact Reported	p005 · Supplementary Table S4 · Table S4
Log Kij for K+	-1.157	—	—	SI Table Exact Reported	p005 · Supplementary Table S4 · Table S4
Log Kij for Li+Marked as a best value within this paper	-3.026	—	—	SI Table Exact Reported	p005 · Supplementary Table S4 · Table S4
Log Kij for Mg2+	-1.711	—	—	SI Table Exact Reported	p005 · Supplementary Table S4 · Table S4
Log Kij for Na+	-1.257	—	—	SI Table Exact Reported	p005 · Supplementary Table S4 · Table S4
Log Kij for Ni2+	-1.45	—	—	SI Table Exact Reported	p005 · Supplementary Table S4 · Table S4
Log Kij for Zn2+	-1.135	—	—	SI Table Exact Reported	p005 · Supplementary Table S4 · Table S4

Separate solution method selectivity test

Cu3(HHTP)2/ISM Cu2+-selective electrode · Electrode

Cu2+ response compared with Li+, Na+, K+, Mg2+, Zn2+, Ni2+, and Co2+; selectivity coefficients reported as log Kij.

Atmosphere: Aqueous solution
Geometry: Cu3(HHTP)2/ISM electrode
Context: ISM comparator electrode
Measurement source: p004 · 3.3 Anti-interference capability, water layer and impedance spectra · Fig. 3a; Table S5

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Log Kij for Co2+	-5.65	—	—	SI Table Exact Reported	p005 · Supplementary Table S5 · Table S5
Log Kij for K+	-1.04	—	—	SI Table Exact Reported	p005 · Supplementary Table S5 · Table S5
Log Kij for Li+	-2.05	—	—	SI Table Exact Reported	p005 · Supplementary Table S5 · Table S5
Log Kij for Mg2+Marked as a best value within this paper	-6.31	—	—	SI Table Exact Reported	p005 · Supplementary Table S5 · Table S5
Log Kij for Na+	-1.64	—	—	SI Table Exact Reported	p005 · Supplementary Table S5 · Table S5
Log Kij for Ni2+	-6.24	—	—	SI Table Exact Reported	p005 · Supplementary Table S5 · Table S5
Log Kij for Zn2+	-6.04	—	—	SI Table Exact Reported	p005 · Supplementary Table S5 · Table S5

Short-conditioning potentiometric Cu2+ calibration

ISM-free Cu3(HHTP)2/PVDF-coated GCE solid-contact ion-selective electrode · Electrode

Electrodes conditioned in 1 x 10^-4 M CuCl2 for ca. 15 min before Cu2+ activity response testing.

Atmosphere: Aqueous CuCl2
Geometry: Cu3(HHTP)2 and Cu3(HHTP)2/ISM electrodes
Context: Target and ISM comparator
Measurement source: p005 · 3.5 ISM-free Cu3(HHTP)2 with short conditioning · Fig. 5a-d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
R2 after ca. 15 min conditioning	R2 = 0.9986	—	—	Text Exact Reported	p005 · 3.5 ISM-free Cu3(HHTP)2 with short conditioning · Fig. 5d
Response time after ca. 15 min conditioningMarked as a best value within this paper	<10 s	—	—	Text Range	p005 · 3.5 ISM-free Cu3(HHTP)2 with short conditioning · Fig. 5b
Cu2+ slope after ca. 15 min conditioningMarked as a best value within this paper	27.8 +/- 1.0 mV dec-1	—	+/- 1.0 mV dec-1	Text Exact Reported	p005 · 3.5 ISM-free Cu3(HHTP)2 with short conditioning · Fig. 5d
Cu3(HHTP)2/ISM response after ca. 15 min conditioning	nearly no response toward Cu2+	—	—	Text Qualitative	p005 · 3.5 ISM-free Cu3(HHTP)2 with short conditioning · Fig. 5c-d

Organic solvent resistance test in ethanol

ISM-free Cu3(HHTP)2/PVDF-coated GCE solid-contact ion-selective electrode · Electrode

Cu3(HHTP)2 and Cu3(HHTP)2/ISM electrodes immersed in ethanol for 4 h, then Cu2+ calibration measured before and after soaking.

Atmosphere: Ethanol exposure followed by aqueous Cu2+ calibration
Geometry: Cu3(HHTP)2 and Cu3(HHTP)2/ISM electrodes
Context: Target and ISM comparator
Measurement source: p005 · 3.4 Organic solvent resistance · Fig. 4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu2+ slope after ethanol soakingMarked as a best value within this paper	30.1 +/- 0.5 mV dec-1	—	+/- 0.5 mV dec-1	Text Exact Reported	p005 · 3.4 Organic solvent resistance · Fig. 4d
Cu2+ slope before ethanol soaking	28.7 +/- 0.9 mV dec-1	—	+/- 0.9 mV dec-1	Text Exact Reported	p005 · 3.4 Organic solvent resistance · Fig. 4d
Response after ethanol soaking	potential response lost after soaking in ethanol	—	—	Text Qualitative	p005 · 3.4 Organic solvent resistance · Fig. 4c
Cu2+ slope before ethanol soaking	31.2 +/- 0.5 mV dec-1	—	+/- 0.5 mV dec-1	Text Exact Reported	p005 · 3.4 Organic solvent resistance · Fig. 4c

Organic solvent resistance test in methanol and acetonitrile

ISM-free Cu3(HHTP)2/PVDF-coated GCE solid-contact ion-selective electrode · Electrode

Calibration curves before and after immersion in MeOH and MeCN solvents; slopes printed in SI Figure S5.

Atmosphere: MeOH or MeCN exposure followed by aqueous Cu2+ calibration
Geometry: Cu3(HHTP)2 and Cu3(HHTP)2/ISM electrodes
Context: Target and ISM comparator
Measurement source: p003 · Supplementary Figure S5 · Figure S5

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cu2+ slope after MeCN soaking	y = 30.4x + 314.3	—	—	Figure Axis Rounded Reported	p003 · Supplementary Figure S5 · Figure S5d
Cu2+ slope before MeCN soaking	y = 28.2x + 307.6	—	—	Figure Axis Rounded Reported	p003 · Supplementary Figure S5 · Figure S5d
Cu3(HHTP)2/ISM Cu2+ slope after MeCN soaking	y = 9.9x + 218.9	—	—	Figure Axis Rounded Reported	p003 · Supplementary Figure S5 · Figure S5c
Cu2+ slope after MeOH soaking	y = 28.9x + 312.5	—	—	Figure Axis Rounded Reported	p003 · Supplementary Figure S5 · Figure S5b
Cu2+ slope before MeOH soaking	y = 30.5x + 312.8	—	—	Figure Axis Rounded Reported	p003 · Supplementary Figure S5 · Figure S5b
Cu3(HHTP)2/ISM Cu2+ slope after MeOH soaking	y = 8.3x + 197.8	—	—	Figure Axis Rounded Reported	p003 · Supplementary Figure S5 · Figure S5a

Water-layer test

ISM-free Cu3(HHTP)2/PVDF-coated GCE solid-contact ion-selective electrode · Electrode

Potential drift monitored while changing CuCl2 to interfering LiCl and back to CuCl2.

Atmosphere: Aqueous solution
Geometry: Cu3(HHTP)2 and Cu3(HHTP)2/ISM electrodes compared
Context: Target and ISM comparator
Measurement source: p005 · 3.3 Anti-interference capability · Fig. 3d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Water-layer return drift Delta EMarked as a best value within this paper	Delta E = 1.1 mV	—	—	Text Exact Reported	p005 · 3.3 Anti-interference capability · Fig. 3d
Water-layer return drift Delta E	Delta E = 3.6 mV	—	—	Text Exact Reported	p005 · 3.3 Anti-interference capability · Fig. 3d