Sensing Application — Structure-directing effect of terephthalate in bridging Zn(ii)- and Cd(ii)-based coordination polymers towards application in the detection of trace quantities of Pd2+ in aqueous media and their electrical conductivities

2 measurement groups · 8 results

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

Fluorescence quenching Pd2+ sensing

Photoluminescence and fluorescence spectroscopy

CP1 as-synthesised block-shaped yellow crystals · Single Crystal

CP1 stock suspension in DMF/water medium; metal salt solutions at 10^-3 M, 25 uM equivalent added; pH 7.2 HEPES buffer; PdCl2 aqueous suspension used for sensing efficiency.

Atmosphere: ambient
Geometry: cuvette suspension
Context: pristine CP1 sensor challenged with Pd2+ and competing ions
Measurement source: 16-19 · UV-Visible and Fluorescence Spectral Experiments · Fig. S11-S15

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Stern-Volmer constant for Pd2+	3.26 x 10^5 M-1	—	—	Text Exact Reported	5 · Sensing studies · Fig. S13a
Pd2+ limit of detectionMarked as a best value within this paper	79.1 nM / 0.0791 uM	—	—	Text Exact Reported	5 · Sensing studies · Fig. S14/Table S8
pH stability of emission	no significant pH 2-12 effect	—	—	Text Qualitative	5 · Sensing studies · Fig. S16
selective quenching by Pd2+ among tested ions	no significant emissivity change except for Pd2+	—	—	Text Qualitative	5 · Sensing studies · Fig. S12/Fig. 3

Fluorescence quenching Pd2+ sensing

Photoluminescence and fluorescence spectroscopy

CP2 as-synthesised yellow needle-like crystals · Single Crystal

CP2 stock suspension in DMF/water medium; metal salt solutions at 10^-3 M, 25 uM equivalent added; pH 7.2 HEPES buffer; PdCl2 aqueous suspension used for sensing efficiency.

Atmosphere: ambient
Geometry: cuvette suspension
Context: pristine CP2 sensor challenged with Pd2+ and competing ions
Measurement source: 16-19 · UV-Visible and Fluorescence Spectral Experiments · Fig. S11-S15

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Stern-Volmer constant for Pd2+	2.998 x 10^5 M-1	—	—	Text Exact Reported	5 · Sensing studies · Fig. S13b
Pd2+ limit of detectionMarked as a best value within this paper	89.2 nM / 0.0892 uM	—	—	Text Exact Reported	5 · Sensing studies · Fig. S14/Table S8
pH stability of emission	no significant pH 2-12 effect	—	—	Text Qualitative	5 · Sensing studies · Fig. S16
selective quenching by Pd2+ among tested ions	no significant emissivity change except for Pd2+	—	—	Text Qualitative	5 · Sensing studies · Fig. S12/Fig. 4